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

Return flights

31 Dec - 18 Jan	Wizz Air
10 Dec - 31 Jan	Wizz Air
07 Dec - 13 Dec	easyJet
07 Dec - 16 Dec	easyJet
07 Dec - 12 Dec	easyJet
07 Dec - 25 Dec	easyJet
06 Dec - 18 Dec	easyJet
06 Dec - 24 Dec	easyJet
06 Dec - 22 Dec	easyJet
07 Dec - 22 Dec	easyJet
07 Dec - 21 Dec	easyJet
07 Dec - 21 Jan	easyJet
07 Dec - 09 Dec	easyJet
06 Dec - 31 Jan	easyJet
15 Dec - 28 Jan	easyJet
15 Dec - 27 Jan	easyJet
31 Dec - 14 Jan	easyJet
29 Dec - 21 Jan	Norwegian Air Sweden AOC
16 Dec - 21 Jan	Air Europa
10 Dec - 12 Jan	Wizz Air

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 483€

Return flights