American Airlines flights from Saint Louis to Portland, OR

Recent searches for flights from Saint Louis to Portland, OR

Aug 2026
From$343*
Updated: 4 hours ago
Round tripIEconomy
Sep 2026
From$337*
Updated: 4 hours ago
Round tripIEconomy
Oct 2026
From$337*
Updated: 4 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $343
cmp-daily-histogram-bars-legend-max-price-aria-label $595
Displaying fares for August-2026
  • STL–PDX, 08/05/26 – 08/12/26: From $451
    05

    We

    AUG

  • STL–PDX, 08/06/26 – 08/13/26: From $595
    06

    Th

  • STL–PDX, 08/07/26 – 08/14/26: From $451
    07

    Fr

  • STL–PDX, 08/08/26 – 08/15/26: From $582
    08

    Sa

  • STL–PDX, 08/09/26 – 08/16/26: From $451
    09

    Su

  • STL–PDX, 08/10/26 – 08/17/26: From $451
    10

    Mo

  • STL–PDX, 08/11/26 – 08/18/26: From $451
    11

    Tu

  • STL–PDX, 08/12/26 – 08/19/26: From $451
    12

    We

  • STL–PDX, 08/13/26 – 08/20/26: From $510
    13

    Th

  • STL–PDX, 08/14/26 – 08/21/26: From $451
    14

    Fr

  • STL–PDX, 08/15/26 – 08/22/26: From $451
    15

    Sa

  • STL–PDX, 08/16/26 – 08/23/26: From $451
    16

    Su

  • STL–PDX, 08/17/26 – 08/24/26: From $451
    17

    Mo

  • STL–PDX, 08/18/26 – 08/25/26: From $451
    18

    Tu

  • STL–PDX, 08/19/26 – 08/26/26: From $378
    19

    We

  • STL–PDX, 08/20/26 – 08/27/26: From $434
    20

    Th

  • STL–PDX, 08/21/26 – 08/28/26: From $378
    21

    Fr

  • STL–PDX, 08/22/26 – 08/29/26: From $378
    22

    Sa

  • STL–PDX, 08/23/26 – 08/30/26: From $378
    23

    Su

  • STL–PDX, 08/24/26 – 08/31/26: From $378
    24

    Mo

  • STL–PDX, 08/25/26 – 09/01/26: From $378
    25

    Tu

  • STL–PDX, 08/26/26 – 09/02/26: From $349
    26

    We

  • STL–PDX, 08/27/26 – 09/03/26: From $349
    27

    Th

  • STL–PDX, 08/28/26 – 09/04/26: From $349
    28

    Fr

  • STL–PDX, 08/29/26 – 09/05/26: From $343
    29

    Sa

  • STL–PDX, 08/30/26 – 09/06/26: From $349
    30

    Su

  • STL–PDX, 08/31/26 – 09/07/26: From $442
    31

    Mo

  • STL–PDX, 09/01/26 – 09/08/26: From $343
    01

    Tu

    SEP

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    02

    We

  • STL–PDX, 09/03/26 – 09/06/26: From $442
    03

    Th

  • STL–PDX, 09/04/26 – 09/11/26: From $428
    04

    Fr

    • range$343-$595

    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 Portland, OR flights

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    Saint Louis (STL)to

    Portland, OR (PDX)
    10/27/26 - 11/03/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    10/31/26 - 11/07/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    10/14/26 - 10/21/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    09/05/26 - 09/12/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    09/09/26 - 09/16/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    09/19/26 - 09/26/26

    Round trip

    Economy

    from
    $337Fare subject to changes
    Updated: 4 hours ago

    Saint Louis (STL)to

    Portland, OR (PDX)
    09/29/26 - 10/06/26

    Round trip

    Economy

    from
    $337Fare 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.

    Finding cheap flights from Saint Louis to Portland, OR

    Looking for lower fares on your trip from Saint Louis to Portland, OR? 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 Saint Louis to Portland, OR