Travel with Axel,
get the best price.

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

Washington → Saint Louis

Dec 11, 2026 · choose your return date

DCA → STL1 adulteconomyOne way and round trips

30 flight options · 3 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

December 2026

Dec 11, 2026 · One waySouthwest AirlinesNonstop$155.00 Dec 11, 2026 · One wayUnited AirlinesUp to 1 stop each way$155.00 Dec 11, 2026 – Dec 12, 2026 · 1 nightSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 12, 2026 · 1 nightUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 13, 2026 · 2 nightsSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 13, 2026 · 2 nightsUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 14, 2026 · 3 nightsSouthwest AirlinesUp to 1 stop each way$277.50 Dec 11, 2026 – Dec 14, 2026 · 3 nightsAmerican AirlinesNonstop$310.00 Dec 11, 2026 – Dec 15, 2026 · 4 nightsSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 15, 2026 · 4 nightsUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 16, 2026 · 5 nightsSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 16, 2026 · 5 nightsUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 17, 2026 · 6 nightsSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 17, 2026 · 6 nightsUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 18, 2026 · 7 nightsSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 18, 2026 · 7 nightsUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 19, 2026 · 8 nightsSouthwest AirlinesNonstop$290.00 Dec 11, 2026 – Dec 19, 2026 · 8 nightsUnited AirlinesUp to 1 stop each way$295.00 Dec 11, 2026 – Dec 20, 2026 · 9 nightsSouthwest AirlinesNonstop$326.25 Dec 11, 2026 – Dec 20, 2026 · 9 nightsUnited AirlinesUp to 1 stop each way$331.88 Dec 11, 2026 – Dec 21, 2026 · 10 nightsSouthwest AirlinesUp to 1 stop each way$310.63 Dec 11, 2026 – Dec 21, 2026 · 10 nightsAmerican AirlinesNonstop$348.75 Dec 11, 2026 – Dec 22, 2026 · 11 nightsSouthwest AirlinesNonstop$326.25 Dec 11, 2026 – Dec 22, 2026 · 11 nightsUnited AirlinesUp to 1 stop each way$331.88 Dec 11, 2026 – Dec 23, 2026 · 12 nightsSouthwest AirlinesNonstop$326.25 Dec 11, 2026 – Dec 23, 2026 · 12 nightsUnited AirlinesUp to 1 stop each way$331.88 Dec 11, 2026 – Dec 24, 2026 · 13 nightsSouthwest AirlinesNonstop$326.25 Dec 11, 2026 – Dec 24, 2026 · 13 nightsUnited AirlinesUp to 1 stop each way$331.88 Dec 11, 2026 – Dec 25, 2026 · 14 nightsSouthwest AirlinesNonstop$326.25 Dec 11, 2026 – Dec 25, 2026 · 14 nightsUnited AirlinesUp to 1 stop each way$331.88

Flights for your trip

  1. Fri, Dec 11 · One way

    United Airlines
    6:30 amDCA
    5h 12m
    ORD · 1h 8m
    10:42 amSTL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Fri, Dec 11 · One way

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 pmSTL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Fri, Dec 11 – Sat, Dec 12

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 pmSTL
    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Fri, Dec 11 – Sat, Dec 12

    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.

  5. Fri, Dec 11 – Sun, Dec 13

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 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.

  6. Fri, Dec 11 – Sun, Dec 13

    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.

  7. Fri, Dec 11 – Mon, Dec 14

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    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.

  8. Fri, Dec 11 – Mon, Dec 14

    American Airlines
    7:59 pmDCA
    2h 42m
    Nonstop
    9:41 pmSTL
    American Airlines
    3:41 pmSTL
    2h 6m
    Nonstop
    6:47 pmDCA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Fri, Dec 11 – Tue, Dec 15

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 pmSTL
    Southwest Airlines
    8:40 amSTL
    1h 55m
    Nonstop
    11:35 amDCA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Fri, Dec 11 – Tue, Dec 15

    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.

  11. Fri, Dec 11 – Thu, Dec 17

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 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.

  12. Fri, Dec 11 – Thu, Dec 17

    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.

  13. Fri, Dec 11 – Fri, Dec 18

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 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.

  14. Fri, Dec 11 – Fri, Dec 18

    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.

  15. Fri, Dec 11 – Sat, Dec 19

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 pmSTL
    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Fri, Dec 11 – Sat, Dec 19

    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.

  17. Fri, Dec 11 – Mon, Dec 21

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    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.

  18. Fri, Dec 11 – Mon, Dec 21

    American Airlines
    7:59 pmDCA
    2h 42m
    Nonstop
    9:41 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.

