London to Seattle Flights on Aer Lingus from £307.80*

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Book London to Seattle flight deals*

May 2026
From£460.55*
Seen: 10 hrs ago
Each way/Economy
Jun 2026
No result for this month.
Jul 2026
From£310.96*
Seen: 16 hrs ago
Each way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label £460.55
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    • Range£460.55

    * Fares displayed include air transportation charges, taxes and fees. Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Fares are economy class and may include connections with our partner airlines. Modifying this information may result in a different fare. Additional baggage fees and charges for optional products and services may apply.

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    Book London to Seattle flight deals*

    *Roundtrip Restrictions apply.
    Each way fare as part of a return trip including taxes and charges. One way fare including taxes and charges.

    Testing Each way

    Testing Each way
    From
    To
    Fare Type
    Dates
    Price
    London (LHR)Seattle (SEA)Each way
    /
    Economy    		8 Sep 2026 - 14 Sep 2026

    From

    £307.80

    Seen: 15 hrs ago

    Explore other routes

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    Dublin (DUB)to

    New York (JFK)
    22 Nov 2026 - 28 Nov 2026
    From
    €223.25
    Seen: 34 minutes ago
    Each way
    Economy

    Dublin (DUB)to

    Orlando (MCO)
    11 Jun 2026 - 15 Jun 2026
    From
    €252.25
    Seen: 23 hrs ago
    Each way
    Economy

    Dublin (DUB)to

    Malaga (AGP)
    Depart: 9 Aug 2026
    From
    €76.25
    Seen: 45 minutes ago
    One way
    Economy

    Dublin (DUB)to

    London (LHR)
    Depart: 13 Jun 2026
    From
    €59.25
    Seen: 1 hour ago
    One way
    Economy

    Dublin (DUB)to

    Paris (CDG)
    Depart: 7 Sep 2026
    From
    €63.66
    Seen: 4 hrs ago
    One way
    Economy

    Dublin (DUB)to

    Faro (FAO)
    Depart: 22 Aug 2026
    From
    €76.25
    Seen: 11 hrs ago
    One way
    Economy

    Boston (BOS)to

    Dublin (DUB)
    10 Sep 2026 - 19 Sep 2026
    From
    $615.67
    Seen: 13 hrs ago
    Roundtrip*
    Economy

    Dublin (DUB)to

    Boston (BOS)
    3 Jun 2026 - 30 Jun 2026
    From
    €225.25
    Seen: 19 hrs ago
    Each way
    Economy

    London (LHR)to

    Dublin (DUB)
    28 May 2026 - 3 Jun 2026
    From
    £64.19
    Seen: 16 hrs ago
    Each way
    Economy

    Dublin (DUB)to

    Lanzarote (ACE)
    Depart: 17 Aug 2026
    From
    €129.25
    Seen: 11 hrs ago
    One way
    Economy

    Chicago (ORD)to

    Dublin (DUB)
    28 Oct 2026 - 4 Nov 2026
    From
    $691.99
    Seen: 22 hrs ago
    Roundtrip*
    Economy

    Dublin (DUB)to

    Chicago (ORD)
    15 Nov 2026 - 29 Nov 2026
    From
    €230.25
    Seen: 13 hrs ago
    Each way
    Economy

    New York (JFK)to

    Dublin (DUB)
    4 Nov 2026 - 18 Nov 2026
    From
    $610.99
    Seen: 11 hrs ago
    Roundtrip*
    Economy

    Dublin (DUB)to

    Las Vegas (LAS)
    31 Oct 2026 - 10 Nov 2026
    From
    €260.25
    Seen: 16 hrs ago
    Each way
    Economy

    Dublin (DUB)to

    Lisbon (LIS)
    Depart: 9 Aug 2026
    From
    €64.68
    Seen: 1 hour ago
    One way
    Economy

    Dublin (DUB)to

    Nashville (BNA)
    21 Nov 2026 - 28 Nov 2026
    From
    €240.25
    Seen: 11 hrs ago
    Each way
    Economy

    Dublin (DUB)to

    Palma de Mallorca (PMI)
    Depart: 31 Aug 2026
    From
    €76.25
    Seen: 18 hrs ago
    One way
    Economy

    Dublin (DUB)to

    Toronto (YYZ)
    6 Nov 2026 - 11 Nov 2026
    From
    €220.94
    Seen: 11 hrs ago
    Each way
    Economy

    Cork (ORK)to

    London (LHR)
    Depart: 11 Jun 2026
    From
    €57.37
    Seen: 17 hrs ago
    One way
    Economy

    Dublin (DUB)to

    Rome (FCO)
    Depart: 11 Nov 2026
    From
    €77.25
    Seen: 9 hrs ago
    One way
    Economy