AirHint found the following cheapest return flights from Athens (ATH) to Billund (BLL) in December 2025 (see full year).
Return flights
| 26 Dec - 03 Jan | LOT | ||
| 26 Dec - 31 Dec | LOT | ||
| 23 Dec - 02 Jan | Air France | ||
| 27 Dec - 28 Dec | KLM |
Also check the deals for one-way flights from Athens to Billund in December.
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