American Airlines flights from Phoenix to Saint Louis

Recent searches for flights from Phoenix to Saint Louis

Aug 2026
From$378*
Updated: 14 hours ago
Round tripIEconomy
Sep 2026
From$378*
Updated: 22 hours ago
Round tripIEconomy
Oct 2026
From$402*
Updated: 14 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $378
cmp-daily-histogram-bars-legend-max-price-aria-label $653
Displaying fares for August-2026
  • PHX–STL, 08/06/26 – 08/07/26: From $653
    06

    Th

    AUG

  • PHX–STL, 08/07/26 – 08/14/26: From $653
    07

    Fr

  • PHX–STL, 08/08/26 – 09/30/26: From $482
    08

    Sa

  • PHX–STL, 08/09/26 – 08/16/26: From $653
    09

    Su

  • PHX–STL, 08/10/26 – 08/17/26: From $653
    10

    Mo

  • PHX–STL, 08/11/26 – 08/18/26: From $561
    11

    Tu

  • PHX–STL, 08/12/26 – 08/31/26: From $482
    12

    We

  • PHX–STL, 08/13/26 – 08/22/26: From $607
    13

    Th

  • PHX–STL, 08/14/26 – 08/21/26: From $641
    14

    Fr

  • PHX–STL, 08/15/26 – 08/22/26: From $561
    15

    Sa

  • PHX–STL, 08/16/26 – 08/23/26: From $641
    16

    Su

  • PHX–STL, 08/17/26 – 08/31/26: From $414
    17

    Mo

  • PHX–STL, 08/18/26 – 09/15/26: From $482
    18

    Tu

  • PHX–STL, 08/19/26 – 08/23/26: From $405
    19

    We

  • PHX–STL, 08/20/26 – 08/27/26: From $516
    20

    Th

  • PHX–STL, 08/21/26 – 08/23/26: From $405
    21

    Fr

  • PHX–STL, 08/22/26 – 08/29/26: From $482
    22

    Sa

  • PHX–STL, 08/23/26 – 08/30/26: From $579
    23

    Su

  • PHX–STL, 08/24/26 – 08/31/26: From $516
    24

    Mo

  • PHX–STL, 08/25/26 – 09/01/26: From $490
    25

    Tu

  • PHX–STL, 08/26/26 – 09/02/26: From $403
    26

    We

  • PHX–STL, 08/27/26 – 09/03/26: From $403
    27

    Th

  • PHX–STL, 08/28/26 – 09/04/26: From $451
    28

    Fr

  • PHX–STL, 08/29/26 – 09/05/26: From $378
    29

    Sa

  • PHX–STL, 08/30/26 – 09/06/26: From $441
    30

    Su

  • PHX–STL, 08/31/26 – 09/07/26: From $403
    31

    Mo

  • PHX–STL, 09/01/26 – 09/08/26: From $411
    01

    Tu

    SEP

  • PHX–STL, 09/02/26 – 09/09/26: From $403
    02

    We

  • PHX–STL, 09/03/26 – 09/06/26: From $378
    03

    Th

  • PHX–STL, 09/04/26 – 09/08/26: From $406
    04

    Fr

  • PHX–STL: cmp-view-offers-disclaimer. Find Offers
    05

    Sa

    • range$378-$653

    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 Phoenix to Saint Louis flights

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    Phoenix (PHX)to

    Saint Louis (STL)
    08/29/26 - 09/05/26

    Round trip

    Economy

    from
    $378Fare subject to changes
    Updated: 14 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    09/03/26 - 09/06/26

    Round trip

    Economy

    from
    $378Fare subject to changes
    Updated: 22 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    09/11/26 - 09/14/26

    Round trip

    Economy

    from
    $386Fare subject to changes
    Updated: 21 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    10/23/26 - 10/30/26

    Round trip

    Economy

    from
    $402Fare subject to changes
    Updated: 14 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    10/30/26 - 11/06/26

    Round trip

    Economy

    from
    $402Fare subject to changes
    Updated: 14 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    09/11/26 - 09/18/26

    Round trip

    Economy

    from
    $402Fare subject to changes
    Updated: 14 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    09/10/26 - 09/14/26

    Round trip

    Economy

    from
    $402Fare subject to changes
    Updated: 14 hours ago

    Phoenix (PHX)to

    Saint Louis (STL)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $403Fare subject to changes
    Updated: 14 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 Phoenix to Saint Louis

    Looking for lower fares on your trip from Phoenix 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 Phoenix to Saint Louis