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

Washington → Saint Louis

Dec 13, 2026 · return Dec 21, 2026

DCA → STL1 adulteconomyRound trip

9 flight options · 3 airlines

Nonstop flights

Sun, Dec 13 – Mon, Dec 21

Southwest Airlines
6:55 pmDCA
2h 30m
Nonstop
8:25 pmSTL
Southwest Airlines
8:20 amSTL
1h 55m
Nonstop
11:15 amDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

American Airlines
7:59 pmDCA
2h 38m
Nonstop
9:37 pmSTL
American Airlines
6:00 amSTL
2h 3m
Nonstop
9:03 amDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

American Airlines
8:20 amDCA
2h 48m
Nonstop
10:08 amSTL
American Airlines
6:00 amSTL
2h 3m
Nonstop
9:03 amDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Sun, Dec 13 – Mon, Dec 21

United Airlines
6:30 amDCA
5h 12m
ORD · 1h 8m
10:42 amSTL
United Airlines
6:00 amSTL
5h 29m
EWR · 1h 39m
12:29 pmDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

Southwest Airlines
9:05 amDCA
5h 35m
BNA · 2h 15m
1:40 pmSTL
Southwest Airlines
10:35 amSTL
3h 45m
BNA · 1h
3:20 pmDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

Southwest Airlines
4:40 pmDCA
5h 20m
ATL · 1h 40m
9:00 pmSTL
Southwest Airlines
10:35 amSTL
3h 45m
BNA · 1h
3:20 pmDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

Southwest Airlines
6:45 pmDCA
2h 25m
Nonstop
8:10 pmSTL
Southwest Airlines
10:35 amSTL
3h 45m
BNA · 1h
3:20 pmDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

American Airlines
11:46 amDCA
5h 5m
ORD · 1h 21m
3:51 pmSTL
American Airlines
6:00 amSTL
2h 3m
Nonstop
9:03 amDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Mon, Dec 21

American Airlines
6:17 amDCA
5h 2m
CLT · 1h 17m
10:19 amSTL
American Airlines
6:00 amSTL
2h 3m
Nonstop
9:03 amDCA

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

DCA ⇄ STL

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Explore this route

All dates for this routeDec 12, 2026 · Return optionsDec 14, 2026 · Return optionsHotels in St. Louis with Axel
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.

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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-13 → 2026-12-21Southwest AirlinesWN1548 / WN738Axel-exclusive $326.252026-10-29T01:02:54Z
2026-12-13 → 2026-12-21American AirlinesAA4664 / AA2153Axel-exclusive $348.752026-10-29T01:02:54Z
2026-12-13 → 2026-12-21United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $331.882026-10-29T01:02:54Z
2026-12-13 → 2026-12-21American AirlinesAA4458 / AA2153Axel-exclusive $348.752026-10-29T01:02:54Z
2026-12-13 → 2026-12-21Southwest AirlinesWN1514 + WN1472 / WN665 + WN473Axel-exclusive $298.132026-10-29T01:02:54Z
2026-12-13 → 2026-12-21Southwest AirlinesWN4901 + WN261 / WN665 + WN473Axel-exclusive $298.132026-10-29T01:02:54Z
2026-12-13 → 2026-12-21Southwest AirlinesWN1548 / WN665 + WN473Axel-exclusive $310.632026-10-29T01:02:54Z
2026-12-13 → 2026-12-21American AirlinesAA2612 + AA1713 / AA2153Axel-exclusive $336.252026-10-29T01:02:54Z
2026-12-13 → 2026-12-21American AirlinesAA1617 + AA2486 / AA2153Axel-exclusive $336.252026-10-29T01:02:54Z

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

2026-12-13 → 2026-12-21 · Axel-exclusive $326.25

  • Southwest Airlines WN1548: DCA 2026-12-13 18:55:00 → STL 2026-12-13 20:25:00; nonstop; 150 minutes. Local airport times.
  • Southwest Airlines WN738: STL 2026-12-21 08:20:00 → DCA 2026-12-21 11:15:00; nonstop; 115 minutes. Local airport times.

2026-12-13 → 2026-12-21 · Axel-exclusive $348.75

  • American Airlines AA4664: DCA 2026-12-13 19:59:00 → STL 2026-12-13 21:37:00; nonstop; 158 minutes. Local airport times.
  • American Airlines AA2153: STL 2026-12-21 06:00:00 → DCA 2026-12-21 09:03:00; nonstop; 123 minutes. Local airport times.

