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Route overview: Saint Louis to Washington (DCA) flight deals

Saint Louis → Washington

Aug 20, 2027 · choose your return date

STL → DCA1 adulteconomyOne way and round trips

30 flight options · 2 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.

August 2027

Aug 20, 2027 · One waySouthwest AirlinesNonstop$166.25 Aug 20, 2027 · One wayUnited AirlinesUp to 1 stop each way$175.75 Aug 20, 2027 – Aug 21, 2027 · 1 nightSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 21, 2027 · 1 nightUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 22, 2027 · 2 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 22, 2027 · 2 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 23, 2027 · 3 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 23, 2027 · 3 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 24, 2027 · 4 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 24, 2027 · 4 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 25, 2027 · 5 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 25, 2027 · 5 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 26, 2027 · 6 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 26, 2027 · 6 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 27, 2027 · 7 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 27, 2027 · 7 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 28, 2027 · 8 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 28, 2027 · 8 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 29, 2027 · 9 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 29, 2027 · 9 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 30, 2027 · 10 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 30, 2027 · 10 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Aug 31, 2027 · 11 nightsSouthwest AirlinesNonstop$308.76 Aug 20, 2027 – Aug 31, 2027 · 11 nightsUnited AirlinesUp to 1 stop each way$327.76 Aug 20, 2027 – Sep 1, 2027 · 12 nightsSouthwest AirlinesNonstop$316.88 Aug 20, 2027 – Sep 1, 2027 · 12 nightsUnited AirlinesUp to 1 stop each way$336.38 Aug 20, 2027 – Sep 2, 2027 · 13 nightsSouthwest AirlinesNonstop$316.88 Aug 20, 2027 – Sep 2, 2027 · 13 nightsUnited AirlinesUp to 1 stop each way$336.38 Aug 20, 2027 – Sep 3, 2027 · 14 nightsSouthwest AirlinesNonstop$341.26 Aug 20, 2027 – Sep 3, 2027 · 14 nightsUnited AirlinesUp to 1 stop each way$362.26

Flights for your trip

  1. Fri, Aug 20 · One way

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA

    One-way total · 1 adult · Taxes included

  2. Fri, Aug 20 · One way

    United Airlines
    6:00 amSTL
    5h 29m
    EWR · 1h 39m
    12:29 pmDCA

    One-way total · 1 adult · Taxes included

  3. Fri, Aug 20 – Sat, Aug 21

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    8:25 amDCA
    2h 30m
    Nonstop
    9:55 amSTL

    Round-trip total · 1 adult · Taxes included

  4. Fri, Aug 20 – Sat, Aug 21

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

    Round-trip total · 1 adult · Taxes included

  5. Fri, Aug 20 – Sun, Aug 22

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    6:45 pmDCA
    2h 25m
    Nonstop
    8:10 pmSTL

    Round-trip total · 1 adult · Taxes included

  6. Fri, Aug 20 – Sun, Aug 22

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

    Round-trip total · 1 adult · Taxes included

  7. Fri, Aug 20 – Mon, Aug 23

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  8. Fri, Aug 20 – Mon, Aug 23

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

    Round-trip total · 1 adult · Taxes included

  9. Fri, Aug 20 – Tue, Aug 24

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  10. Fri, Aug 20 – Tue, Aug 24

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

    Round-trip total · 1 adult · Taxes included

  11. Fri, Aug 20 – Thu, Aug 26

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  12. Fri, Aug 20 – Thu, Aug 26

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

    Round-trip total · 1 adult · Taxes included

  13. Fri, Aug 20 – Fri, Aug 27

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  14. Fri, Aug 20 – Fri, Aug 27

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

    Round-trip total · 1 adult · Taxes included

  15. Fri, Aug 20 – Sat, Aug 28

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    8:25 amDCA
    2h 30m
    Nonstop
    9:55 amSTL

    Round-trip total · 1 adult · Taxes included

  16. Fri, Aug 20 – Sat, Aug 28

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

    Round-trip total · 1 adult · Taxes included

  17. Fri, Aug 20 – Mon, Aug 30

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  18. Fri, Aug 20 – Mon, Aug 30

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

    Round-trip total · 1 adult · Taxes included

  19. Fri, Aug 20 – Tue, Aug 31

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  20. Fri, Aug 20 – Tue, Aug 31

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

    Round-trip total · 1 adult · Taxes included

  21. Fri, Aug 20 – Wed, Sep 1

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  22. Fri, Aug 20 – Wed, Sep 1

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

    Round-trip total · 1 adult · Taxes included

  23. Fri, Aug 20 – Fri, Sep 3

    Southwest Airlines
    8:20 amSTL
    1h 55m
    Nonstop
    11:15 amDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

  24. Fri, Aug 20 – Fri, Sep 3

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

    Round-trip total · 1 adult · Taxes included

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STL ⇄ DCA

Economy

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Explore this route

All dates for this routeAug 19, 2027 · Return optionsAug 21, 2027 · Return optionsHotels in Washington, DC with Axel
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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.

