Cheap flights from Seattle to Great Britain

View AU$363 flight on Mon, 8 Sep. 2025Opens in a new window

Popular airlines from Seattle to Great Britain

  • American Airlines

    American Airlines

  • Air Canada

    Air Canada

  • Air France

    Air France

  • British Airways

    British Airways

  • Delta

    Delta

  • Aer Lingus

    Aer Lingus

  • Icelandair

    Icelandair

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Cheap Flights from Seattle (SEA) to Great Britain (LON)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Wed, 6 Aug. - Wed, 13 Aug.
SEA
Seattle
LHR
London
AU$729 Return, found 1 hour ago
AU$729
Return
found 1 hour ago
Select Aer Lingus flight, departing Wed, 6 Aug. from Seattle to London, returning Wed, 13 Aug., priced at AU$729 found 1 hour ago
Virgin Atlantic
Sun, 10 Aug. - Wed, 27 Aug.
SEA
Seattle
LHR
London
AU$779 Return, found 5 days ago
AU$779
Return
found 5 days ago
Select Virgin Atlantic flight, departing Sun, 10 Aug. from Seattle to London, returning Wed, 27 Aug., priced at AU$779 found 5 days ago
Delta
Wed, 6 Aug. - Wed, 13 Aug.
SEA
Seattle
LHR
London
AU$782 Return, found 1 hour ago
AU$782
Return
found 1 hour ago
Select Delta flight, departing Wed, 6 Aug. from Seattle to London, returning Wed, 13 Aug., priced at AU$782 found 1 hour ago
United
Tue, 19 Aug. - Thu, 4 Sep.
SEA
Seattle
LHR
London
AU$789 Return, found 6 days ago
AU$789
Return
found 6 days ago
Select United flight, departing Tue, 19 Aug. from Seattle to London, returning Thu, 4 Sep., priced at AU$789 found 6 days ago
Virgin Atlantic
Tue, 19 Aug. - Thu, 4 Sep.
SEA
Seattle
LHR
London
AU$789 Return, found 6 days ago
AU$789
Return
found 6 days ago
Select Virgin Atlantic flight, departing Tue, 19 Aug. from Seattle to London, returning Thu, 4 Sep., priced at AU$789 found 6 days ago
Air Canada
Sun, 10 Aug. - Wed, 27 Aug.
SEA
Seattle
LHR
London
AU$790 Return, found 5 days ago
AU$790
Return
found 5 days ago
Select Air Canada flight, departing Sun, 10 Aug. from Seattle to London, returning Wed, 27 Aug., priced at AU$790 found 5 days ago

Find the cheapest month to fly from Seattle (SEA) to London (LHR)

October is typically the cheapest month to fly

From AU$737 - AU$1,330 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.