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

Return flights

04 Dec - 13 Dec	Arajet
05 Dec - 12 Dec	Sky Airline
02 Dec - 09 Dec	Arajet
01 Dec - 12 Dec	Sky Airline
02 Dec - 06 Dec	Sky Airline
05 Dec - 14 Dec	Sky Airline
15 Dec - 30 Dec	Sky Airline
15 Dec - 07 Jan	Sky Airline
12 Dec - 26 Dec	Sky Airline
12 Dec - 19 Dec	Sky Airline
12 Dec - 15 Jan	Sky Airline
11 Dec - 26 Dec	Sky Airline
12 Dec - 10 Jan	Sky Airline
12 Dec - 11 Jan	Sky Airline
12 Dec - 03 Jan	Sky Airline
12 Dec - 02 Jan	Sky Airline
03 Dec - 03 Jan	Sky Airline
05 Dec - 04 Jan	Sky Airline
22 Dec - 07 Jan	Sky Airline
21 Dec - 07 Jan	Sky Airline

Also check the deals for one-way flights from Miami to Buenos Aires 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.

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Cheapest return flights from Miami to Buenos Aires in December from $635

Return flights