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

Return flights

29 Sep - 02 Oct	Spirit Airlines
24 Sep - 30 Sep	Lufthansa
21 Sep - 27 Sep	Frontier Airlines
19 Sep - 24 Sep	British Airways
22 Sep - 29 Sep	British Airways
29 Sep - 06 Oct	British Airways
24 Sep - 22 Oct	British Airways
26 Sep - 18 Oct	British Airways
22 Sep - 08 Oct	British Airways
18 Sep - 11 Oct	Frontier Airlines
20 Sep - 11 Oct	Spirit Airlines
23 Sep - 18 Oct	Frontier Airlines
25 Sep - 29 Sep	British Airways

Also check the deals for one-way flights from New York to Istanbul 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 Istanbul in September from 598€

Return flights