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

  • Icelandair

    Icelandair

  • American Airlines

    American Airlines

  • Air Canada

    Air Canada

  • Air France

    Air France

  • British Airways

    British Airways

  • Delta

    Delta

  • Aer Lingus

    Aer Lingus

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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
Tue, 2 Sep. - Tue, 9 Sep.
LGW
London
SEA
Seattle
AU$907 Return, found 5 days ago
AU$907
Return
found 5 days ago
Select Icelandair flight, departing Tue, 2 Sep. from London to Seattle, returning Tue, 9 Sep., priced at AU$907 found 5 days ago
Icelandair
Fri, 5 Sep. - Fri, 12 Sep.
LHR
London
SEA
Seattle
AU$909 Return, found 2 days ago
AU$909
Return
found 2 days ago
Select Icelandair flight, departing Fri, 5 Sep. from London to Seattle, returning Fri, 12 Sep., priced at AU$909 found 2 days ago
United
Fri, 5 Sep. - Fri, 12 Sep.
LHR
London
SEA
Seattle
AU$1,007 Return, found 2 days ago
AU$1,007
Return
found 2 days ago
Select United flight, departing Fri, 5 Sep. from London to Seattle, returning Fri, 12 Sep., priced at AU$1,007 found 2 days ago
Delta
Tue, 2 Sep. - Tue, 9 Sep.
LHR
London
SEA
Seattle
AU$1,030 Return, found 5 days ago
AU$1,030
Return
found 5 days ago
Select Delta flight, departing Tue, 2 Sep. from London to Seattle, returning Tue, 9 Sep., priced at AU$1,030 found 5 days ago
Lufthansa
Sun, 21 Sep. - Sun, 12 Oct.
LHR
London
SEA
Seattle
AU$1,041 Return, found 1 day ago
AU$1,041
Return
found 1 day ago
Select Lufthansa flight, departing Sun, 21 Sep. from London to Seattle, returning Sun, 12 Oct., priced at AU$1,041 found 1 day ago
Aer Lingus
Wed, 15 Oct. - Wed, 22 Oct.
LHR
London
SEA
Seattle
AU$1,048 Return, found 1 day ago
AU$1,048
Return
found 1 day ago
Select Aer Lingus flight, departing Wed, 15 Oct. from London to Seattle, returning Wed, 22 Oct., priced at AU$1,048 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.