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

Return flights

04 Dec - 20 Dec	Air China
29 Dec - 12 Jan	Air China
01 Dec - 10 Dec	Japan Airlines
08 Dec - 22 Dec	Air China
13 Dec - 23 Dec	Air China
01 Dec - 07 Dec	Air China
26 Dec - 09 Jan	Air China
30 Dec - 12 Jan	Air China
08 Dec - 15 Dec	ANA
30 Dec - 04 Jan	Air China
11 Dec - 03 Jan	China Airlines
31 Dec - 12 Jan	Air China
26 Dec - 02 Jan	Air China
27 Dec - 08 Jan	Air China
28 Dec - 08 Jan	Air China
29 Dec - 05 Jan	Air China
12 Dec - 27 Dec	China Airlines
26 Dec - 31 Dec	Air China
21 Dec - 31 Dec	Air China
05 Dec - 07 Dec	Japan Airlines

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 900€

Return flights