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

Return flights

01 Jul - 05 Jul	Wizz Air Malta
01 Jul - 10 Jul	Wizz Air Malta
02 Jul - 08 Jul	Ryanair
06 Jul - 12 Jul	Ryanair
09 Jul - 12 Jul	easyJet
10 Jul - 14 Jul	easyJet
09 Jul - 16 Jul	KLM
13 Jul - 20 Jul	easyJet
16 Jul - 29 Jul	Air Serbia
28 Jul - 04 Aug	Lufthansa
29 Jul - 04 Aug	Lufthansa
13 Jul - 17 Jul	Lufthansa
23 Jul - 05 Aug	Air Serbia
26 Jul - 03 Aug	Air Serbia
31 Jul - 07 Aug	easyJet
28 Jul - 18 Aug	Air Europa
16 Jul - 03 Aug	Vueling Airlines
15 Jul - 03 Aug	Vueling Airlines
16 Jul - 06 Aug	Vueling Airlines
16 Jul - 05 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 227€

Return flights