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

Return flights

20 Aug - 27 Aug	Avianca
13 Aug - 20 Aug	Avianca
21 Aug - 30 Aug	Avianca
11 Aug - 18 Aug	Avianca
11 Aug - 28 Aug	Copa
28 Aug - 03 Sep	Copa
15 Aug - 01 Sep	Copa
28 Aug - 02 Sep	Volaris
15 Aug - 19 Aug	Copa
21 Aug - 24 Aug	Copa
25 Aug - 29 Aug	Copa
08 Aug - 12 Aug	Avianca
07 Aug - 18 Aug	Avianca
29 Aug - 01 Sep	LATAM Airlines Group
28 Aug - 08 Sep	LATAM Airlines Group
29 Aug - 08 Sep	LATAM Airlines Group
29 Aug - 07 Sep	LATAM Airlines Group
29 Aug - 09 Sep	LATAM Airlines Group
29 Aug - 13 Sep	Avianca

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

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 August from 477€

Return flights