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

Return flights

01 Dec - 04 Dec	Air China
01 Dec - 29 Dec	Air China
01 Dec - 18 Dec	Air China
09 Dec - 16 Dec	Air China
28 Dec - 17 Jan	Air China
28 Dec - 11 Jan	Air China
03 Dec - 18 Dec	Air China
08 Dec - 15 Dec	Air China
11 Dec - 19 Dec	Lufthansa
13 Dec - 18 Dec	Air China
14 Dec - 18 Jan	Air China
01 Dec - 08 Dec	Japan Airlines
14 Dec - 21 Dec	ANA
08 Dec - 12 Jan	Air China
15 Dec - 14 Jan	ANA
17 Dec - 04 Jan	Air China
05 Dec - 09 Jan	Air China
20 Dec - 02 Jan	Iberia
21 Dec - 04 Jan	Air China
19 Dec - 02 Jan	SWISS

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 540€

Return flights