Cheapest one-way flights from Ontario to Sydney in October from $638

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 October 2025 (see full year).

One-Way flights

23 Oct Alaska Airlines
06 Oct China Airlines
13 Oct China Airlines
25 Oct China Airlines
24 Oct China Airlines
04 Oct China Airlines
29 Oct Japan Airlines
10 Oct China Airlines
09 Oct Qatar Airways
12 Oct Qatar Airways

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

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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