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

Return flights

08 Sep - 22 Sep	Frontier Airlines
07 Sep - 14 Sep	Spirit Airlines
15 Sep - 24 Sep	Spirit Airlines
05 Sep - 26 Sep	Spirit Airlines
11 Sep - 20 Sep	Spirit Airlines
15 Sep - 16 Sep	Spirit Airlines
03 Sep - 06 Sep	Spirit Airlines
08 Sep - 18 Sep	Delta
10 Sep - 16 Sep	Delta
09 Sep - 30 Sep	Delta
14 Sep - 05 Oct	Delta
16 Sep - 01 Oct	Delta
09 Sep - 04 Oct	jetBlue
08 Sep - 04 Oct	jetBlue
10 Sep - 04 Oct	jetBlue
14 Sep - 04 Oct	jetBlue
12 Sep - 04 Oct	jetBlue

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 $730

Return flights