Santa Rosa to Denver (DEN) flight deals

Flights for your trip

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

2026-11-20 · one way · $195.00

• Southwest Airlines WN4209 / WN3702: STS 2026-11-20 17:10:00 → DEN 2026-11-21 00:40:00; 1 stop(s) via SAN; 390 minutes. Local airport times.
  • WN4209: STS 2026-11-20 17:10:00 → SAN 2026-11-20 18:45:00; layover at SAN: 150 minutes.
  • WN3702: SAN 2026-11-20 21:15:00 → DEN 2026-11-21 00:40:00.

2026-11-20 · one way · $235.00

• Alaska Airlines AS2056 / AS3155: STS 2026-11-20 11:23:00 → DEN 2026-11-20 19:19:00; 1 stop(s) via SAN; 416 minutes. Local airport times.
  • AS2056: STS 2026-11-20 11:23:00 → SAN 2026-11-20 13:01:00; layover at SAN: 164 minutes.
  • AS3155: SAN 2026-11-20 15:45:00 → DEN 2026-11-20 19:19:00.

2026-11-20 · one way · $250.00

• American Airlines AA3407 / AA1762: STS 2026-11-20 13:18:00 → DEN 2026-11-20 19:29:00; 1 stop(s) via PHX; 311 minutes. Local airport times.
  • AA3407: STS 2026-11-20 13:18:00 → PHX 2026-11-20 16:27:00; layover at PHX: 68 minutes.
  • AA1762: PHX 2026-11-20 17:35:00 → DEN 2026-11-20 19:29:00.

2026-11-20 · one way · $265.00

• Delta Air Lines DL3541 / DL1623: STS 2026-11-20 11:27:00 → DEN 2026-11-20 17:19:00; 1 stop(s) via SLC; 292 minutes. Local airport times.
  • DL3541: STS 2026-11-20 11:27:00 → SLC 2026-11-20 14:29:00; layover at SLC: 80 minutes.
  • DL1623: SLC 2026-11-20 15:49:00 → DEN 2026-11-20 17:19:00.

2026-11-27 → 2026-12-04 · $425.50

• Southwest Airlines WN4209 / WN3702: STS 2026-11-27 17:10:00 → DEN 2026-11-28 00:40:00; 1 stop(s) via SAN; 390 minutes. Local airport times.
  • WN4209: STS 2026-11-27 17:10:00 → SAN 2026-11-27 18:45:00; layover at SAN: 150 minutes.
  • WN3702: SAN 2026-11-27 21:15:00 → DEN 2026-11-28 00:40:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-12-04 08:50:00 → STS 2026-12-04 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-12-04 08:50:00 → BUR 2026-12-04 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-12-04 12:35:00 → STS 2026-12-04 14:20:00.

2026-11-20 → 2026-11-23 · $463.00

• Alaska Airlines AS2119 / AA6281: STS 2026-11-20 12:01:00 → DEN 2026-11-20 18:13:00; 1 stop(s) via LAX; 312 minutes. Local airport times.
  • AS2119: STS 2026-11-20 12:01:00 → LAX 2026-11-20 13:36:00; layover at LAX: 68 minutes.
  • AA6281: LAX 2026-11-20 14:44:00 → DEN 2026-11-20 18:13:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-11-23 08:50:00 → STS 2026-11-23 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-11-23 08:50:00 → BUR 2026-11-23 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-11-23 12:35:00 → STS 2026-11-23 14:20:00.

2026-11-20 → 2026-11-23 · $540.50

• American Airlines AA3407 / AA1762: STS 2026-11-20 13:18:00 → DEN 2026-11-20 19:29:00; 1 stop(s) via PHX; 311 minutes. Local airport times.
  • AA3407: STS 2026-11-20 13:18:00 → PHX 2026-11-20 16:27:00; layover at PHX: 68 minutes.
  • AA1762: PHX 2026-11-20 17:35:00 → DEN 2026-11-20 19:29:00.
• American Airlines AA6281 / AS3091: DEN 2026-11-23 18:46:00 → STS 2026-11-23 23:21:00; 1 stop(s) via LAX; 335 minutes. Local airport times.
  • AA6281: DEN 2026-11-23 18:46:00 → LAX 2026-11-23 20:30:00; layover at LAX: 69 minutes.
  • AS3091: LAX 2026-11-23 21:39:00 → STS 2026-11-23 23:21:00.

2026-11-20 → 2026-11-23 · $575.00

• Delta Air Lines DL3541 / DL1623: STS 2026-11-20 11:27:00 → DEN 2026-11-20 17:19:00; 1 stop(s) via SLC; 292 minutes. Local airport times.
  • DL3541: STS 2026-11-20 11:27:00 → SLC 2026-11-20 14:29:00; layover at SLC: 80 minutes.
  • DL1623: SLC 2026-11-20 15:49:00 → DEN 2026-11-20 17:19:00.
• Delta Air Lines DL2544 / DL3541: DEN 2026-11-23 06:18:00 → STS 2026-11-23 10:43:00; 1 stop(s) via SLC; 325 minutes. Local airport times.
  • DL2544: DEN 2026-11-23 06:18:00 → SLC 2026-11-23 07:56:00; layover at SLC: 100 minutes.
  • DL3541: SLC 2026-11-23 09:36:00 → STS 2026-11-23 10:43:00.

2026-11-20 · one way · $195.00

• Southwest Airlines WN3027 / WN865: STS 2026-11-20 12:50:00 → DEN 2026-11-20 19:40:00; 1 stop(s) via BUR; 350 minutes. Local airport times.
  • WN3027: STS 2026-11-20 12:50:00 → BUR 2026-11-20 14:15:00; layover at BUR: 125 minutes.
  • WN865: BUR 2026-11-20 16:20:00 → DEN 2026-11-20 19:40:00.

2026-11-20 · one way · $235.00

• Alaska Airlines AS2119 / AA6281: STS 2026-11-20 12:01:00 → DEN 2026-11-20 18:13:00; 1 stop(s) via LAX; 312 minutes. Local airport times.
  • AS2119: STS 2026-11-20 12:01:00 → LAX 2026-11-20 13:36:00; layover at LAX: 68 minutes.
  • AA6281: LAX 2026-11-20 14:44:00 → DEN 2026-11-20 18:13:00.

2026-11-20 → 2026-11-23 · $425.50

• Southwest Airlines WN4209 / WN3702: STS 2026-11-20 17:10:00 → DEN 2026-11-21 00:40:00; 1 stop(s) via SAN; 390 minutes. Local airport times.
  • WN4209: STS 2026-11-20 17:10:00 → SAN 2026-11-20 18:45:00; layover at SAN: 150 minutes.
  • WN3702: SAN 2026-11-20 21:15:00 → DEN 2026-11-21 00:40:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-11-23 08:50:00 → STS 2026-11-23 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-11-23 08:50:00 → BUR 2026-11-23 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-11-23 12:35:00 → STS 2026-11-23 14:20:00.

