AirHint found the following cheapest return flights from Sydney (SYD) to Vienna (VIE) in September 2025 (see full year).

Return flights

15 Sep - 21 Oct	Scoot Tigerair
08 Sep - 16 Oct	Scoot Tigerair
16 Sep - 23 Sep	Scoot Tigerair
15 Sep - 23 Sep	Scoot Tigerair
10 Sep - 23 Sep	Scoot Tigerair
05 Sep - 18 Sep	Scoot Tigerair
04 Sep - 18 Sep	Scoot Tigerair
03 Sep - 16 Oct	Scoot Tigerair
04 Sep - 14 Sep	Air China
02 Sep - 16 Sep	Air China
02 Sep - 19 Oct	Air China
11 Sep - 27 Sep	Scoot Tigerair
22 Sep - 07 Oct	Scoot Tigerair
04 Sep - 03 Oct	Air China
11 Sep - 03 Oct	Air China
11 Sep - 05 Oct	Air China
02 Sep - 21 Oct	Air China
11 Sep - 06 Oct	Air China
14 Sep - 20 Sep	Turkish Airlines
08 Sep - 15 Sep	Etihad Airways

Also check the deals for one-way flights from Sydney to Vienna in September.

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 Vienna in September from $789

Return flights