Cheapest return flights from Seattle to London in October from 401€

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

Return flights

14 Oct - 21 Oct Aer Lingus
06 Oct - 09 Oct Aer Lingus
08 Oct - 23 Oct Icelandair
09 Oct - 23 Oct Icelandair
18 Oct - 31 Oct Icelandair
15 Oct - 11 Nov Icelandair
17 Oct - 21 Oct Aer Lingus
02 Oct - 06 Oct Icelandair
24 Oct - 03 Nov Aer Lingus
09 Oct - 17 Oct Icelandair
01 Oct - 04 Oct Aer Lingus
18 Oct - 21 Oct Aer Lingus
23 Oct - 09 Nov Icelandair

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

Skyscanner

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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