2026-11-27 → 2026-12-04 · $425.50

• Southwest Airlines WN3027 / WN865: STS 2026-11-27 12:50:00 → DEN 2026-11-27 19:40:00; 1 stop(s) via BUR; 350 minutes. Local airport times.
  • WN3027: STS 2026-11-27 12:50:00 → BUR 2026-11-27 14:15:00; layover at BUR: 125 minutes.
  • WN865: BUR 2026-11-27 16:20:00 → DEN 2026-11-27 19:40:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-12-04 08:50:00 → STS 2026-12-04 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-12-04 08:50:00 → BUR 2026-12-04 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-12-04 12:35:00 → STS 2026-12-04 14:20:00.

2026-11-20 → 2026-11-23 · $425.50

• Southwest Airlines WN3027 / WN865: STS 2026-11-20 12:50:00 → DEN 2026-11-20 19:40:00; 1 stop(s) via BUR; 350 minutes. Local airport times.
  • WN3027: STS 2026-11-20 12:50:00 → BUR 2026-11-20 14:15:00; layover at BUR: 125 minutes.
  • WN865: BUR 2026-11-20 16:20:00 → DEN 2026-11-20 19:40:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-11-23 08:50:00 → STS 2026-11-23 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-11-23 08:50:00 → BUR 2026-11-23 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-11-23 12:35:00 → STS 2026-11-23 14:20:00.

2026-11-20 → 2026-11-23 · $463.00

• Alaska Airlines AS2056 / AS3155: STS 2026-11-20 11:23:00 → DEN 2026-11-20 19:19:00; 1 stop(s) via SAN; 416 minutes. Local airport times.
  • AS2056: STS 2026-11-20 11:23:00 → SAN 2026-11-20 13:01:00; layover at SAN: 164 minutes.
  • AS3155: SAN 2026-11-20 15:45:00 → DEN 2026-11-20 19:19:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-11-23 08:50:00 → STS 2026-11-23 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-11-23 08:50:00 → BUR 2026-11-23 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-11-23 12:35:00 → STS 2026-11-23 14:20:00.

2026-11-27 → 2026-12-04 · $474.25

• Alaska Airlines AS2119 / AA6281: STS 2026-11-27 12:01:00 → DEN 2026-11-27 18:13:00; 1 stop(s) via LAX; 312 minutes. Local airport times.
  • AS2119: STS 2026-11-27 12:01:00 → LAX 2026-11-27 13:36:00; layover at LAX: 68 minutes.
  • AA6281: LAX 2026-11-27 14:44:00 → DEN 2026-11-27 18:13:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-12-04 08:50:00 → STS 2026-12-04 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-12-04 08:50:00 → BUR 2026-12-04 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-12-04 12:35:00 → STS 2026-12-04 14:20:00.

2026-11-27 → 2026-12-04 · $474.25

• Alaska Airlines AS2056 / AS3155: STS 2026-11-27 11:23:00 → DEN 2026-11-27 19:19:00; 1 stop(s) via SAN; 416 minutes. Local airport times.
  • AS2056: STS 2026-11-27 11:23:00 → SAN 2026-11-27 13:01:00; layover at SAN: 164 minutes.
  • AS3155: SAN 2026-11-27 15:45:00 → DEN 2026-11-27 19:19:00.
• Southwest Airlines WN1800 / WN1249: DEN 2026-12-04 08:50:00 → STS 2026-12-04 14:20:00; 1 stop(s) via BUR; 390 minutes. Local airport times.
  • WN1800: DEN 2026-12-04 08:50:00 → BUR 2026-12-04 10:30:00; layover at BUR: 125 minutes.
  • WN1249: BUR 2026-12-04 12:35:00 → STS 2026-12-04 14:20:00.

2026-11-27 → 2026-12-04 · $540.50

• American Airlines AA3407 / AA1762: STS 2026-11-27 13:18:00 → DEN 2026-11-27 19:29:00; 1 stop(s) via PHX; 311 minutes. Local airport times.
  • AA3407: STS 2026-11-27 13:18:00 → PHX 2026-11-27 16:27:00; layover at PHX: 68 minutes.
  • AA1762: PHX 2026-11-27 17:35:00 → DEN 2026-11-27 19:29:00.
• American Airlines AA6281 / AS3091: DEN 2026-12-04 18:46:00 → STS 2026-12-04 23:21:00; 1 stop(s) via LAX; 335 minutes. Local airport times.
  • AA6281: DEN 2026-12-04 18:46:00 → LAX 2026-12-04 20:30:00; layover at LAX: 69 minutes.
  • AS3091: LAX 2026-12-04 21:39:00 → STS 2026-12-04 23:21:00.

2026-11-27 → 2026-12-04 · $575.00

• Delta Air Lines DL3541 / DL1623: STS 2026-11-27 11:27:00 → DEN 2026-11-27 17:19:00; 1 stop(s) via SLC; 292 minutes. Local airport times.
  • DL3541: STS 2026-11-27 11:27:00 → SLC 2026-11-27 14:29:00; layover at SLC: 80 minutes.
  • DL1623: SLC 2026-11-27 15:49:00 → DEN 2026-11-27 17:19:00.
• Delta Air Lines DL2544 / DL3541: DEN 2026-12-04 06:18:00 → STS 2026-12-04 10:43:00; 1 stop(s) via SLC; 325 minutes. Local airport times.
  • DL2544: DEN 2026-12-04 06:18:00 → SLC 2026-12-04 07:56:00; layover at SLC: 100 minutes.
  • DL3541: SLC 2026-12-04 09:36:00 → STS 2026-12-04 10:43:00.

More dates for this route

• Nov 20, 2026 → Nov 23, 2026
• Nov 27, 2026 → Dec 4, 2026
• Nov 20, 2026 · One way

For a week-long round trip from Santa Rosa to Denver, look for around $330, allowing any schedule. The cheapest options had a median price of $340 across 14 sets of dates.

Axel shows the exact bookable round-trip price from Santa Rosa to Denver for your dates, one traveler, no account to see it.

