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

Return flights

22 Sep - 27 Sep	Eurowings
25 Sep - 29 Sep	Wizz Air UK
22 Sep - 25 Sep	Eurowings
20 Sep - 22 Sep	Eurowings
27 Sep - 02 Oct	Wizz Air UK
22 Sep - 26 Sep	Eurowings
29 Sep - 05 Oct	Eurowings
23 Sep - 30 Sep	Eurowings
26 Sep - 29 Sep	Wizz Air UK
26 Sep - 03 Oct	Wizz Air UK
20 Sep - 24 Sep	Wizz Air UK
25 Sep - 05 Oct	Wizz Air UK
21 Sep - 24 Sep	Eurowings
20 Sep - 23 Sep	Wizz Air UK
30 Sep - 05 Oct	Wizz Air UK
28 Sep - 03 Oct	Croatia Airlines
22 Sep - 25 Oct	Eurowings
28 Sep - 05 Oct	Croatia Airlines

Also check the deals for one-way flights from Split 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 Split to Istanbul in September from $209

Return flights