Cheapest one-way flights from Ontario to Sydney in September from $617

Best time to book flights for Ontario (ONT) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest one-way flights from Ontario (ONT) to Sydney (SYD) in September 2025 (see full year).

One-Way flights

13 Sep Alaska Airlines
25 Sep WestJet
22 Sep Hawaiian Airlines
23 Sep WestJet
14 Sep Philippine Airlines
08 Sep China Airlines
24 Sep China Airlines
02 Sep China Airlines
16 Sep China Airlines
29 Sep Japan Airlines

Also check the deals for return flights from Ontario to Sydney in September.

Skyscanner

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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