AirHint found the following cheapest return flights from Bilbao (BIO) to Porto (OPO) in January 2026 (see full year).

Return flights

13 Jan - 31 Jan	Vueling Airlines	direct
16 Jan - 31 Jan	Vueling Airlines
16 Jan - 03 Feb	Vueling Airlines
03 Jan - 06 Jan	Vueling Airlines	direct
01 Jan - 06 Jan	Vueling Airlines	direct
13 Jan - 03 Feb	Vueling Airlines
04 Jan - 06 Jan	Vueling Airlines
04 Jan - 06 Jan	Volotea	direct

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

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 return flights from Bilbao to Porto in January from $52

Return flights