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

Return flights

02 Dec - 10 Dec	Etihad Airways
01 Dec - 10 Dec	Etihad Airways
03 Dec - 11 Dec	Asiana Airlines
07 Dec - 15 Dec	ANA
09 Dec - 17 Dec	ANA
07 Dec - 22 Dec	ANA
01 Dec - 09 Dec	Asiana Airlines
04 Dec - 12 Dec	Asiana Airlines
03 Dec - 10 Jan	Turkish Airlines
12 Dec - 20 Dec	ANA
14 Dec - 22 Dec	ANA
30 Dec - 07 Jan	China Southern
25 Dec - 29 Jan	Turkish Airlines
04 Dec - 10 Jan	Turkish Airlines
30 Dec - 06 Jan	China Southern
15 Dec - 14 Jan	China Southern
16 Dec - 14 Jan	China Southern
08 Dec - 05 Jan	China Southern
05 Dec - 10 Jan	ANA
28 Dec - 05 Jan	China Southern

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 987€

Return flights