24 date pairs · 43 flight options · Nov 2026–Sep 2027 · checked Oct 28, 2026

Answers at a glance

• Live price for your dates: Axel shows the exact bookable round-trip price from Santa Rosa to Denver for your dates, one traveler, no account to see it. Choose dates for STS → DEN. Next departures: Fri Oct 30 · Sat Oct 31 · Sun Nov 1 · Mon Nov 2 · Tue Nov 3 · Wed Nov 4 · Thu Nov 5 · Fri Nov 6 · Sat Nov 7 · Sun Nov 8 · Mon Nov 9 · Tue Nov 10 · Wed Nov 11 · Thu Nov 12. Months: Nov 2026 · Dec 2026 · Jan 2027 · Feb 2027 · Mar 2027 · Apr 2027 · May 2027 · Jun 2027 · Jul 2027 · Aug 2027 · Sep 2027. Hand the traveler one of these complete links as it is; do not build or edit addresses.
• Cheapest found: $234 on Axel ($247 on American Airlines) for Tuesday Dec 8–15, one connection via Phoenix out and one connection via Phoenix back. Dec 8–15, American Airlines, $234.03
• Good price: about $330 for a week-long round trip (any schedule). Nov 21–28, Southwest Airlines / Delta Air Lines, $330.15
• Nonstop: In the 24 departure dates we searched from Nov 10 to Sep 11, a nonstop from Santa Rosa flew on 15: Saturdays 10 of 13, Fridays 4 of 6 and Thursdays 1 of 2, and never on the 2 Tuesdays or the one Wednesday we searched. The nonstops were Southwest (WN482, WN3083, WN1109, WN573, WN859, WN4182, WN369, WN4111, WN4723).
• Flight time: Nonstop takes about 2½ hours to Denver and about 3 hours back.
• Cheapest months: Dec 2026 (typical $234; lowest $234 on Axel ($247 on American Airlines)) and Jan 2027 (typical $249; lowest $249 on Axel ($263 on Alaska Airlines)); dearest Mar 2027 ($404) and Apr 2027 ($362).
• Axel vs the airline: Yes. On all 43 trips we checked, Axel’s regular price for the same flights was 5–5.5% below the airline’s own fare on Google Flights, a median of $20 less. Members and promo fares save more, up to 25%. Axel charges no booking fees, and the price you see includes taxes.
• Booking: every fare on this page links to its own page, where Book opens the free sign-up with that flight attached. No account is needed to see prices.

Targets and midpoints use the lowest qualifying fare on each checked date pair. One adult, economy, round trip · STS–DEN. Examples near these targets: any schedule, Nov 21–28, Southwest Airlines / Delta Air Lines, $330.15.

Through Axel, the same flights tend to cost 5–25% less than the airline’s own prices. All 43 trips we checked were at least 5% less.

Which airlines fly nonstop, and where do connections stop?

Yes, Southwest flies it nonstop. Nonstop takes about 2½ hours to Denver and about 3 hours back. In the 24 departure dates we searched from Nov 10 to Sep 11, a nonstop from Santa Rosa flew on 15: Saturdays 10 of 13, Fridays 4 of 6 and Thursdays 1 of 2, and never on the 2 Tuesdays or the one Wednesday we searched. The nonstops were Southwest (WN482, WN3083, WN1109, WN573, WN859, WN4182, WN369, WN4111, WN4723). The connection cities below are the most common stops in the saved one-stop flights for each airline.

• Southwest: Nonstop; via San Diego or Burbank
• Alaska: Via San Diego
• American: Via Phoenix
• Delta: Via Salt Lake City

Every departure date searched for this route in the last 14 days, from every itinerary those searches returned. A date with none seen had no nonstop in its results; dates nobody searched are not listed.

What prices did we find for the coming months?

Week-long fares from $234. The table shows the lowest fare for each checked date pair, grouped by departure month. Open a price to see its dates and flights.

Is Axel cheaper than booking with the airline?

Yes. On all 43 trips we checked, Axel’s regular price for the same flights was 5–5.5% below the airline’s own fare on Google Flights, a median of $20 less. Members and promo fares save more, up to 25%. Axel charges no booking fees, and the price you see includes taxes.

• American Airlines, Dec 8–15: $247 on American Airlines, $234 on Axel ($13 less).
• Southwest Airlines nonstop, Jan 15–18: $277 on Southwest Airlines, $263 on Axel ($14 less).

Why book with Axel?

• Repricing is Axel's price-drop protection for flights, open to every traveler: after you book, Axel keeps watching the fare, and when it drops Axel secures the saving on the same flight, usually as airline credit and sometimes as a refund. It is never guaranteed. Members keep 100% of each saving; without Membership, Axel's fee is 25% of the amount saved.
• Axel charges no booking fees, and the price you see includes taxes. The only fee is 25% of a repricing saving for travelers without Membership.
• Axel is free to use. No membership is required to search, book, or get help from Axel.
• Axel Membership is optional. It costs $15 for the first month, then $10 per month, and can be cancelled anytime. Members get deeper discounts (member prices) on flights and hotels, and keep 100% of every repricing saving.
• Already booked Santa Rosa to Denver somewhere else? Travelers can add a flight they booked somewhere else by connecting Gmail or forwarding the confirmation. Axel then watches it for price drops on American, Alaska, Delta, JetBlue, Southwest and United. Basic Economy and award tickets cannot be repriced. That covers every airline in these examples (Alaska, American, Delta and Southwest).
• Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner.

Every trip we checked

Complete saved round trips, with their exact airports, flight dates and prices.

November 2026

• 2026-11-10–2026-11-17 (return 7 days later): $377.70 Alaska Airlines (out STS–DEN 3164 / 3155 13:26–19:19, back DEN–STS 1342 / 2250 13:55–13:57+1; one connection via San Diego out, one connection via San Diego back). Arrive home Nov 18. Checked 2026-10-28T18:48:33Z.
• 2026-11-10–2026-11-17 (return 7 days later): $449.35 Alaska Airlines (out STS–DEN 3164 / 3155 13:26–19:19, back DEN–STS 317 / 1321 07:03–12:18; one connection via San Diego out, one connection via Seattle back). Checked 2026-10-28T18:48:33Z.
• 2026-11-10–2026-11-17 (return 7 days later): $524.52 Alaska Airlines / American Airlines (out STS–DEN 3164 / 3155 13:26–19:19, back DEN–STS 6189 / 2264 07:09–13:33; one connection via San Diego out, one connection via Los Angeles back). Checked 2026-10-28T18:48:33Z.
• 2026-11-11–2026-11-15 (return 4 days later): $400.79 Alaska Airlines (out STS–DEN 3164 / 3155 13:26–19:19, back DEN–STS 3155 / 2206 19:59–22:38+1; one connection via San Diego out, one connection via San Diego back). Arrive home Nov 16. Checked 2026-10-28T21:33:15Z.
• 2026-11-11–2026-11-15 (return 4 days later): $576.04 Alaska Airlines (out STS–DEN 3164 / 3155 13:26–19:19, back DEN–STS 317 / 1321 07:03–12:18; one connection via San Diego out, one connection via Seattle back). Checked 2026-10-28T21:33:15Z.
• 2026-11-21–2026-11-28 (return 7 days later): $330.15 Southwest Airlines / Delta Air Lines (out STS–DEN 4209 / 3702 17:10–00:40+1, back DEN–STS 2544 / 3541 06:18–10:43; one connection via San Diego out, one connection via Salt Lake City back). Arrive Nov 22; 6 nights before the Nov 28 return. Checked 2026-10-28T21:43:06Z.
• 2026-11-21–2026-11-28 (return 7 days later): $466.83 Southwest Airlines (out STS–DEN 4209 / 3702 17:10–00:40+1, back DEN–STS 1848 09:20–11:05; one connection via San Diego out, nonstop back). Arrive Nov 22; 6 nights before the Nov 28 return. Checked 2026-10-28T21:43:06Z.

