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

Return flights

12 Dec - 13 Dec	Lufthansa
04 Dec - 06 Dec	Lufthansa
05 Dec - 07 Dec	Lufthansa
12 Dec - 14 Dec	Lufthansa
15 Dec - 16 Dec	Air Serbia	direct
10 Dec - 17 Dec	Air Serbia	direct
13 Dec - 16 Dec	Air Serbia	direct
03 Dec - 07 Dec	SWISS
04 Dec - 06 Dec	Air Serbia	direct
13 Dec - 15 Dec	Air Serbia
27 Dec - 12 Jan	Air Serbia
30 Dec - 03 Jan	Air Serbia
27 Dec - 03 Jan	Air Serbia	direct
30 Dec - 03 Jan	Air Serbia	direct
30 Dec - 05 Jan	Air Serbia	direct
30 Dec - 04 Jan	Air Serbia	direct
28 Dec - 02 Jan	Air Serbia	direct

Also check the deals for one-way flights from Belgrade 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 Belgrade to Ljubljana in December from $196

Return flights