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

Return flights

25 Sep - 16 Oct	Air France
29 Sep - 08 Oct	SWISS
25 Sep - 02 Oct	Air France
30 Sep - 12 Oct	Air France
24 Sep - 01 Oct	Air France
22 Sep - 02 Oct	Air France
23 Sep - 03 Oct	Air France
27 Sep - 08 Oct	Iberia
19 Sep - 30 Sep	Air France
23 Sep - 08 Oct	KLM
26 Sep - 14 Oct	Lufthansa
22 Sep - 27 Sep	Air China
03 Sep - 16 Sep	Air France
17 Sep - 24 Sep	Air France
03 Sep - 17 Sep	Air France
07 Sep - 19 Sep	Air France
07 Sep - 18 Sep	Air France
12 Sep - 22 Sep	United
21 Sep - 30 Sep	KLM
08 Sep - 16 Sep	KLM

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 830€

Return flights