AirHint found the following cheapest return flights from Seoul (ICN) to London (LHR) in October 2026 (see full year).

Return flights

20 Oct - 28 Oct	Lufthansa
15 Oct - 26 Oct	Lufthansa
29 Oct - 05 Nov	Lufthansa
22 Oct - 08 Nov	Lufthansa
20 Oct - 31 Oct	Air China
17 Oct - 30 Oct	Air China
14 Oct - 24 Oct	Air China
23 Oct - 01 Nov	Air China
21 Oct - 01 Nov	Air China
12 Oct - 19 Oct	Air China
18 Oct - 24 Oct	Air China
16 Oct - 24 Oct	Air China
17 Oct - 24 Oct	Air China
26 Oct - 01 Nov	Air China
26 Oct - 02 Nov	Air China
17 Oct - 17 Oct	Air China
22 Oct - 08 Nov	Asiana Airlines	direct
23 Oct - 01 Nov	Asiana Airlines	direct
21 Oct - 01 Nov	Asiana Airlines	direct
26 Oct - 01 Nov	Asiana Airlines	direct

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

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 Seoul to London in October from $689

Return flights