American Airlines flights from Philadelphia to Saint Louis

Recent searches for flights from Philadelphia to Saint Louis

Sep 2026
From$493*
Updated: 37 minutes ago
Round tripIEconomy
Oct 2026
From$299*
Updated: 37 minutes ago
Round tripIEconomy
Nov 2026
From$299*
Updated: 37 minutes ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $299
cmp-daily-histogram-bars-legend-max-price-aria-label $677
Displaying fares for September-2026
  • PHL–STL, 09/15/26 – 09/16/26: From $607
    15

    Tu

    SEP

  • PHL–STL, 09/16/26 – 09/23/26: From $607
    16

    We

  • PHL–STL, 09/17/26 – 09/24/26: From $677
    17

    Th

  • PHL–STL, 09/18/26 – 09/25/26: From $677
    18

    Fr

  • PHL–STL, 09/19/26 – 09/26/26: From $607
    19

    Sa

  • PHL–STL, 09/20/26 – 09/27/26: From $677
    20

    Su

  • PHL–STL, 09/21/26 – 09/24/26: From $664
    21

    Mo

  • PHL–STL, 09/22/26 – 09/29/26: From $607
    22

    Tu

  • PHL–STL, 09/23/26 – 09/30/26: From $607
    23

    We

  • PHL–STL, 09/24/26 – 09/26/26: From $642
    24

    Th

  • PHL–STL, 09/25/26 – 10/02/26: From $659
    25

    Fr

  • PHL–STL, 09/26/26 – 10/03/26: From $607
    26

    Sa

  • PHL–STL, 09/27/26 – 09/29/26: From $642
    27

    Su

  • PHL–STL, 09/28/26 – 10/05/26: From $550
    28

    Mo

  • PHL–STL, 09/29/26 – 10/06/26: From $493
    29

    Tu

  • PHL–STL, 09/30/26 – 10/07/26: From $493
    30

    We

  • PHL–STL, 10/01/26 – 10/08/26: From $532
    01

    Th

    OCT

  • PHL–STL, 10/02/26 – 10/09/26: From $544
    02

    Fr

  • PHL–STL, 10/03/26 – 10/10/26: From $493
    03

    Sa

  • PHL–STL, 10/04/26 – 10/11/26: From $574
    04

    Su

  • PHL–STL, 10/05/26 – 10/12/26: From $343
    05

    Mo

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

    Tu

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

    We

  • PHL–STL, 10/08/26 – 10/15/26: From $343
    08

    Th

  • PHL–STL, 10/09/26 – 10/12/26: From $355
    09

    Fr

  • PHL–STL, 10/10/26 – 10/17/26: From $299
    10

    Sa

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

    Su

  • PHL–STL, 10/12/26 – 10/14/26: From $321
    12

    Mo

  • PHL–STL: cmp-view-offers-disclaimer. Find Offers
    13

    Tu

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

    We

    • range$299-$677

    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 Philadelphia to Saint Louis flights

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    Philadelphia (PHL)to

    Saint Louis (STL)
    12/05/26 - 12/12/26

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

    Saint Louis (STL)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

    Saint Louis (STL)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes ago

    Philadelphia (PHL)to

    Saint Louis (STL)
    12/01/26 - 12/08/26

    Round trip

    Economy

    from
    $299Fare subject to changes
    Updated: 37 minutes 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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