AirHint found the following cheapest return flights from Bucharest (OTP) to Ljubljana (LJU) in December 2025 (see full year).
Return flights
| 24 Dec - 27 Dec | Air Serbia | ||
| 12 Dec - 28 Dec | Ryanair | ||
| 09 Dec - 12 Dec | Air Serbia | ||
| 29 Dec - 08 Jan | Air Serbia | ||
| 03 Dec - 10 Dec | LOT | ||
| 03 Dec - 06 Dec | Lufthansa | ||
| 01 Dec - 03 Dec | LOT |
Also check the deals for one-way flights from Bucharest to Ljubljana in December.
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