American Airlines flights from Harlingen to Saint Louis

Recent searches for flights from Harlingen to Saint Louis

Aug 2026
From$449*
Updated: 1 hour ago
Round tripIEconomy
Sep 2026
From$285*
Updated: 1 hour ago
Round tripIEconomy
Oct 2026
From$285*
Updated: 1 hour ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $307
cmp-daily-histogram-bars-legend-max-price-aria-label $832
Displaying fares for August-2026
  • HRL–STL, 08/28/26 – 09/04/26: From $625
    28

    Fr

    AUG

  • HRL–STL, 08/29/26 – 09/05/26: From $449
    29

    Sa

  • HRL–STL, 08/30/26 – 09/06/26: From $574
    30

    Su

  • HRL–STL, 08/31/26 – 09/07/26: From $569
    31

    Mo

  • HRL–STL, 09/01/26 – 09/08/26: From $449
    01

    Tu

    SEP

  • HRL–STL, 09/02/26 – 09/09/26: From $449
    02

    We

  • HRL–STL, 09/03/26 – 09/10/26: From $569
    03

    Th

  • HRL–STL, 09/04/26 – 09/11/26: From $579
    04

    Fr

  • HRL–STL, 09/05/26 – 09/12/26: From $325
    05

    Sa

  • HRL–STL, 09/06/26 – 09/13/26: From $509
    06

    Su

  • HRL–STL, 09/07/26 – 09/14/26: From $832
    07

    Mo

  • HRL–STL, 09/08/26 – 09/15/26: From $407
    08

    Tu

  • HRL–STL, 09/09/26 – 09/16/26: From $325
    09

    We

  • HRL–STL, 09/10/26 – 09/17/26: From $529
    10

    Th

  • HRL–STL, 09/11/26 – 09/18/26: From $413
    11

    Fr

  • HRL–STL, 09/12/26 – 09/19/26: From $389
    12

    Sa

  • HRL–STL, 09/13/26 – 09/20/26: From $499
    13

    Su

  • HRL–STL, 09/14/26 – 09/21/26: From $354
    14

    Mo

  • HRL–STL, 09/15/26 – 09/22/26: From $347
    15

    Tu

  • HRL–STL, 09/16/26 – 09/23/26: From $347
    16

    We

  • HRL–STL, 09/17/26 – 09/24/26: From $413
    17

    Th

  • HRL–STL, 09/18/26 – 09/25/26: From $354
    18

    Fr

  • HRL–STL, 09/19/26 – 09/26/26: From $407
    19

    Sa

  • HRL–STL, 09/20/26 – 09/27/26: From $499
    20

    Su

  • HRL–STL, 09/21/26 – 09/28/26: From $413
    21

    Mo

  • HRL–STL, 09/22/26 – 09/29/26: From $307
    22

    Tu

  • HRL–STL, 09/23/26 – 09/30/26: From $307
    23

    We

  • HRL–STL, 09/24/26 – 10/01/26: From $329
    24

    Th

  • HRL–STL: cmp-view-offers-disclaimer. Find Offers
    25

    Fr

  • HRL–STL: cmp-view-offers-disclaimer. Find Offers
    26

    Sa

  • HRL–STL, 09/27/26 – 10/04/26: From $398
    27

    Su

    • range$307-$832

    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 Harlingen to Saint Louis flights

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    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

    Saint Louis (STL)
    09/30/26 - 10/07/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 1 hour 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 Harlingen to Saint Louis

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