Cheapest return flights from Porto to Bilbao in September from 61€

AirHint found the following cheapest return flights from Porto (OPO) to Bilbao (BIO) in September 2025 (see full year).

Return flights

25 Sep - 09 Oct Volotea direct
25 Sep - 27 Sep Volotea direct
25 Sep - 14 Oct Volotea direct
25 Sep - 16 Oct Volotea direct
25 Sep - 12 Oct Volotea direct
25 Sep - 05 Oct Volotea direct
25 Sep - 28 Sep Volotea direct
25 Sep - 30 Sep Volotea direct
27 Sep - 09 Oct Vueling Airlines direct
25 Sep - 29 Sep Volotea
20 Sep - 27 Sep Air Europa
27 Sep - 14 Oct Vueling Airlines direct
27 Sep - 16 Oct Vueling Airlines direct
24 Sep - 27 Sep Air Europa
20 Sep - 27 Sep Vueling Airlines direct
27 Sep - 12 Oct Vueling Airlines direct
25 Sep - 04 Oct Volotea direct
20 Sep - 24 Sep Air Europa
24 Sep - 24 Sep Air Europa
20 Sep - 23 Sep Air Europa

Also check the deals for one-way flights from Porto to Bilbao in September.

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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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