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

Return flights

01 Sep - 11 Sep	Ethiopian Airlines
14 Sep - 21 Sep	Avianca
06 Sep - 14 Sep	LATAM Airlines Group
16 Sep - 23 Sep	KLM
22 Sep - 28 Sep	GOL Linhas Aéreas
22 Sep - 15 Oct	KLM
19 Sep - 06 Oct	ITA Airways
23 Sep - 15 Oct	Turkish Airlines
29 Sep - 09 Oct	Air France
15 Sep - 26 Sep	KLM
29 Sep - 10 Oct	Air France
16 Sep - 26 Sep	KLM
08 Sep - 14 Sep	LATAM Airlines Group
03 Sep - 15 Sep	United
25 Sep - 02 Oct	Air France
26 Sep - 13 Oct	Royal Air Maroc
08 Sep - 19 Sep	KLM
29 Sep - 06 Oct	British Airways
22 Sep - 01 Oct	SWISS
15 Sep - 02 Oct	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 869€

Return flights