Cheapest return flights from Chicago to Buenos Aires in December from $793

AirHint found the following cheapest return flights from Chicago (MDW) to Buenos Aires (EZE) in December 2025 (see full year).

Return flights

06 Dec - 14 Dec Frontier Airlines
06 Dec - 21 Dec LATAM Airlines Group
06 Dec - 28 Dec LATAM Airlines Group
13 Dec - 28 Dec Delta
06 Dec - 10 Jan Frontier Airlines
16 Dec - 29 Dec LATAM Airlines Group
13 Dec - 18 Dec Frontier Airlines
06 Dec - 11 Jan Frontier Airlines
14 Dec - 20 Dec Delta
20 Dec - 28 Dec LATAM Airlines Group
31 Dec - 10 Jan LATAM Airlines Group
14 Dec - 31 Dec LATAM Airlines Group
06 Dec - 04 Jan Frontier Airlines
18 Dec - 22 Dec Delta
11 Dec - 06 Jan Frontier Airlines
27 Dec - 10 Jan LATAM Airlines Group
13 Dec - 09 Jan LATAM Airlines Group
27 Dec - 04 Jan Frontier Airlines
06 Dec - 03 Jan Frontier Airlines
20 Dec - 05 Jan Frontier Airlines

Also check the deals for one-way flights from Chicago to Buenos Aires in December.

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