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

Return flights

25 Jul - 29 Jul	Ryanair
28 Jul - 07 Aug	Ryanair
28 Jul - 01 Aug	Ryanair
23 Jul - 26 Jul	Ryanair
24 Jul - 29 Jul	Ryanair
25 Jul - 01 Aug	Ryanair
23 Jul - 25 Jul	Ryanair
31 Jul - 07 Aug	Jet2
29 Jul - 05 Aug	Ryanair
23 Jul - 03 Aug	Ryanair
29 Jul - 02 Aug	Ryanair
25 Jul - 27 Jul	Ryanair
25 Jul - 30 Jul	easyJet
22 Jul - 24 Jul	Ryanair
31 Jul - 06 Aug	Ryanair
27 Jul - 31 Jul	easyJet
22 Jul - 30 Jul	Ryanair
24 Jul - 27 Jul	TAP
26 Jul - 02 Aug	Ryanair

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

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 July from 334€

Return flights