Alaska Airlines Flights from Seattle to Boston

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Lowest fares from Seattle to Boston

$53
$374
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  • Range$53-$374

    One-way low-fare flights Seattle to Boston.*

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    One-way low-fare flights Seattle to Boston.*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Jul 22, 2025

    From

    $53

    Seen: 4 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Sep 9, 2025

    From

    $109

    Seen: 16 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Sep 16, 2025

    From

    $109

    Seen: 16 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Nov 12, 2025

    From

    $109

    Seen: 16 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Nov 1, 2025

    From

    $109

    Seen: 16 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Sep 10, 2025

    From

    $109

    Seen: 16 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Sep 13, 2025

    From

    $109

    Seen: 16 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver
    Depart: Oct 14, 2025

    From

    $109

    Seen: 16 hours ago

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.