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

Return flights

18 Feb - 05 Mar	Icelandair
18 Feb - 25 Feb	Icelandair
15 Feb - 22 Feb	Icelandair
16 Feb - 23 Feb	Icelandair
06 Feb - 28 Feb	Icelandair
16 Feb - 25 Feb	Icelandair
21 Feb - 28 Feb	Icelandair
19 Feb - 27 Feb	Icelandair
07 Feb - 28 Feb	Icelandair
26 Feb - 05 Mar	Icelandair
05 Feb - 28 Feb	Icelandair
18 Feb - 05 Mar	Virgin Atlantic	direct
10 Feb - 17 Feb	Icelandair
26 Feb - 05 Mar	British Airways	direct
14 Feb - 08 Mar	Lufthansa

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Seattle to London in February from 416€

Return flights