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

Return flights

12 Sep - 28 Sep	Iberia
10 Sep - 17 Sep	Ethiopian Airlines
16 Sep - 23 Sep	Iberia
15 Sep - 23 Sep	Iberia
08 Sep - 15 Sep	ITA Airways
21 Sep - 29 Sep	British Airways
05 Sep - 25 Sep	Turkish Airlines
29 Sep - 07 Oct	SKY express
21 Sep - 18 Oct	Iberia
06 Sep - 11 Sep	ITA Airways
11 Sep - 19 Sep	ITA Airways
19 Sep - 04 Oct	Wizz Air Malta
22 Sep - 24 Sep	Wizz Air Malta
20 Sep - 19 Oct	Aegean Airlines
05 Sep - 03 Oct	SKY express

Also check the deals for one-way flights from Athens 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 Athens to Sao Paulo in September from $743

Return flights