Travel with Axel,
get the best price.

Saint Louis → Austin

Dec 4, 2026 · return Dec 18, 2026

STL → AUS1 adulteconomyRound trip

8 flight options · 3 airlines

Nonstop flights

Fri, Dec 4 – Fri, Dec 18

Southwest Airlines
2:45 pmSTL
2h 5m
Nonstop
4:50 pmAUS
Southwest Airlines
7:35 amAUS
2h
Nonstop
9:35 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Fri, Dec 18

Southwest Airlines
8:25 pmSTL
2h 10m
Nonstop
10:35 pmAUS
Southwest Airlines
7:35 amAUS
2h
Nonstop
9:35 amSTL

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Dec 4 – Fri, Dec 18

American Airlines
6:44 pmSTL
4h 15m
DFW · 1h 9m
10:59 pmAUS
American Airlines
3:00 pmAUS
4h 36m
DFW · 1h 40m
7:36 pmSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Fri, Dec 18

United Airlines
6:00 amSTL
5h 13m
IAH · 1h 41m
11:13 amAUS
United Airlines
5:15 amAUS
4h 34m
IAH · 1h 12m
9:49 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Fri, Dec 18

Southwest Airlines
8:00 amSTL
4h 40m
MCI · 1h 30m
12:40 pmAUS
Southwest Airlines
7:35 amAUS
2h
Nonstop
9:35 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Fri, Dec 18

Southwest Airlines
7:10 pmSTL
4h 15m
DAL · 1h 25m
11:25 pmAUS
Southwest Airlines
7:35 amAUS
2h
Nonstop
9:35 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Fri, Dec 18

Southwest Airlines
5:05 amSTL
5h 35m
HOU · 2h 35m
10:40 amAUS
Southwest Airlines
7:35 amAUS
2h
Nonstop
9:35 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 4 – Fri, Dec 18

Southwest Airlines
10:55 amSTL
5h 40m
MDW · 1h 50m
4:35 pmAUS
Southwest Airlines
7:35 amAUS
2h
Nonstop
9:35 amSTL

Round-trip total · 1 adult · Taxes included

Make this trip yours

STL ⇄ AUS

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

More dates

All dates for this routeNov 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 2026 · One way
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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-04 → 2026-12-18Southwest AirlinesWN4913 / WN436$290.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18American AirlinesAA2269 + AA2707 / AA3885 + AA2246$320.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18United AirlinesUA1371 + UA1823 / UA1966 + UA4556$340.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18Southwest AirlinesWN2655 / WN436$290.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18Southwest AirlinesWN4164 + WN4831 / WN436$295.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18Southwest AirlinesWN4132 + WN1656 / WN436$295.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18Southwest AirlinesWN4149 + WN2392 / WN436$295.002026-10-29T01:28:14Z
2026-12-04 → 2026-12-18Southwest AirlinesWN287 + WN2891 / WN436$295.002026-10-29T01:28:14Z

2026-12-04 → 2026-12-18 · $290.00

  • Southwest Airlines WN4913: STL 2026-12-04 14:45:00 → AUS 2026-12-04 16:50:00; nonstop; 125 minutes. Local airport times.
  • Southwest Airlines WN436: AUS 2026-12-18 07:35:00 → STL 2026-12-18 09:35:00; nonstop; 120 minutes. Local airport times.

2026-12-04 → 2026-12-18 · $320.00

  • American Airlines AA2269 / AA2707: STL 2026-12-04 18:44:00 → AUS 2026-12-04 22:59:00; 1 stop(s) via DFW; 255 minutes. Local airport times.
    • AA2269: STL 2026-12-04 18:44:00 → DFW 2026-12-04 20:45:00; layover at DFW: 69 minutes.
    • AA2707: DFW 2026-12-04 21:54:00 → AUS 2026-12-04 22:59:00.
  • American Airlines AA3885 / AA2246: AUS 2026-12-18 15:00:00 → STL 2026-12-18 19:36:00; 1 stop(s) via DFW; 276 minutes. Local airport times.
    • AA3885: AUS 2026-12-18 15:00:00 → DFW 2026-12-18 16:15:00; layover at DFW: 100 minutes.
    • AA2246: DFW 2026-12-18 17:55:00 → STL 2026-12-18 19:36:00.

