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

Return flights

10 Dec - 14 Dec	SWISS
23 Dec - 05 Jan	SWISS
12 Dec - 15 Dec	Brussels Airlines
12 Dec - 14 Dec	Brussels Airlines
06 Dec - 12 Dec	SWISS
04 Dec - 07 Dec	SWISS
11 Dec - 16 Dec	SWISS
03 Dec - 06 Dec	SWISS
23 Dec - 29 Dec	Air Serbia
19 Dec - 24 Dec	SWISS
06 Dec - 10 Dec	SWISS
31 Dec - 07 Jan	SWISS
19 Dec - 04 Jan	airBaltic
26 Dec - 02 Jan	Air Serbia
29 Dec - 02 Jan	LOT
30 Dec - 06 Jan	LOT
28 Dec - 04 Jan	LOT
30 Dec - 02 Jan	LOT

Also check the deals for one-way flights from Ljubljana 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.

Book a cheap hotel in Copenhagen

Cheap car rent in Copenhagen

Cheapest return flights from Ljubljana to Copenhagen in December from 174€

Return flights