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

Return flights

15 Oct - 22 Oct	Ryanair
16 Oct - 21 Oct	Ryanair
02 Oct - 15 Oct	Ryanair
02 Oct - 14 Oct	Ryanair
03 Oct - 14 Oct	Ryanair
14 Oct - 21 Oct	Ryanair
01 Oct - 15 Oct	Ryanair
15 Oct - 21 Oct	Ryanair
01 Oct - 14 Oct	Ryanair
02 Oct - 09 Oct	Ryanair
15 Oct - 15 Nov	Ryanair
29 Oct - 12 Nov	Pegasus Airlines
29 Oct - 15 Nov	Pegasus Airlines
16 Oct - 04 Nov	Ryanair
14 Oct - 01 Nov	Ryanair
28 Oct - 08 Nov	Ryanair
20 Oct - 11 Nov	Ryanair
17 Oct - 01 Nov	Ryanair
29 Oct - 13 Nov	Pegasus Airlines
18 Oct - 07 Nov	Ryanair

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 570€

Return flights