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

Return flights

06 Dec - 11 Dec	Air China
14 Dec - 31 Dec	Lufthansa
15 Dec - 01 Jan	Lufthansa
01 Dec - 09 Dec	Lufthansa
01 Dec - 14 Dec	Lufthansa
05 Dec - 14 Dec	Lufthansa
25 Dec - 31 Dec	Lufthansa
25 Dec - 01 Jan	Lufthansa
05 Dec - 12 Dec	Lufthansa
26 Dec - 01 Jan	Lufthansa
26 Dec - 09 Jan	Lufthansa
17 Dec - 25 Dec	Lufthansa
08 Dec - 29 Dec	Air France
18 Dec - 25 Dec	Lufthansa
26 Dec - 04 Jan	Etihad Airways
29 Dec - 06 Jan	Lufthansa
29 Dec - 01 Jan	Lufthansa
27 Dec - 04 Jan	Etihad Airways
24 Dec - 09 Jan	Turkish Airlines
27 Dec - 05 Jan	Etihad Airways

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 $645

Return flights