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

Saint Louis → Washington

Mar 14, 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.

March 2027

Mar 14, 2027 · One waySouthwest AirlinesNonstop$155.00 Mar 14, 2027 · One wayUnited AirlinesUp to 1 stop each way$165.00 Mar 14, 2027 – Mar 15, 2027 · 1 nightSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 15, 2027 · 1 nightUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 16, 2027 · 2 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 16, 2027 · 2 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 17, 2027 · 3 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 17, 2027 · 3 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 18, 2027 · 4 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 18, 2027 · 4 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 19, 2027 · 5 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 19, 2027 · 5 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 20, 2027 · 6 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 20, 2027 · 6 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 21, 2027 · 7 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 21, 2027 · 7 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 22, 2027 · 8 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 22, 2027 · 8 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 23, 2027 · 9 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 23, 2027 · 9 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 24, 2027 · 10 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 24, 2027 · 10 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 25, 2027 · 11 nightsSouthwest AirlinesNonstop$285.00 Mar 14, 2027 – Mar 25, 2027 · 11 nightsUnited AirlinesUp to 1 stop each way$305.00 Mar 14, 2027 – Mar 26, 2027 · 12 nightsSouthwest AirlinesNonstop$313.50 Mar 14, 2027 – Mar 26, 2027 · 12 nightsUnited AirlinesUp to 1 stop each way$335.50 Mar 14, 2027 – Mar 27, 2027 · 13 nightsSouthwest AirlinesNonstop$313.50 Mar 14, 2027 – Mar 27, 2027 · 13 nightsUnited AirlinesUp to 1 stop each way$335.50 Mar 14, 2027 – Mar 28, 2027 · 14 nightsSouthwest AirlinesNonstop$337.50 Mar 14, 2027 – Mar 28, 2027 · 14 nightsUnited AirlinesUp to 1 stop each way$359.50

Flights for your trip

  1. Sun, Mar 14 · One way

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Sun, Mar 14 · One way

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

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Sun, Mar 14 – Mon, Mar 15

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    8:25 amDCA
    2h 30m
    Nonstop
    9:55 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Sun, Mar 14 – Mon, Mar 15

    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

    Availability is checked when you select these flights.

  5. Sun, Mar 14 – Tue, Mar 16

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    2:40 pmDCA
    2h 25m
    Nonstop
    4:05 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Sun, Mar 14 – Tue, Mar 16

    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

    Availability is checked when you select these flights.

  7. Sun, Mar 14 – Wed, Mar 17

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    12:00 pmDCA
    2h 30m
    Nonstop
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Sun, Mar 14 – Wed, Mar 17

    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

    Availability is checked when you select these flights.

  9. Sun, Mar 14 – Thu, Mar 18

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    12:00 pmDCA
    2h 30m
    Nonstop
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Sun, Mar 14 – Thu, Mar 18

    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

    Availability is checked when you select these flights.

  11. Sun, Mar 14 – Sat, Mar 20

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    12:00 pmDCA
    2h 30m
    Nonstop
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Sun, Mar 14 – Sat, Mar 20

    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

    Availability is checked when you select these flights.

  13. Sun, Mar 14 – Sun, Mar 21

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    6:45 pmDCA
    2h 25m
    Nonstop
    8:10 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Sun, Mar 14 – Sun, Mar 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

    Availability is checked when you select these flights.

  15. Sun, Mar 14 – Mon, Mar 22

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    8:25 amDCA
    2h 30m
    Nonstop
    9:55 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Sun, Mar 14 – Mon, Mar 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

    Availability is checked when you select these flights.

  17. Sun, Mar 14 – Wed, Mar 24

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    12:00 pmDCA
    2h 30m
    Nonstop
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Sun, Mar 14 – Wed, Mar 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

    Availability is checked when you select these flights.

  19. Sun, Mar 14 – Thu, Mar 25

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    12:00 pmDCA
    2h 30m
    Nonstop
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Sun, Mar 14 – Thu, Mar 25

    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

    Availability is checked when you select these flights.

