AirHint found the following cheapest return flights from Istanbul (IST) to Sao Paulo (GRU) in September 2026 (see full year).

Return flights

12 Sep - 27 Sep	Air France
29 Sep - 08 Oct	British Airways
14 Sep - 20 Sep	KLM
01 Sep - 14 Sep	KLM
15 Sep - 19 Sep	Air Europa
01 Sep - 07 Sep	Lufthansa
01 Sep - 14 Sep	Turkish Airlines	direct
15 Sep - 19 Sep	Turkish Airlines	direct
14 Sep - 20 Sep	Turkish Airlines	direct
01 Sep - 07 Sep	Turkish Airlines	direct

Also check the deals for one-way flights from Istanbul to Sao Paulo 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 Istanbul to Sao Paulo in September from 789€

Return flights