Alaska Airlines Flights from Seattle to Boston

Lowest fares from Seattle to Boston

Mar 2026
From$259*
Seen: 1 hour ago
Flight Type One Way|Saver
Apr 2026
From$205*
Seen: 1 hour ago
Flight Type One Way|Saver
May 2026
From$149*
Seen: 1 hour ago
Flight Type One Way|Saver
$205
$642
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    • Range$205-$642

    *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.

    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: May 19, 2026

    From

    $149

    Seen: 1 hour ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: Jun 3, 2026

    From

    $149

    Seen: 1 hour ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: Jun 2, 2026

    From

    $149

    Seen: 1 hour ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: Dec 5, 2026

    From

    $149

    Seen: 9 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 7, 2026

    From

    $149

    Seen: 8 hours ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: May 12, 2026

    From

    $159

    Seen: 1 hour ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: May 23, 2026

    From

    $164

    Seen: 1 hour ago

    Seattle (SEA)Boston (BOS)One-way
    |
    Saver    		Depart: Jun 16, 2026

    From

    $169

    Seen: 1 hour 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.

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