AirHint found the following cheapest return flights from Sofia (SOF) to Ljubljana (LJU) in May 2026 (see full year).
Return flights
| 09 May - 16 May | SWISS | ||
| 07 May - 11 May | Lufthansa | ||
| 27 May - 31 May | Lufthansa | ||
| 26 May - 31 May | Lufthansa | ||
| 24 May - 28 May | Air Serbia | ||
| 18 May - 24 May | Air Serbia | ||
| 28 May - 30 Jun | Lufthansa |
Also check the deals for one-way flights from Sofia to Ljubljana in May.
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