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

Return flights

04 Dec - 11 Dec	KLM
04 Dec - 13 Dec	KLM
04 Dec - 16 Jan	KLM
07 Dec - 13 Dec	KLM
09 Dec - 26 Dec	KLM
31 Dec - 09 Jan	KLM
27 Dec - 03 Jan	KLM
28 Dec - 03 Jan	KLM
17 Dec - 24 Dec	KLM
17 Dec - 15 Jan	KLM
17 Dec - 01 Jan	KLM
17 Dec - 05 Jan	KLM
11 Dec - 01 Jan	KLM
27 Dec - 05 Jan	KLM
26 Dec - 16 Jan	KLM
26 Dec - 31 Dec	KLM
12 Dec - 19 Dec	KLM
20 Dec - 30 Dec	KLM
13 Dec - 17 Dec	KLM
01 Dec - 07 Dec	SWISS

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 $846

Return flights