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

Return flights

19 Aug - 21 Sep	China Eastern
20 Aug - 27 Aug	China Eastern
25 Aug - 03 Sep	China Eastern
23 Aug - 28 Sep	Sichuan Airlines
17 Aug - 10 Sep	China Eastern
24 Aug - 28 Sep	Jetstar
20 Aug - 24 Aug	AirAsia X
26 Aug - 01 Sep	IndiGo
26 Aug - 10 Sep	IndiGo
16 Aug - 29 Aug	VietJet Air
28 Aug - 06 Sep	IndiGo
26 Aug - 23 Sep	IndiGo
27 Aug - 21 Sep	IndiGo
19 Aug - 27 Aug	Etihad Airways
21 Aug - 31 Aug	IndiGo
19 Aug - 23 Aug	ANA
21 Aug - 29 Aug	IndiGo
19 Aug - 29 Aug	IndiGo
25 Aug - 27 Aug	Etihad Airways
16 Aug - 27 Aug	IndiGo

Also check the deals for one-way flights from Sydney to Istanbul 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 Sydney to Istanbul in August from 736€

Return flights