AirHint found the following cheapest one-way flights from New York (NYC) to Miami (MIA) in September 2025 (see full year).

One-Way flights

08 Sep	Frontier Airlines	direct
17 Sep	Frontier Airlines	direct
22 Sep	Frontier Airlines	direct
29 Sep	Frontier Airlines	direct
24 Sep	Frontier Airlines	direct
15 Sep	Frontier Airlines	direct
10 Sep	Frontier Airlines	direct
03 Sep	Frontier Airlines	direct
26 Sep	Frontier Airlines	direct
19 Sep	Frontier Airlines	direct

Also check the deals for return flights from New York to Miami 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 one-way flights from New York to Miami in September from $23

One-Way flights