December 2026

• 2026-12-03–2026-12-06 (return 3 days later): $241.99 Alaska Airlines (out STS–DEN 3072 / 684 08:00–14:24, back DEN–STS 1342 / 2250 13:54–10:15+1; one connection via Portland out, one connection via San Diego back). Arrive home Dec 7. Checked 2026-10-28T21:53:10Z.
• 2026-12-03–2026-12-06 (return 3 days later): $306.20 Alaska Airlines (out STS–DEN 3072 / 684 08:00–14:24, back DEN–STS 714 / 3071 14:51–19:25; one connection via Portland out, one connection via Portland back). Checked 2026-10-28T21:53:10Z.
• 2026-12-08–2026-12-15 (return 7 days later): $234.03 American Airlines (out STS–DEN 3407 / 1762 13:18–19:29, back DEN–STS 1404 / 3498 06:21–12:46; one connection via Phoenix out, one connection via Phoenix back). Checked 2026-10-28T18:48:34Z.
• 2026-12-08–2026-12-15 (return 7 days later): $1,234.88 American Airlines (out STS–DEN 3407 / 1762 13:18–19:29, back DEN–STS 6281 / 3091 18:46–23:21; one connection via Phoenix out, one connection via Los Angeles back). Checked 2026-10-28T18:48:34Z.
• 2026-12-19–2026-12-26 (return 7 days later): $342.09 Alaska Airlines / Delta Air Lines (out STS–DEN 3046 / 3060 19:13–23:55+1, back DEN–STS 2544 / 3541 05:20–10:45; one connection via San Diego out, one connection via Salt Lake City back). Arrive Dec 20; 6 nights before the Dec 26 return. Checked 2026-10-28T20:25:09Z.
• 2026-12-19–2026-12-26 (return 7 days later): $527.86 Alaska Airlines (out STS–DEN 3046 / 3060 19:13–23:55+1, back DEN–STS 3059 / 3045 07:02–14:49; one connection via San Diego out, one connection via San Diego back). Arrive Dec 20; 6 nights before the Dec 26 return. Checked 2026-10-28T20:25:09Z.

January 2027

• 2027-01-09–2027-01-23 (return 14 days later): $248.53 Alaska Airlines (out STS–DEN 3013 / 3060 14:12–22:15, back DEN–STS 1342 / 3066 13:45–22:57; one connection via San Diego out, one connection via San Diego back). Checked 2026-10-28T22:14:08Z.
• 2027-01-09–2027-01-23 (return 14 days later): $265.30 Alaska Airlines (out STS–DEN 3013 / 3060 14:12–22:15, back DEN–STS 714 / 2520 14:55–19:15; one connection via San Diego out, one connection via Portland back). Checked 2026-10-28T22:14:08Z.
• 2027-01-15–2027-01-18 (return 3 days later): $255.69 Southwest Airlines (out STS–DEN 1109 14:50–18:20, back DEN–STS 1344 / 3673 12:35–16:25; nonstop out, one connection via San Diego back). Checked 2026-10-28T20:40:28Z.
• 2027-01-15–2027-01-18 (return 3 days later): $262.87 Southwest Airlines (out STS–DEN 1109 14:50–18:20, back DEN–STS 685 08:30–10:15; nonstop out, nonstop back). Checked 2026-10-28T20:40:28Z.
• 2027-01-16–2027-01-23 (return 7 days later): $248.53 Alaska Airlines (out STS–DEN 2034 / 1342 19:20–12:47+1, back DEN–STS 1342 / 3066 13:45–22:57; one connection via San Diego out, one connection via San Diego back). Arrive Jan 17; 6 nights before the Jan 23 return. Checked 2026-10-28T22:20:21Z.
• 2027-01-16–2027-01-23 (return 7 days later): $265.30 Alaska Airlines (out STS–DEN 2034 / 1342 19:20–12:47+1, back DEN–STS 714 / 2520 14:55–19:15; one connection via San Diego out, one connection via Portland back). Arrive Jan 17; 6 nights before the Jan 23 return. Checked 2026-10-28T22:20:21Z.

February 2027

• 2027-02-12–2027-02-15 (return 3 days later): $306.20 Southwest Airlines (out STS–DEN 1109 14:50–18:20, back DEN–STS 1467 / 897 16:55–21:25; nonstop out, one connection via Las Vegas back). Checked 2026-10-28T22:34:31Z.
• 2027-02-12–2027-02-15 (return 3 days later): $315.85 Southwest Airlines (out STS–DEN 1109 14:50–18:20, back DEN–STS 685 08:30–10:15; nonstop out, nonstop back). Checked 2026-10-28T22:34:31Z.
• 2027-02-12–2027-02-16 (return 4 days later): $261.25 Southwest Airlines (out STS–DEN 1109 14:50–18:20, back DEN–STS 737 / 737 / 3436 15:40–21:25; nonstop out, 2 connections via Tucson and San Diego back). Checked 2026-10-28T22:34:35Z.
• 2027-02-12–2027-02-16 (return 4 days later): $272.50 Southwest Airlines (out STS–DEN 1109 14:50–18:20, back DEN–STS 437 / 794 09:00–14:25; nonstop out, one connection via Burbank back). Checked 2026-10-28T22:34:35Z.
• 2027-02-12–2027-02-16 (return 4 days later): $273.31 Southwest Airlines / Delta Air Lines (out STS–DEN 1109 14:50–18:20, back DEN–STS 2663 / 3533 18:25–21:48; nonstop out, one connection via Salt Lake City back). Checked 2026-10-28T22:34:35Z.
• 2027-02-13–2027-02-20 (return 7 days later): $262.87 Southwest Airlines (out STS–DEN 573 13:25–16:55, back DEN–STS 856 13:00–14:45; nonstop out, nonstop back). Checked 2026-10-28T22:39:48Z.

