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

Return flights

15 Dec - 17 Dec	Copa
17 Dec - 24 Dec	United
16 Dec - 21 Dec	Delta
14 Dec - 23 Dec	Delta
15 Dec - 22 Dec	United
15 Dec - 18 Dec	Delta
16 Dec - 18 Dec	Delta
14 Dec - 18 Dec	Delta
17 Dec - 23 Dec	United
16 Dec - 23 Dec	Delta
27 Dec - 28 Jan	Avianca
27 Dec - 28 Jan	American Airlines	direct
26 Dec - 22 Jan	Aerolíneas Argentinas
29 Dec - 23 Jan	Arajet
26 Dec - 22 Jan	American Airlines	direct
29 Dec - 23 Jan	American Airlines	direct
17 Dec - 31 Jan	Copa
26 Dec - 11 Jan	Aerolíneas Argentinas
23 Dec - 01 Jan	Aerolíneas Argentinas
24 Dec - 01 Jan	Aerolíneas Argentinas

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 $613

Return flights