Cheapest one-way flights from Ontario to Sydney in October from $499

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

One-Way flights

21 Oct Alaska Airlines
25 Oct Alaska Airlines
22 Oct China Airlines
20 Oct China Airlines
01 Oct Alaska Airlines
16 Oct Alaska Airlines
26 Oct Alaska Airlines
30 Oct Alaska Airlines
23 Oct Alaska Airlines
18 Oct China Airlines

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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