AirHint found the following cheapest return flights from Cardiff (CWL) to Belgrade (BEG) in December 2025 (see full year).
Return flights
| 23 Dec - 06 Jan | Vueling Airlines | ||
| 23 Dec - 04 Jan | Vueling Airlines | ||
| 23 Dec - 03 Jan | Vueling Airlines | ||
| 22 Dec - 04 Jan | Ryanair | ||
| 24 Dec - 03 Jan | Ryanair |
Also check the deals for one-way flights from Cardiff to Belgrade in December.
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