AirHint found the following cheapest one-way flights from Ontario (ONT) to Sydney (SYD) in December 2025 (see full year).
One-Way flights
| 06 Dec | Alaska Airlines | ||
| 02 Dec | China Airlines | ||
| 09 Dec | China Airlines | ||
| 24 Dec | Japan Airlines | ||
| 08 Dec | Japan Airlines | ||
| 20 Dec | China Airlines | ||
| 29 Dec | Japan Airlines | ||
| 11 Dec | Japan Airlines | ||
| 15 Dec | Japan Airlines |
Also check the deals for return flights from Ontario to Sydney in December.
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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