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$507+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 January 21, 2026.

This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/26:00 am
ONT
-
MEL
1 stop28h 00m
American Airlines
Mon 2/94:05 pm
MEL
-
ONT
1 stop25h 43m
American Airlines
Deal found 1/20$975
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:37 pm
ONT
-
BNE
1 stop18h 53m
United Airlines
Fri 2/2011:40 am
BNE
-
ONT
1 stop18h 58m
United Airlines
Deal found 1/21$985
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:00 am
ONT
-
BNE
2 stops31h 30m
United Airlines
Fri 3/1310:40 am
BNE
-
ONT
2 stops28h 56m
United Airlines
Deal found 1/20$989
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:15 am
ONT
-
BNE
2 stops32h 15m
United Airlines
Sat 3/1410:40 am
BNE
-
ONT
1 stop23h 58m
United Airlines
Deal found 1/21$990
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:10 am
ONT
-
BNE
1 stop31h 20m
United Airlines
Thu 2/2611:40 am
BNE
-
ONT
2 stops52h 19m
United Airlines
Deal found 1/20$1,003
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/91:24 pm
ONT
-
BNE
2 stops24h 06m
United Airlines
Mon 2/2311:40 am
BNE
-
ONT
2 stops43h 03m
United Airlines
Deal found 1/21$1,004
This SmartFares deal was found by Cheapflights users on 1/21. 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 1/288:13 am
ONT
-
SYD
1 stop40h 32m
Multiple Airlines
Thu 2/129:40 pm
SYD
-
ONT
1 stop19h 35m
Multiple Airlines
Deal found 1/21$1,022
This Gurufare deal was found by Cheapflights users on 1/21. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/211:53 pm
ONT
-
BNE
1 stop23h 37m
Multiple Airlines
Tue 2/1711:40 am
BNE
-
ONT
1 stop16h 18m
Multiple Airlines
Deal found 1/21$1,035
This SmartFares deal was found by Cheapflights users on 1/20. 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 7/47:50 am
ONT
-
SYD
1 stop18h 00m
Multiple Airlines
Tue 7/78:45 pm
SYD
-
ONT
1 stop18h 35m
Multiple Airlines
Deal found 1/20$1,046
This Kissandfly.com deal was found by Cheapflights users on 1/21. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/296:39 pm
ONT
-
BNE
1 stop18h 51m
Lufthansa
Wed 2/1111:40 am
BNE
-
ONT
1 stop24h 03m
Lufthansa
Deal found 1/21$1,050
This Trip.com deal was found by Cheapflights users on 1/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/228:13 am
ONT
-
SYD
1 stop40h 32m
Hawaiian Airlines
Thu 2/59:40 pm
SYD
-
ONT
1 stop19h 48m
Hawaiian Airlines
Deal found 1/21$1,052
This Alaska Airlines deal was found by Cheapflights users on 1/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:50 am
ONT
-
SYD
1 stop18h 00m
Multiple Airlines
Tue 8/118:45 pm
SYD
-
ONT
1 stop18h 35m
Multiple Airlines
Deal found 1/21$1,063

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 January 21, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$975
(American Airlines)

One-way from

$507
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,025
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 ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 21, 2026.
Use the filters below to find and compare flights from Ontario to Australia that are best for you.

Fly from

Ontario

Fly to

Australia

Route

Depart

Return

Price

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Fri 2/13

6:37 pm-7:30 am

1 stop18h 53m

Brisbane

Fri 2/20

11:40 am-12:38 pm

1 stop18h 58m

$985

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Thu 2/19

6:37 pm-7:30 am

1 stop18h 53m

Brisbane

Thu 3/5

11:40 am-12:18 pm

1 stop18h 38m

$985

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Sun 3/8

6:37 pm-6:30 am

1 stop18h 53m

Brisbane

Sun 3/22

10:40 am-12:18 pm

1 stop18h 38m

$985

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Tue 3/10

1:40 pm-6:30 am

1 stop23h 50m

Brisbane

Tue 3/31

10:30 am-9:56 am

1 stop16h 26m

$985

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Wed 2/25

6:37 pm-7:30 am

1 stop18h 53m

Brisbane

Wed 3/18

10:40 am-12:18 pm

1 stop18h 38m

$985

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Wed 2/25

1:50 pm-7:30 am

1 stop23h 40m

Brisbane

Fri 3/27

10:40 am-5:41 pm

1 stop24h 01m

$985

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Fri 3/6

6:00 am-7:30 am

2 stops31h 30m

Brisbane

Fri 3/13

10:40 am-10:36 pm

2 stops28h 56m

$989

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Sat 3/7

5:15 am-7:30 am

2 stops32h 15m

Brisbane

Sat 3/14

10:40 am-5:38 pm

1 stop23h 58m

$990

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Thu 2/19

6:10 am-7:30 am

1 stop31h 20m

Brisbane

Thu 2/26

11:40 am-9:59 pm

2 stops52h 19m

$1,003

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 7/2

7:50 am-6:50 pm

1 stop18h 00m

Sydney Kingsford Smith

Tue 7/28

8:45 pm-10:20 pm

1 stop18h 35m

$1,063

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 60 results
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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

What is the cheapest month to book a flight from Ontario to Australia?

Currently, August is the cheapest month in which you can book a flight from Ontario to Australia (average of $377). Flying from Ontario to Australia in December is currently the most expensive (average of $792). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 $985, United Airlines can have you in Australia from Ontario in 18h 53m. There are 7207 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.

  • What is the cheapest month to book a flight from Ontario to Australia?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Australia (average of $377). Flying from Ontario to Australia in December is currently the most expensive (average of $792). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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