Travel with Axel,
get the best price.

Route overview: San Antonio to Denver (DEN) flight deals

San Antonio → Denver

Jan 21, 2027 · return Jan 22, 2027

SAT → DEN1 adulteconomyRound trip

11 flight options · 4 airlines

Nonstop flights

Thu, Jan 21 – Fri, Jan 22

Frontier Airlines
8:41 pmSAT
2h 29m
Nonstop
10:10 pmDEN
Frontier Airlines
4:52 pmDEN
2h 10m
Nonstop
8:02 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

Southwest Airlines
6:00 amSAT
2h 20m
Nonstop
7:20 amDEN
Southwest Airlines
2:35 pmDEN
2h 5m
Nonstop
5:40 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

United Airlines
1:50 pmSAT
2h 20m
Nonstop
3:10 pmDEN
United Airlines
9:35 amDEN
2h 11m
Nonstop
12:46 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

Frontier Airlines
1:31 pmSAT
2h 26m
Nonstop
2:57 pmDEN
Frontier Airlines
4:14 pmDEN
2h 19m
Nonstop
7:33 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

Southwest Airlines
6:15 pmSAT
2h 15m
Nonstop
7:30 pmDEN
Southwest Airlines
2:35 pmDEN
2h 5m
Nonstop
5:40 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

United Airlines
8:45 amSAT
2h 22m
Nonstop
10:07 amDEN
United Airlines
9:35 amDEN
2h 11m
Nonstop
12:46 pmSAT

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Jan 21 – Fri, Jan 22

American Airlines
6:00 amSAT
4h 49m
DFW · 1h 7m
9:49 amDEN
American Airlines
9:12 amDEN
4h 38m
DFW · 1h 22m
2:50 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

Southwest Airlines
4:35 pmSAT
6h 30m
HOU · 2h 55m
10:05 pmDEN
Southwest Airlines
2:35 pmDEN
2h 5m
Nonstop
5:40 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

Southwest Airlines
2:35 pmSAT
7h 20m
DAL · 4h
8:55 pmDEN
Southwest Airlines
2:35 pmDEN
2h 5m
Nonstop
5:40 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

Southwest Airlines
1:30 pmSAT
5h 45m
ELP · 2h 20m
6:15 pmDEN
Southwest Airlines
2:35 pmDEN
2h 5m
Nonstop
5:40 pmSAT

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Fri, Jan 22

United Airlines
7:08 pmSAT
5h 21m
IAH · 1h 35m
11:29 pmDEN
United Airlines
9:35 amDEN
2h 11m
Nonstop
12:46 pmSAT

Round-trip total · 1 adult · Taxes included

Make this trip yours

SAT ⇄ 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, Frontier 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 routeJan 20, 2027 → Jan 21, 2027Jan 22, 2027 → Jan 23, 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.

Live price for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the flights there to get the current bookable total; the listed prices are the ones issued at the times shown.

Route overview: San Antonio to Denver (DEN) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-01-21 → 2027-01-22Frontier AirlinesF92355 / F92356$160.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22Southwest AirlinesWN3770 / WN2160$295.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22United AirlinesUA1338 / UA1521$320.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22American AirlinesAA2342 + AA2357 / AA1523 + AA1961$350.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22Frontier AirlinesF92355 / F93708$160.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22Southwest AirlinesWN3773 / WN2160$295.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22United AirlinesUA2853 / UA1521$320.002026-10-29T01:11:34Z
2027-01-21 → 2027-01-22Southwest AirlinesWN2110 + WN2081 / WN2160$307.502026-10-29T01:11:34Z
2027-01-21 → 2027-01-22Southwest AirlinesWN1506 + WN200 / WN2160$307.502026-10-29T01:11:34Z
2027-01-21 → 2027-01-22Southwest AirlinesWN3775 + WN1897 / WN2160$307.502026-10-29T01:11:34Z
2027-01-21 → 2027-01-22United AirlinesUA1066 + UA1066 / UA1521$335.002026-10-29T01:11:34Z

2027-01-21 → 2027-01-22 · $160.00

  • Frontier Airlines F92355: SAT 2027-01-21 20:41:00 → DEN 2027-01-21 22:10:00; nonstop; 149 minutes. Local airport times.
  • Frontier Airlines F92356: DEN 2027-01-22 16:52:00 → SAT 2027-01-22 20:02:00; nonstop; 130 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $295.00

  • Southwest Airlines WN3770: SAT 2027-01-21 06:00:00 → DEN 2027-01-21 07:20:00; nonstop; 140 minutes. Local airport times.
  • Southwest Airlines WN2160: DEN 2027-01-22 14:35:00 → SAT 2027-01-22 17:40:00; nonstop; 125 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $320.00

