AirHint found the following cheapest return flights from Cologne (CGN) to Kathmandu (KTM) in December 2025 (see full year).
Return flights
| 06 Dec - 17 Dec | Pegasus Airlines | ||
| 12 Dec - 12 Jan | Ryanair | ||
| 12 Dec - 11 Jan | Ryanair | ||
| 27 Dec - 10 Jan | Ryanair | ||
| 03 Dec - 10 Dec | Turkish Airlines |
Also check the deals for one-way flights from Cologne to Kathmandu in December.
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