American Airlines flights from Portland, OR to Saint Louis

Recent searches for flights from Portland, OR to Saint Louis

Sep 2026
From$350*
Updated: 15 hours ago
Round tripIEconomy
Oct 2026
From$253*
Updated: 15 hours ago
Round tripIEconomy
Nov 2026
From$253*
Updated: 15 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $253
cmp-daily-histogram-bars-legend-max-price-aria-label $550
Displaying fares for September-2026
  • PDX–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Tu

    SEP

  • PDX–STL, 09/16/26 – 09/23/26: From $451
    16

    We

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

    Th

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

    Fr

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

    Sa

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

    Su

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

    Mo

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

    Tu

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

    We

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

    Th

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

    Fr

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

    Sa

  • PDX–STL, 09/27/26 – 10/04/26: From $550
    27

    Su

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

    Mo

  • PDX–STL, 09/29/26 – 10/06/26: From $350
    29

    Tu

  • PDX–STL, 09/30/26 – 10/07/26: From $350
    30

    We

  • PDX–STL, 10/01/26 – 10/08/26: From $467
    01

    Th

    OCT

  • PDX–STL, 10/02/26 – 10/09/26: From $418
    02

    Fr

  • PDX–STL, 10/03/26 – 10/10/26: From $350
    03

    Sa

  • PDX–STL, 10/04/26 – 10/11/26: From $418
    04

    Su

  • PDX–STL, 10/05/26 – 10/12/26: From $505
    05

    Mo

  • PDX–STL, 10/06/26 – 10/13/26: From $253
    06

    Tu

  • PDX–STL, 10/07/26 – 10/14/26: From $367
    07

    We

  • PDX–STL, 10/08/26 – 10/15/26: From $378
    08

    Th

  • PDX–STL, 10/09/26 – 10/16/26: From $321
    09

    Fr

  • PDX–STL, 10/10/26 – 10/17/26: From $253
    10

    Sa

  • PDX–STL, 10/11/26 – 10/18/26: From $389
    11

    Su

  • PDX–STL, 10/12/26 – 10/19/26: From $287
    12

    Mo

  • PDX–STL, 10/13/26 – 10/22/26: From $327
    13

    Tu

  • PDX–STL, 10/14/26 – 10/22/26: From $270
    14

    We

    • range$253-$550

    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 Portland, OR to Saint Louis flights

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    Portland, OR (PDX)to

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

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    12/02/26 - 12/09/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    11/17/26 - 11/24/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    11/18/26 - 11/25/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    10/06/26 - 10/13/26

    Round trip

    Economy

    from
    $253Fare subject to changes
    Updated: 15 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.

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