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

Return flights

21 Jan - 28 Jan	China Eastern
19 Jan - 20 Jan	Air China
28 Jan - 01 Feb	China Southern
26 Jan - 01 Feb	China Southern
18 Jan - 26 Jan	Air China
27 Jan - 27 Jan	Air China
24 Jan - 24 Jan	China Eastern
18 Jan - 29 Jan	Air China
29 Jan - 31 Jan	Air China
28 Jan - 29 Jan	Air China
26 Jan - 31 Jan	Air China
28 Jan - 31 Jan	Air China
18 Jan - 04 Feb	Air China
18 Jan - 03 Feb	Air China
27 Jan - 03 Feb	Air China
26 Jan - 05 Feb	Air China
27 Jan - 05 Feb	Air China
29 Jan - 04 Feb	Air China
27 Jan - 02 Feb	Air China
28 Jan - 04 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 419€

Return flights