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

Return flights

12 Dec - 19 Dec	Virgin Australia
15 Dec - 15 Jan	China Eastern
27 Dec - 27 Jan	China Eastern
06 Dec - 12 Dec	China Southern
07 Dec - 12 Dec	AirAsia X
02 Dec - 08 Dec	ANA
03 Dec - 09 Dec	Asiana Airlines
03 Dec - 11 Dec	Asiana Airlines
04 Dec - 10 Dec	China Southern
06 Dec - 15 Dec	China Southern
08 Dec - 17 Dec	China Southern
07 Dec - 10 Dec	AirAsia X
30 Dec - 05 Jan	China Southern
30 Dec - 19 Jan	AirAsia X
30 Dec - 12 Jan	AirAsia X
30 Dec - 09 Jan	AirAsia X
30 Dec - 14 Jan	AirAsia X
30 Dec - 18 Jan	AirAsia X
30 Dec - 16 Jan	AirAsia X
30 Dec - 07 Jan	AirAsia X

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 $1103

Return flights