AirHint found the following cheapest return flights from Belgrade (BEG) to Banja Luka (BNX) in December 2025 (see full year).
Return flights
| 05 Dec - 15 Dec | Air Serbia | direct | |
| 05 Dec - 08 Dec | Air Serbia | direct | |
| 12 Dec - 15 Dec | Air Serbia | direct | |
| 05 Dec - 07 Dec | Air Serbia | ||
| 04 Dec - 14 Dec | Wizz Air | ||
| 21 Dec - 28 Dec | Air Serbia |
Also check the deals for one-way flights from Belgrade to Banja Luka in December.
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