Flights from Shannon to Seattle from $ 921*

Promotion Code

Changed bag rules and optional services         Cruise Packages

Featured daily fares for flights from Shannon (SNN) to Seattle (SEA)

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Mar 2026
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    • *Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.

    More United deals on Shannon (SNN) to Seattle (SEA) flights

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    More United deals on Shannon (SNN) to Seattle (SEA) flights
    From
    To
    Fare Type
    Dates
    Price
    Shannon (SNN)Seattle (SEA)Roundtrip
    |
    Economy    		09/09/26 - 09/18/26

    from

    $ 921

    Viewed: 2 hours ago

    Shannon (SNN)Seattle (SEA)Roundtrip
    |
    Economy    		09/09/26 - 09/18/26

    from

    $ 1,151

    Viewed: 2 hours ago

    Shannon (SNN)Seattle (SEA)Roundtrip
    |
    Economy    		09/09/26 - 09/18/26

    from

    $ 1,666

    Viewed: 2 hours ago

    *Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.

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