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

Return flights

08 Sep - 24 Sep	Ethiopian Airlines
15 Sep - 24 Sep	Ethiopian Airlines
08 Sep - 19 Sep	Ethiopian Airlines
18 Sep - 25 Sep	TAP
05 Sep - 12 Sep	Ethiopian Airlines
05 Sep - 13 Sep	Ethiopian Airlines
21 Sep - 30 Sep	TAP
24 Sep - 30 Sep	TAP
30 Sep - 13 Oct	TAP
29 Sep - 13 Oct	TAP
26 Sep - 12 Oct	TAP
26 Sep - 05 Oct	Ethiopian Airlines
19 Sep - 06 Oct	TAP
30 Sep - 12 Oct	TAP
18 Sep - 02 Oct	TAP
12 Sep - 15 Sep	Avianca
08 Sep - 17 Sep	Arajet
24 Sep - 01 Oct	TAP
29 Sep - 15 Oct	Ethiopian Airlines
29 Sep - 08 Oct	Ethiopian Airlines

Also check the deals for one-way flights from Sao Paulo to Athens 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 Athens in September from $773

Return flights