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

Return flights

14 Oct - 06 Nov	Ryanair
12 Oct - 06 Nov	Ryanair
08 Oct - 15 Oct	Ryanair
08 Oct - 16 Oct	Ryanair
01 Oct - 27 Oct	Ryanair
21 Oct - 27 Oct	Ryanair
20 Oct - 27 Oct	Ryanair
07 Oct - 13 Nov	Ryanair
02 Oct - 27 Oct	Ryanair
07 Oct - 27 Oct	Ryanair
15 Oct - 27 Oct	Ryanair
22 Oct - 27 Oct	Ryanair
23 Oct - 25 Nov	Ryanair
22 Oct - 28 Oct	Ryanair
25 Oct - 06 Nov	Ryanair
14 Oct - 08 Nov	Ryanair
20 Oct - 10 Nov	Ryanair
20 Oct - 08 Nov	Ryanair
22 Oct - 08 Nov	Ryanair
14 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 636€

Return flights