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)
2027-08-20 · one waySouthwest AirlinesWN738Axel-exclusive $166.252026-10-29T01:28:26Z
2027-08-20 · one wayUnited AirlinesUA1344 + UA4172Axel-exclusive $175.752026-10-29T01:28:26Z
2027-08-20 → 2027-08-21Southwest AirlinesWN738 / WN1542Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-21United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-22Southwest AirlinesWN738 / WN1548Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-22United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-23Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-23United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-24Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-24United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-25Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-25United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-26Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-26United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-27Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-27United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-28Southwest AirlinesWN738 / WN1542Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-28United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-29Southwest AirlinesWN738 / WN1548Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-29United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-30Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-30United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-31Southwest AirlinesWN738 / WN754Axel-exclusive $308.762026-10-29T01:28:26Z
2027-08-20 → 2027-08-31United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $327.762026-10-29T01:28:26Z
2027-08-20 → 2027-09-01Southwest AirlinesWN738 / WN754Axel-exclusive $316.882026-10-29T01:28:26Z
2027-08-20 → 2027-09-01United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $336.382026-10-29T01:28:26Z
2027-08-20 → 2027-09-02Southwest AirlinesWN738 / WN754Axel-exclusive $316.882026-10-29T01:28:26Z
2027-08-20 → 2027-09-02United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $336.382026-10-29T01:28:26Z
2027-08-20 → 2027-09-03Southwest AirlinesWN738 / WN754Axel-exclusive $341.262026-10-29T01:28:26Z
2027-08-20 → 2027-09-03United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $362.262026-10-29T01:28:26Z

Route overview: Saint Louis to Washington (DCA) flight deals

2027-08-20 · one way · Axel-exclusive $166.25

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.

2027-08-20 · one way · Axel-exclusive $175.75

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.

2027-08-20 → 2027-08-21 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN1542: DCA 2027-08-21 08:25:00 → STL 2027-08-21 09:55:00; nonstop; 150 minutes. Local airport times.

2027-08-20 → 2027-08-21 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-21 06:30:00 → STL 2027-08-21 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-21 06:30:00 → ORD 2027-08-21 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-21 09:00:00 → STL 2027-08-21 10:42:00.

2027-08-20 → 2027-08-22 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN1548: DCA 2027-08-22 18:45:00 → STL 2027-08-22 20:10:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-22 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-22 06:30:00 → STL 2027-08-22 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-22 06:30:00 → ORD 2027-08-22 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-22 09:00:00 → STL 2027-08-22 10:42:00.

2027-08-20 → 2027-08-23 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-08-23 14:40:00 → STL 2027-08-23 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-23 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-23 06:30:00 → STL 2027-08-23 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-23 06:30:00 → ORD 2027-08-23 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-23 09:00:00 → STL 2027-08-23 10:42:00.

2027-08-20 → 2027-08-24 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-08-24 14:40:00 → STL 2027-08-24 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-24 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-24 06:30:00 → STL 2027-08-24 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-24 06:30:00 → ORD 2027-08-24 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-24 09:00:00 → STL 2027-08-24 10:42:00.

2027-08-20 → 2027-08-26 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-08-26 14:40:00 → STL 2027-08-26 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-26 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-26 06:30:00 → STL 2027-08-26 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-26 06:30:00 → ORD 2027-08-26 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-26 09:00:00 → STL 2027-08-26 10:42:00.

2027-08-20 → 2027-08-27 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-08-27 14:40:00 → STL 2027-08-27 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-27 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-27 06:30:00 → STL 2027-08-27 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-27 06:30:00 → ORD 2027-08-27 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-27 09:00:00 → STL 2027-08-27 10:42:00.

2027-08-20 → 2027-08-28 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN1542: DCA 2027-08-28 08:25:00 → STL 2027-08-28 09:55:00; nonstop; 150 minutes. Local airport times.

2027-08-20 → 2027-08-28 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-28 06:30:00 → STL 2027-08-28 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-28 06:30:00 → ORD 2027-08-28 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-28 09:00:00 → STL 2027-08-28 10:42:00.

2027-08-20 → 2027-08-30 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-08-30 14:40:00 → STL 2027-08-30 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-30 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-30 06:30:00 → STL 2027-08-30 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-30 06:30:00 → ORD 2027-08-30 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-30 09:00:00 → STL 2027-08-30 10:42:00.

2027-08-20 → 2027-08-31 · Axel-exclusive $308.76

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-08-31 14:40:00 → STL 2027-08-31 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-08-31 · Axel-exclusive $327.76

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-08-31 06:30:00 → STL 2027-08-31 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-08-31 06:30:00 → ORD 2027-08-31 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-08-31 09:00:00 → STL 2027-08-31 10:42:00.

2027-08-20 → 2027-09-01 · Axel-exclusive $316.88

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-09-01 14:40:00 → STL 2027-09-01 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-09-01 · Axel-exclusive $336.38

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-09-01 06:30:00 → STL 2027-09-01 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-09-01 06:30:00 → ORD 2027-09-01 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-09-01 09:00:00 → STL 2027-09-01 10:42:00.

2027-08-20 → 2027-09-03 · Axel-exclusive $341.26

  • Southwest Airlines WN738: STL 2027-08-20 08:20:00 → DCA 2027-08-20 11:15:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-09-03 14:40:00 → STL 2027-09-03 16:05:00; nonstop; 145 minutes. Local airport times.

2027-08-20 → 2027-09-03 · Axel-exclusive $362.26

  • United Airlines UA1344 / UA4172: STL 2027-08-20 06:00:00 → DCA 2027-08-20 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-08-20 06:00:00 → EWR 2027-08-20 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-08-20 11:00:00 → DCA 2027-08-20 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-09-03 06:30:00 → STL 2027-09-03 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-09-03 06:30:00 → ORD 2027-09-03 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-09-03 09:00:00 → STL 2027-09-03 10:42:00.

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For AI assistants

  • This page: Saint Louis (STL) to Washington (DCA) · Aug 20, 2027 · 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 Saint Louis to Washington (DCA) 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.