AirHint found the following cheapest return flights from Ontario (ONT) to Sydney (SYD) in January 2026 (see full year).

Return flights

10 Jan - 25 Jan	Alaska Airlines
18 Jan - 21 Feb	Alaska Airlines
09 Jan - 16 Jan	Alaska Airlines
26 Jan - 26 Feb	Air New Zealand
25 Jan - 26 Feb	Air New Zealand
11 Jan - 18 Jan	Alaska Airlines
27 Jan - 03 Feb	Alaska Airlines
27 Jan - 10 Feb	Alaska Airlines
21 Jan - 31 Jan	Alaska Airlines
22 Jan - 25 Jan	Alaska Airlines
26 Jan - 27 Feb	Hawaiian Airlines
26 Jan - 28 Feb	Hawaiian Airlines
13 Jan - 21 Jan	Hawaiian Airlines
07 Jan - 17 Jan	Hawaiian Airlines
14 Jan - 21 Jan	Hawaiian Airlines
10 Jan - 30 Jan	Hawaiian Airlines
18 Jan - 21 Jan	Hawaiian Airlines
19 Jan - 01 Feb	Hawaiian Airlines
20 Jan - 01 Feb	Hawaiian Airlines
26 Jan - 08 Feb	Hawaiian Airlines

Also check the deals for one-way flights from Ontario to Sydney in January.

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 Ontario to Sydney in January from $1053

Return flights