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

Return flights

11 Dec - 18 Dec	KLM
11 Dec - 19 Dec	KLM
27 Dec - 29 Dec	LOT
17 Dec - 31 Dec	Lufthansa
18 Dec - 24 Dec	Lufthansa
21 Dec - 28 Dec	Lufthansa
20 Dec - 30 Dec	Lufthansa
26 Dec - 30 Dec	Lufthansa
27 Dec - 04 Jan	LOT
19 Dec - 03 Jan	LOT
10 Dec - 12 Dec	Air Serbia
27 Dec - 30 Dec	Lufthansa
30 Dec - 03 Jan	LOT
31 Dec - 03 Jan	SWISS
25 Dec - 04 Jan	LOT
23 Dec - 04 Jan	Lufthansa
30 Dec - 01 Jan	Ryanair

Also check the deals for one-way flights from Duesseldorf to Ljubljana 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 Duesseldorf to Ljubljana in December from $275

Return flights