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

Return flights

07 Jul - 21 Jul	easyJet
08 Jul - 22 Jul	Ryanair
11 Jul - 18 Jul	easyJet
16 Jul - 23 Jul	Ryanair
09 Jul - 15 Jul	Ryanair
11 Jul - 17 Jul	easyJet
10 Jul - 18 Jul	Ryanair
10 Jul - 17 Jul	Wizz Air Malta
10 Jul - 12 Jul	Ryanair
17 Jul - 22 Jul	Ryanair
25 Jul - 21 Aug	Ryanair
28 Jul - 01 Aug	Wizz Air Malta
28 Jul - 07 Aug	Wizz Air Malta
15 Jul - 20 Aug	Ryanair
04 Jul - 08 Aug	easyJet
04 Jul - 09 Aug	easyJet
23 Jul - 03 Aug	Ryanair
26 Jul - 02 Aug	easyJet
24 Jul - 06 Aug	Vueling Airlines
25 Jul - 06 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Porto to Istanbul in July from 255€

Return flights