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

Return flights

19 Nov - 08 Dec	Icelandair
18 Nov - 25 Nov	Icelandair
24 Nov - 04 Dec	Icelandair
27 Nov - 04 Dec	Icelandair
26 Nov - 03 Dec	Icelandair
05 Nov - 26 Nov	Aer Lingus
05 Nov - 12 Nov	Aer Lingus
03 Nov - 14 Nov	Aer Lingus
29 Nov - 06 Dec	Lufthansa
04 Nov - 19 Nov	Delta
04 Nov - 19 Nov	Delta	direct
05 Nov - 12 Nov	Virgin Atlantic	direct
17 Nov - 02 Dec	KLM	direct
28 Nov - 03 Dec	Aer Lingus
26 Nov - 07 Dec	Aer Lingus
24 Nov - 02 Dec	Delta	direct
20 Nov - 23 Nov	Icelandair
12 Nov - 06 Dec	British Airways	direct
14 Nov - 20 Nov	British Airways
14 Nov - 21 Nov	Iberia

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 $494

Return flights