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

Return flights

28 Sep - 06 Oct	KLM
30 Sep - 13 Oct	KLM
30 Sep - 22 Oct	KLM
26 Sep - 07 Oct	KLM
25 Sep - 02 Oct	KLM
04 Sep - 10 Sep	TAP
25 Sep - 01 Oct	KLM
18 Sep - 01 Oct	KLM
23 Sep - 08 Oct	KLM
26 Sep - 03 Oct	KLM
14 Sep - 24 Sep	KLM
24 Sep - 04 Oct	KLM
11 Sep - 18 Sep	KLM
11 Sep - 20 Sep	KLM
18 Sep - 29 Sep	KLM
15 Sep - 25 Sep	KLM
19 Sep - 26 Sep	KLM
13 Sep - 24 Sep	KLM
10 Sep - 24 Sep	KLM
01 Sep - 24 Sep	Emirates

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 809€

Return flights