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

Return flights

18 Dec - 02 Jan	China Southern
21 Dec - 09 Jan	China Southern
21 Dec - 02 Jan	China Southern
18 Dec - 26 Dec	Air China
09 Dec - 07 Jan	Air China
04 Dec - 14 Dec	Air China
17 Dec - 28 Dec	China Southern
11 Dec - 16 Jan	China Southern
15 Dec - 26 Dec	Air China
01 Dec - 31 Dec	Air China
18 Dec - 31 Dec	Air China
22 Dec - 05 Jan	Asiana Airlines
24 Dec - 16 Jan	China Southern
31 Dec - 14 Jan	Etihad Airways
24 Dec - 07 Jan	Emirates
16 Dec - 05 Jan	Qatar Airways
16 Dec - 30 Dec	China Eastern
24 Dec - 31 Dec	Emirates
01 Dec - 04 Dec	Emirates
01 Dec - 08 Dec	Emirates

Also check the deals for one-way flights from Seoul to London in December.

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 Seoul to London in December from 539€

Return flights