AirHint found the following cheapest return flights from Cologne (CGN) to Nis (INI) in December 2025 (see full year).
Return flights
| 20 Dec - 30 Dec | Ryanair | ||
| 30 Dec - 10 Jan | Air Serbia | ||
| 30 Dec - 10 Jan | Air Serbia | direct | |
| 27 Dec - 10 Jan | Wizz Air Malta | ||
| 27 Dec - 10 Jan | Air Serbia | direct |
Also check the deals for one-way flights from Cologne to Nis in December.
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