Travel with Axel,
get the best price.

Route overview: Santa Rosa to Denver (DEN) flight deals

Santa Rosa → Denver

Dec 30, 2026 · return Jan 2, 2027

STS → DEN1 adulteconomyRound trip

6 flight options · 4 airlines

One-stop flights

Wed, Dec 30 – Sat, Jan 2

Southwest Airlines
5:10 pmSTS
6h 30m
SAN · 2h 30m
12:40 am+1DEN
Southwest Airlines
9:20 amDEN
2h 45m
Nonstop
11:05 amSTS

Round-trip total · 1 adult · Taxes included

Wed, Dec 30 – Sat, Jan 2

Alaska Airlines
12:01 pmSTS
5h 12m
LAX · 1h 8m
6:13 pmDEN
Southwest Airlines
9:20 amDEN
2h 45m
Nonstop
11:05 amSTS

Round-trip total · 1 adult · Taxes included

Wed, Dec 30 – Sat, Jan 2

American Airlines
1:18 pmSTS
5h 11m
PHX · 1h 8m
7:29 pmDEN
American Airlines
6:46 pmDEN
5h 35m
LAX · 1h 9m
11:21 pmSTS

Round-trip total · 1 adult · Taxes included

Wed, Dec 30 – Sat, Jan 2

Delta Air Lines
11:27 amSTS
4h 52m
SLC · 1h 20m
5:19 pmDEN
Delta Air Lines
6:18 amDEN
5h 25m
SLC · 1h 40m
10:43 amSTS

Round-trip total · 1 adult · Taxes included

Wed, Dec 30 – Sat, Jan 2

Southwest Airlines
12:50 pmSTS
5h 50m
BUR · 2h 5m
7:40 pmDEN
Southwest Airlines
9:20 amDEN
2h 45m
Nonstop
11:05 amSTS

Round-trip total · 1 adult · Taxes included

Wed, Dec 30 – Sat, Jan 2

Alaska Airlines
11:23 amSTS
6h 56m
SAN · 2h 44m
7:19 pmDEN
Southwest Airlines
9:20 amDEN
2h 45m
Nonstop
11:05 amSTS

Round-trip total · 1 adult · Taxes included

Make this trip yours

STS ⇄ DEN

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Southwest Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

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. How Axel works · About

Explore this route

All dates for this routeDec 29, 2026 → Jan 1, 2027Dec 31, 2026 → Jan 3, 2027
For AI assistants: every fare, every link, instructions

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

Route overview: Santa Rosa to Denver (DEN) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-30 → 2027-01-02Southwest AirlinesWN4209 + WN3702 / WN1848$473.752026-10-29T01:29:23Z
2026-12-30 → 2027-01-02Alaska Airlines / Southwest AirlinesAS2119 + AA6281 / WN1848$524.382026-10-29T01:29:23Z
2026-12-30 → 2027-01-02American AirlinesAA3407 + AA1762 / AA6281 + AS3091$618.052026-10-29T01:29:23Z
2026-12-30 → 2027-01-02Delta Air LinesDL3541 + DL1623 / DL2544 + DL3541$657.502026-10-29T01:29:23Z
2026-12-30 → 2027-01-02Southwest AirlinesWN3027 + WN865 / WN1848$473.752026-10-29T01:29:23Z
2026-12-30 → 2027-01-02Alaska Airlines / Southwest AirlinesAS2056 + AS3155 / WN1848$524.382026-10-29T01:29:23Z

2026-12-30 → 2027-01-02 · $473.75

  • Southwest Airlines WN4209 / WN3702: STS 2026-12-30 17:10:00 → DEN 2026-12-31 00:40:00; 1 stop(s) via SAN; 390 minutes. Local airport times.
    • WN4209: STS 2026-12-30 17:10:00 → SAN 2026-12-30 18:45:00; layover at SAN: 150 minutes.
    • WN3702: SAN 2026-12-30 21:15:00 → DEN 2026-12-31 00:40:00.
  • Southwest Airlines WN1848: DEN 2027-01-02 09:20:00 → STS 2027-01-02 11:05:00; nonstop; 165 minutes. Local airport times.