2026-12-04 → 2026-12-18 · $340.00

  • United Airlines UA1371 / UA1823: STL 2026-12-04 06:00:00 → AUS 2026-12-04 11:13:00; 1 stop(s) via IAH; 313 minutes. Local airport times.
    • UA1371: STL 2026-12-04 06:00:00 → IAH 2026-12-04 08:21:00; layover at IAH: 101 minutes.
    • UA1823: IAH 2026-12-04 10:02:00 → AUS 2026-12-04 11:13:00.
  • United Airlines UA1966 / UA4556: AUS 2026-12-18 05:15:00 → STL 2026-12-18 09:49:00; 1 stop(s) via IAH; 274 minutes. Local airport times.
    • UA1966: AUS 2026-12-18 05:15:00 → IAH 2026-12-18 06:28:00; layover at IAH: 72 minutes.
    • UA4556: IAH 2026-12-18 07:40:00 → STL 2026-12-18 09:49:00.

2026-12-04 → 2026-12-18 · $290.00

  • Southwest Airlines WN2655: STL 2026-12-04 20:25:00 → AUS 2026-12-04 22:35:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN436: AUS 2026-12-18 07:35:00 → STL 2026-12-18 09:35:00; nonstop; 120 minutes. Local airport times.

2026-12-04 → 2026-12-18 · $295.00

  • Southwest Airlines WN4164 / WN4831: STL 2026-12-04 08:00:00 → AUS 2026-12-04 12:40:00; 1 stop(s) via MCI; 280 minutes. Local airport times.
    • WN4164: STL 2026-12-04 08:00:00 → MCI 2026-12-04 09:10:00; layover at MCI: 90 minutes.
    • WN4831: MCI 2026-12-04 10:40:00 → AUS 2026-12-04 12:40:00.
  • Southwest Airlines WN436: AUS 2026-12-18 07:35:00 → STL 2026-12-18 09:35:00; nonstop; 120 minutes. Local airport times.

2026-12-04 → 2026-12-18 · $295.00

  • Southwest Airlines WN4132 / WN1656: STL 2026-12-04 19:10:00 → AUS 2026-12-04 23:25:00; 1 stop(s) via DAL; 255 minutes. Local airport times.
    • WN4132: STL 2026-12-04 19:10:00 → DAL 2026-12-04 20:50:00; layover at DAL: 85 minutes.
    • WN1656: DAL 2026-12-04 22:15:00 → AUS 2026-12-04 23:25:00.
  • Southwest Airlines WN436: AUS 2026-12-18 07:35:00 → STL 2026-12-18 09:35:00; nonstop; 120 minutes. Local airport times.

2026-12-04 → 2026-12-18 · $295.00

  • Southwest Airlines WN4149 / WN2392: STL 2026-12-04 05:05:00 → AUS 2026-12-04 10:40:00; 1 stop(s) via HOU; 335 minutes. Local airport times.
    • WN4149: STL 2026-12-04 05:05:00 → HOU 2026-12-04 07:10:00; layover at HOU: 155 minutes.
    • WN2392: HOU 2026-12-04 09:45:00 → AUS 2026-12-04 10:40:00.
  • Southwest Airlines WN436: AUS 2026-12-18 07:35:00 → STL 2026-12-18 09:35:00; nonstop; 120 minutes. Local airport times.

2026-12-04 → 2026-12-18 · $295.00

  • Southwest Airlines WN287 / WN2891: STL 2026-12-04 10:55:00 → AUS 2026-12-04 16:35:00; 1 stop(s) via MDW; 340 minutes. Local airport times.
    • WN287: STL 2026-12-04 10:55:00 → MDW 2026-12-04 12:05:00; layover at MDW: 110 minutes.
    • WN2891: MDW 2026-12-04 13:55:00 → AUS 2026-12-04 16:35:00.
  • Southwest Airlines WN436: AUS 2026-12-18 07:35:00 → STL 2026-12-18 09:35:00; nonstop; 120 minutes. Local airport times.

More dates for this route