AirHint found the following cheapest one-way flights from Southampton (SOU) to Belgrade (BEG) in December 2025 (see full year).
One-Way flights
| 29 Dec | easyJet | ||
| 14 Dec | easyJet | ||
| 26 Dec | easyJet | ||
| 28 Dec | Aer Lingus | ||
| 27 Dec | KLM |
Also check the deals for return flights from Southampton to Belgrade in December.
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