London to Seattle Flights on Aer Lingus from £348.57*

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Book London to Seattle flight deals*

Jun 2026
From£348.57*
Seen: 7 hrs ago
Each way/Economy
Jul 2026
From£360.06*
Seen: 12 hrs ago
Each way/Economy
Aug 2026
No result for this month.
£348.57
Displaying fares for March-2026
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    • Range£348.57

    * 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.

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    £

    London (LHR)to

    Dublin (DUB)
    21 Apr 2026 - 25 Apr 2026
    From
    £62.99
    Seen: 20 minutes ago
    Each way
    Economy

    Birmingham (BHX)to

    Dublin (DUB)
    25 Mar 2026 - 26 Mar 2026
    From
    £26.48
    Seen: 2 hrs ago
    Each way
    Economy

    Manchester (MAN)to

    Orlando (MCO)
    5 May 2026 - 12 May 2026
    From
    £476.66
    Seen: 23 hrs ago
    Roundtrip*
    Economy

    Manchester (MAN)to

    New York (JFK)
    22 Apr 2026 - 29 Apr 2026
    From
    £428.71
    Seen: 3 hrs ago
    Roundtrip*
    Economy

    Birmingham (BHX)to

    Belfast (BHD)
    Depart: 23 Mar 2026
    From
    £39.99
    Seen: 16 minutes ago
    One way
    Economy

    Manchester (MAN)to

    Dublin (DUB)
    30 Mar 2026 - 31 Mar 2026
    From
    £27.12
    Seen: 3 hrs ago
    Each way
    Economy

    London (LHR)to

    Cork (ORK)
    21 Apr 2026 - 22 Apr 2026
    From
    £51.17
    Seen: 49 minutes ago
    Each way
    Economy

    London (LHR)to

    Shannon (SNN)
    19 May 2026 - 19 May 2026
    From
    £51.37
    Seen: 1 hour ago
    Each way
    Economy

    Belfast (BHD)to

    Birmingham (BHX)
    Depart: 13 Apr 2026
    From
    £39.99
    Seen: 2 minutes ago
    One way
    Economy

    Edinburgh (EDI)to

    Dublin (DUB)
    19 Apr 2026 - 21 Apr 2026
    From
    £44.36
    Seen: 2 hrs ago
    Each way
    Economy

    Manchester (MAN)to

    Belfast (BHD)
    11 May 2026 - 13 May 2026
    From
    £39.99
    Seen: 8 minutes ago
    Each way
    Economy

    Southampton (SOU)to

    Dublin (DUB)
    28 Apr 2026 - 29 Apr 2026
    From
    £55.77
    Seen: 23 hrs ago
    Each way
    Economy

    Glasgow (GLA)to

    Dublin (DUB)
    30 Mar 2026 - 2 Apr 2026
    From
    £43.71
    Seen: 22 hrs ago
    Each way
    Economy

    Belfast (BHD)to

    Manchester (MAN)
    Depart: 23 Apr 2026
    From
    £39.99
    Seen: 24 minutes ago
    One way
    Economy

    Leeds (LBA)to

    Belfast (BHD)
    Depart: 1 Apr 2026
    From
    £37.99
    Seen: 2 hrs ago
    One way
    Economy

    Belfast (BHD)to

    Edinburgh (EDI)
    Depart: 30 Apr 2026
    From
    £39.99
    Seen: 26 minutes ago
    One way
    Economy

    Edinburgh (EDI)to

    Belfast (BHD)
    Depart: 23 Mar 2026
    From
    £39.99
    Seen: 3 minutes ago
    One way
    Economy

    Belfast (BHD)to

    Southampton (SOU)
    15 Apr 2026 - 20 May 2026
    From
    £45.99
    Seen: 25 minutes ago
    Each way
    Economy

    Bristol (BRS)to

    Dublin (DUB)
    29 Mar 2026 - 4 Apr 2026
    From
    £43.70
    Seen: 23 hrs ago
    Each way
    Economy

    Belfast (BHD)to

    Leeds (LBA)
    Depart: 9 Apr 2026
    From
    £36.99
    Seen: 2 hrs ago
    One way
    Economy