American Airlines flights from Saint Louis to Harrisburg

Recent searches for flights from Saint Louis to Harrisburg

Sep 2026
From$354*
Updated: 6 hours ago
Round tripIEconomy
Oct 2026
From$321*
Updated: 6 hours ago
Round tripIEconomy
Nov 2026
From$321*
Updated: 6 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $330
cmp-daily-histogram-bars-legend-max-price-aria-label $561
Displaying fares for September-2026
  • STL–MDT, 09/12/26 – 09/19/26: From $427
    12

    Sa

    SEP

  • STL–MDT, 09/13/26 – 09/20/26: From $444
    13

    Su

  • STL–MDT, 09/14/26 – 09/21/26: From $444
    14

    Mo

  • STL–MDT, 09/15/26 – 09/22/26: From $427
    15

    Tu

  • STL–MDT, 09/16/26 – 09/23/26: From $427
    16

    We

  • STL–MDT, 09/17/26 – 09/24/26: From $444
    17

    Th

  • STL–MDT, 09/18/26 – 09/20/26: From $429
    18

    Fr

  • STL–MDT, 09/19/26 – 09/26/26: From $398
    19

    Sa

  • STL–MDT, 09/20/26 – 09/27/26: From $399
    20

    Su

  • STL–MDT, 09/21/26 – 09/28/26: From $399
    21

    Mo

  • STL–MDT, 09/22/26 – 09/29/26: From $398
    22

    Tu

  • STL–MDT, 09/23/26 – 09/30/26: From $398
    23

    We

  • STL–MDT, 09/24/26 – 10/01/26: From $399
    24

    Th

  • STL–MDT, 09/25/26 – 10/02/26: From $561
    25

    Fr

  • STL–MDT, 09/26/26 – 10/03/26: From $354
    26

    Sa

  • STL–MDT, 09/27/26 – 10/04/26: From $409
    27

    Su

  • STL–MDT, 09/28/26 – 10/05/26: From $354
    28

    Mo

  • STL–MDT, 09/29/26 – 10/06/26: From $354
    29

    Tu

  • STL–MDT, 09/30/26 – 10/07/26: From $354
    30

    We

  • STL–MDT, 10/01/26 – 10/08/26: From $354
    01

    Th

    OCT

  • STL–MDT, 10/02/26 – 10/09/26: From $479
    02

    Fr

  • STL–MDT, 10/03/26 – 10/10/26: From $339
    03

    Sa

  • STL–MDT, 10/04/26 – 10/11/26: From $409
    04

    Su

  • STL–MDT, 10/05/26 – 10/12/26: From $339
    05

    Mo

  • STL–MDT, 10/06/26 – 10/13/26: From $330
    06

    Tu

  • STL–MDT, 10/07/26 – 10/14/26: From $330
    07

    We

  • STL–MDT, 10/08/26 – 10/15/26: From $339
    08

    Th

  • STL–MDT, 10/09/26 – 10/16/26: From $409
    09

    Fr

  • STL–MDT: cmp-view-offers-disclaimer. Find Offers
    10

    Sa

  • STL–MDT: cmp-view-offers-disclaimer. Find Offers
    11

    Su

    • range$330-$561

    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 Harrisburg flights

    $
    keyboard_arrow_down

    Saint Louis (STL)to

    Harrisburg (MDT)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    12/05/26 - 12/12/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    11/11/26 - 11/18/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 19 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    11/18/26 - 11/25/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 hours ago

    Saint Louis (STL)to

    Harrisburg (MDT)
    11/25/26 - 12/02/26

    Round trip

    Economy

    from
    $321Fare subject to changes
    Updated: 6 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 Harrisburg

    Looking for lower fares on your trip from Saint Louis to Harrisburg? 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

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    • 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.
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    Discover how Main Cabin Extra can enhance your trip.

    American Airlines flights from Saint Louis to Harrisburg