AirHint found the following cheapest one-way flights from Bilbao (BIO) to Porto (OPO) in December 2025 (see full year).

One-Way flights

09 Dec	Vueling Airlines	direct
16 Dec	Vueling Airlines	direct
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27 Dec	Vueling Airlines	direct

Also check the deals for return flights from Bilbao to Porto in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest one-way flights from Bilbao to Porto in December from 19€

One-Way flights