American Airlines flights from Portland, OR to Saint Louis

Recent searches for flights from Portland, OR to Saint Louis

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Mar 2026
No results available
Apr 2026
From$237*
Updated: 12 minutes ago
Round tripIEconomy
May 2026
From$302*
Updated: 4 hours ago
Round tripIEconomy
$480
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    • range$480

    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)
    04/19/26 - 04/25/26

    Round trip

    Economy

    from
    $237Fare subject to changes
    Updated: 23 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    04/20/26 - 04/25/26

    Round trip

    Economy

    from
    $237Fare subject to changes
    Updated: 12 minutes ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    04/25/26 - 05/01/26

    Round trip

    Economy

    from
    $282Fare subject to changes
    Updated: 9 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    05/07/26 - 05/13/26

    Round trip

    Economy

    from
    $302Fare subject to changes
    Updated: 4 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    04/26/26 - 05/01/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 9 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    04/04/26 - 04/12/26

    Round trip

    Economy

    from
    $480Fare subject to changes
    Updated: 21 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    06/04/26 - 06/07/26

    Round trip

    Economy

    from
    $505Fare subject to changes
    Updated: 4 hours ago

    Portland, OR (PDX)to

    Saint Louis (STL)
    06/22/26 - 07/02/26

    Round trip

    Economy

    from
    $555Fare subject to changes
    Updated: 2 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.

    American Airlines flights from Portland, OR to Saint Louis

    Earn up to $400 back on your next American Airlines flight plus, 30,000 bonus miles. Terms apply. Opens another site in a new window that may not meet accessibility guidelines.