AirHint found the following cheapest return flights from Billund (BLL) to Vienna (VIE) in December 2025 (see full year).
Return flights
| 30 Dec - 06 Jan | KLM | ||
| 31 Dec - 01 Jan | Wizz Air Malta | ||
| 29 Dec - 05 Jan | Lufthansa | ||
| 26 Dec - 01 Jan | Wizz Air Malta | ||
| 31 Dec - 04 Jan | Air France |
Also check the deals for one-way flights from Billund to Vienna in December.
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