AirHint found the following cheapest return flights from Duesseldorf (DUS) to Ljubljana (LJU) in September 2026 (see full year).
Return flights
| 05 Sep - 13 Sep | Air Serbia | ||
| 18 Sep - 21 Sep | Lufthansa | ||
| 17 Sep - 20 Sep | Lufthansa | ||
| 12 Sep - 19 Sep | Lufthansa | ||
| 01 Sep - 09 Sep | Lufthansa | ||
| 15 Sep - 18 Sep | LOT | ||
| 16 Sep - 20 Sep | Ryanair |
Also check the deals for one-way flights from Duesseldorf to Ljubljana in September.
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