AirHint found the following cheapest return flights from Seattle (SEA) to London (STN) in November 2025 (see full year).

Return flights

28 Nov - 02 Dec	Icelandair
06 Nov - 13 Nov	Icelandair
07 Nov - 12 Nov	Lufthansa
07 Nov - 13 Nov	Lufthansa
13 Nov - 16 Nov	Icelandair
23 Nov - 01 Dec	Air Canada
03 Nov - 18 Nov	Icelandair
05 Nov - 12 Nov	Icelandair
29 Nov - 06 Dec	Lufthansa
04 Nov - 11 Nov	Icelandair
14 Nov - 17 Nov	Scandinavian Airlines
25 Nov - 29 Nov	Air Canada
30 Nov - 07 Dec	Air Canada
20 Nov - 13 Dec	Alaska Airlines
29 Nov - 07 Dec	Air France
12 Nov - 06 Dec	Hawaiian Airlines
03 Nov - 08 Nov	Icelandair
16 Nov - 12 Dec	Hawaiian Airlines
28 Nov - 20 Dec	Lufthansa
23 Nov - 13 Dec	Alaska Airlines

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

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 November from 419€

Return flights