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

Return flights

05 Dec - 26 Dec	China Eastern
03 Dec - 30 Dec	Asiana Airlines
31 Dec - 22 Jan	China Southern
05 Dec - 12 Dec	Asiana Airlines
29 Dec - 18 Jan	Air China
26 Dec - 03 Jan	Air China
04 Dec - 28 Dec	Turkish Airlines
04 Dec - 14 Dec	Turkish Airlines
26 Dec - 02 Jan	Air China
20 Dec - 27 Dec	Virgin Australia
17 Dec - 31 Dec	China Southern
29 Dec - 05 Jan	China Southern
08 Dec - 31 Jan	IndiGo
11 Dec - 16 Dec	Asiana Airlines
19 Dec - 31 Dec	ANA
06 Dec - 03 Jan	Turkish Airlines
30 Dec - 13 Jan	Thai Airways
17 Dec - 24 Dec	China Southern
29 Dec - 19 Jan	China Southern
29 Dec - 22 Jan	Etihad 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 917€

Return flights