American Airlines flights from Saint Louis to Seattle

Recent searches for flights from Saint Louis to Seattle

Sep 2026
From$420*
Updated: 4 hours ago
Round tripIEconomy
Oct 2026
From$217*
Updated: 4 hours ago
Round tripIEconomy
Nov 2026
From$217*
Updated: 4 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $258
cmp-daily-histogram-bars-legend-max-price-aria-label $589
Displaying fares for September-2026
  • STL–SEA, 09/16/26 – 09/23/26: From $451
    16

    We

    SEP

  • STL–SEA, 09/17/26 – 09/24/26: From $451
    17

    Th

  • STL–SEA, 09/18/26 – 09/25/26: From $451
    18

    Fr

  • STL–SEA, 09/19/26 – 09/26/26: From $451
    19

    Sa

  • STL–SEA, 09/20/26 – 09/27/26: From $451
    20

    Su

  • STL–SEA, 09/21/26 – 09/28/26: From $451
    21

    Mo

  • STL–SEA, 09/22/26 – 09/29/26: From $451
    22

    Tu

  • STL–SEA, 09/23/26 – 09/30/26: From $451
    23

    We

  • STL–SEA, 09/24/26 – 10/01/26: From $451
    24

    Th

  • STL–SEA, 09/25/26 – 10/02/26: From $451
    25

    Fr

  • STL–SEA, 09/26/26 – 10/03/26: From $451
    26

    Sa

  • STL–SEA, 09/27/26 – 10/04/26: From $451
    27

    Su

  • STL–SEA, 09/28/26 – 10/05/26: From $451
    28

    Mo

  • STL–SEA, 09/29/26 – 10/06/26: From $420
    29

    Tu

  • STL–SEA, 09/30/26 – 10/07/26: From $420
    30

    We

  • STL–SEA, 10/01/26 – 10/08/26: From $589
    01

    Th

    OCT

  • STL–SEA, 10/02/26 – 10/09/26: From $480
    02

    Fr

  • STL–SEA, 10/03/26 – 10/10/26: From $420
    03

    Sa

  • STL–SEA, 10/04/26 – 10/06/26: From $438
    04

    Su

  • STL–SEA, 10/05/26 – 10/12/26: From $341
    05

    Mo

  • STL–SEA, 10/06/26 – 10/13/26: From $299
    06

    Tu

  • STL–SEA, 10/07/26 – 10/14/26: From $299
    07

    We

  • STL–SEA, 10/08/26 – 10/15/26: From $284
    08

    Th

  • STL–SEA, 10/09/26 – 10/16/26: From $347
    09

    Fr

  • STL–SEA, 10/10/26 – 10/17/26: From $258
    10

    Sa

  • STL–SEA, 10/11/26 – 10/18/26: From $427
    11

    Su

  • STL–SEA, 10/12/26 – 10/19/26: From $284
    12

    Mo

  • STL–SEA, 10/13/26 – 10/20/26: From $258
    13

    Tu

  • STL–SEA: cmp-view-offers-disclaimer. Find Offers
    14

    We

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

    Th

    • range$258-$589

    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 Saint Louis to Seattle flights

    $
    keyboard_arrow_down

    Saint Louis (STL)to

    Seattle (SEA)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    12/08/26 - 12/15/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    11/11/26 - 11/18/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Seattle (SEA)
    10/31/26 - 11/07/26

    Round trip

    Economy

    from
    $217Fare subject to changes
    Updated: 4 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.

    Citi / AAdvantage credit card offer.