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

Return flights

04 Dec - 09 Dec	Frontier Airlines
01 Dec - 07 Dec	Spirit Airlines
10 Dec - 14 Dec	Frontier Airlines
04 Dec - 07 Jan	Frontier Airlines
13 Dec - 17 Jan	Frontier Airlines
13 Dec - 08 Jan	Frontier Airlines
09 Dec - 08 Jan	Frontier Airlines
18 Dec - 06 Jan	Frontier Airlines
21 Dec - 01 Jan	LATAM Airlines Group
18 Dec - 05 Jan	Frontier Airlines
28 Dec - 02 Jan	Spirit Airlines
15 Dec - 10 Jan	LATAM Airlines Group
20 Dec - 03 Jan	Frontier Airlines
10 Dec - 14 Dec	Delta	direct

Also check the deals for one-way flights from Atlanta 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.

Book a cheap hotel in Sao Paulo

Cheap car rent in Sao Paulo

Cheapest return flights from Atlanta to Sao Paulo in December from 503€

Return flights