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

Return flights

25 Aug - 28 Aug	AJet
22 Aug - 29 Aug	AZAL
23 Aug - 09 Sep	IndiGo
30 Aug - 18 Sep	IndiGo
17 Aug - 27 Aug	IndiGo
19 Aug - 26 Aug	IndiGo
20 Aug - 24 Aug	IndiGo
12 Aug - 27 Aug	IndiGo
18 Aug - 23 Aug	IndiGo
26 Aug - 30 Aug	IndiGo
21 Aug - 28 Aug	IndiGo
20 Aug - 28 Aug	IndiGo
29 Aug - 05 Sep	IndiGo
25 Aug - 03 Sep	IndiGo
26 Aug - 03 Sep	IndiGo
19 Aug - 02 Sep	IndiGo
26 Aug - 01 Sep	IndiGo
26 Aug - 02 Sep	IndiGo
28 Aug - 01 Sep	IndiGo
12 Aug - 02 Sep	IndiGo

Also check the deals for one-way flights from Istanbul to Singapore in August.

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 Istanbul to Singapore in August from $512

Return flights