American Airlines flights from Seattle to Liberia (Costa Rica)

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

Aug 2026
From$1,001*
Updated: 3 hours ago
Round tripIEconomy
Sep 2026
From$651*
Updated: 3 hours ago
Round tripIEconomy
Oct 2026
From$626*
Updated: 3 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $651
cmp-daily-histogram-bars-legend-max-price-aria-label $3.5K
Displaying fares for August-2026
  • SEA–LIR, 08/20/26 – 08/27/26: From $1,378
    20

    Th

    AUG

  • SEA–LIR, 08/21/26 – 08/28/26: From $1,075
    21

    Fr

  • SEA–LIR, 08/22/26 – 08/29/26: From $1,029
    22

    Sa

  • SEA–LIR, 08/23/26 – 08/30/26: From $1,334
    23

    Su

  • SEA–LIR, 08/24/26 – 08/31/26: From $1,031
    24

    Mo

  • SEA–LIR, 08/25/26 – 09/01/26: From $1,001
    25

    Tu

  • SEA–LIR, 08/26/26 – 09/02/26: From $1,031
    26

    We

  • SEA–LIR, 08/27/26 – 09/03/26: From $1,026
    27

    Th

  • SEA–LIR, 08/28/26 – 09/04/26: From $1,026
    28

    Fr

  • SEA–LIR, 08/29/26 – 09/05/26: From $1,026
    29

    Sa

  • SEA–LIR, 08/30/26 – 09/06/26: From $1,031
    30

    Su

  • SEA–LIR, 08/31/26 – 09/07/26: From $3,485
    31

    Mo

  • SEA–LIR, 09/01/26 – 09/08/26: From $3,089
    01

    Tu

    SEP

  • SEA–LIR, 09/02/26 – 09/09/26: From $3,108
    02

    We

  • SEA–LIR, 09/03/26 – 09/10/26: From $1,194
    03

    Th

  • SEA–LIR, 09/04/26 – 09/11/26: From $1,128
    04

    Fr

  • SEA–LIR, 09/05/26 – 09/12/26: From $1,200
    05

    Sa

  • SEA–LIR, 09/06/26 – 09/13/26: From $1,140
    06

    Su

  • SEA–LIR, 09/07/26 – 09/14/26: From $841
    07

    Mo

  • SEA–LIR, 09/08/26 – 09/15/26: From $816
    08

    Tu

  • SEA–LIR, 09/09/26 – 09/16/26: From $960
    09

    We

  • SEA–LIR, 09/10/26 – 09/17/26: From $656
    10

    Th

  • SEA–LIR, 09/11/26 – 09/18/26: From $955
    11

    Fr

  • SEA–LIR, 09/12/26 – 09/19/26: From $656
    12

    Sa

  • SEA–LIR, 09/13/26 – 09/20/26: From $845
    13

    Su

  • SEA–LIR, 09/14/26 – 09/21/26: From $890
    14

    Mo

  • SEA–LIR, 09/15/26 – 09/22/26: From $2,828
    15

    Tu

  • SEA–LIR, 09/16/26 – 09/23/26: From $741
    16

    We

  • SEA–LIR, 09/17/26 – 09/24/26: From $651
    17

    Th

  • SEA–LIR, 09/18/26 – 09/25/26: From $800
    18

    Fr

  • SEA–LIR, 09/19/26 – 09/26/26: From $656
    19

    Sa

    • range$651-$3,485

    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

    $
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    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $626Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $631Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $631Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $631Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $643Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    10/05/26 - 10/12/26

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 3 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    10/22/26 - 10/29/26

    Round trip

    Economy

    from
    $651Fare subject to changes
    Updated: 3 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

    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 Seattle to Liberia (Costa Rica)