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

One-Way flights

05 Aug	Vueling Airlines
27 Aug	Air Europa
05 Aug	Vueling Airlines	direct
13 Aug	Air Europa
06 Aug	Air Europa
11 Aug	Air Europa
26 Aug	Vueling Airlines
03 Aug	Vueling Airlines	direct
20 Aug	Air Europa
18 Aug	Air Europa

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

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 August from 44€

One-Way flights