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

Return flights

28 Jan - 31 Jan	Air China
13 Jan - 24 Jan	Air China
14 Jan - 28 Jan	Air China
19 Jan - 29 Jan	Air China
24 Jan - 26 Jan	Air China
19 Jan - 26 Jan	Air China
28 Jan - 04 Feb	Air China
19 Jan - 13 Feb	Air China
28 Jan - 05 Feb	Air China
14 Jan - 21 Jan	Air China
21 Jan - 26 Jan	Air China
24 Jan - 31 Jan	Air China
17 Jan - 26 Jan	Air China
26 Jan - 04 Feb	Air China
28 Jan - 01 Feb	Air China
24 Jan - 01 Feb	Air China
27 Jan - 02 Feb	Air China
21 Jan - 03 Feb	Air China
29 Jan - 05 Feb	Air China
14 Jan - 11 Feb	Air China

Also check the deals for one-way flights from Seoul to London in January.

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 January from $748

Return flights