Cheap flights from London to North Seattle

View AU$835 flight on Mon, 15 Sep. 2025Opens in a new window

Popular airlines from London to North Seattle

  • American Airlines

    American Airlines

  • Air France

    Air France

  • Finnair

    Finnair

  • British Airways

    British Airways

  • Delta

    Delta

  • Aer Lingus

    Aer Lingus

  • Iberia

    Iberia

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Cheap Flights from London (LON) to North Seattle (SEA)

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.

Icelandair
Wed, 10 Sep. - Sat, 27 Sep.
LHR
London
SEA
Seattle
AU$902 Return, found 1 day ago
AU$902
Return
found 1 day ago
Select Icelandair flight, departing Wed, 10 Sep. from London to Seattle, returning Sat, 27 Sep., priced at AU$902 found 1 day ago
Icelandair
Mon, 25 Aug. - Tue, 9 Sep.
LGW
London
SEA
Seattle
AU$910 Return, found 6 days ago
AU$910
Return
found 6 days ago
Select Icelandair flight, departing Mon, 25 Aug. from London to Seattle, returning Tue, 9 Sep., priced at AU$910 found 6 days ago
United
Fri, 12 Sep. - Fri, 26 Sep.
LHR
London
SEA
Seattle
AU$998 Return, found 1 day ago
AU$998
Return
found 1 day ago
Select United flight, departing Fri, 12 Sep. from London to Seattle, returning Fri, 26 Sep., priced at AU$998 found 1 day ago
American Airlines
Wed, 27 May - Mon, 1 Jun.
LHR
London
SEA
Seattle
AU$1,021 Return, found 1 day ago
AU$1,021
Return
found 1 day ago
Select American Airlines flight, departing Wed, 27 May from London to Seattle, returning Mon, 1 Jun., priced at AU$1,021 found 1 day ago
Lufthansa
Fri, 12 Sep. - Fri, 26 Sep.
LHR
London
SEA
Seattle
AU$1,028 Return, found 1 day ago
AU$1,028
Return
found 1 day ago
Select Lufthansa flight, departing Fri, 12 Sep. from London to Seattle, returning Fri, 26 Sep., priced at AU$1,028 found 1 day ago
Aer Lingus
Wed, 10 Sep. - Wed, 17 Sep.
LHR
London
SEA
Seattle
AU$1,046 Return, found 1 day ago
AU$1,046
Return
found 1 day ago
Select Aer Lingus flight, departing Wed, 10 Sep. from London to Seattle, returning Wed, 17 Sep., priced at AU$1,046 found 1 day ago

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

February is typically the cheapest month to fly

From AU$657 - AU$1,415 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.