American Airlines flights from Boston to Seattle

Recent searches for flights from Boston to Seattle

Aug 2026
From$333*
Updated: 3 hours ago
Round tripIEconomy
Sep 2026
From$317*
Updated: 11 hours ago
Round tripIEconomy
Oct 2026
From$317*
Updated: 11 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $330
cmp-daily-histogram-bars-legend-max-price-aria-label $812
Displaying fares for August-2026
  • BOS–SEA, 08/05/26 – 08/12/26: From $812
    05

    We

    AUG

  • BOS–SEA, 08/06/26 – 08/13/26: From $812
    06

    Th

  • BOS–SEA, 08/07/26 – 08/14/26: From $747
    07

    Fr

  • BOS–SEA, 08/08/26 – 08/15/26: From $692
    08

    Sa

  • BOS–SEA, 08/09/26 – 08/13/26: From $642
    09

    Su

  • BOS–SEA, 08/10/26 – 08/13/26: From $567
    10

    Mo

  • BOS–SEA, 08/11/26 – 08/18/26: From $532
    11

    Tu

  • BOS–SEA, 08/12/26 – 08/19/26: From $532
    12

    We

  • BOS–SEA, 08/13/26 – 08/20/26: From $672
    13

    Th

  • BOS–SEA, 08/14/26 – 08/22/26: From $592
    14

    Fr

  • BOS–SEA, 08/15/26 – 08/22/26: From $602
    15

    Sa

  • BOS–SEA, 08/16/26 – 08/23/26: From $602
    16

    Su

  • BOS–SEA, 08/17/26 – 08/24/26: From $532
    17

    Mo

  • BOS–SEA, 08/18/26 – 08/25/26: From $410
    18

    Tu

  • BOS–SEA, 08/19/26 – 08/26/26: From $480
    19

    We

  • BOS–SEA, 08/20/26 – 08/24/26: From $487
    20

    Th

  • BOS–SEA, 08/21/26 – 08/25/26: From $400
    21

    Fr

  • BOS–SEA, 08/22/26 – 08/29/26: From $410
    22

    Sa

  • BOS–SEA, 08/23/26 – 08/26/26: From $410
    23

    Su

  • BOS–SEA, 08/24/26 – 08/31/26: From $441
    24

    Mo

  • BOS–SEA, 08/25/26 – 09/01/26: From $333
    25

    Tu

  • BOS–SEA, 08/26/26 – 09/02/26: From $333
    26

    We

  • BOS–SEA, 08/27/26 – 09/03/26: From $511
    27

    Th

  • BOS–SEA, 08/28/26 – 08/31/26: From $385
    28

    Fr

  • BOS–SEA, 08/29/26 – 09/05/26: From $333
    29

    Sa

  • BOS–SEA, 08/30/26 – 09/06/26: From $395
    30

    Su

  • BOS–SEA, 08/31/26 – 09/07/26: From $511
    31

    Mo

  • BOS–SEA, 09/01/26 – 09/15/26: From $330
    01

    Tu

    SEP

  • BOS–SEA, 09/02/26 – 09/07/26: From $470
    02

    We

  • BOS–SEA, 09/03/26 – 09/10/26: From $417
    03

    Th

  • BOS–SEA, 09/04/26 – 09/11/26: From $417
    04

    Fr

    • range$330-$812

    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 Boston to Seattle flights

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    keyboard_arrow_down

    Boston (BOS)to

    Seattle (SEA)
    09/10/26 - 09/14/26

    Round trip

    Economy

    from
    $317Fare subject to changes
    Updated: 12 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/21/26 - 10/30/26

    Round trip

    Economy

    from
    $317Fare subject to changes
    Updated: 11 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/21/26 - 10/27/26

    Round trip

    Economy

    from
    $317Fare subject to changes
    Updated: 7 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/09/26 - 09/16/26

    Round trip

    Economy

    from
    $317Fare subject to changes
    Updated: 11 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/13/26 - 09/16/26

    Round trip

    Economy

    from
    $317Fare subject to changes
    Updated: 8 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/08/26 - 09/16/26

    Round trip

    Economy

    from
    $320Fare subject to changes
    Updated: 11 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/08/26 - 09/11/26

    Round trip

    Economy

    from
    $320Fare subject to changes
    Updated: 8 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/05/26 - 10/04/26

    Round trip

    Economy

    from
    $320Fare subject to changes
    Updated: 8 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 Boston to Seattle

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