AirHint found the following cheapest return flights from Biarritz-bayonne (BIQ) to Porto (OPO) in December 2025 (see full year).
Return flights
| 12 Dec - 15 Dec | Transavia France | ||
| 06 Dec - 09 Dec | KLM | ||
| 02 Dec - 05 Dec | Transavia France | ||
| 30 Dec - 02 Jan | Ryanair |
Also check the deals for one-way flights from Biarritz-bayonne to Porto in December.
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