  21. Sun, Mar 14 – Fri, Mar 26

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    12:00 pmDCA
    2h 30m
    Nonstop
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Sun, Mar 14 – Fri, Mar 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

    Availability is checked when you select these flights.

  23. Sun, Mar 14 – Sun, Mar 28

    Southwest Airlines
    11:10 amSTL
    2h
    Nonstop
    2:10 pmDCA
    Southwest Airlines
    6:45 pmDCA
    2h 25m
    Nonstop
    8:10 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Sun, Mar 14 – Sun, Mar 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

    Availability is checked when you select these flights.

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1 of 24

Make this trip yours

STL ⇄ DCA

Economy

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Explore this route

All dates for this routeMar 13, 2027 · Return optionsMar 15, 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)
2027-03-14 · one waySouthwest AirlinesWN2546Axel-exclusive $155.002026-10-29T01:28:26Z
2027-03-14 · one wayUnited AirlinesUA1344 + UA4172Axel-exclusive $165.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-15Southwest AirlinesWN2546 / WN1545Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-15United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-16Southwest AirlinesWN2546 / WN754Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-16United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-17Southwest AirlinesWN2546 / WN1008Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-17United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-18Southwest AirlinesWN2546 / WN1008Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-18United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-19Southwest AirlinesWN2546 / WN1008Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-19United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-20Southwest AirlinesWN2546 / WN1008Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-20United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-21Southwest AirlinesWN2546 / WN1548Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-21United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-22Southwest AirlinesWN2546 / WN1545Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-22United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-23Southwest AirlinesWN2546 / WN754Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-23United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-24Southwest AirlinesWN2546 / WN1008Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-24United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-25Southwest AirlinesWN2546 / WN1008Axel-exclusive $285.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-25United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $305.002026-10-29T01:28:26Z
2027-03-14 → 2027-03-26Southwest AirlinesWN2546 / WN1008Axel-exclusive $313.502026-10-29T01:28:26Z
2027-03-14 → 2027-03-26United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $335.502026-10-29T01:28:26Z
2027-03-14 → 2027-03-27Southwest AirlinesWN2546 / WN1008Axel-exclusive $313.502026-10-29T01:28:26Z
2027-03-14 → 2027-03-27United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $335.502026-10-29T01:28:26Z
2027-03-14 → 2027-03-28Southwest AirlinesWN2546 / WN1548Axel-exclusive $337.502026-10-29T01:28:26Z
2027-03-14 → 2027-03-28United AirlinesUA1344 + UA4172 / UA1793 + UA3556Axel-exclusive $359.502026-10-29T01:28:26Z

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

2027-03-14 · one way · Axel-exclusive $155.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.

2027-03-14 · one way · Axel-exclusive $165.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.

2027-03-14 → 2027-03-15 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1545: DCA 2027-03-15 08:25:00 → STL 2027-03-15 09:55:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-15 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-15 06:30:00 → STL 2027-03-15 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-15 06:30:00 → ORD 2027-03-15 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-15 09:00:00 → STL 2027-03-15 10:42:00.

2027-03-14 → 2027-03-16 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN754: DCA 2027-03-16 14:40:00 → STL 2027-03-16 16:05:00; nonstop; 145 minutes. Local airport times.

2027-03-14 → 2027-03-16 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-16 06:30:00 → STL 2027-03-16 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-16 06:30:00 → ORD 2027-03-16 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-16 09:00:00 → STL 2027-03-16 10:42:00.

2027-03-14 → 2027-03-17 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1008: DCA 2027-03-17 12:00:00 → STL 2027-03-17 13:30:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-17 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-17 06:30:00 → STL 2027-03-17 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-17 06:30:00 → ORD 2027-03-17 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-17 09:00:00 → STL 2027-03-17 10:42:00.

