AirHint found the following cheapest one-way flights from Porto (OPO) to Istanbul (IST) in August 2026 (see full year).

One-Way flights

14 Aug	Aegean Airlines
12 Aug	TAP
16 Aug	TAP
05 Aug	Aegean Airlines
03 Aug	Air Europa
15 Aug	Air Europa
17 Aug	Air Europa
12 Aug	Turkish Airlines	direct
15 Aug	Turkish Airlines	direct
17 Aug	Turkish Airlines	direct

Also check the deals for return 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 one-way flights from Porto to Istanbul in August from 111€

One-Way flights