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

Return flights

21 Aug - 25 Aug	TAP
31 Aug - 07 Sep	easyJet
26 Aug - 02 Sep	easyJet
01 Aug - 15 Aug	Vueling Airlines
03 Aug - 10 Aug	Vueling Airlines
30 Aug - 05 Sep	easyJet
14 Aug - 28 Aug	Ryanair
20 Aug - 27 Aug	easyJet
18 Aug - 28 Aug	easyJet
01 Aug - 12 Aug	Vueling Airlines
16 Aug - 23 Aug	Air Europa
03 Aug - 11 Aug	Air Europa
21 Aug - 28 Aug	easyJet
01 Aug - 01 Sep	easyJet

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

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 August from 269€

Return flights