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

Return flights

05 Sep - 16 Sep	Ryanair
16 Sep - 19 Sep	Vueling Airlines
08 Sep - 15 Sep	Vueling Airlines
05 Sep - 24 Sep	Ryanair
05 Sep - 15 Sep	Ryanair
05 Sep - 15 Sep	Ryanair	direct
05 Sep - 23 Sep	Ryanair
24 Sep - 01 Oct	Ryanair
17 Sep - 24 Sep	Ryanair
16 Sep - 23 Sep	Vueling Airlines
15 Sep - 19 Sep	Ryanair
29 Sep - 15 Oct	Ryanair
16 Sep - 01 Oct	Vueling Airlines
16 Sep - 04 Oct	Vueling Airlines
16 Sep - 03 Oct	Vueling Airlines
16 Sep - 02 Oct	Vueling Airlines
22 Sep - 02 Oct	Ryanair
29 Sep - 10 Oct	Ryanair	direct
23 Sep - 10 Oct	Vueling Airlines
29 Sep - 13 Oct	Ryanair	direct

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

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 return flights from Bologna to Porto in September from 114€

Return flights