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$427+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheap 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 2, 2025.

Round-trip from

$870
(United Airlines)

One-way from

$427
(American Airlines)

Popular in

December

Cheapest in

February

Average price

$954
From Ontario to Australia
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One-way flight from Ontario to Australia
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Highest demand for flights based on searches. 13% potential increase in price ($157 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 2, 2025.

This United Airlines deal was found by Cheapflights users on 7/1. 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 12/96:42 pmONT - SYD
1 stop19h 33mUnited Airlines
Thu 1/2212:10 pmSYD - ONT
1 stop16h 49mUnited Airlines
Deal found 7/1$870
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2810:06 amONT - SYD
2 stops28h 54mAmerican Airlines
Thu 11/135:45 pmSYD - ONT
2 stops23h 15mAmerican Airlines
Deal found 7/1$939
This United Airlines deal was found by Cheapflights users on 6/30. 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 12/16:38 pmONT - BNE
1 stop18h 52mUnited Airlines
Sun 12/1411:40 amBNE - ONT
1 stop18h 34mUnited Airlines
Deal found 6/30$1,065
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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.
Wed 10/2211:07 amONT - SYD
1 stop38h 38mAlaska Airlines
Tue 10/289:40 pmSYD - ONT
1 stop37h 34mAlaska Airlines
Deal found 6/30$1,093
This Kiwi.com deal was found by Cheapflights users on 6/30. 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.
Thu 8/149:00 amONT - SYD
1 stop36h 40mMultiple Airlines
Thu 8/213:10 pmSYD - ONT
2 stops43h 30mMultiple Airlines
Deal found 6/30$1,126
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1212:10 amONT - MEL
2 stops29h 55mMultiple Airlines
Sat 10/251:25 amMEL - ONT
2 stops34h 25mMultiple Airlines
Deal found 6/30$1,239
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1512:47 pmONT - OOL
2 stops28h 53mAmerican Airlines
Fri 8/226:35 amOOL - ONT
2 stops26h 31mAmerican Airlines
Deal found 7/1$1,286
This lol.travel deal was found by Cheapflights users on 7/2. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/256:50 pmONT - MEL
1 stop20h 25mUnited Airlines
Sun 9/710:55 amMEL - ONT
1 stop18h 18mUnited Airlines
Deal found 7/2$1,289
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/196:50 pmONT - ADL
2 stops23h 45mUnited Airlines
Sat 8/236:05 amADL - ONT
2 stops30h 58mUnited Airlines
Deal found 7/1$1,292
This Jetabroad deal was found by Cheapflights users on 6/30. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:35 amONT - BNE
2 stops30h 25mHawaiian Airlines
Fri 9/123:05 pmBNE - ONT
3 stops35h 21mHawaiian Airlines
Deal found 6/30$1,298
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 9/201:42 pmONT - CNS
2 stops33h 13mUnited Airlines
Sat 9/276:00 amCNS - ONT
2 stops33h 42mUnited Airlines
Deal found 7/1$1,313
This Mytrip deal was found by Cheapflights users on 7/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1512:45 amONT - PER
2 stops33h 55mMultiple Airlines
Sat 8/239:55 pmPER - ONT
3 stops35h 45mMultiple Airlines
Deal found 7/2$1,450

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 2, 2025.
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

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 12/9

6:42 pm-9:15 am

1 stop19h 33m

Sydney Kingsford Smith

Fri 1/23

12:10 pm-9:59 am

1 stop16h 49m

$870

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 10/28

10:06 am-9:00 am

2 stops28h 54m

Sydney Kingsford Smith

Thu 11/13

5:45 pm-10:00 pm

2 stops23h 15m

$939

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Mon 12/1

6:38 pm-7:30 am

1 stop18h 52m

Brisbane

Sun 12/14

11:40 am-12:14 pm

1 stop18h 34m

$1,065

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 10/22

11:07 am-7:45 pm

1 stop38h 38m

Sydney Kingsford Smith

Sat 11/22

9:40 pm-9:55 pm

1 stop19h 15m

$1,076

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 8/14

9:00 am-2:40 pm

1 stop36h 40m

Sydney Kingsford Smith

Thu 8/21

3:10 pm-5:40 pm

2 stops43h 30m

$1,126

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Sun 10/12

12:10 am-12:05 am

2 stops29h 55m

Melbourne

Sat 10/25

1:25 am-5:50 pm

2 stops34h 25m

$1,239

OntarioCoolangatta

ONT - OOL

ONTOOL

Ontario

Fri 8/15

12:47 pm-10:40 am

2 stops28h 53m

Coolangatta Gold Coast

Fri 8/22

6:35 am-4:06 pm

2 stops26h 31m

$1,286

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Mon 8/25

6:50 pm-8:15 am

1 stop20h 25m

Melbourne

Sun 9/7

10:55 am-12:13 pm

1 stop18h 18m

$1,289

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Tue 8/19

6:50 pm-11:05 am

2 stops23h 45m

Adelaide

Sat 8/23

6:05 am-8:33 pm

2 stops30h 58m

$1,292

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Thu 9/4

8:35 am-8:00 am

2 stops30h 25m

Brisbane

Fri 9/12

3:05 pm-9:26 am

3 stops35h 21m

$1,298

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 48 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, February is the cheapest month in which you can book a flight from Ontario to Australia (average of $1,040). Flying from Ontario to Australia in December is currently the most expensive (average of $1,630). 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.

What is the cheapest time of day to fly from ONT to AU?

Find hourly flight availability from Ontario to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Australia as you normally would.

Reviews of airlines servicing Australia

Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated July 2, 2025.
Get a feel of what it's like to fly with China Airlines, Alaska Airlines, and Hawaiian Airlines from Ontario to Australia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
747 reviews

Boarding

8.3

Overall

8.3

Comfort

8.0

Crew

8.5

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
China Airlines
8.3
Very good
747 reviews
China Airlines
8.3
Very good
747 reviews

Boarding

8.3

Overall

8.3

Comfort

8.0

Crew

8.5

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Alaska Airlines
8.0
Very good
10,000 reviews
China Airlines
8.3
Very good
747 reviews

Boarding

8.3

Overall

8.3

Comfort

8.0

Crew

8.5

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Hawaiian Airlines
7.8
Good
2,540 reviews
China Airlines
8.3
Very good
747 reviews

Boarding

8.3

Overall

8.3

Comfort

8.0

Crew

8.5

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Qatar Airways
7.4
Good
3,593 reviews
China Airlines
8.3
Very good
747 reviews

Boarding

8.3

Overall

8.3

Comfort

8.0

Crew

8.5

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
United Airlines
7.4
Good
8,861 reviews
China Airlines
8.3
Very good
747 reviews

Boarding

8.3

Overall

8.3

Comfort

8.0

Crew

8.5

Entertainment

8.0

Food

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

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.

  • What are the cheapest airlines to fly from Ontario to Australia one-way?

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $427. United Airlines flights start at $617 while deals on Alaska Airlines start at $631 one-way.

  • 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, February is the cheapest month in which you can book a flight from Ontario to Australia (average of $1,040). Flying from Ontario to Australia in December is currently the most expensive (average of $1,630). 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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Alternative routes for Ontario to Australia

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Ontario to Australia

Discover the top airline that operate flights from Ontario to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,127FlexibilityNo cancel feeOn-time69%

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