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

Return flights

13 Jan - 25 Jan	Royal Brunei
28 Jan - 31 Jan	Lufthansa
28 Jan - 04 Feb	Lufthansa
28 Jan - 07 Feb	Lufthansa
29 Jan - 31 Jan	Lufthansa
26 Jan - 07 Feb	Lufthansa
25 Jan - 31 Jan	Lufthansa
31 Jan - 07 Feb	Lufthansa
21 Jan - 28 Jan	Lufthansa
28 Jan - 01 Feb	Finnair
27 Jan - 03 Feb	Finnair
20 Jan - 10 Feb	Finnair
13 Jan - 10 Feb	Finnair
13 Jan - 09 Feb	Finnair
14 Jan - 23 Jan	Finnair
28 Jan - 25 Feb	Finnair
20 Jan - 29 Jan	Finnair
06 Jan - 13 Jan	Finnair
20 Jan - 27 Jan	Finnair
23 Jan - 25 Jan	Lufthansa

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 $665

Return flights