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

Return flights

31 Dec - 07 Jan	SWISS
31 Dec - 07 Jan	Luxair	direct
30 Dec - 02 Jan	KLM
29 Dec - 02 Jan	KLM
29 Dec - 31 Dec	Lufthansa
28 Dec - 05 Jan	Lufthansa
30 Dec - 04 Jan	Lufthansa
31 Dec - 01 Jan	Lufthansa
30 Dec - 01 Jan	Luxair	direct
29 Dec - 01 Jan	Lufthansa
28 Dec - 31 Dec	Lufthansa
28 Dec - 01 Jan	Lufthansa
28 Dec - 31 Dec	Luxair	direct
29 Dec - 31 Dec	Luxair	direct
28 Dec - 30 Dec	Luxair	direct

Also check the deals for one-way flights from Luxemburg 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 Luxemburg to Copenhagen in December from $253

Return flights