American Airlines flights from Washington, D.C. to Saint Louis

Recent searches for flights from Washington, D.C. to Saint Louis

Aug 2026
From$395*
Updated: 2 hours ago
Round tripIEconomy
Sep 2026
From$217*
Updated: 5 hours ago
Round tripIEconomy
Oct 2026
From$217*
Updated: 6 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $217
cmp-daily-histogram-bars-legend-max-price-aria-label $473
Displaying fares for August-2026
  • WAS–STL, 08/19/26 – 08/26/26: From $445
    19

    We

    AUG

  • WAS–STL, 08/20/26 – 08/27/26: From $473
    20

    Th

  • WAS–STL, 08/21/26 – 08/28/26: From $473
    21

    Fr

  • DCA–STL, 08/22/26 – 11/24/26: From $395
    22

    Sa

  • WAS–STL, 08/23/26 – 08/30/26: From $473
    23

    Su

  • WAS–STL, 08/24/26 – 08/31/26: From $473
    24

    Mo

  • WAS–STL, 08/25/26 – 09/01/26: From $445
    25

    Tu

  • WAS–STL, 08/26/26 – 09/02/26: From $445
    26

    We

  • WAS–STL, 08/27/26 – 09/03/26: From $473
    27

    Th

  • WAS–STL, 08/28/26 – 09/04/26: From $473
    28

    Fr

  • WAS–STL, 08/29/26 – 09/05/26: From $465
    29

    Sa

  • IAD–STL, 08/30/26 – 09/08/26: From $409
    30

    Su

  • WAS–STL, 08/31/26 – 09/07/26: From $473
    31

    Mo

  • DCA–STL, 09/01/26 – 09/08/26: From $341
    01

    Tu

    SEP

  • DCA–STL, 09/02/26 – 09/09/26: From $341
    02

    We

  • WAS–STL, 09/03/26 – 09/10/26: From $358
    03

    Th

  • WAS–STL, 09/04/26 – 09/11/26: From $377
    04

    Fr

  • WAS–STL, 09/05/26 – 09/12/26: From $295
    05

    Sa

  • DCA–STL, 09/06/26 – 09/13/26: From $370
    06

    Su

  • WAS–STL, 09/07/26 – 09/14/26: From $358
    07

    Mo

  • WAS–STL, 09/08/26 – 09/15/26: From $217
    08

    Tu

  • DCA–STL, 09/09/26 – 09/16/26: From $217
    09

    We

  • WAS–STL, 09/10/26 – 09/17/26: From $217
    10

    Th

  • DCA–STL, 09/11/26 – 09/18/26: From $255
    11

    Fr

  • WAS–STL, 09/12/26 – 09/19/26: From $217
    12

    Sa

  • DCA–STL, 09/13/26 – 09/14/26: From $292
    13

    Su

  • DCA–STL, 09/14/26 – 09/21/26: From $217
    14

    Mo

  • WAS–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Tu

  • WAS–STL: cmp-view-offers-disclaimer. Find Offers
    16

    We

  • IAD–STL, 09/17/26 – 09/20/26: From $264
    17

    Th

  • DCA–STL, 09/18/26 – 09/25/26: From $265
    18

    Fr

    • range$217-$473

    DisclaimerFares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Fares listed may be Basic Economy, which class is subject to additional terms and conditions. Additional baggage fees and charges for optional products and services may apply.

    Find deals on Washington, D.C. to Saint Louis flights

    $
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    Washington, D.C. (WAS)to

    Saint Louis (STL)
    10/01/26 - 10/08/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    10/07/26 - 10/14/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    10/12/26 - 10/19/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    09/10/26 - 09/17/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    09/14/26 - 09/21/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    09/19/26 - 09/26/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    Washington, D.C. (WAS)to

    Saint Louis (STL)
    09/21/26 - 09/28/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 5 hours ago

    *Fares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Some fares listed may include one or more connections that are Basic Economy, which class is subject to additional terms and conditions. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Additional baggage fees and charges for optional products and services may apply.

    Finding cheap flights from Washington, D.C. to Saint Louis

    Looking for lower fares on your trip from Washington, D.C. to Saint Louis? Here are a few ways to save.

    • Book early: Booking 1 to 3 months ahead can help you find lower fares
    • Be flexible with dates: Midweek travel, like Tuesdays and Wednesdays, can be more affordable
    • Travel during less busy periods: Flying outside peak travel times can help find lower fares and avoid crowds

    Earn up to $500 back on your next American Airlines flight plus, 30,000 bonus miles. Offers vary elsewhere. Opens another site in a new window that may not meet accessibility guidelines.

    Upgrade your flight with Main Cabin Extra

    Make your trip more comfortable with Main Cabin Extra. Enjoy benefits like:

    • Extra legroom: More space with seats at the front of the Main Cabin or in exit rows.
    • Early boarding: Preferred Group 5 boarding allows easier access to overhead bins.
    • Complimentary drinks: Enjoy beer, wine and spirits on flights with full beverage service.

    Discover how Main Cabin Extra can enhance your trip.

    American Airlines flights from Washington, D.C. to Saint Louis