Cheapest one-way flights from Ontario to Sydney in December from $1234

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

One-Way flights

15 Dec Korean Air
29 Dec Alaska Airlines
31 Dec Alaska Airlines
25 Dec Alaska Airlines
11 Dec China Airlines
18 Dec Alaska Airlines
21 Dec Alaska Airlines
24 Dec Alaska Airlines
22 Dec Alaska Airlines
23 Dec Alaska Airlines

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

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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