AirHint found the following cheapest one-way flights from Porto (OPO) to Bilbao (BIO) in May 2026 (see full year).

One-Way flights

05 May	Vueling Airlines	direct
14 May	Vueling Airlines	direct
15 May	Vueling Airlines	direct
10 May	Vueling Airlines	direct
31 May	Vueling Airlines	direct
13 May	Vueling Airlines
09 May	Vueling Airlines
30 May	Air Europa
03 May	Vueling Airlines
03 May	Vueling Airlines	direct

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

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 Porto to Bilbao in May from 20€

One-Way flights