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

Return flights

31 Dec - 22 Jan	China Eastern
31 Dec - 19 Jan	Wizz Air
30 Dec - 20 Jan	Turkish Airlines
30 Dec - 22 Jan	Wizz Air
30 Dec - 14 Jan	Turkish Airlines
30 Dec - 30 Jan	Turkish Airlines
30 Dec - 23 Jan	Turkish Airlines
29 Dec - 22 Jan	easyJet
28 Dec - 19 Jan	Vueling Airlines
27 Dec - 15 Jan	Turkmenistan Airlines
28 Dec - 30 Dec	Vueling Airlines
29 Dec - 30 Dec	easyJet
29 Dec - 31 Dec	easyJet
28 Dec - 31 Dec	easyJet
27 Dec - 31 Dec	China Southern

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 563€

Return flights