AirHint found the following cheapest return flights from Basel (BSL) to Ljubljana (LJU) in December 2025 (see full year).
Return flights
| 15 Dec - 20 Dec | Lufthansa | ||
| 07 Dec - 11 Dec | KLM | ||
| 29 Dec - 05 Jan | Lufthansa | ||
| 03 Dec - 07 Dec | easyJet | ||
| 01 Dec - 08 Dec | Wizz Air | ||
| 01 Dec - 04 Dec | easyJet | ||
| 28 Dec - 04 Jan | Wizz Air | ||
| 31 Dec - 02 Jan | easyJet |
Also check the deals for one-way flights from Basel to Ljubljana in December.
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