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

Return flights

01 Dec - 05 Dec	Air Canada
02 Dec - 27 Dec	Air Canada
24 Dec - 13 Jan	Air Canada
27 Dec - 17 Jan	WestJet
08 Dec - 15 Dec	Air New Zealand
26 Dec - 13 Jan	Air Canada
25 Dec - 13 Jan	Air Canada
26 Dec - 16 Jan	WestJet
06 Dec - 31 Dec	United
24 Dec - 11 Jan	Qantas
25 Dec - 12 Jan	Air Canada
26 Dec - 11 Jan	Air Canada
25 Dec - 11 Jan	Air Canada
16 Dec - 31 Dec	United
18 Dec - 10 Jan	WestJet
19 Dec - 20 Dec	China Southern

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 $1466

Return flights