Cheapest return flights from Ontario to Sydney in December from $1233

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

Return flights

03 Dec - 19 Dec Hawaiian Airlines
10 Dec - 20 Dec Alaska Airlines
27 Dec - 28 Jan China Airlines
27 Dec - 30 Jan China Airlines
28 Dec - 28 Jan China Airlines
28 Dec - 27 Jan China Airlines
26 Dec - 28 Jan China Airlines
28 Dec - 30 Jan China Airlines
26 Dec - 07 Jan China Airlines
25 Dec - 07 Jan China Airlines
27 Dec - 31 Dec China Airlines
18 Dec - 09 Jan China Airlines
20 Dec - 06 Jan China Airlines
19 Dec - 30 Dec China Airlines
07 Dec - 21 Dec Qatar Airways
15 Dec - 22 Dec Qatar Airways

Also check the deals for one-way 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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