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

One-Way flights

12 Aug	Vueling Airlines	direct
26 Aug	Vueling Airlines	direct
30 Aug	Air Europa
31 Aug	Vueling Airlines	direct
17 Aug	Air Europa
10 Aug	Air Europa
17 Aug	Vueling Airlines	direct
16 Aug	Air Europa
19 Aug	Air Europa
13 Aug	Air Europa

Also check the deals for return flights from Bilbao to Porto 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 Bilbao to Porto in August from $33

One-Way flights