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

Return flights

23 Oct - 05 Nov	Ryanair
27 Oct - 05 Nov	Ryanair
26 Oct - 05 Nov	Ryanair
20 Oct - 09 Nov	Ryanair
25 Oct - 07 Nov	Ryanair
22 Oct - 05 Nov	Ryanair
21 Oct - 26 Oct	Ryanair
30 Oct - 09 Nov	Ryanair
31 Oct - 13 Nov	Ryanair
22 Oct - 02 Nov	Ryanair
29 Oct - 07 Nov	Ryanair
26 Oct - 31 Oct	Ryanair
23 Oct - 31 Oct	Ryanair
24 Oct - 30 Oct	Ryanair
21 Oct - 29 Oct	Ryanair
18 Oct - 21 Oct	Ryanair
03 Oct - 15 Oct	Ryanair
17 Oct - 30 Oct	Ryanair
02 Oct - 30 Oct	Pegasus Airlines
02 Oct - 15 Oct	Pegasus Airlines

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 446€

Return flights