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Ontario

$414+ 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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Sep 8 — Sep 151
Mon 9/8
Mon 9/15
1 adult, Economy
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Cheap flight deals from Australia to Ontario

Keep the following information in mind while searching for Australia to Ontario flight deals. Data was last updated September 3, 2025.

Round-trip from

$856
(United Airlines)

One-way from

$414
(Trip.com)

Popular in

December

Cheapest in

May

Average price

$867
From Australia to Ontario
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One-way flight from Australia to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($130 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 3, 2025.

This United Airlines deal was found by Cheapflights users on 9/3. 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 9/410:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Mon 9/86:50 pmONT - SYD
1 stop19h 05mUnited Airlines
Deal found 9/3$856
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Mon 9/810:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Sun 9/216:50 pmONT - SYD
1 stop19h 05mUnited Airlines
Deal found 9/3$857
This United Airlines deal was found by Cheapflights users on 9/2. 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 9/810:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Sat 9/131:15 pmONT - SYD
2 stops48h 40mUnited Airlines
Deal found 9/2$860
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/175:20 pmSYD - ONT
1 stop21h 17mMultiple Airlines
Tue 10/2111:07 amONT - SYD
1 stop34h 33mMultiple Airlines
Deal found 9/1$861
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/1410:20 amSYD - ONT
2 stops28h 05mUnited Airlines
Sun 9/288:16 pmONT - SYD
1 stop17h 39mUnited Airlines
Deal found 9/3$882
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/510:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Tue 9/165:10 amONT - SYD
2 stops32h 45mUnited Airlines
Deal found 9/1$885
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Fri 9/1910:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Sun 9/288:16 pmONT - SYD
1 stop17h 39mUnited Airlines
Deal found 9/2$886
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Sat 9/610:55 amMEL - ONT
1 stop18h 18mUnited Airlines
Sat 9/131:15 pmONT - MEL
2 stops26h 00mUnited Airlines
Deal found 9/3$900
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/2211:55 amMEL - ONT
1 stop18h 18mUnited Airlines
Sat 11/16:38 pmONT - MEL
1 stop20h 22mUnited Airlines
Deal found 9/3$901
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/911:55 amMEL - ONT
1 stop23h 45mUnited Airlines
Sat 11/86:38 pmONT - MEL
1 stop20h 22mUnited Airlines
Deal found 9/1$903
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Tue 9/910:55 amMEL - ONT
1 stop18h 18mUnited Airlines
Tue 9/161:15 pmONT - MEL
2 stops26h 00mUnited Airlines
Deal found 9/1$904
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Sat 9/610:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Wed 9/106:50 pmONT - SYD
1 stop19h 05mUnited Airlines
Deal found 9/3$905

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 September 3, 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 9/24

10:20 am-12:13 pm

1 stop18h 53m

Ontario

Sun 9/28

6:36 pm-6:55 am

1 stop19h 19m

$856

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 9/17

10:20 am-12:13 pm

1 stop18h 53m

Ontario

Sun 9/21

6:50 pm-6:55 am

1 stop19h 05m

$856

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 9/17

10:20 am-5:29 pm

2 stops24h 09m

Ontario

Sat 9/20

1:15 pm-6:55 am

2 stops48h 40m

$859

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 9/23

10:20 am-5:37 pm

1 stop24h 17m

Ontario

Sat 9/27

1:15 pm-6:55 am

2 stops48h 40m

$860

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 9/14

10:20 am-8:43 pm

2 stops27h 23m

Ontario

Sun 9/28

5:05 am-6:55 am

2 stops32h 50m

$882

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 9/19

10:20 am-9:25 pm

2 stops28h 05m

Ontario

Sun 9/28

8:16 pm-6:55 am

1 stop17h 39m

$886

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sun 2/1

1:00 pm-12:14 pm

1 stop18h 14m

Ontario

Sat 2/28

7:15 pm-10:00 am

1 stop19h 45m

$887

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 2/7

1:00 pm-12:14 pm

1 stop18h 14m

Ontario

Sun 2/22

3:30 pm-10:00 am

1 stop23h 30m

$891

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 2/5

9:40 pm-9:55 pm

1 stop19h 15m

Ontario

Tue 2/17

9:50 am-7:45 pm

1 stop38h 55m

$893

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Mon 10/13

11:55 am-5:40 pm

1 stop23h 45m

Ontario

Wed 11/5

6:38 pm-10:00 am

1 stop20h 22m

$900

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

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, August is the cheapest month in which you can book a flight from Australia to Ontario (average of $246). Flying from Australia to Ontario in March is currently the most expensive (average of $328). 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 18h 53m. Fly via United Airlines to get the fastest option. The distance from Australia to Ontario is about 7534 mi.

  • 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, August is the cheapest month in which you can book a flight from Australia to Ontario (average of $246). Flying from Australia to Ontario in March is currently the most expensive (average of $328). 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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