American Airlines flights from Harlingen to Saint Louis

Recent searches for flights from Harlingen to Saint Louis

Aug 2026
From$325*
Updated: 7 minutes ago
Round tripIEconomy
Sep 2026
From$285*
Updated: 7 minutes ago
Round tripIEconomy
Oct 2026
From$285*
Updated: 7 minutes ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $305
cmp-daily-histogram-bars-legend-max-price-aria-label $569
Displaying fares for August-2026
  • HRL–STL, 08/05/26 – 08/12/26: From $449
    05

    We

    AUG

  • HRL–STL, 08/06/26 – 08/13/26: From $569
    06

    Th

  • HRL–STL, 08/07/26 – 08/14/26: From $569
    07

    Fr

  • HRL–STL, 08/08/26 – 08/15/26: From $449
    08

    Sa

  • HRL–STL, 08/09/26 – 08/16/26: From $569
    09

    Su

  • HRL–STL, 08/10/26 – 08/17/26: From $569
    10

    Mo

  • HRL–STL, 08/11/26 – 08/18/26: From $449
    11

    Tu

  • HRL–STL, 08/12/26 – 08/19/26: From $397
    12

    We

  • HRL–STL, 08/13/26 – 08/20/26: From $424
    13

    Th

  • HRL–STL, 08/14/26 – 08/21/26: From $424
    14

    Fr

  • HRL–STL, 08/15/26 – 08/22/26: From $397
    15

    Sa

  • HRL–STL, 08/16/26 – 08/23/26: From $509
    16

    Su

  • HRL–STL, 08/17/26 – 08/24/26: From $424
    17

    Mo

  • HRL–STL, 08/18/26 – 08/25/26: From $387
    18

    Tu

  • HRL–STL, 08/19/26 – 08/26/26: From $325
    19

    We

  • HRL–STL, 08/20/26 – 08/27/26: From $399
    20

    Th

  • HRL–STL, 08/21/26 – 08/28/26: From $354
    21

    Fr

  • HRL–STL, 08/22/26 – 08/29/26: From $387
    22

    Sa

  • HRL–STL, 08/23/26 – 08/30/26: From $399
    23

    Su

  • HRL–STL, 08/24/26 – 08/31/26: From $354
    24

    Mo

  • HRL–STL, 08/25/26 – 09/01/26: From $325
    25

    Tu

  • HRL–STL, 08/26/26 – 09/02/26: From $325
    26

    We

  • HRL–STL, 08/27/26 – 09/03/26: From $329
    27

    Th

  • HRL–STL, 08/28/26 – 09/04/26: From $430
    28

    Fr

  • HRL–STL, 08/29/26 – 09/05/26: From $342
    29

    Sa

  • HRL–STL, 08/30/26 – 09/06/26: From $327
    30

    Su

  • HRL–STL, 08/31/26 – 09/07/26: From $329
    31

    Mo

  • HRL–STL, 09/01/26 – 09/08/26: From $305
    01

    Tu

    SEP

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

    We

  • HRL–STL: cmp-view-offers-disclaimer. Find Offers
    03

    Th

  • HRL–STL, 09/04/26 – 09/11/26: From $412
    04

    Fr

    • range$305-$569

    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)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

    Saint Louis (STL)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

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

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

    Saint Louis (STL)
    09/05/26 - 09/12/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

    Saint Louis (STL)
    09/15/26 - 09/22/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

    Saint Louis (STL)
    09/22/26 - 09/29/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 minutes ago

    Harlingen (HRL)to

    Saint Louis (STL)
    09/16/26 - 09/23/26

    Round trip

    Economy

    from
    $285Fare subject to changes
    Updated: 7 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.

    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