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

Return flights

12 Dec - 21 Dec	Turkish Airlines
08 Dec - 21 Dec	Turkish Airlines
18 Dec - 12 Jan	Turkish Airlines
05 Dec - 14 Dec	ITA Airways
21 Dec - 12 Jan	Turkish Airlines
19 Dec - 12 Jan	Turkish Airlines
18 Dec - 08 Jan	Turkish Airlines
18 Dec - 07 Jan	Turkish Airlines
20 Dec - 12 Jan	Turkish Airlines
19 Dec - 02 Jan	Turkish Airlines
24 Dec - 31 Dec	ITA Airways
18 Dec - 09 Jan	Turkish Airlines
24 Dec - 04 Jan	Turkish Airlines
01 Dec - 10 Dec	Delta
24 Dec - 03 Jan	Turkish Airlines
06 Dec - 20 Dec	SWISS

Also check the deals for one-way flights from Athens to Sao Paulo in December.

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 December from $677

Return flights