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

Return flights

23 Sep - 25 Sep	Scoot
23 Sep - 25 Oct	Scoot
16 Sep - 23 Sep	Scoot
18 Sep - 16 Oct	Scoot
28 Sep - 02 Oct	Air Canada
28 Sep - 13 Oct	Air Canada
26 Sep - 13 Oct	Air Canada
25 Sep - 14 Oct	Hainan Airlines
25 Sep - 12 Oct	Hainan Airlines
25 Sep - 13 Oct	Hainan Airlines
23 Sep - 13 Oct	Air Canada
14 Sep - 15 Sep	AirAsia X
17 Sep - 24 Sep	Singapore Airlines
20 Sep - 28 Sep	Scoot
26 Sep - 14 Oct	Scoot
18 Sep - 25 Sep	Jetstar

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 924€

Return flights