AirHint found the following cheapest return flights from Seoul (ICN) to Copenhagen (CPH) in December 2025 (see full year).

Return flights

30 Dec - 06 Jan	Air France
30 Dec - 07 Jan	Air France
28 Dec - 06 Jan	KLM
29 Dec - 07 Jan	Air France
29 Dec - 06 Jan	Air France
30 Dec - 11 Jan	Air France
31 Dec - 07 Jan	Air France
27 Dec - 01 Jan	Etihad Airways
30 Dec - 05 Jan	Lufthansa
29 Dec - 05 Jan	Air France
22 Dec - 31 Dec	Air France
27 Dec - 31 Dec	LOT
24 Dec - 31 Dec	Air France
23 Dec - 31 Dec	KLM
24 Dec - 29 Dec	Air France
22 Dec - 25 Dec	Air France
22 Dec - 26 Dec	Air France
22 Dec - 27 Dec	Air France
25 Dec - 29 Dec	KLM
26 Dec - 27 Dec	Turkish Airlines

Also check the deals for one-way flights from Seoul to Copenhagen 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 Seoul to Copenhagen in December from $627

Return flights