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

Return flights

30 Oct - 12 Nov	China Eastern
29 Oct - 17 Nov	China Eastern
29 Oct - 18 Nov	China Eastern
30 Oct - 25 Nov	China Eastern
29 Oct - 26 Nov	Air China
29 Oct - 12 Nov	Air China
28 Oct - 19 Nov	Air China
28 Oct - 28 Nov	Air China
29 Oct - 19 Nov	Air China
28 Oct - 12 Nov	Air China
20 Oct - 27 Oct	Hainan Airlines
20 Oct - 28 Oct	Hainan Airlines
29 Oct - 31 Oct	Air China
27 Oct - 30 Oct	Air China
23 Oct - 28 Oct	Etihad Airways
22 Oct - 31 Oct	Hainan Airlines
22 Oct - 29 Oct	Hainan Airlines
26 Oct - 30 Oct	Air India
21 Oct - 29 Oct	China Southern
21 Oct - 26 Oct	Air India

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 $452

Return flights