AirHint found the following cheapest return flights from Rotterdam (RTM) to Copenhagen (CPH) in December 2025 (see full year).
Return flights
| 30 Dec - 31 Dec | transavia | ||
| 26 Dec - 29 Dec | transavia | ||
| 30 Dec - 06 Jan | Pegasus Airlines | ||
| 28 Dec - 29 Dec | transavia | ||
| 27 Dec - 30 Dec | transavia | ||
| 29 Dec - 02 Jan | transavia |
Also check the deals for one-way flights from Rotterdam to Copenhagen in December.
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