Cheapest return flights from Bilbao to Porto in December from $118

Best time to book flights for Bilbao (BIO) to Porto (OPO) flights at AirHint

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

Return flights

01 Dec - 04 Dec Vueling Airlines
01 Dec - 07 Dec Vueling Airlines
04 Dec - 07 Dec Vueling Airlines
21 Dec - 08 Jan Volotea
21 Dec - 28 Dec Air Europa
21 Dec - 01 Jan Volotea
04 Dec - 07 Dec Volotea direct
21 Dec - 01 Jan Volotea direct
21 Dec - 28 Dec Volotea direct

Also check the deals for one-way flights from Bilbao to Porto in December.

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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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