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

Return flights

02 Sep - 07 Sep	WestJet
03 Sep - 10 Sep	WestJet
08 Sep - 15 Sep	Philippine Airlines
10 Sep - 17 Sep	Philippine Airlines
09 Sep - 16 Sep	WestJet
02 Sep - 16 Sep	WestJet
03 Sep - 16 Sep	Philippine Airlines
17 Sep - 08 Oct	Philippine Airlines
23 Sep - 14 Oct	Philippine Airlines
23 Sep - 21 Oct	Philippine Airlines
10 Sep - 24 Sep	Qantas
24 Sep - 15 Oct	Alaska Airlines
09 Sep - 23 Sep	Air New Zealand
16 Sep - 07 Oct	Air New Zealand
11 Sep - 02 Oct	Philippine Airlines
02 Sep - 21 Sep	Air New Zealand
03 Sep - 01 Oct	Air New Zealand
13 Sep - 05 Oct	Air Canada
03 Sep - 03 Oct	Air New Zealand
17 Sep - 01 Oct	Qantas

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 $717

Return flights