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

Return flights

28 Oct - 07 Nov	China Southern
28 Oct - 03 Nov	China Southern
28 Oct - 14 Nov	China Southern
28 Oct - 21 Nov	China Southern
02 Oct - 21 Oct	Air China
02 Oct - 12 Oct	Air China
02 Oct - 11 Oct	Air China
02 Oct - 13 Oct	Air China
02 Oct - 20 Oct	Air China
02 Oct - 24 Oct	Air China
02 Oct - 16 Oct	Air China
02 Oct - 18 Oct	Air China
24 Oct - 29 Oct	Norwegian
22 Oct - 02 Nov	easyJet
28 Oct - 05 Nov	China Southern
01 Oct - 16 Oct	Wizz Air UK
29 Oct - 15 Nov	China Eastern
29 Oct - 06 Nov	China Eastern
27 Oct - 08 Nov	China Eastern
20 Oct - 04 Nov	Wizz Air UK

Also check the deals for one-way flights from London to Seoul 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 London to Seoul in October from 420€

Return flights