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

Return flights

25 Sep - 15 Oct	Icelandair
18 Sep - 04 Oct	Icelandair
22 Sep - 04 Oct	Icelandair
25 Sep - 04 Oct	Icelandair
06 Sep - 13 Sep	Icelandair
17 Sep - 03 Oct	Air Europa
17 Sep - 23 Sep	Air Europa
29 Sep - 04 Oct	Icelandair
15 Sep - 04 Oct	Icelandair
17 Sep - 25 Sep	Air Europa
17 Sep - 09 Oct	Air Europa
17 Sep - 04 Oct	Air Europa
24 Sep - 04 Oct	Air Europa
24 Sep - 30 Sep	Air Europa
15 Sep - 25 Sep	KLM
15 Sep - 30 Sep	KLM
12 Sep - 23 Sep	Air Europa
10 Sep - 18 Sep	Air Europa
17 Sep - 21 Sep	KLM
16 Sep - 30 Sep	KLM

Also check the deals for one-way flights from Istanbul to New York 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 Istanbul to New York in September from 355€

Return flights