Cheapest return flights from Seattle to London in October from 647€

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

Return flights

26 Oct - 02 Nov Lufthansa
19 Oct - 08 Nov Lufthansa
19 Oct - 04 Nov Alaska Airlines
20 Oct - 27 Oct Lufthansa
18 Oct - 22 Oct Icelandair
31 Oct - 06 Nov Alaska Airlines
17 Oct - 08 Nov Lufthansa
29 Oct - 22 Nov Icelandair
27 Oct - 03 Nov Aer Lingus
24 Oct - 15 Nov Lufthansa
18 Oct - 08 Nov Icelandair
21 Oct - 15 Nov Icelandair
21 Oct - 22 Oct WestJet
23 Oct - 26 Oct Air Canada
19 Oct - 22 Oct Alaska Airlines
24 Oct - 26 Oct Lufthansa
20 Oct - 25 Oct Icelandair
25 Oct - 28 Oct Alaska Airlines

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

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