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

Return flights

08 Dec - 09 Dec	Air Serbia
05 Dec - 11 Dec	SWISS
06 Dec - 08 Dec	Lufthansa
05 Dec - 06 Dec	Air Serbia
09 Dec - 11 Dec	Air Serbia
06 Dec - 07 Dec	Air Serbia
16 Dec - 16 Jan	Lufthansa
12 Dec - 14 Dec	SWISS
11 Dec - 15 Dec	SWISS
12 Dec - 15 Dec	SWISS
13 Dec - 15 Dec	SWISS
16 Dec - 16 Jan	Air Serbia	direct
18 Dec - 15 Jan	Air Serbia	direct
01 Dec - 01 Jan	Air Serbia	direct
26 Dec - 10 Jan	Air Serbia	direct
30 Dec - 06 Jan	Air Serbia	direct
29 Dec - 05 Jan	Air Serbia	direct
27 Dec - 02 Jan	Air Serbia	direct
26 Dec - 02 Jan	Air Serbia	direct
26 Dec - 04 Jan	Air Serbia	direct

Also check the deals for one-way flights from Ljubljana to Belgrade 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 Ljubljana to Belgrade in December from 151€

Return flights