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

One-Way flights

11 Dec	Vueling Airlines	direct
09 Dec	Vueling Airlines	direct
30 Dec	Vueling Airlines	direct
25 Dec	Vueling Airlines	direct
06 Dec	Vueling Airlines	direct
27 Dec	Vueling Airlines	direct
04 Dec	Vueling Airlines	direct
01 Dec	Vueling Airlines
02 Dec	Vueling Airlines	direct
28 Dec	Volotea	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 $23

One-Way flights