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

Return flights

28 Oct - 04 Nov	Scoot
24 Oct - 04 Nov	Etihad Airways
27 Oct - 07 Nov	AirAsia X
29 Oct - 14 Nov	Sichuan Airlines
26 Oct - 02 Nov	AirAsia X
23 Oct - 12 Nov	Etihad Airways
23 Oct - 28 Oct	Etihad Airways
31 Oct - 09 Nov	Etihad Airways
24 Oct - 14 Nov	Etihad Airways
24 Oct - 31 Oct	Etihad Airways
27 Oct - 12 Nov	Etihad Airways
27 Oct - 10 Nov	Etihad Airways
22 Oct - 30 Oct	VietJet Air
23 Oct - 31 Oct	IndiGo
22 Oct - 31 Oct	IndiGo
26 Oct - 30 Oct	IndiGo
31 Oct - 31 Oct	Emirates

Also check the deals for one-way flights from Sydney to Istanbul in October.

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 October from $810

Return flights