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

Return flights

07 Feb - 19 Feb	Virgin Atlantic
14 Feb - 28 Feb	Delta
02 Feb - 09 Feb	British Airways	direct
12 Feb - 19 Feb	British Airways	direct
07 Feb - 19 Feb	British Airways	direct
22 Feb - 01 Mar	British Airways	direct
14 Feb - 28 Feb	American Airlines	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 $520

Return flights