American Airlines flights from Saint Louis to Liberia (Costa Rica)

Recent searches for flights from Saint Louis to Liberia (Costa Rica)

Sep 2026
From$556*
Updated: 44 minutes ago
Round tripIEconomy
Oct 2026
From$476*
Updated: 44 minutes ago
Round tripIEconomy
Nov 2026
From$546*
Updated: 44 minutes ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $481
cmp-daily-histogram-bars-legend-max-price-aria-label $742
Displaying fares for September-2026
  • STL–LIR, 09/09/26 – 09/16/26: From $642
    09

    We

    SEP

  • STL–LIR, 09/10/26 – 09/17/26: From $637
    10

    Th

  • STL–LIR, 09/11/26 – 09/18/26: From $632
    11

    Fr

  • STL–LIR, 09/12/26 – 09/19/26: From $637
    12

    Sa

  • STL–LIR, 09/13/26 – 09/20/26: From $637
    13

    Su

  • STL–LIR, 09/14/26 – 09/21/26: From $637
    14

    Mo

  • STL–LIR, 09/15/26 – 09/22/26: From $617
    15

    Tu

  • STL–LIR, 09/16/26 – 09/23/26: From $685
    16

    We

  • STL–LIR, 09/17/26 – 09/24/26: From $642
    17

    Th

  • STL–LIR, 09/18/26 – 09/25/26: From $632
    18

    Fr

  • STL–LIR, 09/19/26 – 09/26/26: From $637
    19

    Sa

  • STL–LIR, 09/20/26 – 09/27/26: From $637
    20

    Su

  • STL–LIR, 09/21/26 – 09/28/26: From $632
    21

    Mo

  • STL–LIR, 09/22/26 – 09/29/26: From $667
    22

    Tu

  • STL–LIR, 09/23/26 – 09/30/26: From $742
    23

    We

  • STL–LIR, 09/24/26 – 10/01/26: From $615
    24

    Th

  • STL–LIR, 09/25/26 – 10/02/26: From $605
    25

    Fr

  • STL–LIR, 09/26/26 – 10/03/26: From $619
    26

    Sa

  • STL–LIR, 09/27/26 – 10/04/26: From $619
    27

    Su

  • STL–LIR, 09/28/26 – 10/05/26: From $614
    28

    Mo

  • STL–LIR, 09/29/26 – 10/06/26: From $618
    29

    Tu

  • STL–LIR, 09/30/26 – 10/07/26: From $556
    30

    We

  • STL–LIR, 10/01/26 – 10/08/26: From $551
    01

    Th

    OCT

  • STL–LIR, 10/02/26 – 10/09/26: From $546
    02

    Fr

  • STL–LIR, 10/03/26 – 10/10/26: From $551
    03

    Sa

  • STL–LIR, 10/04/26 – 10/11/26: From $551
    04

    Su

  • STL–LIR, 10/05/26 – 10/12/26: From $546
    05

    Mo

  • STL–LIR, 10/06/26 – 10/13/26: From $481
    06

    Tu

  • STL–LIR, 10/07/26 – 10/14/26: From $625
    07

    We

  • STL–LIR, 10/08/26 – 10/15/26: From $713
    08

    Th

    • range$481-$742

    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 Liberia (Costa Rica) flights

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    keyboard_arrow_down

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    12/10/26 - 12/14/26

    Round trip

    Economy

    from
    $448Fare subject to changes
    Updated: 1 hour ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    10/27/26 - 11/03/26

    Round trip

    Economy

    from
    $476Fare subject to changes
    Updated: 44 minutes ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    10/06/26 - 10/13/26

    Round trip

    Economy

    from
    $481Fare subject to changes
    Updated: 44 minutes ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $481Fare subject to changes
    Updated: 44 minutes ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $481Fare subject to changes
    Updated: 44 minutes ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    12/02/26 - 12/09/26

    Round trip

    Economy

    from
    $481Fare subject to changes
    Updated: 44 minutes ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $481Fare subject to changes
    Updated: 44 minutes ago

    Saint Louis (STL)to

    Liberia (Costa Rica) (LIR)
    01/06/27 - 01/13/27

    Round trip

    Economy

    from
    $481Fare subject to changes
    Updated: 44 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 Saint Louis to Liberia (Costa Rica)

    Looking for lower fares on your trip from Saint Louis to Liberia (Costa Rica)? 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 Liberia (Costa Rica)