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

Return flights

01 Sep - 03 Sep	LATAM Airlines Group
05 Sep - 09 Sep	Avianca
01 Sep - 08 Sep	Copa
10 Sep - 24 Sep	Avianca
03 Sep - 07 Sep	Copa
02 Sep - 14 Sep	Avianca
09 Sep - 16 Sep	Avianca
06 Sep - 26 Sep	Avianca
08 Sep - 19 Sep	Avianca
08 Sep - 15 Sep	Avianca
18 Sep - 02 Oct	Arajet
24 Sep - 06 Oct	Copa
26 Sep - 15 Oct	GOL Linhas Aéreas
19 Sep - 04 Oct	GOL Linhas Aéreas
24 Sep - 25 Oct	Sky Airline
06 Sep - 13 Oct	Sky Airline
28 Sep - 06 Oct	LATAM Airlines Group
30 Sep - 20 Oct	Copa

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

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 September from 554€

Return flights