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

Return flights

24 Sep - 29 Sep	IndiGo
24 Sep - 30 Sep	IndiGo
24 Sep - 01 Oct	IndiGo
24 Sep - 08 Oct	IndiGo
22 Sep - 30 Sep	IndiGo
29 Sep - 04 Oct	IndiGo
22 Sep - 29 Sep	IndiGo
22 Sep - 03 Oct	IndiGo
26 Sep - 28 Sep	IndiGo
26 Sep - 12 Oct	IndiGo
22 Sep - 04 Oct	IndiGo
22 Sep - 05 Oct	IndiGo
27 Sep - 12 Oct	IndiGo
23 Sep - 30 Sep	Scoot
23 Sep - 27 Sep	Scoot
30 Sep - 04 Oct	AirAsia
25 Sep - 01 Oct	AirAsia
19 Sep - 26 Sep	Air India
21 Sep - 29 Sep	Gulf Air
22 Sep - 26 Sep	Gulf Air

Also check the deals for one-way flights from Singapore 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 Singapore to Istanbul in September from $182

Return flights