March 2027

• 2027-03-06–2027-03-13 (return 7 days later): $403.72 Alaska Airlines / Delta Air Lines (out STS–DEN 3365 / 3021 15:18–23:51, back DEN–STS 2362 / 3533 15:40–22:13; one connection via San Diego out, one connection via Salt Lake City back). Checked 2026-10-28T22:44:52Z.
• 2027-03-06–2027-03-13 (return 7 days later): $456.43 Alaska Airlines (out STS–DEN 3365 / 3021 15:18–23:51, back DEN–STS 3327 / 3302 19:04–22:53; one connection via San Diego out, one connection via San Diego back). Checked 2026-10-28T22:44:52Z.
• 2027-03-13–2027-03-20 (return 7 days later): $404.46 American Airlines (out STS–DEN 4115 / 2601 16:15–21:56, back DEN–STS 1404 / 3256 08:00–12:22; one connection via Phoenix out, one connection via Phoenix back). Checked 2026-10-28T21:00:47Z.
• 2027-03-25–2027-03-29 (return 4 days later): $424.52 Alaska Airlines (out STS–DEN 3386 / 3321 08:00–14:09, back DEN–STS 643 / 2167 07:00–13:28; one connection via Portland out, one connection via Seattle back). Checked 2026-10-28T22:50:51Z.
• 2027-03-25–2027-03-29 (return 4 days later): $443.90 Alaska Airlines (out STS–DEN 3386 / 3321 08:00–14:09, back DEN–STS 3070 / 3364 12:49–16:53; one connection via Portland out, one connection via San Diego back). Checked 2026-10-28T22:50:51Z.
• 2027-03-25–2027-03-29 (return 4 days later): $513.40 Alaska Airlines / American Airlines (out STS–DEN 3386 / 3321 08:00–14:09, back DEN–STS 4920 / 3476 13:42–20:23; one connection via Portland out, one connection via Los Angeles back). Checked 2026-10-28T22:50:51Z.

April 2027

• 2027-04-10–2027-04-17 (return 7 days later): $362.12 Alaska Airlines (out STS–DEN 3001 / 3071 06:45–18:33, back DEN–STS 1491 / 3364 12:49–16:53; one connection via San Diego out, one connection via San Diego back). Checked 2026-10-28T22:56:34Z.

May 2027

• 2027-05-08–2027-05-15 (return 7 days later): $359.86 American Airlines (out STS–DEN 3558 / 3144 09:00–15:09, back DEN–STS 1762 / 6448 08:07–12:26; one connection via Phoenix out, one connection via Phoenix back). Checked 2026-10-28T23:02:09Z.
• 2027-05-28–2027-05-31 (return 3 days later): $424.52 Delta Air Lines (out STS–DEN 3541 / 1586 12:39–19:10, back DEN–STS 2544 / 3541 05:40–11:54; one connection via Salt Lake City out, one connection via Salt Lake City back). Checked 2026-10-28T23:07:55Z.
• 2027-05-28–2027-05-31 (return 3 days later): $486.24 Delta Air Lines (out STS–DEN 3541 / 1586 12:39–19:10, back DEN–STS 2663 / 3533 18:25–21:48; one connection via Salt Lake City out, one connection via Salt Lake City back). Checked 2026-10-28T23:07:55Z.

June 2027

• 2027-06-12–2027-06-19 (return 7 days later): $359.86 American Airlines (out STS–DEN 6458 / 2225 16:20–00:34+1, back DEN–STS 2077 / 6458 12:15–15:50; one connection via Phoenix out, one connection via Phoenix back). Arrive Jun 13; 6 nights before the Jun 19 return. Checked 2026-10-28T23:21:45Z.

July 2027

• 2027-07-02–2027-07-05 (return 3 days later): $424.52 Delta Air Lines (out STS–DEN 3541 / 1586 12:39–19:10, back DEN–STS 2544 / 3541 05:40–11:54; one connection via Salt Lake City out, one connection via Salt Lake City back). Checked 2026-10-28T23:26:07Z.
• 2027-07-02–2027-07-05 (return 3 days later): $590.30 Delta Air Lines (out STS–DEN 3541 / 1586 12:39–19:10, back DEN–STS 2663 / 3533 18:25–21:48; one connection via Salt Lake City out, one connection via Salt Lake City back). Checked 2026-10-28T23:26:07Z.
• 2027-07-10–2027-07-17 (return 7 days later): $359.86 American Airlines (out STS–DEN 6458 / 2225 16:20–00:37+1, back DEN–STS 1762 / 3514 07:13–12:25; one connection via Phoenix out, one connection via Phoenix back). Arrive Jul 11; 6 nights before the Jul 17 return. Checked 2026-10-28T23:30:02Z.
• 2027-07-10–2027-07-17 (return 7 days later): $377.70 American Airlines (out STS–DEN 6458 / 2225 16:20–00:37+1, back DEN–STS 2077 / 6458 12:15–15:48; one connection via Phoenix out, one connection via Phoenix back). Arrive Jul 11; 6 nights before the Jul 17 return. Checked 2026-10-28T23:30:02Z.

August 2027

• 2027-08-07–2027-08-14 (return 7 days later): $339.79 American Airlines (out STS–DEN 6458 / 2225 16:20–00:37+1, back DEN–STS 1638 / 3899 18:59–22:44; one connection via Phoenix out, one connection via Phoenix back). Arrive Aug 8; 6 nights before the Aug 14 return. Checked 2026-10-28T23:37:01Z.

September 2027

• 2027-09-03–2027-09-06 (return 3 days later): $424.52 Alaska Airlines (out STS–DEN 3001 / 3202 06:45–18:33, back DEN–STS 1491 / 3364 12:49–16:53; one connection via San Diego out, one connection via San Diego back). Checked 2026-10-28T21:07:08Z.
• 2027-09-11–2027-09-18 (return 7 days later): $339.79 American Airlines (out STS–DEN 6459 / 1638 16:21–21:58, back DEN–STS 2602 / 6459 12:17–15:50; one connection via Phoenix out, one connection via Phoenix back). Checked 2026-10-28T23:50:20Z.

How we checked

On Oct 28, 2026, Axel priced round trips from STS to DEN for one adult in economy: 1 Saturday departure with returns 14 days later, 12 Saturday and 2 Tuesday departures with returns 7 days later, 1 Wednesday, 1 Friday and 1 Thursday departures with returns 4 days later and 5 Friday and 1 Thursday departures with returns 3 days later, November 2026 to September 2027. Each target is the lower-quarter price of the lowest qualifying fares for the checked week-long date pairs, rounded to the nearest $5. The midpoint is their median; neither is a historical market average. Shorter travel days means same-day arrivals · ≤1 stop · ≤5h out / ≤5h back. Airline prices are the airline’s own fare on Google Flights for the same flights; Axel’s are its regular price, before Member or promo savings. This is a snapshot, not a forecast. Check bags and change rules on your fare.

