AirHint found the following cheapest return flights from Porto (OPO) to Istanbul (SAW) in August 2026 (see full year).

Return flights

15 Aug - 23 Aug	TAP
14 Aug - 22 Aug	Iberia
16 Aug - 23 Aug	TAP
29 Aug - 05 Sep	easyJet
14 Aug - 25 Aug	Ryanair
24 Aug - 27 Aug	easyJet
03 Aug - 07 Aug	Air Europa
09 Aug - 16 Aug	SunExpress
06 Aug - 09 Aug	Air Europa
03 Aug - 14 Aug	Air Europa
17 Aug - 27 Aug	easyJet

Also check the deals for one-way flights from Porto to Istanbul 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 Porto to Istanbul in August from $348

Return flights