American Airlines flights from Seattle to Lisbon

Recent searches for flights from Seattle to Lisbon

Aug 2026
From$1,077*
Updated: 7 hours ago
Round tripIEconomy
Sep 2026
From$954*
Updated: 7 hours ago
Round tripIEconomy
Oct 2026
From$766*
Updated: 7 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $1.1K
cmp-daily-histogram-bars-legend-max-price-aria-label $1.8K
Displaying fares for August-2026
  • SEA–LIS, 08/14/26 – 08/21/26: From $1,238
    14

    Fr

    AUG

  • SEA–LIS, 08/15/26 – 08/22/26: From $1,247
    15

    Sa

  • SEA–LIS, 08/16/26 – 08/23/26: From $1,350
    16

    Su

  • SEA–LIS, 08/17/26 – 08/24/26: From $1,175
    17

    Mo

  • SEA–LIS, 08/18/26 – 08/25/26: From $1,082
    18

    Tu

  • SEA–LIS, 08/19/26 – 08/26/26: From $1,077
    19

    We

  • SEA–LIS, 08/20/26 – 08/27/26: From $1,142
    20

    Th

  • SEA–LIS, 08/21/26 – 08/28/26: From $1,142
    21

    Fr

  • SEA–LIS, 08/22/26 – 08/29/26: From $1,463
    22

    Sa

  • SEA–LIS, 08/23/26 – 08/30/26: From $1,393
    23

    Su

  • SEA–LIS, 08/24/26 – 08/31/26: From $1,297
    24

    Mo

  • SEA–LIS, 08/25/26 – 09/01/26: From $1,237
    25

    Tu

  • SEA–LIS, 08/26/26 – 09/02/26: From $1,237
    26

    We

  • SEA–LIS, 08/27/26 – 09/03/26: From $1,307
    27

    Th

  • SEA–LIS, 08/28/26 – 09/04/26: From $1,366
    28

    Fr

  • SEA–LIS, 08/29/26 – 09/05/26: From $1,591
    29

    Sa

  • SEA–LIS, 08/30/26 – 09/06/26: From $1,561
    30

    Su

  • SEA–LIS, 08/31/26 – 09/07/26: From $1,813
    31

    Mo

  • SEA–LIS, 09/01/26 – 09/08/26: From $1,461
    01

    Tu

    SEP

  • SEA–LIS, 09/02/26 – 09/09/26: From $1,625
    02

    We

  • SEA–LIS, 09/03/26 – 09/10/26: From $1,536
    03

    Th

  • SEA–LIS, 09/04/26 – 09/11/26: From $1,536
    04

    Fr

  • SEA–LIS, 09/05/26 – 09/12/26: From $1,591
    05

    Sa

  • SEA–LIS, 09/06/26 – 09/13/26: From $1,573
    06

    Su

  • SEA–LIS, 09/07/26 – 09/14/26: From $1,526
    07

    Mo

  • SEA–LIS, 09/08/26 – 09/15/26: From $1,461
    08

    Tu

  • SEA–LIS, 09/09/26 – 09/16/26: From $1,709
    09

    We

  • SEA–LIS, 09/10/26 – 09/17/26: From $1,294
    10

    Th

  • SEA–LIS, 09/11/26 – 09/18/26: From $1,349
    11

    Fr

  • SEA–LIS, 09/12/26 – 09/19/26: From $1,300
    12

    Sa

  • SEA–LIS, 09/13/26 – 09/20/26: From $1,300
    13

    Su

    • range$1,077-$1,813

    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 Lisbon flights

    $
    keyboard_arrow_down

    Seattle (SEA)to

    Lisbon (LIS)
    12/01/26 - 12/08/26

    Round trip

    Economy

    from
    $759Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    12/08/26 - 12/15/26

    Round trip

    Economy

    from
    $759Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    12/02/26 - 12/09/26

    Round trip

    Economy

    from
    $759Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $766Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $766Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    11/11/26 - 11/18/26

    Round trip

    Economy

    from
    $766Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    11/17/26 - 11/24/26

    Round trip

    Economy

    from
    $766Fare subject to changes
    Updated: 7 hours ago

    Seattle (SEA)to

    Lisbon (LIS)
    11/18/26 - 11/25/26

    Round trip

    Economy

    from
    $766Fare subject to changes
    Updated: 7 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 Lisbon

    Looking for lower fares on your trip from Seattle to Lisbon? 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 Lisbon