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$576+ Cheap flights from Ontario (ONT) to Australia

ONT — SYD
Dec 10 — Dec 171
Thu 12/10
Thu 12/17
1 adult, Economy
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Cheap flight deals from Ontario to Australia

Cheapest flights from Ontario to Australia

Tue 11/101:35 pm -
1 stop24h 45m
Tue 11/1711:50 am -
1 stop22h 43m
Deal found 11/10$1,154
Sun 11/84:17 pm -
1 stop22h 03m
Mon 11/2311:50 am -
1 stop19h 39m
Deal found 11/6$1,156
Mon 12/76:40 pm -
1 stop19h 40m
Wed 12/2311:50 am -
1 stop19h 08m
Deal found 11/5$1,173
Sun 11/226:37 pm -
1 stop19h 43m
Wed 11/2511:50 am -
1 stop19h 39m
Deal found 11/10$1,176
Tue 11/104:17 pm -
1 stop22h 03m
Tue 11/1711:50 am -
1 stop19h 39m
Deal found 11/9$1,177

Find flight deals from Ontario to Australia

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,152
(oojo)

One-way from

$576
(Delta)

Popular in

December

Cheapest in

May

Average price

$977
Provider with most accurate pricing for Los Angeles-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Sydney Kingsford Smith flights.
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From Ontario to Australia
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One-way flight from Ontario to Australia
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Highest demand for flights based on searches. 9% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Ontario to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sun 4/25

5:00 am-6:55 am

2 stops32h 55m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 4/20

5:00 am-6:55 am

2 stops32h 55m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 4/21

1:00 pm-6:55 am

2 stops24h 55m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600
Quickest round-trip

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Mon 12/7

6:40 pm-9:20 am

1 stop19h 40m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$600

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Thu 12/24

1:05 pm-6:20 am

1 stop22h 15m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$660

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Sat 4/24

1:33 pm-6:55 am

1 stop24h 22m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$660

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Fri 2/12

1:45 pm-9:20 am

2 stops24h 35m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$943

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Tue 12/8

8:03 am-7:45 pm

1 stop40h 42m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$966

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 12/23

6:27 pm-6:20 am

1 stop40h 53m

Sydney Kingsford Smith

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$984

OntarioSydney

ONT Ontario - SYD Sydney Kingsford Smith

ONTSYD

Ontario

Wed 4/28

4:03 pm-6:55 am

1 stop21h 52m

Sydney Kingsford Smith

Tue 5/11

10:20 am-9:57 am

1 stop16h 37m

$1,177

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Ontario with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Ontario to Australia

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Australia

Get a feel of what it's like to fly with United Airlines from Ontario to Australia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.3
Good
10,471 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.7

Overall

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.3
Good
10,471 reviews
United Airlines
7.3
Good
10,471 reviews

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.7

Overall

7.3

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

  • What airport do you fly from for flights from Ontario to Australia?

    If you book a flight to Australia from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Ontario to Australia?

    For as low as $1,177, United Airlines can have you in Australia from Ontario in 21h 52m. There are 7534 mi between Ontario and Australia.

  • What are the most popular routes from Ontario to Australia?

    While some choose either Ontario - Melbourne or Ontario - Brisbane, Ontario - Sydney Kingsford Smith is the most popular route from Ontario to Australia.

  • Can I find deals for flights from Ontario to Australia that include hotel bookings?

    Yes. In addition to deals on Ontario to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Australia.

  • Can I find deals for business class flights from Ontario to Australia?

    Yes. Cheapflights offers flight deals from Ontario to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Ontario to Australia

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,049Average$1,111FlexibilityNo cancel feeOn-time69%

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