AirHint found the following cheapest one-way flights from Seoul (ICN) to London (LGW) in October 2025 (see full year).

One-Way flights

26 Oct	Thai AirAsia X
28 Oct	Thai AirAsia X
29 Oct	Thai AirAsia X
14 Oct	Sichuan Airlines
16 Oct	Sichuan Airlines
23 Oct	T'way Air
24 Oct	China Southern
13 Oct	Vietnam Airlines
27 Oct	China Southern
12 Oct	HK Express

Also check the deals for return flights from Seoul to London 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 one-way flights from Seoul to London in October from 197€

One-Way flights