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

Return flights

01 Dec - 07 Dec	Lufthansa
01 Dec - 08 Dec	Lufthansa
01 Dec - 10 Dec	Lufthansa
02 Dec - 06 Dec	Lufthansa
10 Dec - 18 Dec	Lufthansa
01 Dec - 09 Dec	Lufthansa
08 Dec - 15 Dec	Lufthansa
13 Dec - 23 Dec	Lufthansa
03 Dec - 14 Dec	Lufthansa
08 Dec - 22 Dec	Lufthansa
29 Dec - 11 Jan	Lufthansa
14 Dec - 08 Jan	Lufthansa
17 Dec - 06 Jan	Lufthansa
15 Dec - 01 Jan	LOT
12 Dec - 01 Jan	LOT
14 Dec - 01 Jan	LOT
27 Dec - 08 Jan	Lufthansa
27 Dec - 07 Jan	Lufthansa
17 Dec - 01 Jan	LOT
26 Dec - 09 Jan	LOT

Also check the deals for one-way flights from London to Seoul 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 London to Seoul in December from 469€

Return flights