Cheap flights from Seattle to Great Britain

View AU$365 flight on Tue, 9 Sep. 2025Opens in a new window

Popular airlines from Seattle to Great Britain

  • British Airways

    British Airways

  • Delta

    Delta

  • KLM

    KLM

  • Lufthansa

    Lufthansa

  • United

    United

  • Virgin Atlantic

    Virgin Atlantic

  • Air Canada

    Air Canada

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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$730 Return, found 12 hours ago
AU$730
Return
found 12 hours ago
Select Aer Lingus flight, departing Wed, 6 Aug. from Seattle to London, returning Wed, 13 Aug., priced at AU$730 found 12 hours ago
Delta
Wed, 6 Aug. - Wed, 13 Aug.
SEA
Seattle
LHR
London
AU$777 Return, found 12 hours ago
AU$777
Return
found 12 hours ago
Select Delta flight, departing Wed, 6 Aug. from Seattle to London, returning Wed, 13 Aug., priced at AU$777 found 12 hours ago
Virgin Atlantic
Sun, 3 Aug. - Tue, 19 Aug.
SEA
Seattle
LHR
London
AU$786 Return, found 10 hours ago
AU$786
Return
found 10 hours ago
Select Virgin Atlantic flight, departing Sun, 3 Aug. from Seattle to London, returning Tue, 19 Aug., priced at AU$786 found 10 hours ago
United
Sun, 3 Aug. - Tue, 19 Aug.
SEA
Seattle
LHR
London
AU$795 Return, found 10 hours ago
AU$795
Return
found 10 hours ago
Select United flight, departing Sun, 3 Aug. from Seattle to London, returning Tue, 19 Aug., priced at AU$795 found 10 hours ago
Icelandair
Mon, 24 Nov. - Sun, 25 Jan.
SEA
Seattle
LHR
London
AU$801 Return, found 2 days ago
AU$801
Return
found 2 days ago
Select Icelandair flight, departing Mon, 24 Nov. from Seattle to London, returning Sun, 25 Jan., priced at AU$801 found 2 days ago
Swiss International Air Lines
Mon, 8 Sep. - Mon, 15 Sep.
SEA
Seattle
LGW
London
AU$813 Return, found 8 hours ago
AU$813
Return
found 8 hours ago
Select Swiss International Air Lines flight, departing Mon, 8 Sep. from Seattle to London, returning Mon, 15 Sep., priced at AU$813 found 8 hours 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.