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

Return flights

09 Dec - 19 Jan	Arajet
08 Dec - 15 Dec	LATAM Airlines Group
05 Dec - 08 Dec	LATAM Airlines Group
18 Dec - 30 Dec	Arajet
01 Dec - 07 Dec	LATAM Airlines Group
01 Dec - 12 Dec	LATAM Airlines Group
05 Dec - 19 Dec	Sky Airline
18 Dec - 09 Jan	Arajet
23 Dec - 17 Jan	Arajet
19 Dec - 29 Dec	Sky Airline
19 Dec - 05 Jan	Sky Airline
15 Dec - 02 Jan	Sky Airline
26 Dec - 02 Jan	Sky Airline
24 Dec - 04 Jan	Arajet
22 Dec - 03 Jan	Sky Airline
18 Dec - 06 Jan	Arajet
29 Dec - 04 Jan	Sky Airline
15 Dec - 30 Dec	LATAM Airlines Group

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 $711

Return flights