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

Return flights

16 Sep - 15 Oct	British Airways
10 Sep - 30 Sep	Turkish Airlines
16 Sep - 11 Oct	British Airways
26 Sep - 17 Oct	British Airways
15 Sep - 15 Oct	British Airways
05 Sep - 15 Sep	Ethiopian Airlines
15 Sep - 11 Oct	British Airways
15 Sep - 30 Sep	British Airways
01 Sep - 30 Sep	Turkish Airlines
13 Sep - 17 Sep	Ethiopian Airlines
29 Sep - 06 Oct	Air France
12 Sep - 15 Sep	Air France
28 Sep - 05 Oct	British Airways
11 Sep - 13 Sep	Aegean Airlines
05 Sep - 13 Sep	Iberia
14 Sep - 16 Sep	British Airways

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 640€

Return flights