AirHint found the following cheapest one-way flights from Athens (ATH) to Bilbao (BIO) in December 2025 (see full year).
One-Way flights
| 28 Dec | Iberia | ||
| 25 Dec | Iberia | ||
| 27 Dec | Iberia | ||
| 22 Dec | Iberia | ||
| 31 Dec | KLM | ||
| 30 Dec | Turkish Airlines | ||
| 23 Dec | Air France |
Also check the deals for return flights from Athens to Bilbao in December.
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