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

Return flights

16 Nov - 22 Nov	Icelandair
16 Nov - 23 Nov	Icelandair
30 Nov - 07 Dec	Icelandair
17 Nov - 24 Nov	Icelandair
23 Nov - 27 Nov	Icelandair
03 Nov - 13 Nov	Lufthansa
23 Nov - 30 Nov	Aer Lingus
24 Nov - 30 Nov	Aer Lingus
06 Nov - 11 Nov	Icelandair
27 Nov - 29 Nov	Air Canada
20 Nov - 01 Dec	Icelandair
04 Nov - 16 Nov	Hawaiian Airlines
13 Nov - 06 Dec	Icelandair

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 $486

Return flights