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

Return flights

12 Dec - 14 Dec	SWISS
05 Dec - 07 Dec	SWISS
12 Dec - 14 Dec	Brussels Airlines	direct
05 Dec - 10 Dec	Air Serbia
05 Dec - 07 Dec	Brussels Airlines	direct
13 Dec - 15 Dec	LOT
06 Dec - 10 Dec	LOT
05 Dec - 09 Dec	LOT
17 Dec - 21 Dec	LOT
05 Dec - 08 Dec	LOT
29 Dec - 04 Jan	LOT
28 Dec - 04 Jan	Brussels Airlines	direct
29 Dec - 02 Jan	LOT
22 Dec - 04 Jan	LOT
19 Dec - 04 Jan	LOT
20 Dec - 04 Jan	LOT
29 Dec - 02 Jan	Brussels Airlines	direct
28 Dec - 15 Jan	Vueling Airlines
17 Dec - 02 Jan	Brussels Airlines	direct
22 Dec - 02 Jan	Brussels Airlines	direct

Also check the deals for one-way flights from Brussels 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 Brussels to Ljubljana in December from 178€

Return flights