Cheapest return flights from Seattle to London in January from 441€

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

Return flights

19 Jan - 26 Jan Icelandair
08 Jan - 15 Jan Icelandair
09 Jan - 16 Jan Icelandair
29 Jan - 05 Feb Icelandair
06 Jan - 03 Feb Icelandair
06 Jan - 03 Feb Air France direct
09 Jan - 16 Jan British Airways direct
29 Jan - 05 Feb British Airways direct
19 Jan - 26 Jan British Airways direct
08 Jan - 15 Jan Air France direct

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

Skyscanner

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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