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

Return flights

18 Sep - 30 Sep	Avianca
10 Sep - 17 Sep	Avianca
17 Sep - 29 Sep	Avianca
17 Sep - 28 Sep	Avianca
08 Sep - 16 Sep	Avianca
17 Sep - 24 Sep	Avianca
06 Sep - 19 Sep	Avianca
20 Sep - 26 Sep	Avianca
12 Sep - 22 Sep	Avianca
09 Sep - 19 Oct	Avianca
10 Sep - 24 Sep	Avianca
16 Sep - 06 Oct	Avianca
25 Sep - 05 Oct	Avianca
19 Sep - 05 Oct	Avianca
25 Sep - 05 Oct	American Airlines	direct
19 Sep - 05 Oct	American Airlines	direct

Also check the deals for one-way flights from New York 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 New York to Buenos Aires in September from $719

Return flights