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

Return flights

10 Dec - 27 Dec	Sky Airline
04 Dec - 14 Dec	LATAM Airlines Group
04 Dec - 21 Dec	Arajet
10 Dec - 15 Dec	Avianca
27 Dec - 03 Jan	Sky Airline
22 Dec - 03 Jan	Sky Airline
20 Dec - 03 Jan	Sky Airline
05 Dec - 03 Jan	Avianca
25 Dec - 10 Jan	Avianca
26 Dec - 04 Jan	LATAM Airlines Group
27 Dec - 04 Jan	LATAM Airlines Group
25 Dec - 01 Jan	LATAM Airlines Group
23 Dec - 30 Dec	Avianca

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 625€

Return flights