AirHint found the following cheapest return flights from London (LGW) to Seoul (ICN) in December 2026 (see full year).

Return flights

01 Dec - 19 Dec	China Eastern
01 Dec - 11 Dec	China Eastern
01 Dec - 18 Dec	China Eastern
12 Dec - 19 Dec	Ryanair
03 Dec - 09 Dec	Ryanair
01 Dec - 15 Dec	Ryanair
12 Dec - 04 Jan	Ryanair
03 Dec - 14 Dec	Turkish Airlines
03 Dec - 17 Dec	Turkish Airlines
26 Dec - 31 Dec	China Eastern
05 Dec - 12 Dec	Turkish Airlines
29 Dec - 10 Jan	Ryanair
08 Dec - 04 Jan	Ryanair
10 Dec - 01 Jan	Ryanair
17 Dec - 04 Jan	Wizz Air
12 Dec - 03 Jan	Ryanair
12 Dec - 01 Jan	Wizz Air UK
17 Dec - 05 Jan	Wizz Air
11 Dec - 01 Jan	China Eastern
28 Dec - 10 Jan	Ryanair

Also check the deals for one-way flights from London to Seoul 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 London to Seoul in December from 541€

Return flights