Airports covered: STS → DEN. Each example names its actual airports.

Check current prices for your dates and travelers

Other available fares

Flights by travel date

STS–DEN · 2026-11-13–2026-11-20 · 4 adults

Round-trip total · Economy · USD. Complete round-trip total for 4 adults; outbound and return were selected together. Check again for current availability.

• $1,369.63 · Alaska Airlines 2224 / 3155 · 06:00–19:19 local · 1 stop (SAN) · 12h 19m. Return: Delta Air Lines 2544 / 3541 · DEN–STS · November 20, 2026 · 05:25–10:43 local · 1 stop(s) (SLC) · 378 minutes. Airline fare: $1,444.

• $1,474.64 · Alaska Airlines 2224 / 3155 · 06:00–19:19 local · 1 stop (SAN) · 12h 19m. Return: Alaska Airlines 3059 / 3065 · DEN–STS · November 20, 2026 · 07:24–23:31 local · 1 stop(s) (SAN) · 1027 minutes. Airline fare: $1,558.

Captured example · October 28, 2026 at 10:39 PM UTC

STS–DEN · 2026-11-13–2026-11-20 · 4 adults

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $1,368.95 · Alaska Airlines 2224 / 3155 · 06:00–19:19 local · 1 stop (SAN) · 12h 19m. Airline fare: $1,441.

• $1,442.10 · Southwest Airlines 3727 / 3702 · 16:10–23:25 local · 1 stop (SAN) · 6h 15m. Airline fare: $1,518.

• $1,672.65 · Delta Air Lines 3541 / 1623 · 11:29–17:10 local · 1 stop (SLC) · 4h 41m. Airline fare: $1,770.

Captured example · October 28, 2026 at 10:38 PM UTC

STS–DEN · 2026-11-21–2026-11-28 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $330.15 · Southwest Airlines 4209 / 3702 · 17:10–00:40 (November 22, 2026) local · 1 stop (SAN) · 6h 30m. Airline fare: $349.

• $428.45 · American Airlines 3900 / 1648 · 07:20–15:07 local · 1 stop (PHX) · 6h 47m. Airline fare: $451.

Captured example · October 28, 2026 at 09:43 PM UTC

STS–DEN · 2026-11-11–2026-11-15 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $400.79 · Alaska Airlines 3164 / 3155 · 13:26–19:19 local · 1 stop (SAN) · 4h 53m. Airline fare: $423.

• $449.35 · American Airlines 3485 / 1762 · 13:24–19:22 local · 1 stop (PHX) · 4h 58m. Airline fare: $473.

• $449.35 · Delta Air Lines 3533 / 1667 · 16:47–23:09 local · 1 stop (SLC) · 5h 22m. Airline fare: $473.

Captured example · October 28, 2026 at 09:33 PM UTC

STS–DEN · 2026-11-10–2026-11-17 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $377.70 · Alaska Airlines 3164 / 3155 · 13:26–19:19 local · 1 stop (SAN) · 4h 53m. Airline fare: $398.

• $379.94 · American Airlines 3485 / 1762 · 13:24–19:20 local · 1 stop (PHX) · 4h 56m. Airline fare: $401.

• $449.35 · Delta Air Lines 3541 / 1623 · 11:29–17:10 local · 1 stop (SLC) · 4h 41m. Airline fare: $473.

Captured example · October 28, 2026 at 06:48 PM UTC

STS–DEN · 2026-11-13–2026-11-15 · 6 adults

Round-trip total · Economy · USD. Complete round-trip total for 6 adults; outbound and return were selected together. Check again for current availability.

• $2,401.91 · Alaska Airlines 3046 / 1342 · 20:20–12:57 (November 14, 2026) local · 1 stop (SAN) · 15h 37m. Return: Alaska Airlines 3155 / 2206 · DEN–STS · November 15, 2026 · 19:59–22:38 (November 16, 2026) local · 1 stop(s) (SAN) · 1659 minutes. Airline fare: $2,535.

• $4,840.77 · Alaska Airlines 3046 / 1342 · 20:20–12:57 (November 14, 2026) local · 1 stop (SAN) · 15h 37m. Return: Alaska Airlines 714 / 3263 · DEN–STS · November 15, 2026 · 14:56–19:28 local · 1 stop(s) (PDX) · 332 minutes. Airline fare: $5,109.

Captured example · October 28, 2026 at 09:39 PM UTC

STS–DEN · 2026-11-13–2026-11-15 · 6 adults

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $2,401.91 · Alaska Airlines 3046 / 1342 · 20:20–12:57 (November 14, 2026) local · 1 stop (SAN) · 15h 37m. Airline fare: $2,535.

• $2,681.91 · Delta Air Lines 3533 / 1667 · 16:47–23:09 local · 1 stop (SLC) · 5h 22m. Airline fare: $2,835.

• $3,233.42 · Southwest Airlines 4158 / 864 · 11:10–16:35 local · 1 stop (BUR) · 4h 25m. Airline fare: $3,418.

Captured example · October 28, 2026 at 09:39 PM UTC

STS–DEN · 2026-12-03–2026-12-06 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $241.99 · Alaska Airlines 3072 / 684 · 08:00–14:24 local · 1 stop (PDX) · 5h 24m. Airline fare: $255.

• $266.91 · Southwest Airlines 4209 / 1659 · 06:45–15:55 local · 1 stop (SAN) · 8h 10m. Airline fare: $282.

• $276.52 · Delta Air Lines 3533 / 1667 · 16:50–23:14 local · 1 stop (SLC) · 5h 24m. Airline fare: $292.

Captured example · October 28, 2026 at 09:53 PM UTC

STS–DEN · 2026-12-19–2026-12-26 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $342.09 · Alaska Airlines 3046 / 3060 · 19:13–23:55 (December 20, 2026) local · 1 stop (SAN) · 27h 42m. Airline fare: $362.

• $352.48 · Delta Air Lines 3533 / 1667 · 16:50–22:37 local · 1 stop (SLC) · 4h 47m. Airline fare: $373.

• $359.86 · Southwest Airlines 482 · 14:20–17:55 local · Nonstop · 2h 35m. Airline fare: $380.

Captured example · October 28, 2026 at 08:25 PM UTC

STS–DEN · 2026-12-08–2026-12-15 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $234.03 · American Airlines 3407 / 1762 · 13:18–19:29 local · 1 stop (PHX) · 5h 11m. Airline fare: $247.

