AirHint found the following cheapest return flights from Porto (OPO) to Ljubljana (LJU) in May 2026 (see full year).
Return flights
| 07 May - 10 May | SWISS | ||
| 01 May - 04 May | SWISS | ||
| 15 May - 17 May | SWISS | ||
| 13 May - 17 May | Lufthansa | ||
| 18 May - 24 May | SWISS | ||
| 24 May - 07 Jun | Vueling Airlines |
Also check the deals for one-way flights from Porto to Ljubljana in May.
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