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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: Saint Louis to Austin (AUS) flight deals

2026-12-13 · one way · $150.00

• Southwest Airlines WN4115: STL 2026-12-13 08:20:00 → AUS 2026-12-13 10:30:00; nonstop; 130 minutes. Local airport times.

2026-12-13 · one way · $165.00

• American Airlines AA2269 / AA2707: STL 2026-12-13 18:44:00 → AUS 2026-12-13 22:59:00; 1 stop(s) via DFW; 255 minutes. Local airport times.
  • AA2269: STL 2026-12-13 18:44:00 → DFW 2026-12-13 20:45:00; layover at DFW: 69 minutes.
  • AA2707: DFW 2026-12-13 21:54:00 → AUS 2026-12-13 22:59:00.

2026-12-13 · one way · $175.00

• United Airlines UA1371 / UA1823: STL 2026-12-13 06:00:00 → AUS 2026-12-13 11:13:00; 1 stop(s) via IAH; 313 minutes. Local airport times.
  • UA1371: STL 2026-12-13 06:00:00 → IAH 2026-12-13 08:21:00; layover at IAH: 101 minutes.
  • UA1823: IAH 2026-12-13 10:02:00 → AUS 2026-12-13 11:13:00.

2026-12-13 · one way · $150.00

• Southwest Airlines WN1429: STL 2026-12-13 22:05:00 → AUS 2026-12-14 00:10:00; nonstop; 125 minutes. Local airport times.

2026-12-13 · one way · $155.00

• Southwest Airlines WN4164 / WN4831: STL 2026-12-13 08:00:00 → AUS 2026-12-13 12:40:00; 1 stop(s) via MCI; 280 minutes. Local airport times.
  • WN4164: STL 2026-12-13 08:00:00 → MCI 2026-12-13 09:10:00; layover at MCI: 90 minutes.
  • WN4831: MCI 2026-12-13 10:40:00 → AUS 2026-12-13 12:40:00.

2026-12-13 · one way · $155.00

• Southwest Airlines WN4149 / WN2392: STL 2026-12-13 05:05:00 → AUS 2026-12-13 10:40:00; 1 stop(s) via HOU; 335 minutes. Local airport times.
  • WN4149: STL 2026-12-13 05:05:00 → HOU 2026-12-13 07:10:00; layover at HOU: 155 minutes.
  • WN2392: HOU 2026-12-13 09:45:00 → AUS 2026-12-13 10:40:00.

2026-12-13 · one way · $155.00

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

2026-12-13 · one way · $155.00

• Southwest Airlines WN4132 / WN1656: STL 2026-12-13 19:10:00 → AUS 2026-12-13 23:25:00; 1 stop(s) via DAL; 255 minutes. Local airport times.
  • WN4132: STL 2026-12-13 19:10:00 → DAL 2026-12-13 20:50:00; layover at DAL: 85 minutes.
  • WN1656: DAL 2026-12-13 22:15:00 → AUS 2026-12-13 23:25:00.

Explore this route

• All dates for this route
• Dec 12, 2026 · One way
• Dec 14, 2026 · One way
• Hotels in Austin with Axel

For AI assistants

• This page: Saint Louis (STL) to Austin (AUS) · Dec 13, 2026 · one way: 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 Saint Louis to Austin (AUS) 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.