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$538+ 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 12/19. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Nov 20 — Nov 271
Thu 11/20
Thu 11/27
1 adult, Economy
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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 October 21, 2025.

This United Airlines deal was found by Cheapflights users on 10/18. 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 12/251:00 pmMEL - ONT
1 stop40h 01mUnited Airlines
Fri 1/96:00 amONT - MEL
2 stops57h 00mUnited Airlines
Deal found 10/18$869
This Hawaiian Airlines deal was found by Cheapflights users on 10/18. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/69:40 pmSYD - ONT
1 stop38h 34mHawaiian Airlines
Mon 12/298:00 amONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 10/18$897
This Trip.com deal was found by Cheapflights users on 10/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/69:40 pmSYD - ONT
1 stop38h 34mHawaiian Airlines
Wed 11/199:47 amONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 10/20$906
This Alaska Airlines deal was found by Cheapflights users on 10/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/259:40 pmSYD - ONT
1 stop37h 34mAlaska Airlines
Sun 11/99:47 amONT - SYD
1 stop38h 58mAlaska Airlines
Deal found 10/20$918
This Jettzy deal was found by Cheapflights users on 10/19. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/182:15 pmBNE - ONT
2 stops44h 59mMultiple Airlines
Mon 12/298:00 amONT - BNE
2 stops44h 25mMultiple Airlines
Deal found 10/19$940
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/131:00 pmMEL - ONT
1 stop18h 37mUnited Airlines
Mon 11/246:38 pmONT - MEL
1 stop20h 22mUnited Airlines
Deal found 10/19$951
This United Airlines deal was found by Cheapflights users on 10/21. 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.
Thu 11/61:00 pmMEL - ONT
1 stop23h 34mUnited Airlines
Mon 11/101:29 pmONT - MEL
2 stops49h 31mUnited Airlines
Deal found 10/21$952
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/312:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Sun 11/166:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Deal found 10/19$956
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/512:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Tue 11/186:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Deal found 10/19$957
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/311:40 amBNE - ONT
1 stop18h 57mUnited Airlines
Sun 11/166:38 pmONT - BNE
1 stop18h 52mUnited Airlines
Deal found 10/19$975
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/1811:40 amBNE - ONT
1 stop23h 54mUnited Airlines
Mon 12/296:39 pmONT - BNE
1 stop18h 51mUnited Airlines
Deal found 10/19$977
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/141:00 pmMEL - ONT
1 stop18h 37mUnited Airlines
Sun 11/308:38 pmONT - MEL
1 stop18h 22mUnited Airlines
Deal found 10/20$999

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 October 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$869
(United Airlines)

One-way from

$538
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$788
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. 11% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 21, 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

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 12/25

1:00 pm-12:38 pm

2 stops42h 38m

Ontario

Fri 1/9

6:00 am-10:00 am

2 stops57h 00m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Mon 1/12

1:00 pm-12:14 pm

1 stop18h 14m

Ontario

Tue 2/10

6:00 am-10:00 am

1 stop33h 00m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 1/23

1:00 pm-12:14 pm

1 stop18h 14m

Ontario

Sat 2/7

6:32 pm-10:00 am

1 stop20h 28m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 1/24

1:00 pm-12:14 pm

1 stop18h 14m

Ontario

Sat 2/7

6:32 pm-10:00 am

1 stop20h 28m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Tue 3/17

12:00 pm-12:17 pm

1 stop18h 17m

Ontario

Tue 4/28

1:00 pm-8:15 am

2 stops26h 15m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 3/14

12:00 pm-12:17 pm

1 stop18h 17m

Ontario

Tue 3/31

1:00 pm-9:15 am

2 stops26h 15m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Tue 1/13

1:00 pm-12:14 pm

1 stop18h 14m

Ontario

Mon 2/9

1:53 pm-10:00 am

1 stop25h 07m

$869

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Wed 3/4

1:00 pm-12:38 pm

1 stop18h 38m

Ontario

Wed 3/25

7:15 pm-9:00 am

1 stop19h 45m

$869

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 11/18

9:40 pm-5:14 pm

1 stop38h 34m

Ontario

Tue 11/25

7:50 am-7:45 pm

1 stop40h 55m

$918

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 11/13

1:00 pm-8:44 pm

2 stops26h 44m

Ontario

Mon 11/24

6:38 pm-10:00 am

1 stop20h 22m

$951

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

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, January is the cheapest month in which you can book a flight from Australia to Ontario (average of $453). Flying from Australia to Ontario in July is currently the most expensive (average of $640). 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 38h 34m. Fly via United Airlines or Alaska 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 cheapest airlines to fly from Australia to Ontario one-way?

    One-way options have recently been found by users for as low as $538 on United Airlines. Other airlines that offer cheap prices include Alaska Airlines from $693 and China Airlines from $780 one-way.

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

    The most popular flight routes from Australia to Ontario are Melbourne - Ontario, Sydney Kingsford Smith - 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, January is the cheapest month in which you can book a flight from Australia to Ontario (average of $453). Flying from Australia to Ontario in July is currently the most expensive (average of $640). 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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