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

One-Way flights

30 Oct	Vueling Airlines	direct
09 Oct	Volotea	direct
23 Oct	Volotea	direct
02 Oct	Volotea	direct
18 Oct	Vueling Airlines	direct
11 Oct	Vueling Airlines	direct
14 Oct	Vueling Airlines	direct
03 Oct	Vueling Airlines	direct
21 Oct	Vueling Airlines
25 Oct	Vueling Airlines

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

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 October from 15€

One-Way flights