AirHint found the following cheapest one-way flights from Bilbao (BIO) to Brussels (BRU) in December 2025 (see full year).
One-Way flights
| 30 Dec | Air Europa | ||
| 31 Dec | Iberia | ||
| 29 Dec | Air Europa | ||
| 29 Dec | Vueling Airlines | direct | |
| 31 Dec | Brussels Airlines | direct |
Also check the deals for return flights from Bilbao to Brussels in December.
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