Cheapest return flights from Istanbul to Porto in September from $242

Best time to book flights for Istanbul (IST) to Porto (OPO) flights at AirHint

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

Return flights

26 Sep - 30 Sep Pegasus Airlines
15 Sep - 30 Sep Vueling Airlines
19 Sep - 30 Sep Vueling Airlines
26 Sep - 13 Oct Vueling Airlines
20 Sep - 30 Sep Vueling Airlines
28 Sep - 30 Sep Vueling Airlines
28 Sep - 13 Oct Vueling Airlines
10 Sep - 30 Sep Vueling Airlines
15 Sep - 22 Sep Vueling Airlines
19 Sep - 22 Sep Vueling Airlines
20 Sep - 22 Sep Vueling Airlines
10 Sep - 13 Sep Vueling Airlines

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

Skyscanner

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.

Book a cheap hotel in Porto

Cheap car rent in Porto