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

Return flights

05 Dec - 23 Dec	Air New Zealand
05 Dec - 12 Dec	Air New Zealand
01 Dec - 19 Dec	Air Canada
08 Dec - 27 Dec	Air Canada
31 Dec - 17 Jan	Air Canada
05 Dec - 27 Dec	United
23 Dec - 13 Jan	Air Canada
10 Dec - 01 Jan	Air Canada
06 Dec - 05 Jan	Air Canada
30 Dec - 08 Jan	Air New Zealand
09 Dec - 06 Jan	United
15 Dec - 08 Jan	Asiana Airlines
20 Dec - 09 Jan	Philippine Airlines
17 Dec - 07 Jan	Alaska Airlines
15 Dec - 13 Jan	Asiana Airlines
16 Dec - 31 Dec	Air Canada
17 Dec - 28 Dec	United
19 Dec - 31 Dec	Air Canada

Also check the deals for one-way flights from Toronto 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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Cheapest return flights from Toronto to Sydney in December from $1325

Return flights