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

One-Way flights

03 Oct	Vueling Airlines	direct
14 Oct	Vueling Airlines	direct
04 Oct	Vueling Airlines	direct
07 Oct	Vueling Airlines
21 Oct	Vueling Airlines
15 Oct	Vueling Airlines
10 Oct	Vueling Airlines
25 Oct	Vueling Airlines	direct
08 Oct	Vueling Airlines
20 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 18€

One-Way flights