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

Return flights

27 Jan - 03 Feb	Air China
29 Jan - 05 Feb	Air China
15 Jan - 29 Jan	China Eastern
28 Jan - 04 Feb	Air China
31 Jan - 13 Feb	Air China
16 Jan - 23 Jan	Air China
31 Jan - 12 Feb	T'way Air
09 Jan - 16 Jan	China Eastern
31 Jan - 07 Feb	T'way Air
15 Jan - 16 Feb	China Eastern
23 Jan - 30 Jan	T'way Air
04 Jan - 11 Jan	Etihad Airways
19 Jan - 26 Jan	LOT
16 Jan - 31 Jan	T'way Air
19 Jan - 31 Jan	T'way Air
25 Jan - 29 Jan	Asiana Airlines
03 Jan - 10 Jan	Air China
29 Jan - 02 Feb	Air France
27 Jan - 02 Feb	Air France
30 Jan - 16 Feb	LOT

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 $422

Return flights