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

Return flights

01 Dec - 07 Dec	China Eastern
01 Dec - 06 Dec	China Eastern
05 Dec - 13 Dec	Air China
04 Dec - 11 Dec	China Eastern
02 Dec - 13 Dec	China Eastern
05 Dec - 12 Dec	China Eastern
26 Dec - 31 Dec	China Eastern
25 Dec - 07 Jan	Vueling Airlines
13 Dec - 22 Dec	Wizz Air UK
01 Dec - 10 Dec	China Eastern
13 Dec - 05 Jan	Wizz Air UK
01 Dec - 15 Dec	China Eastern
18 Dec - 02 Jan	Aegean Airlines
01 Dec - 04 Jan	China Eastern
01 Dec - 01 Jan	China Eastern
26 Dec - 13 Jan	Air China
19 Dec - 06 Jan	Air China
24 Dec - 10 Jan	Air China
26 Dec - 04 Jan	China Eastern
30 Dec - 06 Jan	China Eastern

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 696€

Return flights