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

Return flights

18 Dec - 03 Jan	Air China
16 Dec - 26 Dec	Air China
17 Dec - 03 Jan	Air China
04 Dec - 05 Dec	Air China
07 Dec - 12 Dec	Air China
07 Dec - 14 Dec	Air China
18 Dec - 02 Jan	Air China
20 Dec - 30 Dec	Air China
23 Dec - 30 Dec	Air China
08 Dec - 22 Dec	Air China
23 Dec - 28 Dec	Air China
22 Dec - 25 Dec	Air China
24 Dec - 30 Dec	Air China
21 Dec - 03 Jan	Air China
23 Dec - 02 Jan	Air China
20 Dec - 03 Jan	Air China
19 Dec - 02 Jan	Air China
23 Dec - 01 Jan	Air China
07 Dec - 06 Jan	Air China
24 Dec - 01 Jan	Air China

Also check the deals for one-way flights from Seoul to London 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 Seoul to London in December from 617€

Return flights