Cheapest return flights from Seattle to London in October from 402€

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

Return flights

20 Oct - 29 Oct Icelandair
16 Oct - 23 Oct Icelandair
28 Oct - 05 Nov Lufthansa
01 Oct - 21 Oct Delta
01 Oct - 14 Oct Delta
20 Oct - 29 Oct British Airways direct
21 Oct - 28 Oct British Airways direct
01 Oct - 08 Oct British Airways direct
07 Oct - 14 Oct Air France direct
01 Oct - 14 Oct British Airways direct
15 Oct - 24 Oct British Airways direct
27 Oct - 04 Nov Air France direct
28 Oct - 05 Nov British Airways direct
24 Oct - 03 Nov Icelandair
22 Oct - 03 Nov Aer Lingus
30 Oct - 11 Nov Delta
26 Oct - 02 Nov British Airways direct
31 Oct - 07 Nov British Airways direct
28 Oct - 03 Nov Delta direct
22 Oct - 03 Nov Air France direct

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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