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

Return flights

18 Nov - 25 Nov	Icelandair
26 Nov - 03 Dec	Icelandair
19 Nov - 25 Nov	Icelandair
14 Nov - 17 Nov	Lufthansa
27 Nov - 02 Dec	Icelandair
11 Nov - 25 Nov	Icelandair
18 Nov - 13 Dec	Lufthansa
26 Nov - 07 Dec	Icelandair
13 Nov - 17 Nov	Air Canada
20 Nov - 27 Nov	Icelandair
23 Nov - 08 Dec	Air Canada
14 Nov - 06 Dec	SWISS
11 Nov - 06 Dec	Icelandair
17 Nov - 20 Nov	Frontier Airlines
15 Nov - 06 Dec	Frontier Airlines
25 Nov - 01 Dec	WestJet
17 Nov - 13 Dec	Hawaiian Airlines
23 Nov - 26 Nov	Air Canada
15 Nov - 22 Nov	Condor
26 Nov - 29 Nov	Aer Lingus

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 $485

Return flights