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

Return flights

23 Sep - 22 Oct	Flair Airlines
19 Sep - 26 Sep	Flair Airlines
21 Sep - 05 Oct	Flair Airlines
30 Sep - 07 Oct	WestJet
26 Sep - 15 Oct	WestJet
24 Sep - 01 Oct	WestJet
30 Sep - 14 Oct	WestJet
26 Sep - 03 Oct	WestJet
30 Sep - 05 Oct	WestJet
21 Sep - 26 Sep	Flair Airlines
21 Sep - 28 Sep	Flair Airlines
27 Sep - 04 Oct	WestJet
29 Sep - 06 Oct	WestJet
18 Sep - 25 Sep	Philippine Airlines
24 Sep - 28 Sep	WestJet
18 Sep - 22 Sep	Philippine Airlines
22 Sep - 29 Sep	WestJet
23 Sep - 30 Sep	WestJet
21 Sep - 27 Sep	Flair Airlines
23 Sep - 28 Sep	Cathay Pacific

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 $1104

Return flights