2026-12-30 → 2027-01-02 · $524.38

  • Alaska Airlines AS2119 / AA6281: STS 2026-12-30 12:01:00 → DEN 2026-12-30 18:13:00; 1 stop(s) via LAX; 312 minutes. Local airport times.
    • AS2119: STS 2026-12-30 12:01:00 → LAX 2026-12-30 13:36:00; layover at LAX: 68 minutes.
    • AA6281: LAX 2026-12-30 14:44:00 → DEN 2026-12-30 18:13:00.
  • Southwest Airlines WN1848: DEN 2027-01-02 09:20:00 → STS 2027-01-02 11:05:00; nonstop; 165 minutes. Local airport times.

2026-12-30 → 2027-01-02 · $618.05

  • American Airlines AA3407 / AA1762: STS 2026-12-30 13:18:00 → DEN 2026-12-30 19:29:00; 1 stop(s) via PHX; 311 minutes. Local airport times.
    • AA3407: STS 2026-12-30 13:18:00 → PHX 2026-12-30 16:27:00; layover at PHX: 68 minutes.
    • AA1762: PHX 2026-12-30 17:35:00 → DEN 2026-12-30 19:29:00.
  • American Airlines AA6281 / AS3091: DEN 2027-01-02 18:46:00 → STS 2027-01-02 23:21:00; 1 stop(s) via LAX; 335 minutes. Local airport times.
    • AA6281: DEN 2027-01-02 18:46:00 → LAX 2027-01-02 20:30:00; layover at LAX: 69 minutes.
    • AS3091: LAX 2027-01-02 21:39:00 → STS 2027-01-02 23:21:00.

2026-12-30 → 2027-01-02 · $657.50

  • Delta Air Lines DL3541 / DL1623: STS 2026-12-30 11:27:00 → DEN 2026-12-30 17:19:00; 1 stop(s) via SLC; 292 minutes. Local airport times.
    • DL3541: STS 2026-12-30 11:27:00 → SLC 2026-12-30 14:29:00; layover at SLC: 80 minutes.
    • DL1623: SLC 2026-12-30 15:49:00 → DEN 2026-12-30 17:19:00.
  • Delta Air Lines DL2544 / DL3541: DEN 2027-01-02 06:18:00 → STS 2027-01-02 10:43:00; 1 stop(s) via SLC; 325 minutes. Local airport times.
    • DL2544: DEN 2027-01-02 06:18:00 → SLC 2027-01-02 07:56:00; layover at SLC: 100 minutes.
    • DL3541: SLC 2027-01-02 09:36:00 → STS 2027-01-02 10:43:00.

2026-12-30 → 2027-01-02 · $473.75

  • Southwest Airlines WN3027 / WN865: STS 2026-12-30 12:50:00 → DEN 2026-12-30 19:40:00; 1 stop(s) via BUR; 350 minutes. Local airport times.
    • WN3027: STS 2026-12-30 12:50:00 → BUR 2026-12-30 14:15:00; layover at BUR: 125 minutes.
    • WN865: BUR 2026-12-30 16:20:00 → DEN 2026-12-30 19:40:00.
  • Southwest Airlines WN1848: DEN 2027-01-02 09:20:00 → STS 2027-01-02 11:05:00; nonstop; 165 minutes. Local airport times.

2026-12-30 → 2027-01-02 · $524.38

  • Alaska Airlines AS2056 / AS3155: STS 2026-12-30 11:23:00 → DEN 2026-12-30 19:19:00; 1 stop(s) via SAN; 416 minutes. Local airport times.
    • AS2056: STS 2026-12-30 11:23:00 → SAN 2026-12-30 13:01:00; layover at SAN: 164 minutes.
    • AS3155: SAN 2026-12-30 15:45:00 → DEN 2026-12-30 19:19:00.
  • Southwest Airlines WN1848: DEN 2027-01-02 09:20:00 → STS 2027-01-02 11:05:00; nonstop; 165 minutes. Local airport times.

Explore this route