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

Return flights

25 Oct - 02 Nov	ITA Airways
29 Oct - 13 Nov	KLM
25 Oct - 01 Nov	ITA Airways
29 Oct - 06 Nov	KLM
20 Oct - 20 Nov	KLM
02 Oct - 14 Oct	KLM
02 Oct - 15 Oct	KLM
02 Oct - 21 Oct	KLM
02 Oct - 09 Oct	KLM
03 Oct - 15 Oct	SWISS
30 Oct - 18 Nov	KLM
30 Oct - 16 Nov	KLM
03 Oct - 08 Oct	SWISS
30 Oct - 11 Nov	KLM
30 Oct - 30 Nov	KLM
02 Oct - 10 Oct	KLM
01 Oct - 08 Oct	KLM
02 Oct - 08 Oct	KLM
27 Oct - 09 Nov	KLM
20 Oct - 30 Oct	KLM

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 $754

Return flights