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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

2026-12-13 · one way · Axel-exclusive $190.00

• United Airlines UA4527: IAD 2026-12-13 17:55:00 → STL 2026-12-13 19:30:00; nonstop; 155 minutes. Local airport times.

2026-12-13 · one way · Axel-exclusive $170.00

• American Airlines AA5649 / AA2486: IAD 2026-12-13 06:00:00 → STL 2026-12-13 10:19:00; 1 stop(s) via CLT; 319 minutes. Local airport times.
  • AA5649: IAD 2026-12-13 06:00:00 → CLT 2026-12-13 07:48:00; layover at CLT: 87 minutes.
  • AA2486: CLT 2026-12-13 09:15:00 → STL 2026-12-13 10:19:00.

2026-12-13 · one way · Axel-exclusive $180.00

• Delta Air Lines DL1444 / DL1393: IAD 2026-12-13 12:34:00 → STL 2026-12-13 18:01:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • DL1444: IAD 2026-12-13 12:34:00 → ATL 2026-12-13 14:31:00; layover at ATL: 169 minutes.
  • DL1393: ATL 2026-12-13 17:20:00 → STL 2026-12-13 18:01:00.

2026-12-13 · one way · Axel-exclusive $300.00

• Air Canada AC8615 / AC8889: IAD 2026-12-13 09:55:00 → STL 2026-12-13 15:26:00; 1 stop(s) via YYZ; 391 minutes. Local airport times.
  • AC8615: IAD 2026-12-13 09:55:00 → YYZ 2026-12-13 11:22:00; layover at YYZ: 168 minutes.
  • AC8889: YYZ 2026-12-13 14:10:00 → STL 2026-12-13 15:26:00.

2026-12-13 · one way · Axel-exclusive $190.00

• United Airlines UA4427: IAD 2026-12-13 08:30:00 → STL 2026-12-13 10:03:00; nonstop; 153 minutes. Local airport times.

2026-12-13 · one way · Axel-exclusive $175.00

• United Airlines UA1775 / UA2844: IAD 2026-12-13 08:23:00 → STL 2026-12-13 12:10:00; 1 stop(s) via ORD; 287 minutes. Local airport times.
  • UA1775: IAD 2026-12-13 08:23:00 → ORD 2026-12-13 09:45:00; layover at ORD: 60 minutes.
  • UA2844: ORD 2026-12-13 10:45:00 → STL 2026-12-13 12:10:00.

2026-12-13 · one way · Axel-exclusive $175.00

• United Airlines UA1359 / UA3571: IAD 2026-12-13 06:10:00 → STL 2026-12-13 11:04:00; 1 stop(s) via EWR; 354 minutes. Local airport times.
  • UA1359: IAD 2026-12-13 06:10:00 → EWR 2026-12-13 07:28:00; layover at EWR: 92 minutes.
  • UA3571: EWR 2026-12-13 09:00:00 → STL 2026-12-13 11:04:00.

2026-12-13 · one way · Axel-exclusive $180.00

• Delta Air Lines DL5618 / DL4715: IAD 2026-12-13 12:35:00 → STL 2026-12-13 17:06:00; 1 stop(s) via JFK; 331 minutes. Local airport times.
  • DL5618: IAD 2026-12-13 12:35:00 → JFK 2026-12-13 14:01:00; layover at JFK: 69 minutes.
  • DL4715: JFK 2026-12-13 15:10:00 → STL 2026-12-13 17:06:00.

Explore this route

• All dates for this route
• Dec 12, 2026 · Return options
• Dec 14, 2026 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: Dulles (IAD) to Saint Louis (STL) · 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 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. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. 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.