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

Return flights

16 Sep - 23 Sep	Spirit Airlines
28 Sep - 05 Oct	Spirit Airlines
15 Sep - 23 Sep	Spirit Airlines
10 Sep - 17 Sep	Spirit Airlines
08 Sep - 19 Sep	Spirit Airlines
08 Sep - 16 Sep	Spirit Airlines
13 Sep - 20 Sep	Spirit Airlines
10 Sep - 20 Sep	Spirit Airlines
18 Sep - 25 Sep	Spirit Airlines
23 Sep - 28 Sep	Spirit Airlines
22 Sep - 30 Sep	Spirit Airlines
18 Sep - 04 Oct	Spirit Airlines
25 Sep - 02 Oct	Spirit Airlines
20 Sep - 04 Oct	Spirit Airlines
09 Sep - 19 Oct	Spirit Airlines
10 Sep - 13 Oct	Spirit Airlines
30 Sep - 22 Oct	Aeromexico
24 Sep - 06 Oct	Aeromexico

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 $770

Return flights