AirHint found the following cheapest return flights from Fort Lauderdale (FLL) to Istanbul (IST) in September 2025 (see full year).

Return flights

08 Sep - 15 Sep	Spirit Airlines
24 Sep - 29 Sep	Spirit Airlines
03 Sep - 06 Sep	Spirit Airlines
15 Sep - 25 Sep	Delta
09 Sep - 16 Sep	Delta
30 Sep - 14 Oct	American Airlines
11 Sep - 25 Sep	Delta
08 Sep - 22 Sep	Delta
12 Sep - 26 Sep	American Airlines
22 Sep - 29 Sep	American Airlines
06 Sep - 14 Sep	American Airlines
28 Sep - 29 Oct	Delta
27 Sep - 11 Oct	Delta
15 Sep - 11 Oct	Delta
06 Sep - 05 Oct	Delta

Also check the deals for one-way flights from Fort Lauderdale 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 Fort Lauderdale to Istanbul in September from $669

Return flights