Cheapest return flights from Chicago to Buenos Aires in December from $915

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

Return flights

03 Dec - 10 Dec LATAM Airlines Group
08 Dec - 08 Jan Frontier Airlines
29 Dec - 05 Jan Frontier Airlines
07 Dec - 09 Jan Frontier Airlines
10 Dec - 30 Dec LATAM Airlines Group
05 Dec - 19 Dec LATAM Airlines Group
25 Dec - 01 Jan Frontier Airlines
19 Dec - 03 Jan Frontier Airlines
11 Dec - 06 Jan LATAM Airlines Group
04 Dec - 08 Jan LATAM Airlines Group
10 Dec - 01 Jan LATAM Airlines Group
15 Dec - 04 Jan LATAM Airlines Group
27 Dec - 09 Jan LATAM Airlines Group

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

Powered by

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 Buenos Aires

Cheap car rent in Buenos Aires

Feel free to contact us with any feedback or request another flight research.