AirHint found the following cheapest return flights from Atlanta (ATL) to Sao Paulo (GRU) in January 2026 (see full year).

Return flights

20 Jan - 26 Jan	Spirit Airlines
18 Jan - 02 Feb	Frontier Airlines
22 Jan - 06 Feb	Frontier Airlines
22 Jan - 28 Jan	Frontier Airlines
11 Jan - 20 Jan	Frontier Airlines
11 Jan - 19 Jan	Frontier Airlines
24 Jan - 26 Jan	Spirit Airlines
07 Jan - 14 Jan	Frontier Airlines
08 Jan - 13 Jan	Spirit Airlines
22 Jan - 06 Feb	LATAM Airlines Group	direct
09 Jan - 11 Jan	Frontier Airlines
26 Jan - 29 Jan	Air Canada
22 Jan - 28 Jan	LATAM Airlines Group	direct

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

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 January from $502

Return flights