  19. Fri, Dec 11 – Tue, Dec 22

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 pmSTL
    Southwest Airlines
    8:40 amSTL
    1h 55m
    Nonstop
    11:35 amDCA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Fri, Dec 11 – Tue, Dec 22

    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.

  21. Fri, Dec 11 – Wed, Dec 23

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 pmSTL
    Southwest Airlines
    8:40 amSTL
    1h 55m
    Nonstop
    11:35 amDCA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Fri, Dec 11 – Wed, Dec 23

    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.

  23. Fri, Dec 11 – Fri, Dec 25

    Southwest Airlines
    12:15 pmDCA
    2h 25m
    Nonstop
    1:40 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.

  24. Fri, Dec 11 – Fri, Dec 25

    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.

Swipe to see 23 more recent deals.

1 of 24

Make this trip yours

DCA ⇄ STL

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

Explore this route

All dates for this routeDec 10, 2026 · Return optionsDec 12, 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.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown. To book or select flights, follow that row's price link; it keeps the exact dates and travelers.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-11 · one waySouthwest AirlinesWN4962Axel-exclusive $155.002026-10-29T01:02:54Z
2026-12-11 · one wayUnited AirlinesUA1793 + UA3556Axel-exclusive $155.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-12Southwest AirlinesWN4962 / WN2546Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-12United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-13Southwest AirlinesWN4962 / WN738Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-13United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-14American AirlinesAA4664 / AA4769Axel-exclusive $310.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-14Southwest AirlinesWN4962 / WN665 + WN473Axel-exclusive $277.502026-10-29T01:02:54Z
2026-12-11 → 2026-12-15Southwest AirlinesWN4962 / WN1614Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-15United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-16Southwest AirlinesWN4962 / WN1614Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-16United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-17Southwest AirlinesWN4962 / WN738Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-17United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-18Southwest AirlinesWN4962 / WN738Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-18United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-19Southwest AirlinesWN4962 / WN2546Axel-exclusive $290.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-19United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $295.002026-10-29T01:02:54Z
2026-12-11 → 2026-12-20Southwest AirlinesWN4962 / WN738Axel-exclusive $326.252026-10-29T01:02:54Z
2026-12-11 → 2026-12-20United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $331.882026-10-29T01:02:54Z
2026-12-11 → 2026-12-21American AirlinesAA4664 / AA2153Axel-exclusive $348.752026-10-29T01:02:54Z
2026-12-11 → 2026-12-21Southwest AirlinesWN4962 / WN665 + WN473Axel-exclusive $310.632026-10-29T01:02:54Z
2026-12-11 → 2026-12-22Southwest AirlinesWN4962 / WN1614Axel-exclusive $326.252026-10-29T01:02:54Z
2026-12-11 → 2026-12-22United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $331.882026-10-29T01:02:54Z
2026-12-11 → 2026-12-23Southwest AirlinesWN4962 / WN1614Axel-exclusive $326.252026-10-29T01:02:54Z
2026-12-11 → 2026-12-23United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $331.882026-10-29T01:02:54Z
2026-12-11 → 2026-12-24Southwest AirlinesWN4962 / WN2546Axel-exclusive $326.252026-10-29T01:02:54Z
2026-12-11 → 2026-12-24United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $331.882026-10-29T01:02:54Z
2026-12-11 → 2026-12-25Southwest AirlinesWN4962 / WN738Axel-exclusive $326.252026-10-29T01:02:54Z
2026-12-11 → 2026-12-25United AirlinesUA1793 + UA3556 / UA1344 + UA4172Axel-exclusive $331.882026-10-29T01:02:54Z

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

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 $155.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.

2026-12-11 → 2026-12-12 · Axel-exclusive $290.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN2546: STL 2026-12-12 11:10:00 → DCA 2026-12-12 14:10:00; nonstop; 120 minutes. Local airport times.

2026-12-11 → 2026-12-12 · Axel-exclusive $295.00

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-12 06:00:00 → DCA 2026-12-12 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-12 06:00:00 → EWR 2026-12-12 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-12 11:00:00 → DCA 2026-12-12 12:29:00.

2026-12-11 → 2026-12-13 · Axel-exclusive $290.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN738: STL 2026-12-13 08:20:00 → DCA 2026-12-13 11:15:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-13 · Axel-exclusive $295.00

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-13 06:00:00 → DCA 2026-12-13 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-13 06:00:00 → EWR 2026-12-13 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-13 11:00:00 → DCA 2026-12-13 12:29:00.