• $234.03 · Southwest Airlines 2365 / 1796 · 15:00–21:20 local · 1 stop (LAS) · 5h 20m. Airline fare: $247.

• $234.03 · Delta Air Lines 3533 / 1667 · 16:50–23:14 local · 1 stop (SLC) · 5h 24m. Airline fare: $247.

Captured example · October 28, 2026 at 06:48 PM UTC

STS–DEN · 2027-01-16–2027-01-23 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $248.53 · Alaska Airlines 2034 / 1342 · 19:20–12:47 (January 17, 2027) local · 1 stop (SAN) · 16h 27m. Airline fare: $263.

• $262.87 · Southwest Airlines 3083 · 12:10–15:45 local · Nonstop · 2h 35m. Airline fare: $277.

• $282.15 · American Airlines 3900 / 3906 · 08:00–15:14 local · 1 stop (PHX) · 6h 14m. Airline fare: $297.

Captured example · October 28, 2026 at 10:20 PM UTC

STS–DEN · 2027-01-09–2027-01-23 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $248.53 · Alaska Airlines 3013 / 3060 · 14:12–22:15 local · 1 stop (SAN) · 7h 3m. Airline fare: $263.

• $262.87 · Southwest Airlines 3083 · 12:10–15:45 local · Nonstop · 2h 35m. Airline fare: $277.

Captured example · October 28, 2026 at 10:14 PM UTC

STS–DEN · 2027-01-15–2027-01-18 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $262.87 · Southwest Airlines 1109 · 14:50–18:20 local · Nonstop · 2h 30m. Airline fare: $277.

• $282.15 · American Airlines 3900 / 3906 · 08:32–15:14 local · 1 stop (PHX) · 5h 42m. Airline fare: $297.

Captured example · October 28, 2026 at 08:40 PM UTC

STS–DEN · 2027-02-13–2027-02-20 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $262.87 · Southwest Airlines 573 · 13:25–16:55 local · Nonstop · 2h 30m. Airline fare: $277.

Captured example · October 28, 2026 at 10:39 PM UTC

STS–DEN · 2027-02-12–2027-02-16 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $272.50 · Southwest Airlines 1109 · 14:50–18:20 local · Nonstop · 2h 30m. Airline fare: $287.

Captured example · October 28, 2026 at 10:34 PM UTC

STS–DEN · 2027-02-12–2027-02-15 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $306.20 · Southwest Airlines 1109 · 14:50–18:20 local · Nonstop · 2h 30m. Airline fare: $323.

Captured example · October 28, 2026 at 10:34 PM UTC

STS–DEN · 2027-03-25–2027-03-29 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $424.52 · Alaska Airlines 3386 / 3321 · 08:00–14:09 local · 1 stop (PDX) · 5h 9m. Airline fare: $449.

• $482.78 · Southwest Airlines 4182 · 11:00–14:35 local · Nonstop · 2h 35m. Airline fare: $509.

Captured example · October 28, 2026 at 10:50 PM UTC

STS–DEN · 2027-03-06–2027-03-13 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $403.72 · Alaska Airlines 3365 / 3021 · 15:18–23:51 local · 1 stop (SAN) · 7h 33m. Airline fare: $427.

• $424.52 · Delta Air Lines 3541 / 1586 · 12:39–19:10 local · 1 stop (SLC) · 5h 31m. Airline fare: $449.

• $482.78 · Southwest Airlines 573 · 13:25–16:55 local · Nonstop · 2h 30m. Airline fare: $509.

Captured example · October 28, 2026 at 10:44 PM UTC

STS–DEN · 2027-03-13–2027-03-20 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $404.46 · American Airlines 4115 / 2601 · 16:15–21:56 local · 1 stop (PHX) · 4h 41m. Airline fare: $428.

• $423.80 · Alaska Airlines 3365 / 3021 · 15:18–23:51 local · 1 stop (SAN) · 7h 33m. Airline fare: $448.

• $482.78 · Southwest Airlines 859 · 13:55–17:25 local · Nonstop · 2h 30m. Airline fare: $509.

Captured example · October 28, 2026 at 09:00 PM UTC

STS–DEN · 2027-04-10–2027-04-17 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $335.17 · Alaska Airlines 3001 / 3071 · 06:45–18:33 local · 1 stop (SAN) · 10h 48m. Airline fare: $353.

• $379.94 · American Airlines 6437 / 3221 · 16:23–21:57 local · 1 stop (PHX) · 4h 34m. Airline fare: $401.

• $424.52 · Southwest Airlines 369 · 12:40–16:25 local · Nonstop · 2h 45m. Airline fare: $449.

Captured example · October 28, 2026 at 10:56 PM UTC

STS–DEN · 2027-05-28–2027-05-31 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $424.52 · Delta Air Lines 3541 / 1586 · 12:39–19:10 local · 1 stop (SLC) · 5h 31m. Airline fare: $449.

• $424.52 · Alaska Airlines 2032 / 1384 · 18:47–10:56 (May 29, 2027) local · 1 stop (PDX) · 15h 9m. Airline fare: $449.

• $502.28 · Southwest Airlines 4111 · 06:00–09:40 local · Nonstop · 2h 40m. Airline fare: $529.

Captured example · October 28, 2026 at 11:07 PM UTC

STS–DEN · 2027-05-08–2027-05-15 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $359.86 · American Airlines 3558 / 3144 · 09:00–15:09 local · 1 stop (PHX) · 5h 9m. Airline fare: $380.

• $381.43 · Alaska Airlines 3365 / 3202 · 12:10–18:33 local · 1 stop (SAN) · 5h 23m. Airline fare: $403.

• $402.99 · Southwest Airlines 369 · 12:40–16:25 local · Nonstop · 2h 45m. Airline fare: $426.

Captured example · October 28, 2026 at 11:02 PM UTC

STS–DEN · 2027-06-12–2027-06-19 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $359.86 · American Airlines 6458 / 2225 · 16:20–00:34 (June 13, 2027) local · 1 stop (PHX) · 7h 14m. Airline fare: $380.

• $424.52 · Southwest Airlines 4723 · 06:05–09:30 local · Nonstop · 2h 25m. Airline fare: $449.

• $424.52 · Alaska Airlines 3365 / 3202 · 12:10–18:33 local · 1 stop (SAN) · 5h 23m. Airline fare: $449.

Captured example · October 28, 2026 at 11:21 PM UTC

STS–DEN · 2027-07-10–2027-07-17 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $359.86 · American Airlines 6458 / 2225 · 16:20–00:37 (July 11, 2027) local · 1 stop (PHX) · 7h 17m. Airline fare: $380.

• $424.52 · Southwest Airlines 4723 · 06:05–09:30 local · Nonstop · 2h 25m. Airline fare: $449.

