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$896*
Seen: 20 hours ago
Flight Type One Way|Saver
Jun 2026
From$826*
Seen: 37 minutes 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: Jul 20, 2026

    From

    $550

    Seen: 1 hour ago

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

    From

    $550

    Seen: 3 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Aug 16, 2026

    From

    $550

    Seen: 13 minutes ago

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

    From

    $550

    Seen: 10 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Sep 1, 2026

    From

    $550

    Seen: 19 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Nov 10, 2026

    From

    $550

    Seen: 19 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Sep 6, 2026

    From

    $550

    Seen: 18 hours ago

    Seattle (SEA)London (LHR)One-way
    |
    Saver    		Depart: Sep 23, 2026

    From

    $550

    Seen: 15 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.

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