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

Return flights

18 Dec - 25 Dec	Copa
23 Dec - 17 Jan	Avianca
22 Dec - 16 Jan	Frontier Airlines
27 Dec - 11 Jan	Arajet
18 Dec - 30 Dec	Copa
24 Dec - 11 Jan	Frontier Airlines
28 Dec - 11 Jan	Copa
23 Dec - 11 Jan	Frontier Airlines
18 Dec - 10 Jan	Copa
17 Dec - 10 Jan	Copa
26 Dec - 11 Jan	Frontier Airlines
18 Dec - 11 Jan	Frontier Airlines
21 Dec - 28 Dec	Spirit Airlines
22 Dec - 31 Dec	Spirit Airlines
21 Dec - 31 Dec	Frontier Airlines
20 Dec - 29 Dec	Arajet
22 Dec - 31 Dec	United	direct
21 Dec - 31 Dec	United	direct
20 Dec - 29 Dec	United	direct
18 Dec - 30 Dec	United	direct

Also check the deals for one-way flights from Chicago 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 Chicago to Sao Paulo in December from $868

Return flights