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

Return flights

11 Sep - 18 Sep	Spirit Airlines
24 Sep - 08 Oct	Delta
24 Sep - 01 Oct	Delta
22 Sep - 01 Oct	Delta
17 Sep - 01 Oct	Delta
23 Sep - 30 Sep	Delta
22 Sep - 06 Oct	Delta
14 Sep - 05 Oct	Delta
03 Sep - 01 Oct	Delta
09 Sep - 17 Sep	Delta
06 Sep - 20 Sep	Delta
07 Sep - 21 Sep	Delta
03 Sep - 03 Oct	Delta
26 Sep - 29 Sep	Delta
01 Sep - 05 Sep	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 561€

Return flights