Cheapest return flights from Bilbao to Porto in September from $56

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

Return flights

28 Sep - 02 Oct Volotea direct
14 Sep - 02 Oct Volotea direct
25 Sep - 02 Oct Volotea direct
28 Sep - 03 Oct Volotea direct
14 Sep - 03 Oct Volotea direct
25 Sep - 03 Oct Volotea direct
27 Sep - 02 Oct Vueling Airlines direct
27 Sep - 03 Oct Vueling Airlines direct
18 Sep - 02 Oct Volotea direct
30 Sep - 02 Oct Vueling Airlines direct
14 Sep - 16 Sep Volotea direct
14 Sep - 25 Sep Volotea direct
07 Sep - 16 Sep Volotea direct
18 Sep - 25 Sep Volotea direct
07 Sep - 25 Sep Volotea direct
14 Sep - 17 Sep Volotea
11 Sep - 16 Sep Volotea direct
04 Sep - 16 Sep Volotea direct
09 Sep - 16 Sep Vueling Airlines direct
11 Sep - 25 Sep Volotea direct

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