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

Return flights

15 Sep - 25 Sep	KLM
12 Sep - 25 Sep	KLM
01 Sep - 01 Oct	KLM
18 Sep - 24 Sep	KLM
12 Sep - 24 Sep	KLM
16 Sep - 24 Sep	KLM
24 Sep - 30 Sep	KLM
23 Sep - 30 Sep	KLM
19 Sep - 30 Sep	KLM
22 Sep - 30 Sep	KLM
10 Sep - 25 Sep	KLM
27 Sep - 31 Oct	KLM
29 Sep - 06 Oct	KLM
18 Sep - 15 Oct	British Airways
18 Sep - 09 Oct	KLM

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 697€

Return flights