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

Return flights

12 Aug - 26 Sep	Pegasus Airlines
07 Aug - 14 Aug	Pegasus Airlines
08 Aug - 15 Aug	Pegasus Airlines
13 Aug - 20 Aug	Pegasus Airlines
28 Aug - 03 Sep	AJet
25 Aug - 31 Aug	Pegasus Airlines
28 Aug - 18 Sep	Pegasus Airlines
11 Aug - 18 Aug	Pegasus Airlines
30 Aug - 06 Sep	Pegasus Airlines
27 Aug - 31 Aug	Pegasus Airlines
11 Aug - 20 Aug	Pegasus Airlines
07 Aug - 11 Aug	Pegasus Airlines
05 Aug - 08 Aug	Pegasus Airlines
22 Aug - 29 Aug	Pegasus Airlines
29 Aug - 19 Sep	AJet

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 269€

Return flights