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

Return flights

20 Aug - 03 Sep	AJet
27 Aug - 03 Sep	Pegasus Airlines
30 Aug - 05 Sep	Pegasus Airlines
28 Aug - 02 Sep	Pegasus Airlines
20 Aug - 27 Aug	AJet
21 Aug - 25 Aug	AJet
20 Aug - 26 Aug	AJet
20 Aug - 25 Aug	Pegasus Airlines
25 Aug - 28 Aug	Pegasus Airlines
18 Aug - 03 Sep	Pegasus Airlines
21 Aug - 28 Aug	AJet
20 Aug - 28 Aug	Pegasus Airlines
23 Aug - 28 Aug	Pegasus Airlines
20 Aug - 30 Aug	Pegasus Airlines
24 Aug - 25 Aug	Pegasus Airlines
29 Aug - 01 Sep	Pegasus Airlines

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

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 Istanbul to Porto in August from 300€

Return flights