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

Return flights

04 Jun - 11 Jun	Alaska Airlines
22 Jun - 29 Jun	China Airlines
24 Jun - 16 Jul	China Airlines
19 Jun - 16 Jul	China Airlines
15 Jun - 22 Jun	China Airlines
08 Jun - 15 Jun	China Airlines
03 Jun - 10 Jun	China Airlines
01 Jun - 08 Jun	China Airlines
10 Jun - 17 Jun	China Airlines
12 Jun - 19 Jun	China Airlines
24 Jun - 01 Jul	China Airlines
29 Jun - 06 Jul	China Airlines
19 Jun - 26 Jun	China Airlines
05 Jun - 12 Jun	China Airlines
26 Jun - 03 Jul	China Airlines
30 Jun - 07 Jul	Qatar Airways
25 Jun - 02 Jul	Qatar Airways
27 Jun - 04 Jul	Qatar Airways
28 Jun - 05 Jul	Qatar Airways

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

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 June from $1392

Return flights