AirHint found the following cheapest return flights from New York (JFK) to Santiago (STI) in September 2025 (see full year).

Return flights

11 Sep - 22 Sep	jetBlue	direct
11 Sep - 14 Sep	Frontier Airlines
07 Sep - 27 Sep	Delta	direct
11 Sep - 14 Sep	Delta	direct
12 Sep - 30 Sep	Delta	direct
13 Sep - 21 Sep	Delta	direct
16 Sep - 26 Sep	Delta	direct
15 Sep - 25 Sep	Delta	direct
11 Sep - 23 Sep	Delta	direct
18 Sep - 27 Sep	Delta	direct
25 Sep - 25 Oct	Delta	direct
26 Sep - 05 Oct	Delta	direct
30 Sep - 06 Oct	Delta	direct
13 Sep - 12 Oct	Delta	direct
13 Sep - 04 Oct	Delta	direct
27 Sep - 01 Oct	Delta	direct

Also check the deals for one-way flights from New York to Santiago 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 Santiago in September from 336€

Return flights