AirHint found the following cheapest return flights from Atlanta (ATL) to Sao Paulo (GRU) in August 2025 (see full year).

Return flights

21 Aug - 25 Aug	Frontier Airlines
21 Aug - 24 Aug	Frontier Airlines
29 Aug - 01 Sep	Spirit Airlines
10 Aug - 12 Aug	Spirit Airlines
02 Aug - 15 Aug	Spirit Airlines
10 Aug - 17 Aug	Frontier Airlines
07 Aug - 14 Aug	Spirit Airlines
02 Aug - 04 Aug	Spirit Airlines
02 Aug - 09 Aug	Spirit Airlines
01 Aug - 15 Aug	Spirit Airlines
01 Aug - 02 Aug	Spirit Airlines
29 Aug - 07 Sep	Delta
22 Aug - 07 Sep	Delta
29 Aug - 01 Sep	LATAM Airlines Group	direct

Also check the deals for one-way flights from Atlanta to Sao Paulo in August.

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 Atlanta to Sao Paulo in August from $495

Return flights