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

Return flights

29 Jul - 05 Aug	Alaska Airlines
07 Jul - 27 Jul	Lufthansa
03 Jul - 29 Jul	Lufthansa
01 Jul - 04 Jul	Lufthansa
02 Jul - 12 Jul	Hawaiian Airlines
04 Jul - 07 Jul	Lufthansa
06 Jul - 12 Jul	China Airlines
23 Jul - 19 Aug	Hawaiian Airlines
30 Jul - 06 Aug	Alaska Airlines
02 Jul - 05 Jul	Lufthansa
28 Jul - 21 Aug	China Airlines
28 Jul - 11 Aug	China Airlines
28 Jul - 13 Aug	China Airlines
22 Jul - 22 Aug	China Airlines
30 Jul - 13 Aug	China Airlines
07 Jul - 20 Jul	China Airlines
25 Jul - 10 Aug	Alaska Airlines
19 Jul - 01 Aug	Lufthansa
05 Jul - 23 Jul	China Airlines
15 Jul - 21 Jul	Lufthansa

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

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 July from $1442

Return flights