Cheapest return flights from Ontario to Sydney in August from $1160

Best time to book flights for Ontario (ONT) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest return flights from Ontario (ONT) to Sydney (SYD) in August 2025 (see full year).

Return flights

05 Aug - 18 Aug Alaska Airlines
16 Aug - 31 Aug Alaska Airlines
14 Aug - 21 Aug Alaska Airlines
11 Aug - 18 Aug Alaska Airlines
29 Aug - 07 Sep Alaska Airlines
01 Aug - 08 Aug Alaska Airlines
01 Aug - 11 Sep Alaska Airlines
13 Aug - 25 Aug China Airlines
25 Aug - 05 Sep China Airlines
11 Aug - 27 Aug China Airlines
18 Aug - 25 Aug China Airlines
29 Aug - 14 Sep China Airlines
29 Aug - 12 Sep China Airlines
26 Aug - 01 Sep China Airlines
14 Aug - 25 Aug Qatar Airways

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

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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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