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

Return flights

03 Dec - 26 Jan	Air Canada
01 Dec - 31 Dec	United
05 Dec - 28 Dec	United
01 Dec - 08 Jan	United
23 Dec - 13 Jan	Air Canada
07 Dec - 27 Dec	United
09 Dec - 08 Jan	United
08 Dec - 27 Dec	United
06 Dec - 06 Jan	United
31 Dec - 18 Jan	Air Canada
29 Dec - 16 Jan	Air Canada
06 Dec - 27 Dec	United
25 Dec - 25 Jan	Air Canada
25 Dec - 17 Jan	Air Canada
25 Dec - 15 Jan	Air Canada
14 Dec - 28 Dec	Turkish Airlines
15 Dec - 22 Dec	United
20 Dec - 28 Dec	Air Canada
16 Dec - 30 Dec	Air Canada
20 Dec - 27 Dec	United

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 1237€

Return flights