2026-12-11 → 2026-12-14 · Axel-exclusive $277.50

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN665 / WN473: STL 2026-12-14 10:35:00 → DCA 2026-12-14 15:20:00; 1 stop(s) via BNA; 225 minutes. Local airport times.
    • WN665: STL 2026-12-14 10:35:00 → BNA 2026-12-14 11:40:00; layover at BNA: 60 minutes.
    • WN473: BNA 2026-12-14 12:40:00 → DCA 2026-12-14 15:20:00.

2026-12-11 → 2026-12-14 · Axel-exclusive $310.00

  • American Airlines AA4664: DCA 2026-12-11 19:59:00 → STL 2026-12-11 21:41:00; nonstop; 162 minutes. Local airport times.
  • American Airlines AA4769: STL 2026-12-14 15:41:00 → DCA 2026-12-14 18:47:00; nonstop; 126 minutes. Local airport times.

2026-12-11 → 2026-12-15 · Axel-exclusive $290.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN1614: STL 2026-12-15 08:40:00 → DCA 2026-12-15 11:35:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-15 · Axel-exclusive $295.00

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-15 06:00:00 → DCA 2026-12-15 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-15 06:00:00 → EWR 2026-12-15 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-15 11:00:00 → DCA 2026-12-15 12:29:00.

2026-12-11 → 2026-12-17 · Axel-exclusive $290.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN738: STL 2026-12-17 08:20:00 → DCA 2026-12-17 11:15:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-17 · Axel-exclusive $295.00

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-17 06:00:00 → DCA 2026-12-17 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-17 06:00:00 → EWR 2026-12-17 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-17 11:00:00 → DCA 2026-12-17 12:29:00.

2026-12-11 → 2026-12-18 · Axel-exclusive $290.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN738: STL 2026-12-18 08:20:00 → DCA 2026-12-18 11:15:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-18 · Axel-exclusive $295.00

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-18 06:00:00 → DCA 2026-12-18 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-18 06:00:00 → EWR 2026-12-18 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-18 11:00:00 → DCA 2026-12-18 12:29:00.

2026-12-11 → 2026-12-19 · Axel-exclusive $290.00

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN2546: STL 2026-12-19 11:10:00 → DCA 2026-12-19 14:10:00; nonstop; 120 minutes. Local airport times.

2026-12-11 → 2026-12-19 · Axel-exclusive $295.00

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-19 06:00:00 → DCA 2026-12-19 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-19 06:00:00 → EWR 2026-12-19 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-19 11:00:00 → DCA 2026-12-19 12:29:00.

2026-12-11 → 2026-12-21 · Axel-exclusive $310.63

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; 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.

2026-12-11 → 2026-12-21 · Axel-exclusive $348.75

  • American Airlines AA4664: DCA 2026-12-11 19:59:00 → STL 2026-12-11 21:41:00; nonstop; 162 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.

2026-12-11 → 2026-12-22 · Axel-exclusive $326.25

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN1614: STL 2026-12-22 08:40:00 → DCA 2026-12-22 11:35:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-22 · Axel-exclusive $331.88

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-22 06:00:00 → DCA 2026-12-22 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-22 06:00:00 → EWR 2026-12-22 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-22 11:00:00 → DCA 2026-12-22 12:29:00.

2026-12-11 → 2026-12-23 · Axel-exclusive $326.25

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN1614: STL 2026-12-23 08:40:00 → DCA 2026-12-23 11:35:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-23 · Axel-exclusive $331.88

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-23 06:00:00 → DCA 2026-12-23 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-23 06:00:00 → EWR 2026-12-23 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-23 11:00:00 → DCA 2026-12-23 12:29:00.

2026-12-11 → 2026-12-25 · Axel-exclusive $326.25

  • Southwest Airlines WN4962: DCA 2026-12-11 12:15:00 → STL 2026-12-11 13:40:00; nonstop; 145 minutes. Local airport times.
  • Southwest Airlines WN738: STL 2026-12-25 08:20:00 → DCA 2026-12-25 11:15:00; nonstop; 115 minutes. Local airport times.

2026-12-11 → 2026-12-25 · Axel-exclusive $331.88

  • 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.
  • United Airlines UA1344 / UA4172: STL 2026-12-25 06:00:00 → DCA 2026-12-25 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2026-12-25 06:00:00 → EWR 2026-12-25 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2026-12-25 11:00:00 → DCA 2026-12-25 12:29:00.

Explore this route

For AI assistants

  • This page: Washington (DCA) to Saint Louis (STL) · Dec 11, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
  • 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.