American Airlines flights from Seattle to London

Recent searches for flights from Seattle to London

Jul 2026
From$1,273*
Updated: 18 hours ago
Round tripIEconomy
Aug 2026
From$924*
Updated: 18 hours ago
Round tripIEconomy
Sep 2026
From$928*
Updated: 2 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $924
cmp-daily-histogram-bars-legend-max-price-aria-label $1.3K
Displaying fares for July-2026
  • SEA–LON, 07/31/26 – 08/07/26: From $1,273
    31

    Fr

    JUL

  • SEA–LHR, 08/01/26 – 08/08/26: From $1,344
    01

    Sa

  • SEA–LHR, 08/02/26 – 08/09/26: From $1,294
    02

    Su

  • SEA–LON, 08/03/26 – 08/10/26: From $1,294
    03

    Mo

  • SEA–LON, 08/04/26 – 08/11/26: From $1,224
    04

    Tu

  • SEA–LON, 08/05/26 – 08/12/26: From $1,124
    05

    We

  • SEA–LON, 08/06/26 – 08/13/26: From $1,164
    06

    Th

  • SEA–LON, 08/07/26 – 08/14/26: From $1,164
    07

    Fr

  • SEA–LON, 08/08/26 – 08/15/26: From $1,229
    08

    Sa

  • SEA–LON, 08/09/26 – 08/16/26: From $1,169
    09

    Su

  • SEA–LON, 08/10/26 – 08/17/26: From $1,169
    10

    Mo

  • SEA–LON, 08/11/26 – 08/18/26: From $1,109
    11

    Tu

  • SEA–LON, 08/12/26 – 08/19/26: From $1,028
    12

    We

  • SEA–LON, 08/13/26 – 08/20/26: From $1,078
    13

    Th

  • SEA–LON, 08/14/26 – 08/21/26: From $1,078
    14

    Fr

  • SEA–LON, 08/15/26 – 08/22/26: From $1,128
    15

    Sa

  • SEA–LON, 08/16/26 – 08/23/26: From $1,078
    16

    Su

  • SEA–LHR, 08/17/26 – 08/24/26: From $1,049
    17

    Mo

  • SEA–LON, 08/18/26 – 08/25/26: From $1,028
    18

    Tu

  • SEA–LON, 08/19/26 – 08/26/26: From $1,028
    19

    We

  • SEA–LON, 08/20/26 – 08/27/26: From $1,078
    20

    Th

  • SEA–LON, 08/21/26 – 08/28/26: From $1,049
    21

    Fr

  • SEA–LON, 08/22/26 – 08/29/26: From $1,128
    22

    Sa

  • SEA–LON, 08/23/26 – 08/30/26: From $1,078
    23

    Su

  • SEA–LON, 08/24/26 – 08/31/26: From $1,049
    24

    Mo

  • SEA–LON, 08/25/26 – 09/01/26: From $1,028
    25

    Tu

  • SEA–LHR, 08/26/26 – 09/02/26: From $1,028
    26

    We

  • SEA–LON, 08/27/26 – 09/03/26: From $1,078
    27

    Th

  • SEA–LHR, 08/28/26 – 09/04/26: From $989
    28

    Fr

  • SEA–LON, 08/29/26 – 09/05/26: From $1,078
    29

    Sa

  • SEA–LON, 08/30/26 – 09/04/26: From $924
    30

    Su

    • range$924-$1,344

    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 London flights

    $
    keyboard_arrow_down

    Seattle (SEA)to

    London (LON)
    11/17/26 - 11/24/26

    Round trip

    Economy

    from
    $879Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $879Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/04/26 - 11/11/26

    Round trip

    Economy

    from
    $879Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $879Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/11/26 - 11/18/26

    Round trip

    Economy

    from
    $879Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/18/26 - 11/25/26

    Round trip

    Economy

    from
    $879Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/24/26 - 12/01/26

    Round trip

    Economy

    from
    $921Fare subject to changes
    Updated: 2 hours ago

    Seattle (SEA)to

    London (LON)
    11/25/26 - 12/02/26

    Round trip

    Economy

    from
    $921Fare subject to changes
    Updated: 2 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 London

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