AirHint found the following cheapest return flights from Ljubljana (LJU) to Bucharest (OTP) in December 2025 (see full year).
Return flights
| 03 Dec - 10 Dec | Air Serbia | ||
| 04 Dec - 05 Dec | Air Serbia | ||
| 25 Dec - 03 Jan | Air Serbia | ||
| 05 Dec - 08 Dec | Air Serbia | ||
| 04 Dec - 07 Dec | SWISS | ||
| 08 Dec - 12 Dec | Lufthansa |
Also check the deals for one-way flights from Ljubljana to Bucharest in December.
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