AirHint found the following cheapest return flights from Ontario (ONT) to Sydney (SYD) in June 2026 (see full year).
Return flights
| 01 Jun - 15 Jun | Alaska Airlines | ||
| 18 Jun - 25 Jun | Alaska Airlines | ||
| 15 Jun - 03 Jul | Alaska Airlines | ||
| 12 Jun - 21 Jun | China Airlines | ||
| 14 Jun - 30 Jun | 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.
Find us on social media