AirHint found the following cheapest return flights from Seattle (SEA) to London (LHR) in February 2026 (see full year).

Return flights

04 Feb - 09 Feb	Icelandair
15 Feb - 23 Feb	Air Canada
03 Feb - 10 Feb	British Airways	direct
23 Feb - 02 Mar	Icelandair
14 Feb - 21 Feb	Air Canada
04 Feb - 09 Feb	British Airways	direct
13 Feb - 20 Feb	British Airways	direct
23 Feb - 02 Mar	British Airways	direct
15 Feb - 23 Feb	British Airways	direct
14 Feb - 21 Feb	British Airways	direct
03 Feb - 12 Feb	Aer Lingus	direct
04 Feb - 13 Feb	Aer Lingus	direct
21 Feb - 02 Mar	Aer Lingus	direct

Also check the deals for one-way flights from Seattle to London in February.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Seattle to London in February from $488

Return flights