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$410+ Cheap flights from Australia to Ontario (ONT)

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Australia to Ontario

Cheapest flights from Australia to Ontario
Explore the most affordable flight options available from Australia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/3. 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 12/1111:40 amBNE - ONT
1 stop23h 57mUnited Airlines
Mon 3/96:37 pmONT - BNE
1 stop18h 53mUnited Airlines
Deal found 12/3$790
This United Airlines deal was found by Cheapflights users on 12/4. 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.
Wed 12/2411:40 amBNE - ONT
1 stop24h 30mUnited Airlines
Sun 1/186:00 amONT - BNE
2 stops55h 30mUnited Airlines
Deal found 12/4$794
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Sun 12/141:00 pmMEL - ONT
1 stop28h 49mUnited Airlines
Wed 12/316:00 amONT - MEL
1 stop33h 00mUnited Airlines
Deal found 12/3$1,017
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/191:00 pmMEL - ONT
2 stops51h 07mUnited Airlines
Tue 1/201:24 pmONT - MEL
2 stops49h 36mUnited Airlines
Deal found 12/4$1,219
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/241:00 pmMEL - ONT
2 stops42h 38mUnited Airlines
Thu 1/226:39 pmONT - MEL
2 stops43h 56mUnited Airlines
Deal found 12/3$1,239
This United Airlines deal was found by Cheapflights users on 12/4. 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.
Wed 12/2411:40 amBNE - ONT
2 stops27h 27mUnited Airlines
Wed 1/145:05 amONT - BNE
2 stops32h 25mUnited Airlines
Deal found 12/4$1,251
This United Airlines deal was found by Cheapflights users on 12/4. 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.
Wed 12/2411:40 amBNE - ONT
1 stop16h 21mUnited Airlines
Thu 1/155:05 amONT - BNE
2 stops32h 25mUnited Airlines
Deal found 12/4$1,300
This United Airlines deal was found by Cheapflights users on 12/3. 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.
Wed 12/241:00 pmMEL - ONT
2 stops42h 38mUnited Airlines
Fri 1/96:00 amONT - MEL
2 stops57h 00mUnited Airlines
Deal found 12/3$1,333
This SmartFares deal was found by Cheapflights users on 12/4. 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 12/99:40 pmSYD - ONT
1 stop17h 43mAlaska Airlines
Fri 1/168:13 amONT - SYD
1 stop40h 32mAlaska Airlines
Deal found 12/4$1,415
This SmartFares deal was found by Cheapflights users on 12/3. 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 12/249:40 pmSYD - ONT
1 stop19h 28mHawaiian Airlines
Wed 1/148:13 amONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 12/3$1,421
This SmartFares deal was found by Cheapflights users on 12/4. 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 12/99:40 pmSYD - ONT
1 stop17h 43mHawaiian Airlines
Wed 12/248:00 amONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 12/4$1,422
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/2211:40 amBNE - ONT
1 stop16h 21mUnited Airlines
Wed 1/146:00 amONT - BNE
1 stop31h 30mUnited Airlines
Deal found 12/2$1,454

Find flight deals from Australia to Ontario

Keep the following information in mind while searching for Australia to Ontario flight deals. Data was last updated December 4, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$670
(SmartFares)

One-way from

$410
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$1,090
Provider with most accurate pricing for Sydney Kingsford Smith-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Los Angeles flights.
Search Deals
From Australia to Ontario
Search Deals
One-way flight from Australia to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Australia to Ontario 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 December 4, 2025.
Use the filters below to find and compare flights from Australia to Ontario that are best for you.

Fly from

Australia

Fly to

Ontario

Route

Depart

Return

Price

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 1/21

9:40 pm-10:28 pm

1 stop19h 48m

Ontario

Thu 1/29

8:13 am-7:45 pm

1 stop40h 32m

$694

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 5/11

10:20 am-12:20 pm

1 stop19h 00m

Ontario

Wed 5/20

6:53 pm-6:55 am

1 stop19h 02m

$747

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 1/20

11:50 am-9:59 pm

1 stop29h 09m

Ontario

Sat 1/24

6:32 pm-6:20 am

1 stop40h 48m

$747

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Wed 1/14

11:40 am-11:18 am

1 stop17h 38m

Ontario

Sun 2/1

1:24 pm-7:30 am

2 stops24h 06m

$790

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 2/6

11:40 am-11:18 am

1 stop17h 38m

Ontario

Fri 3/6

11:59 pm-7:30 am

2 stops37h 31m

$790

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 3/27

10:40 am-12:48 pm

2 stops43h 08m

Ontario

Thu 4/16

7:00 am-6:30 am

2 stops54h 30m

$790

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Sat 2/28

11:40 am-12:47 pm

1 stop19h 07m

Ontario

Thu 3/12

1:50 pm-6:30 am

2 stops23h 40m

$790

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Tue 2/17

11:40 am-12:38 pm

1 stop18h 58m

Ontario

Tue 3/24

1:50 pm-6:30 am

2 stops23h 40m

$790

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Thu 12/18

11:40 am-5:43 pm

1 stop24h 03m

Ontario

Mon 3/16

5:15 am-6:30 am

2 stops32h 15m

$790

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 3/22

9:40 pm-9:55 pm

1 stop18h 15m

Ontario

Tue 3/31

9:50 am-6:50 pm

1 stop39h 00m

$791

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 60 results
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Best time to book a flight from Australia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Australia 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 Australia to Ontario

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

Currently, February is the cheapest month in which you can book a flight from Australia to Ontario (average of $509). Flying from Australia to Ontario in August is currently the most expensive (average of $612). 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 Australia to Ontario. 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 into for flights to Ontario from Australia?

    Ontario (ONT) is the airport you will fly into if you book a flight from Australia to Ontario. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • How long is the flight from Australia to Ontario?

    There are many flights that can get you from Australia to Ontario in 19h. Fly via Alaska Airlines or United Airlines to get the fastest option. The distance from Australia to Ontario is about 7534 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The most popular flight routes from Australia to Ontario are Sydney Kingsford Smith - Ontario, Melbourne - Ontario and Brisbane - Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Australia to Ontario 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 Australia to Ontario?

    Currently, February is the cheapest month in which you can book a flight from Australia to Ontario (average of $509). Flying from Australia to Ontario in August is currently the most expensive (average of $612). 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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