2026-12-13 → 2026-12-21 · Axel-exclusive $331.88

  • United Airlines UA1793 / UA3556: DCA 2026-12-13 06:30:00 → STL 2026-12-13 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2026-12-13 06:30:00 → ORD 2026-12-13 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2026-12-13 09:00:00 → STL 2026-12-13 10:42:00.
  • United Airlines UA1344 / UA4172: STL 2026-12-21 06:00:00 → DCA 2026-12-21 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-21 06:00:00 → EWR 2026-12-21 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-21 11:00:00 → DCA 2026-12-21 12:29:00.

2026-12-13 → 2026-12-21 · Axel-exclusive $348.75

  • American Airlines AA4458: DCA 2026-12-13 08:20:00 → STL 2026-12-13 10:08:00; nonstop; 168 minutes. Local airport times.
  • American Airlines AA2153: STL 2026-12-21 06:00:00 → DCA 2026-12-21 09:03:00; nonstop; 123 minutes. Local airport times.

2026-12-13 → 2026-12-21 · Axel-exclusive $298.13

  • Southwest Airlines WN1514 / WN1472: DCA 2026-12-13 09:05:00 → STL 2026-12-13 13:40:00; 1 stop(s) via BNA; 335 minutes. Local airport times.
    • WN1514: DCA 2026-12-13 09:05:00 → BNA 2026-12-13 10:15:00; layover at BNA: 135 minutes.
    • WN1472: BNA 2026-12-13 12:30:00 → STL 2026-12-13 13:40:00.
  • Southwest Airlines WN665 / WN473: STL 2026-12-21 10:35:00 → DCA 2026-12-21 15:20:00; 1 stop(s) via BNA; 225 minutes. Local airport times.
    • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
    • WN473: BNA 2026-12-21 12:40:00 → DCA 2026-12-21 15:20:00.

2026-12-13 → 2026-12-21 · Axel-exclusive $298.13

  • Southwest Airlines WN4901 / WN261: DCA 2026-12-13 16:40:00 → STL 2026-12-13 21:00:00; 1 stop(s) via ATL; 320 minutes. Local airport times.
    • WN4901: DCA 2026-12-13 16:40:00 → ATL 2026-12-13 18:35:00; layover at ATL: 100 minutes.
    • WN261: ATL 2026-12-13 20:15:00 → STL 2026-12-13 21:00:00.
  • Southwest Airlines WN665 / WN473: STL 2026-12-21 10:35:00 → DCA 2026-12-21 15:20:00; 1 stop(s) via BNA; 225 minutes. Local airport times.
    • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
    • WN473: BNA 2026-12-21 12:40:00 → DCA 2026-12-21 15:20:00.

2026-12-13 → 2026-12-21 · Axel-exclusive $310.63

  • Southwest Airlines WN1548: DCA 2026-12-13 18:45:00 → STL 2026-12-13 20:10:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN665 / WN473: STL 2026-12-21 10:35:00 → DCA 2026-12-21 15:20:00; 1 stop(s) via BNA; 225 minutes. Local airport times.
    • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
    • WN473: BNA 2026-12-21 12:40:00 → DCA 2026-12-21 15:20:00.

2026-12-13 → 2026-12-21 · Axel-exclusive $336.25

  • American Airlines AA2612 / AA1713: DCA 2026-12-13 11:46:00 → STL 2026-12-13 15:51:00; 1 stop(s) via ORD; 305 minutes. Local airport times.
    • AA2612: DCA 2026-12-13 11:46:00 → ORD 2026-12-13 13:08:00; layover at ORD: 81 minutes.
    • AA1713: ORD 2026-12-13 14:29:00 → STL 2026-12-13 15:51:00.
  • American Airlines AA2153: STL 2026-12-21 06:00:00 → DCA 2026-12-21 09:03:00; nonstop; 123 minutes. Local airport times.

2026-12-13 → 2026-12-21 · Axel-exclusive $336.25

  • American Airlines AA1617 / AA2486: DCA 2026-12-13 06:17:00 → STL 2026-12-13 10:19:00; 1 stop(s) via CLT; 302 minutes. Local airport times.
    • AA1617: DCA 2026-12-13 06:17:00 → CLT 2026-12-13 07:58:00; layover at CLT: 77 minutes.
    • AA2486: CLT 2026-12-13 09:15:00 → STL 2026-12-13 10:19:00.
  • American Airlines AA2153: STL 2026-12-21 06:00:00 → DCA 2026-12-21 09:03:00; nonstop; 123 minutes. Local airport times.

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For AI assistants

  • This page: Washington (DCA) to Saint Louis (STL) · Dec 13, 2026 · return Dec 21, 2026: 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.