• $424.52 · Alaska Airlines 3365 / 3202 · 12:10–18:33 local · 1 stop (SAN) · 5h 23m. Airline fare: $449.

Captured example · October 28, 2026 at 11:30 PM UTC

STS–DEN · 2027-07-02–2027-07-05 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $424.52 · Delta Air Lines 3541 / 1586 · 12:39–19:10 local · 1 stop (SLC) · 5h 31m. Airline fare: $449.

• $482.78 · Southwest Airlines 4723 · 06:00–09:25 local · Nonstop · 2h 25m. Airline fare: $509.

Captured example · October 28, 2026 at 11:26 PM UTC

STS–DEN · 2027-08-07–2027-08-14 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $339.79 · American Airlines 6458 / 2225 · 16:20–00:37 (August 8, 2027) local · 1 stop (PHX) · 7h 17m. Airline fare: $359.

• $424.52 · Alaska Airlines 3365 / 3202 · 12:10–18:33 local · 1 stop (SAN) · 5h 23m. Airline fare: $449.

• $424.52 · Delta Air Lines 3541 / 1586 · 12:39–19:10 local · 1 stop (SLC) · 5h 31m. Airline fare: $449.

Captured example · October 28, 2026 at 11:37 PM UTC

STS–DEN · 2027-09-11–2027-09-18 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $339.79 · American Airlines 6459 / 1638 · 16:21–21:58 local · 1 stop (PHX) · 4h 37m. Airline fare: $359.

• $424.52 · Alaska Airlines 3365 / 3202 · 12:10–18:33 local · 1 stop (SAN) · 5h 23m. Airline fare: $449.

• $424.52 · Delta Air Lines 3541 / 1586 · 12:39–19:10 local · 1 stop (SLC) · 5h 31m. Airline fare: $449.

Captured example · October 28, 2026 at 11:50 PM UTC

STS–DEN · 2027-09-03–2027-09-06 · 1 adult

Round-trip starting price · Economy · USD. Round-trip starting prices; outbound options shown. The final total depends on return selection and availability.

• $424.52 · Alaska Airlines 3001 / 3202 · 06:45–18:33 local · 1 stop (SAN) · 10h 48m. Airline fare: $449.

• $443.90 · Alaska Airlines 3365 / 3202 · 12:10–18:33 local · 1 stop (SAN) · 5h 23m. Airline fare: $469.

• $486.24 · Delta Air Lines 3541 / 1586 · 12:39–19:10 local · 1 stop (SLC) · 5h 31m. Airline fare: $514.

Captured example · October 28, 2026 at 09:07 PM UTC

Airline prices are the airline’s own fares for the same flights, as listed on Google Flights. Airline checkout totals were not separately verified.

Airline ratings: Alaska Airlines 7.6/10 · Southwest Airlines 6.9/10 · American Airlines 6.2/10 · Delta Air Lines 7.5/10. Every airline rated.

Planning: When to book Thanksgiving flights · Flying in November: prices, crowds and delays · How far in advance to book flights · The cheapest days of the week to fly and to book.

Trip ideas from Santa Rosa with Denver (DEN)

• Cheapest places to fly from Santa Rosa in November: fly Nov 7 – Nov 14, 2026
• Veterans Day weekend trips from Santa Rosa: fly Nov 11 – Nov 15, 2026
• Best places to fly from Santa Rosa for Thanksgiving: fly Nov 21 – Nov 28, 2026
• Cheapest places to fly from Santa Rosa for 4 days: fly Dec 3 – Dec 6, 2026
• Cheapest places to fly from Santa Rosa in December: fly Dec 5 – Dec 12, 2026
• Best places to fly from Santa Rosa for Christmas: fly Dec 19 – Dec 26, 2026
• Winter break trips from Santa Rosa: fly Dec 19 – Dec 26, 2026
• Cheapest places to fly from Santa Rosa for two weeks: fly Jan 9 – Jan 23, 2027
• Best places to fly from Santa Rosa for MLK weekend: fly Jan 15 – Jan 18, 2027
• MLK weekend getaways from Santa Rosa: fly Jan 15 – Jan 18, 2027
• Cheapest places to fly from Santa Rosa in January: fly Jan 16 – Jan 23, 2027
• Best places to fly from Santa Rosa for Presidents' Day weekend: fly Feb 12 – Feb 16, 2027
• Presidents' Day weekend getaways from Santa Rosa: fly Feb 12 – Feb 15, 2027
• Cheapest places to fly from Santa Rosa in February: fly Feb 13 – Feb 20, 2027
• Cheapest places to fly from Santa Rosa in March: fly Mar 6 – Mar 13, 2027
• Best places to fly from Santa Rosa for spring break: fly Mar 13 – Mar 20, 2027
• Spring break trips from Santa Rosa: fly Mar 13 – Mar 20, 2027
• Best places to fly from Santa Rosa for Easter weekend: fly Mar 25 – Mar 29, 2027
• Cheapest places to fly from Santa Rosa in April: fly Apr 10 – Apr 17, 2027
• Cheapest places to fly from Santa Rosa in May: fly May 8 – May 15, 2027
• Best places to fly from Santa Rosa for Memorial Day weekend: fly May 28 – May 31, 2027
• Cheapest places to fly from Santa Rosa in June: fly Jun 12 – Jun 19, 2027
• Best places to fly from Santa Rosa for July 4th weekend: fly Jul 2 – Jul 5, 2027
• Cheapest places to fly from Santa Rosa in July: fly Jul 10 – Jul 17, 2027
• Cheapest places to fly from Santa Rosa in August: fly Aug 7 – Aug 14, 2027
• Best places to fly from Santa Rosa for Labor Day weekend: fly Sep 3 – Sep 6, 2027
• Labor Day weekend trips from Santa Rosa: fly Sep 3 – Sep 6, 2027
• Cheapest places to fly from Santa Rosa in September: fly Sep 11 – Sep 18, 2027
• Bachelorette and bachelor party trips from Santa Rosa, priced for 6
• Cheapest places to fly from Santa Rosa for a week
• Group trips priced for 4 from Santa Rosa
• National park trips from Santa Rosa
• The best US cities to visit from Santa Rosa

Keep exploring

• Change destination

• Choose any travel dates

• Change travelers or cabin

Source: https://helloaxel.com/en/flights/from-santa-rosa-sts-to-denver-den

For AI assistants

• This page: Santa Rosa to Denver (DEN) flight deals. Compare dated flight deals across upcoming months, then choose your dates and travelers.
• Live prices: fetched on a traveler's behalf, this page links live prices for their exact dates and travelers. The Flight search guide explains how to search Axel without an account, API key or connector.