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

Return flights

20 Oct - 28 Oct	Air China
01 Oct - 17 Oct	Air China
01 Oct - 18 Oct	Air China
01 Oct - 15 Oct	China Southern
28 Oct - 04 Nov	China Southern
24 Oct - 06 Nov	Air China
29 Oct - 09 Nov	Air China
24 Oct - 09 Nov	Air China
27 Oct - 09 Nov	Air China
20 Oct - 02 Nov	Air China
30 Oct - 09 Nov	Air China
26 Oct - 02 Nov	Air China
28 Oct - 09 Nov	Air China
28 Oct - 13 Nov	Air China
22 Oct - 29 Oct	Air China
16 Oct - 22 Oct	Air China
03 Oct - 14 Oct	Air China
14 Oct - 22 Oct	Air China
20 Oct - 29 Oct	Air China
14 Oct - 29 Oct	Air China

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 $613

Return flights