Alaska Airlines Flights from Seattle to London

Lowest fares from Seattle to London

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Apr 2026
Try another month to see offers
May 2026
From$826*
Seen: 4 hours ago
Flight Type One Way|Saver
Jun 2026
From$826*
Seen: 1 day ago
Flight Type One Way|Saver
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    • *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 London.*

    $
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    One-way low-fare flights Seattle to London.*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Oct 6, 2026

    From

    $550

    Seen: 10 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Aug 12, 2026

    From

    $550

    Seen: 1 day ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Jul 20, 2026

    From

    $550

    Seen: 1 day ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Jul 28, 2026

    From

    $550

    Seen: 1 day ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Nov 11, 2026

    From

    $550

    Seen: 22 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Aug 26, 2026

    From

    $550

    Seen: 1 day ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Jul 27, 2026

    From

    $550

    Seen: 20 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Aug 11, 2026

    From

    $550

    Seen: 1 day 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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