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

Return flights

31 Aug - 08 Sep	Etihad Airways
27 Aug - 07 Sep	IndiGo
24 Aug - 09 Sep	IndiGo
20 Aug - 01 Sep	IndiGo
31 Aug - 07 Sep	Etihad Airways
19 Aug - 04 Sep	IndiGo
31 Aug - 03 Sep	Etihad Airways
28 Aug - 02 Sep	IndiGo
26 Aug - 06 Sep	Gulf Air
26 Aug - 01 Sep	IndiGo
19 Aug - 26 Aug	IndiGo
21 Aug - 27 Aug	IndiGo
23 Aug - 27 Aug	IndiGo
19 Aug - 31 Aug	IndiGo
25 Aug - 28 Aug	IndiGo
19 Aug - 27 Aug	IndiGo
18 Aug - 28 Aug	IndiGo
25 Aug - 31 Aug	IndiGo
25 Aug - 29 Aug	IndiGo
20 Aug - 26 Aug	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 420€

Return flights