Cheapest return flights from Chicago to Buenos Aires in December from $1232

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

Return flights

30 Dec - 14 Jan LATAM Airlines Group
23 Dec - 05 Jan LATAM Airlines Group
31 Dec - 04 Jan LATAM Airlines Group
29 Dec - 03 Jan Frontier Airlines
24 Dec - 31 Dec LATAM Airlines Group
22 Dec - 30 Dec LATAM Airlines Group

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

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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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