AirHint found the following cheapest return flights from Sao Paulo (CGH) to Istanbul (IST) in September 2025 (see full year).

Return flights

23 Sep - 07 Oct	Air Europa
20 Sep - 07 Oct	Air Europa
10 Sep - 10 Oct	KLM
13 Sep - 28 Sep	Air Europa
08 Sep - 18 Sep	Air Europa
08 Sep - 22 Sep	Air Europa
12 Sep - 28 Sep	Air Europa
01 Sep - 30 Sep	Air Europa
05 Sep - 14 Sep	Air Europa

Also check the deals for one-way flights from Sao Paulo to Istanbul in September.

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 Sao Paulo to Istanbul in September from 1065€

Return flights