Cheapest return flights from Seattle to London in January from $490

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

Return flights

14 Jan - 18 Jan Icelandair
30 Jan - 07 Feb Icelandair
30 Jan - 08 Feb Icelandair
11 Jan - 25 Jan Icelandair
30 Jan - 06 Feb Icelandair
10 Jan - 17 Jan Icelandair
25 Jan - 30 Jan Icelandair
31 Jan - 08 Feb Icelandair
08 Jan - 22 Jan Icelandair
28 Jan - 04 Feb Icelandair
16 Jan - 19 Jan Air Canada
14 Jan - 23 Jan Icelandair
18 Jan - 25 Jan Icelandair
15 Jan - 19 Jan Icelandair
14 Jan - 22 Jan Lufthansa
28 Jan - 03 Feb Icelandair

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

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