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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.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Washington, DC to Saint Louis (STL) flight deals

2026-12-11 · one way · Axel-exclusive $155.00

• Southwest Airlines WN1548: DCA 2026-12-11 18:45:00 → STL 2026-12-11 20:10:00; nonstop; 145 minutes. Local airport times.

2026-12-11 · one way · Axel-exclusive $165.00

• American Airlines AA4458: DCA 2026-12-11 08:11:00 → STL 2026-12-11 09:55:00; nonstop; 164 minutes. Local airport times.

2026-12-11 · one way · Axel-exclusive $155.00

• United Airlines UA1793 / UA3556: DCA 2026-12-11 06:30:00 → STL 2026-12-11 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
  • UA1793: DCA 2026-12-11 06:30:00 → ORD 2026-12-11 07:52:00; layover at ORD: 68 minutes.
  • UA3556: ORD 2026-12-11 09:00:00 → STL 2026-12-11 10:42:00.

2026-12-11 · one way · Axel-exclusive $160.00

• Delta Air Lines DL1558 / DL1371: DCA 2026-12-11 09:45:00 → STL 2026-12-11 13:30:00; 1 stop(s) via DTW; 285 minutes. Local airport times.
  • DL1558: DCA 2026-12-11 09:45:00 → DTW 2026-12-11 11:22:00; layover at DTW: 81 minutes.
  • DL1371: DTW 2026-12-11 12:43:00 → STL 2026-12-11 13:30:00.

2026-12-11 · one way · Axel-exclusive $155.00

• Southwest Airlines WN754: DCA 2026-12-11 14:40:00 → STL 2026-12-11 16:05:00; nonstop; 145 minutes. Local airport times.

2026-12-11 · one way · Axel-exclusive $165.00

• American Airlines AA4664: DCA 2026-12-11 20:03:00 → STL 2026-12-11 21:38:00; nonstop; 155 minutes. Local airport times.

2026-12-11 · one way · Axel-exclusive $140.00

• Southwest Airlines WN4901 / WN261: DCA 2026-12-11 16:40:00 → STL 2026-12-11 21:00:00; 1 stop(s) via ATL; 320 minutes. Local airport times.
  • WN4901: DCA 2026-12-11 16:40:00 → ATL 2026-12-11 18:35:00; layover at ATL: 100 minutes.
  • WN261: ATL 2026-12-11 20:15:00 → STL 2026-12-11 21:00:00.

2026-12-11 · one way · Axel-exclusive $140.00

• Southwest Airlines WN1514 / WN1472: DCA 2026-12-11 09:05:00 → STL 2026-12-11 13:40:00; 1 stop(s) via BNA; 335 minutes. Local airport times.
  • WN1514: DCA 2026-12-11 09:05:00 → BNA 2026-12-11 10:15:00; layover at BNA: 135 minutes.
  • WN1472: BNA 2026-12-11 12:30:00 → STL 2026-12-11 13:40:00.

2026-12-11 · one way · Axel-exclusive $150.00

• American Airlines AA2612 / AA1713: DCA 2026-12-11 11:46:00 → STL 2026-12-11 15:51:00; 1 stop(s) via ORD; 305 minutes. Local airport times.
  • AA2612: DCA 2026-12-11 11:46:00 → ORD 2026-12-11 13:08:00; layover at ORD: 81 minutes.
  • AA1713: ORD 2026-12-11 14:29:00 → STL 2026-12-11 15:51:00.

2026-12-11 · one way · Axel-exclusive $150.00

• American Airlines AA1617 / AA2486: DCA 2026-12-11 06:17:00 → STL 2026-12-11 10:19:00; 1 stop(s) via CLT; 302 minutes. Local airport times.
  • AA1617: DCA 2026-12-11 06:17:00 → CLT 2026-12-11 07:58:00; layover at CLT: 77 minutes.
  • AA2486: CLT 2026-12-11 09:15:00 → STL 2026-12-11 10:19:00.

Explore this route

• All dates for this route
• Dec 10, 2026 · One way
• Dec 12, 2026 · One way
• Hotels in St. Louis with Axel

For AI assistants

• This page: Washington (DCA) to Saint Louis (STL) · Dec 11, 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 Washington, DC to Saint Louis (STL) 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.