American Airlines flights from Seattle to Liberia (Costa Rica)

Recent searches for flights from Seattle to Liberia (Costa Rica)

Sep 2026
From$661*
Updated: 6 hours ago
Round tripIEconomy
Oct 2026
From$626*
Updated: 6 hours ago
Round tripIEconomy
Nov 2026
From$651*
Updated: 6 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $651
cmp-daily-histogram-bars-legend-max-price-aria-label $3.0K
Displaying fares for September-2026
  • SEA–LIR: cmp-view-offers-disclaimer. Find Offers
    08

    Tu

    SEP

  • SEA–LIR, 09/09/26 – 09/16/26: From $998
    09

    We

  • SEA–LIR, 09/10/26 – 09/17/26: From $988
    10

    Th

  • SEA–LIR, 09/11/26 – 09/18/26: From $988
    11

    Fr

  • SEA–LIR, 09/12/26 – 09/19/26: From $988
    12

    Sa

  • SEA–LIR, 09/13/26 – 09/20/26: From $993
    13

    Su

  • SEA–LIR, 09/14/26 – 09/21/26: From $988
    14

    Mo

  • SEA–LIR, 09/15/26 – 09/22/26: From $913
    15

    Tu

  • SEA–LIR, 09/16/26 – 09/23/26: From $918
    16

    We

  • SEA–LIR, 09/17/26 – 09/24/26: From $908
    17

    Th

  • SEA–LIR, 09/18/26 – 09/25/26: From $908
    18

    Fr

  • SEA–LIR, 09/19/26 – 09/26/26: From $908
    19

    Sa

  • SEA–LIR, 09/20/26 – 09/27/26: From $913
    20

    Su

  • SEA–LIR, 09/21/26 – 09/28/26: From $913
    21

    Mo

  • SEA–LIR, 09/22/26 – 09/29/26: From $732
    22

    Tu

  • SEA–LIR, 09/23/26 – 09/30/26: From $3,018
    23

    We

  • SEA–LIR, 09/24/26 – 10/01/26: From $727
    24

    Th

  • SEA–LIR, 09/25/26 – 10/02/26: From $727
    25

    Fr

  • SEA–LIR, 09/26/26 – 10/03/26: From $752
    26

    Sa

  • SEA–LIR, 09/27/26 – 10/04/26: From $757
    27

    Su

  • SEA–LIR, 09/28/26 – 10/05/26: From $757
    28

    Mo

  • SEA–LIR, 09/29/26 – 10/06/26: From $865
    29

    Tu

  • SEA–LIR, 09/30/26 – 10/07/26: From $661
    30

    We

  • SEA–LIR, 10/01/26 – 10/08/26: From $651
    01

    Th

    OCT

  • SEA–LIR, 10/02/26 – 10/09/26: From $651
    02

    Fr

  • SEA–LIR, 10/03/26 – 10/10/26: From $651
    03

    Sa

  • SEA–LIR, 10/04/26 – 10/11/26: From $656
    04

    Su

  • SEA–LIR, 10/05/26 – 10/12/26: From $656
    05

    Mo

  • SEA–LIR, 10/06/26 – 10/13/26: From $656
    06

    Tu

  • SEA–LIR, 10/07/26 – 10/14/26: From $2,973
    07

    We

    • range$651-$3,018

    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 Seattle to Liberia (Costa Rica) flights

    $
    keyboard_arrow_down

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    01/05/27 - 01/12/27

    Round trip

    Economy

    from
    $626Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $626Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $631Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    12/03/26 - 12/10/26

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    11/16/26 - 11/23/26

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    11/27/26 - 12/04/26

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    10/23/26 - 10/30/26

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 6 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    10/30/26 - 11/06/26

    Round trip

    Economy

    from
    $651Fare 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 Seattle to Liberia (Costa Rica)

    Looking for lower fares on your trip from Seattle 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.
    • 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 Seattle to Liberia (Costa Rica)