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

Return flights

22 Sep - 20 Oct	GOL Linhas Aéreas
26 Sep - 06 Oct	Air Europa
29 Sep - 12 Oct	Air Europa
26 Sep - 16 Oct	Air Europa
16 Sep - 01 Oct	Air Europa
13 Sep - 20 Sep	Air Europa
12 Sep - 03 Oct	Air Europa
08 Sep - 20 Sep	GOL Linhas Aéreas
01 Sep - 11 Sep	Air Europa
02 Sep - 14 Sep	Air Europa
01 Sep - 18 Sep	Air Europa
01 Sep - 22 Sep	Air Europa
02 Sep - 07 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 $1222

Return flights