American Airlines flights from Boston to Seattle

Recent searches for flights from Boston to Seattle

Aug 2026
From$541*
Updated: 6 hours ago
Round tripIEconomy
Sep 2026
From$333*
Updated: 6 hours ago
Round tripIEconomy
Oct 2026
From$333*
Updated: 6 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $333
cmp-daily-histogram-bars-legend-max-price-aria-label $705
Displaying fares for August-2026
  • BOS–SEA, 08/25/26 – 08/31/26: From $569
    25

    Tu

    AUG

  • BOS–SEA, 08/26/26 – 09/02/26: From $541
    26

    We

  • BOS–SEA, 08/27/26 – 09/03/26: From $615
    27

    Th

  • BOS–SEA, 08/28/26 – 09/04/26: From $615
    28

    Fr

  • BOS–SEA, 08/29/26 – 09/05/26: From $541
    29

    Sa

  • BOS–SEA, 08/30/26 – 09/06/26: From $615
    30

    Su

  • BOS–SEA, 08/31/26 – 09/07/26: From $705
    31

    Mo

  • BOS–SEA, 09/01/26 – 09/08/26: From $524
    01

    Tu

    SEP

  • BOS–SEA, 09/02/26 – 09/09/26: From $514
    02

    We

  • BOS–SEA, 09/03/26 – 09/10/26: From $542
    03

    Th

  • BOS–SEA, 09/04/26 – 09/11/26: From $542
    04

    Fr

  • BOS–SEA, 09/05/26 – 09/12/26: From $514
    05

    Sa

  • BOS–SEA, 09/06/26 – 09/13/26: From $542
    06

    Su

  • BOS–SEA, 09/07/26 – 09/14/26: From $542
    07

    Mo

  • BOS–SEA, 09/08/26 – 09/15/26: From $375
    08

    Tu

  • BOS–SEA, 09/09/26 – 09/16/26: From $410
    09

    We

  • BOS–SEA, 09/10/26 – 09/17/26: From $422
    10

    Th

  • BOS–SEA, 09/11/26 – 09/18/26: From $422
    11

    Fr

  • BOS–SEA, 09/12/26 – 09/19/26: From $410
    12

    Sa

  • BOS–SEA, 09/13/26 – 09/20/26: From $422
    13

    Su

  • BOS–SEA, 09/14/26 – 09/21/26: From $422
    14

    Mo

  • BOS–SEA, 09/15/26 – 09/22/26: From $333
    15

    Tu

  • BOS–SEA, 09/16/26 – 09/23/26: From $333
    16

    We

  • BOS–SEA, 09/17/26 – 09/24/26: From $427
    17

    Th

  • BOS–SEA, 09/18/26 – 09/25/26: From $357
    18

    Fr

  • BOS–SEA, 09/19/26 – 09/26/26: From $333
    19

    Sa

  • BOS–SEA, 09/20/26 – 09/27/26: From $427
    20

    Su

  • BOS–SEA, 09/21/26 – 09/28/26: From $357
    21

    Mo

  • BOS–SEA: cmp-view-offers-disclaimer. Find Offers
    22

    Tu

  • BOS–SEA: cmp-view-offers-disclaimer. Find Offers
    23

    We

  • BOS–SEA: cmp-view-offers-disclaimer. Find Offers
    24

    Th

    • range$333-$705

    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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    Boston (BOS)to

    Seattle (SEA)
    09/16/26 - 09/23/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/29/26 - 10/06/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/03/26 - 10/10/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/06/26 - 10/13/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/10/26 - 10/17/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    09/26/26 - 10/03/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 hours ago

    Boston (BOS)to

    Seattle (SEA)
    10/07/26 - 10/14/26

    Round trip

    Economy

    from
    $333Fare subject to changes
    Updated: 6 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