AirHint found the following cheapest one-way flights from Porto (OPO) to Bilbao (BIO) in December 2026 (see full year).
One-Way flights
| 26 Dec | Iberia | ||
| 27 Dec | TAP | ||
| 24 Dec | Volotea | direct | |
| 31 Dec | Volotea | direct | |
| 27 Dec | Volotea | direct |
Also check the deals for return flights from Porto to Bilbao in December.
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