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

One-Way flights

29 Oct	Thai AirAsia X
28 Oct	Thai AirAsia X
19 Oct	China Eastern
23 Oct	China Eastern
17 Oct	China Southern
27 Oct	China Southern
22 Oct	China Southern
12 Oct	China Southern
21 Oct	Sichuan Airlines
20 Oct	China Southern

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 200€

One-Way flights