AirHint found the following cheapest one-way flights from Madrid (MAD) to Ljubljana (LJU) in September 2026 (see full year).
One-Way flights
| 12 Sep | Iberia | direct | |
| 15 Sep | Air Serbia | ||
| 01 Sep | Air Serbia | ||
| 01 Sep | Iberia | direct | |
| 15 Sep | Iberia | direct | |
| 23 Sep | KLM | ||
| 17 Sep | Air Serbia | ||
| 18 Sep | SWISS |
Also check the deals for return flights from Madrid to Ljubljana in September.
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