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

Return flights

05 Feb - 08 Feb	Icelandair
24 Feb - 06 Mar	Icelandair
08 Feb - 28 Feb	Icelandair
17 Feb - 24 Feb	Icelandair
09 Feb - 07 Mar	Icelandair
10 Feb - 07 Mar	Icelandair
18 Feb - 14 Mar	Icelandair
06 Feb - 16 Feb	Icelandair
02 Feb - 06 Feb	Icelandair
26 Feb - 05 Mar	Icelandair
09 Feb - 17 Feb	Icelandair
25 Feb - 21 Mar	Icelandair
03 Feb - 06 Feb	Alaska Airlines
07 Feb - 15 Feb	Icelandair
06 Feb - 21 Feb	Air Canada
14 Feb - 20 Feb	Icelandair

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 $483

Return flights