London to Seattle Flights on Aer Lingus from £327.98*

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Book London to Seattle flight deals*

May 2026
From£447.39*
Seen: 19 hrs ago
Each way/Economy
Jun 2026
From£331.84*
Seen: 5 hrs ago
Each way/Economy
Jul 2026
No result for this month.
cmp-daily-histogram-bars-legend-min-price-aria-label £447.39
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    • Range£447.39

    * 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*

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

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    £

    London (LHR)to

    Dublin (DUB)
    6 Jun 2026 - 14 Jun 2026
    From
    £62.70
    Seen: 1 hour ago
    Each way
    Economy

    Birmingham (BHX)to

    Dublin (DUB)
    11 Jun 2026 - 13 Jun 2026
    From
    £29.29
    Seen: 11 hrs ago
    Each way
    Economy

    Manchester (MAN)to

    Orlando (MCO)
    10 Jun 2026 - 17 Jun 2026
    From
    £284.52
    Seen: 11 hrs ago
    Each way
    Economy

    Birmingham (BHX)to

    Belfast (BHD)
    Depart: 9 Jun 2026
    From
    £39.99
    Seen: 11 hrs ago
    One way
    Economy

    Manchester (MAN)to

    New York (JFK)
    9 Nov 2026 - 12 Nov 2026
    From
    £262.25
    Seen: 2 hrs ago
    Each way
    Economy

    Belfast (BHD)to

    Birmingham (BHX)
    Depart: 30 Jun 2026
    From
    £39.99
    Seen: 10 hrs ago
    One way
    Economy

    London (LHR)to

    Cork (ORK)
    29 Jul 2026 - 18 Aug 2026
    From
    £65.69
    Seen: 15 hrs ago
    Each way
    Economy

    Southampton (SOU)to

    Belfast (BHD)
    26 May 2026 - 28 May 2026
    From
    £44.99
    Seen: 11 hrs ago
    Each way
    Economy

    Manchester (MAN)to

    Dublin (DUB)
    20 May 2026 - 21 May 2026
    From
    £50.26
    Seen: 12 hrs ago
    Each way
    Economy

    Edinburgh (EDI)to

    Dublin (DUB)
    19 May 2026 - 26 May 2026
    From
    £39.97
    Seen: 18 hrs ago
    Each way
    Economy

    Manchester (MAN)to

    Belfast (BHD)
    19 May 2026 - 19 May 2026
    From
    £39.99
    Seen: 12 hrs ago
    Each way
    Economy

    Glasgow (GLA)to

    Dublin (DUB)
    26 May 2026 - 28 May 2026
    From
    £34.95
    Seen: 12 hrs ago
    Each way
    Economy

    Leeds (LBA)to

    Belfast (BHD)
    Depart: 6 Jun 2026
    From
    £39.99
    Seen: 12 hrs ago
    One way
    Economy

    Southampton (SOU)to

    Dublin (DUB)
    25 May 2026 - 27 May 2026
    From
    £39.77
    Seen: 11 hrs ago
    Each way
    Economy

    Belfast (BHD)to

    Manchester (MAN)
    Depart: 20 May 2026
    From
    £39.99
    Seen: 4 hrs ago
    One way
    Economy

    Bristol (BRS)to

    Dublin (DUB)
    20 May 2026 - 3 Jun 2026
    From
    £30.82
    Seen: 12 hrs ago
    Each way
    Economy

    Edinburgh (EDI)to

    Belfast (BHD)
    Depart: 11 Jun 2026
    From
    £39.99
    Seen: 11 hrs ago
    One way
    Economy

    Belfast (BHD)to

    Edinburgh (EDI)
    Depart: 16 Jun 2026
    From
    £39.99
    Seen: 11 hrs ago
    One way
    Economy

    London (LHR)to

    Shannon (SNN)
    26 May 2026 - 26 May 2026
    From
    £49.45
    Seen: 17 hrs ago
    Each way
    Economy

    Belfast (BHD)to

    Leeds (LBA)
    Depart: 25 May 2026
    From
    £39.99
    Seen: 10 hrs ago
    One way
    Economy