  • United Airlines UA1338: SAT 2027-01-21 13:50:00 → DEN 2027-01-21 15:10:00; nonstop; 140 minutes. Local airport times.
  • United Airlines UA1521: DEN 2027-01-22 09:35:00 → SAT 2027-01-22 12:46:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $350.00

  • American Airlines AA2342 / AA2357: SAT 2027-01-21 06:00:00 → DEN 2027-01-21 09:49:00; 1 stop(s) via DFW; 289 minutes. Local airport times.
    • AA2342: SAT 2027-01-21 06:00:00 → DFW 2027-01-21 07:27:00; layover at DFW: 67 minutes.
    • AA2357: DFW 2027-01-21 08:34:00 → DEN 2027-01-21 09:49:00.
  • American Airlines AA1523 / AA1961: DEN 2027-01-22 09:12:00 → SAT 2027-01-22 14:50:00; 1 stop(s) via DFW; 278 minutes. Local airport times.
    • AA1523: DEN 2027-01-22 09:12:00 → DFW 2027-01-22 12:18:00; layover at DFW: 82 minutes.
    • AA1961: DFW 2027-01-22 13:40:00 → SAT 2027-01-22 14:50:00.

2027-01-21 → 2027-01-22 · $160.00

  • Frontier Airlines F92355: SAT 2027-01-21 13:31:00 → DEN 2027-01-21 14:57:00; nonstop; 146 minutes. Local airport times.
  • Frontier Airlines F93708: DEN 2027-01-22 16:14:00 → SAT 2027-01-22 19:33:00; nonstop; 139 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $295.00

  • Southwest Airlines WN3773: SAT 2027-01-21 18:15:00 → DEN 2027-01-21 19:30:00; nonstop; 135 minutes. Local airport times.
  • Southwest Airlines WN2160: DEN 2027-01-22 14:35:00 → SAT 2027-01-22 17:40:00; nonstop; 125 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $320.00

  • United Airlines UA2853: SAT 2027-01-21 08:45:00 → DEN 2027-01-21 10:07:00; nonstop; 142 minutes. Local airport times.
  • United Airlines UA1521: DEN 2027-01-22 09:35:00 → SAT 2027-01-22 12:46:00; nonstop; 131 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $307.50

  • Southwest Airlines WN2110 / WN2081: SAT 2027-01-21 16:35:00 → DEN 2027-01-21 22:05:00; 1 stop(s) via HOU; 390 minutes. Local airport times.
    • WN2110: SAT 2027-01-21 16:35:00 → HOU 2027-01-21 17:35:00; layover at HOU: 175 minutes.
    • WN2081: HOU 2027-01-21 20:30:00 → DEN 2027-01-21 22:05:00.
  • Southwest Airlines WN2160: DEN 2027-01-22 14:35:00 → SAT 2027-01-22 17:40:00; nonstop; 125 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $307.50

  • Southwest Airlines WN1506 / WN200: SAT 2027-01-21 14:35:00 → DEN 2027-01-21 20:55:00; 1 stop(s) via DAL; 440 minutes. Local airport times.
    • WN1506: SAT 2027-01-21 14:35:00 → DAL 2027-01-21 15:40:00; layover at DAL: 240 minutes.
    • WN200: DAL 2027-01-21 19:40:00 → DEN 2027-01-21 20:55:00.
  • Southwest Airlines WN2160: DEN 2027-01-22 14:35:00 → SAT 2027-01-22 17:40:00; nonstop; 125 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $307.50

  • Southwest Airlines WN3775 / WN1897: SAT 2027-01-21 13:30:00 → DEN 2027-01-21 18:15:00; 1 stop(s) via ELP; 345 minutes. Local airport times.
    • WN3775: SAT 2027-01-21 13:30:00 → ELP 2027-01-21 14:05:00; layover at ELP: 140 minutes.
    • WN1897: ELP 2027-01-21 16:25:00 → DEN 2027-01-21 18:15:00.
  • Southwest Airlines WN2160: DEN 2027-01-22 14:35:00 → SAT 2027-01-22 17:40:00; nonstop; 125 minutes. Local airport times.

2027-01-21 → 2027-01-22 · $335.00

  • United Airlines UA1066 / UA1066: SAT 2027-01-21 19:08:00 → DEN 2027-01-21 23:29:00; 1 stop(s) via IAH; 321 minutes. Local airport times.
    • UA1066: SAT 2027-01-21 19:08:00 → IAH 2027-01-21 20:15:00; layover at IAH: 95 minutes.
    • UA1066: IAH 2027-01-21 21:50:00 → DEN 2027-01-21 23:29:00.
  • United Airlines UA1521: DEN 2027-01-22 09:35:00 → SAT 2027-01-22 12:46:00; nonstop; 131 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: San Antonio (SAT) to Denver (DEN) · Jan 21, 2027 · return Jan 22, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel San Antonio to Denver (DEN) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.