2027-03-14 → 2027-03-18 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1008: DCA 2027-03-18 12:00:00 → STL 2027-03-18 13:30:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-18 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-18 06:30:00 → STL 2027-03-18 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-18 06:30:00 → ORD 2027-03-18 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-18 09:00:00 → STL 2027-03-18 10:42:00.

2027-03-14 → 2027-03-20 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1008: DCA 2027-03-20 12:00:00 → STL 2027-03-20 13:30:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-20 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-20 06:30:00 → STL 2027-03-20 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-20 06:30:00 → ORD 2027-03-20 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-20 09:00:00 → STL 2027-03-20 10:42:00.

2027-03-14 → 2027-03-21 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1548: DCA 2027-03-21 18:45:00 → STL 2027-03-21 20:10:00; nonstop; 145 minutes. Local airport times.

2027-03-14 → 2027-03-21 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-21 06:30:00 → STL 2027-03-21 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-21 06:30:00 → ORD 2027-03-21 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-21 09:00:00 → STL 2027-03-21 10:42:00.

2027-03-14 → 2027-03-22 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1545: DCA 2027-03-22 08:25:00 → STL 2027-03-22 09:55:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-22 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-22 06:30:00 → STL 2027-03-22 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-22 06:30:00 → ORD 2027-03-22 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-22 09:00:00 → STL 2027-03-22 10:42:00.

2027-03-14 → 2027-03-24 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1008: DCA 2027-03-24 12:00:00 → STL 2027-03-24 13:30:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-24 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-24 06:30:00 → STL 2027-03-24 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-24 06:30:00 → ORD 2027-03-24 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-24 09:00:00 → STL 2027-03-24 10:42:00.

2027-03-14 → 2027-03-25 · Axel-exclusive $285.00

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1008: DCA 2027-03-25 12:00:00 → STL 2027-03-25 13:30:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-25 · Axel-exclusive $305.00

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-25 06:30:00 → STL 2027-03-25 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-25 06:30:00 → ORD 2027-03-25 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-25 09:00:00 → STL 2027-03-25 10:42:00.

2027-03-14 → 2027-03-26 · Axel-exclusive $313.50

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1008: DCA 2027-03-26 12:00:00 → STL 2027-03-26 13:30:00; nonstop; 150 minutes. Local airport times.

2027-03-14 → 2027-03-26 · Axel-exclusive $335.50

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-26 06:30:00 → STL 2027-03-26 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-26 06:30:00 → ORD 2027-03-26 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-26 09:00:00 → STL 2027-03-26 10:42:00.

2027-03-14 → 2027-03-28 · Axel-exclusive $337.50

  • Southwest Airlines WN2546: STL 2027-03-14 11:10:00 → DCA 2027-03-14 14:10:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1548: DCA 2027-03-28 18:45:00 → STL 2027-03-28 20:10:00; nonstop; 145 minutes. Local airport times.

2027-03-14 → 2027-03-28 · Axel-exclusive $359.50

  • United Airlines UA1344 / UA4172: STL 2027-03-14 06:00:00 → DCA 2027-03-14 12:29:00; 1 stop(s) via EWR; 329 minutes. Local airport times.
    • UA1344: STL 2027-03-14 06:00:00 → EWR 2027-03-14 09:21:00; layover at EWR: 99 minutes.
    • UA4172: EWR 2027-03-14 11:00:00 → DCA 2027-03-14 12:29:00.
  • United Airlines UA1793 / UA3556: DCA 2027-03-28 06:30:00 → STL 2027-03-28 10:42:00; 1 stop(s) via ORD; 312 minutes. Local airport times.
    • UA1793: DCA 2027-03-28 06:30:00 → ORD 2027-03-28 07:52:00; layover at ORD: 68 minutes.
    • UA3556: ORD 2027-03-28 09:00:00 → STL 2027-03-28 10:42:00.

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For AI assistants

  • This page: Saint Louis (STL) to Washington (DCA) · Mar 14, 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. 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.