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

Return flights

22 Jul - 03 Aug	Transavia France
10 Jul - 22 Jul	Wizz Air Malta
10 Jul - 24 Jul	Wizz Air Malta
21 Jul - 30 Jul	Vueling Airlines
23 Jul - 03 Aug	Wizz Air Malta
24 Jul - 03 Aug	Wizz Air Malta
24 Jul - 02 Aug	Wizz Air Malta
03 Jul - 11 Jul	Ryanair
14 Jul - 24 Jul	Iberia
03 Jul - 12 Jul	Ryanair
04 Jul - 12 Jul	Iberia
19 Jul - 30 Jul	Wizz Air Malta
20 Jul - 31 Jul	Ryanair
01 Jul - 14 Jul	Eurowings
22 Jul - 02 Aug	Ryanair
25 Jul - 05 Aug	Iberia
25 Jul - 08 Aug	Iberia
25 Jul - 01 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 $308

Return flights