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

Return flights

15 Jul - 22 Jul	Air Europa
02 Jul - 13 Jul	easyJet
01 Jul - 07 Jul	Ryanair
01 Jul - 10 Jul	TAP
05 Jul - 09 Jul	Air Serbia
08 Jul - 17 Jul	Ryanair
02 Jul - 05 Jul	easyJet
13 Jul - 20 Jul	Vueling Airlines
19 Jul - 26 Jul	Air Serbia
11 Jul - 18 Jul	Lufthansa
26 Jul - 02 Aug	Air Serbia
28 Jul - 04 Aug	Ryanair
16 Jul - 04 Aug	Vueling Airlines
20 Jul - 04 Aug	Vueling Airlines
28 Jul - 14 Aug	Ryanair
19 Jul - 04 Aug	Vueling Airlines
31 Jul - 07 Aug	Air Europa
20 Jul - 07 Aug	Vueling Airlines
19 Jul - 07 Aug	Vueling Airlines
28 Jul - 13 Aug	Vueling Airlines

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 $304

Return flights