Flights From London (LON) to SeaTac (SEA)

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Selected fares from London to SeaTac

The cheapest prices found with in the last 7 days for return flights were CA $783 and CA $717 for one-way flights to SeaTac for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Mon., 21 Apr. - Tue., 6 May
LHR
Heathrow
SEA
Seattle - Tacoma Intl.
CA $783 Roundtrip, found 5 days ago
CA $783
Roundtrip
found 5 days ago
Select Icelandair flight, departing Mon., 21 Apr. from Heathrow to Seattle - Tacoma Intl., returning Tue., 6 May, priced at CA $783 found 5 days ago
Air Canada
Mon., 3 Nov. - Mon., 10 Nov.
LHR
Heathrow
SEA
Seattle - Tacoma Intl.
CA $860 Roundtrip, found 6 days ago
CA $860
Roundtrip
found 6 days ago
Select Air Canada flight, departing Mon., 3 Nov. from Heathrow to Seattle - Tacoma Intl., returning Mon., 10 Nov., priced at CA $860 found 6 days ago
Icelandair
Thu., 15 May - Sun., 18 May
LGW
Gatwick
SEA
Seattle - Tacoma Intl.
CA $892 Roundtrip, found 3 days ago
CA $892
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu., 15 May from Gatwick to Seattle - Tacoma Intl., returning Sun., 18 May, priced at CA $892 found 3 days ago