AirHint found the following cheapest return flights from Chicago (ORD) to Buenos Aires (EZE) in January 2026 (see full year).

Return flights

24 Jan - 08 Feb	Arajet
28 Jan - 04 Feb	Arajet
18 Jan - 23 Jan	Spirit Airlines
21 Jan - 26 Jan	Arajet
30 Jan - 06 Feb	Spirit Airlines
04 Jan - 26 Jan	Spirit Airlines
30 Jan - 28 Feb	Spirit Airlines
31 Jan - 28 Feb	Spirit Airlines
18 Jan - 25 Jan	Frontier Airlines
29 Jan - 28 Feb	Frontier Airlines
27 Jan - 16 Feb	Frontier Airlines
14 Jan - 21 Jan	Arajet
31 Jan - 07 Feb	Frontier Airlines
20 Jan - 31 Jan	Spirit Airlines
14 Jan - 17 Jan	Arajet
11 Jan - 18 Jan	Spirit Airlines
20 Jan - 26 Jan	Avianca
09 Jan - 16 Jan	Viva

Also check the deals for one-way flights from Chicago to Buenos Aires 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 Chicago to Buenos Aires in January from $627

Return flights