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$488+ Cheap flights from Ontario (ONT) to Australia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Aug 17 — Aug 241
Mon 8/17
Mon 8/24
1 adult, Economy
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Cheap flight deals from Ontario to Australia

Cheapest flights from Ontario to Australia
Explore the most affordable flight options available from Ontario to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2026.

This Fareboom deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:00 am
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Sun 10/259:40 pm
SYD
-
ONT
1 stop17h 21m
Multiple Airlines
Deal found 7/14$956
This SmartFares deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/299:31 am
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Tue 10/208:45 pm
SYD
-
ONT
1 stop18h 37m
Multiple Airlines
Deal found 7/13$989
This SmartFares deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 8/188:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/14$990
This SmartFares deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/49:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 8/118:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/14$994
This SmartFares deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/219:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 7/288:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/13$997
This SmartFares deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/29:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/98:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/17$998
This SmartFares deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am
ONT
-
SYD
1 stop18h 45m
Multiple Airlines
Tue 11/109:40 pm
SYD
-
ONT
1 stop18h 52m
Multiple Airlines
Deal found 7/14$999
This SmartFares deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/269:31 am
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Fri 9/118:45 pm
SYD
-
ONT
1 stop18h 25m
Multiple Airlines
Deal found 7/15$1,005
This SmartFares deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:31 am
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Thu 10/299:40 pm
SYD
-
ONT
1 stop17h 21m
Multiple Airlines
Deal found 7/13$1,015
This SmartFares deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Fri 8/148:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/15$1,016
This Cheapflightsfares deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/238:45 pm
SYD
-
ONT
1 stop18h 25m
Multiple Airlines
Deal found 7/13$1,018
This SmartFares deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:31 am
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Tue 9/18:45 pm
SYD
-
ONT
1 stop18h 25m
Multiple Airlines
Deal found 7/13$1,019

Find flight deals from Ontario to Australia

Keep the following information in mind while searching for Ontario to Australia flight deals. Data was last updated July 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$956
(Fareboom)

One-way from

$488
(SmartFares)

Popular in

December

Cheapest in

February

Average price

$1,024
Provider with most accurate pricing for Los Angeles-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Sydney Kingsford Smith flights.
Search Deals
From Ontario to Australia
Search Deals
One-way flight from Ontario to Australia
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 18, 2026.
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 - SYD

ONTSYD

Ontario

Sun 8/30

7:13 pm-6:55 am

1 stop18h 42m

Sydney Kingsford Smith

Mon 9/14

10:20 am-12:12 pm

1 stop18h 52m

$1,084

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Fri 8/7

6:39 pm-6:30 am

1 stop18h 51m

Brisbane

Fri 8/21

10:30 am-12:12 pm

1 stop18h 42m

$1,089
Quickest round-trip

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Wed 12/30

6:27 pm-7:30 am

1 stop19h 03m

Brisbane

Fri 1/15

11:40 am-9:57 am

1 stop16h 17m

$1,094

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Sun 9/27

4:03 pm-6:30 am

1 stop21h 27m

Brisbane

Sun 10/11

10:30 am-10:23 am

1 stop16h 53m

$1,099

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Sat 8/29

1:18 pm-6:30 am

2 stops48h 12m

Brisbane

Sat 9/5

6:55 am-12:12 pm

2 stops22h 17m

$1,140

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 11/6

6:36 pm-9:20 am

1 stop19h 44m

Sydney Kingsford Smith

Tue 11/17

11:50 am-12:01 pm

1 stop19h 11m

$1,145

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 11/8

5:00 am-9:20 am

2 stops33h 20m

Sydney Kingsford Smith

Thu 11/12

11:50 am-5:55 pm

1 stop25h 05m

$1,149

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Thu 10/15

7:00 am-6:35 am

2 stops30h 35m

Brisbane

Sat 10/24

11:15 am-9:22 pm

2 stops27h 07m

$1,156

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Thu 10/15

4:03 pm-9:15 am

1 stop23h 12m

Melbourne

Mon 11/2

12:45 pm-12:01 pm

1 stop18h 16m

$1,161

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 8/6

9:11 am-10:35 pm

2 stops44h 54m

Adelaide

Thu 8/20

8:00 pm-10:10 pm

2 stops42h 40m

$1,200

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/17

Showing 1-10 of 60 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 $1,084, United Airlines can have you in Australia from Ontario in 18h 42m. There are 7534 mi between Ontario and Australia. This flight may include one or multiple stops.

  • 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

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