American Airlines flights from Seattle to Liberia (Costa Rica)

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

Jul 2026
From$1,850*
Updated: 12 hours ago
Round tripIEconomy
Aug 2026
From$635*
Updated: 12 hours ago
Round tripIEconomy
Sep 2026
From$555*
Updated: 12 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $674
cmp-daily-histogram-bars-legend-max-price-aria-label $3.5K
Displaying fares for July-2026
  • SEA–LIR, 07/30/26 – 08/06/26: From $1,920
    30

    Th

    JUL

  • SEA–LIR, 07/31/26 – 08/07/26: From $1,850
    31

    Fr

  • SEA–LIR, 08/01/26 – 08/08/26: From $3,485
    01

    Sa

    AUG

  • SEA–LIR, 08/02/26 – 08/09/26: From $2,468
    02

    Su

  • SEA–LIR, 08/03/26 – 08/10/26: From $1,945
    03

    Mo

  • SEA–LIR, 08/04/26 – 08/11/26: From $1,889
    04

    Tu

  • SEA–LIR, 08/05/26 – 08/12/26: From $1,855
    05

    We

  • SEA–LIR, 08/06/26 – 08/13/26: From $1,850
    06

    Th

  • SEA–LIR, 08/07/26 – 08/14/26: From $1,877
    07

    Fr

  • SEA–LIR, 08/08/26 – 08/15/26: From $1,916
    08

    Sa

  • SEA–LIR, 08/09/26 – 08/16/26: From $1,956
    09

    Su

  • SEA–LIR, 08/10/26 – 08/17/26: From $1,233
    10

    Mo

  • SEA–LIR, 08/11/26 – 08/18/26: From $1,274
    11

    Tu

  • SEA–LIR, 08/12/26 – 08/19/26: From $1,065
    12

    We

  • SEA–LIR, 08/13/26 – 08/20/26: From $1,251
    13

    Th

  • SEA–LIR, 08/14/26 – 08/21/26: From $1,374
    14

    Fr

  • SEA–LIR, 08/15/26 – 08/22/26: From $1,951
    15

    Sa

  • SEA–LIR, 08/16/26 – 08/23/26: From $1,956
    16

    Su

  • SEA–LIR, 08/17/26 – 08/24/26: From $1,021
    17

    Mo

  • SEA–LIR, 08/18/26 – 08/25/26: From $1,030
    18

    Tu

  • SEA–LIR, 08/19/26 – 08/26/26: From $855
    19

    We

  • SEA–LIR, 08/20/26 – 08/27/26: From $1,129
    20

    Th

  • SEA–LIR, 08/21/26 – 08/28/26: From $820
    21

    Fr

  • SEA–LIR, 08/22/26 – 08/29/26: From $825
    22

    Sa

  • SEA–LIR, 08/23/26 – 08/30/26: From $885
    23

    Su

  • SEA–LIR, 08/24/26 – 08/31/26: From $813
    24

    Mo

  • SEA–LIR, 08/25/26 – 09/01/26: From $859
    25

    Tu

  • SEA–LIR, 08/26/26 – 09/02/26: From $904
    26

    We

  • SEA–LIR, 08/27/26 – 09/03/26: From $904
    27

    Th

  • SEA–LIR, 08/28/26 – 09/04/26: From $841
    28

    Fr

  • SEA–LIR, 08/29/26 – 09/05/26: From $674
    29

    Sa

    • range$674-$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

    $
    keyboard_arrow_down

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $535Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $535Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

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

    Round trip

    Economy

    from
    $535Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    09/26/26 - 10/03/26

    Round trip

    Economy

    from
    $555Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    09/11/26 - 09/18/26

    Round trip

    Economy

    from
    $560Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    09/17/26 - 09/24/26

    Round trip

    Economy

    from
    $560Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    09/19/26 - 09/26/26

    Round trip

    Economy

    from
    $560Fare subject to changes
    Updated: 12 hours ago

    Seattle (SEA)to

    Liberia (Costa Rica) (LIR)
    09/21/26 - 09/28/26

    Round trip

    Economy

    from
    $560Fare subject to changes
    Updated: 12 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)