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

Return flights

17 Sep - 22 Oct	Flair Airlines
23 Sep - 22 Oct	WestJet
19 Sep - 14 Oct	Flair Airlines
26 Sep - 15 Oct	WestJet
17 Sep - 24 Sep	Flair Airlines
23 Sep - 01 Oct	Flair Airlines
21 Sep - 28 Oct	Flair Airlines
19 Sep - 26 Sep	Flair Airlines
17 Sep - 26 Sep	Flair Airlines
18 Sep - 22 Sep	Flair Airlines
21 Sep - 28 Sep	Flair Airlines
17 Sep - 25 Sep	Flair Airlines
23 Sep - 30 Sep	WestJet
21 Sep - 26 Sep	Flair Airlines
18 Sep - 25 Sep	Flair Airlines
23 Sep - 28 Sep	Porter Airlines (Canada) Ltd
26 Sep - 04 Oct	WestJet
26 Sep - 26 Oct	WestJet
21 Sep - 13 Oct	United
21 Sep - 12 Oct	United

Also check the deals for one-way flights from Toronto to Sydney 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 Toronto to Sydney in September from 837€

Return flights