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

Return flights

01 Dec - 10 Dec	Etihad Airways
01 Dec - 19 Dec	Etihad Airways
01 Dec - 17 Dec	Asiana Airlines
02 Dec - 02 Jan	Turkish Airlines
24 Dec - 29 Jan	Turkish Airlines
24 Dec - 31 Dec	China Southern
19 Dec - 03 Jan	China Southern
05 Dec - 03 Jan	Asiana Airlines
22 Dec - 31 Dec	Air China
11 Dec - 07 Jan	China Southern
15 Dec - 22 Dec	China Southern
16 Dec - 16 Jan	AirAsia X
19 Dec - 21 Jan	Turkish Airlines
22 Dec - 07 Jan	China Southern
06 Dec - 02 Jan	China Southern
26 Dec - 09 Jan	Air China
13 Dec - 30 Dec	Thai Airways
17 Dec - 20 Dec	Asiana Airlines
12 Dec - 28 Dec	Thai Airways
20 Dec - 27 Dec	Thai Airways

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

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 December from $1194

Return flights