Cheapest one-way flights from Ontario (ONT) to Sydney (SYD), October

10 dates in October, from $ 622. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
15 Oct Alaska Airlines
28 Oct Alaska Airlines
19 Oct Alaska Airlines
24 Oct Alaska Airlines
21 Oct Alaska Airlines
16 Oct Alaska Airlines
29 Oct Alaska Airlines
26 Oct Alaska Airlines
14 Oct Alaska Airlines
25 Oct Alaska Airlines
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Deals for return flights from Ontario to Sydney in October.

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Updated Oct 13, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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