AirHint found the following cheapest return flights from Raleigh-durham (RDU) to Brussels (BRU) in December 2025 (see full year).
Return flights
| 15 Dec - 10 Jan | Frontier Airlines | ||
| 16 Dec - 10 Jan | Frontier Airlines | ||
| 24 Dec - 31 Dec | Lufthansa | ||
| 14 Dec - 03 Jan | Frontier Airlines | ||
| 28 Dec - 04 Jan | Icelandair |
Also check the deals for one-way flights from Raleigh-durham to Brussels in December.
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