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$428+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,046
(Delta)

One-way from

$428
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$940
Provider with most accurate pricing for Los Angeles-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Sydney Kingsford Smith flights.
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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. 14% potential increase in price ($165 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/156:00 amONT - SYD
2 stops31h 35mDelta
Fri 7/189:25 amSYD - ONT
2 stops31h 17mDelta
Deal found 4/30$1,046
This United Airlines deal was found by Cheapflights users on 4/29. 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 11/46:42 pmONT - BNE
1 stop18h 48mUnited Airlines
Tue 11/1811:40 amBNE - ONT
1 stop19h 30mUnited Airlines
Deal found 4/29$1,063
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 11/49:50 amONT - SYD
1 stop38h 55mAlaska Airlines
Fri 11/219:40 pmSYD - ONT
1 stop19h 15mAlaska Airlines
Deal found 4/30$1,074
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Sun 6/155:10 amONT - SYD
2 stops32h 45mUnited Airlines
Fri 7/1810:20 amSYD - ONT
1 stop18h 54mUnited Airlines
Deal found 4/30$1,077
This Gurufare deal was found by Cheapflights users on 4/29. 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.
Tue 5/69:45 amONT - MEL
2 stops44h 50mMultiple Airlines
Tue 5/131:00 pmMEL - ONT
2 stops25h 50mMultiple Airlines
Deal found 4/29$1,137
This Flightnetwork deal was found by Cheapflights users on 4/30. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/19:45 amONT - SYD
1 stop41h 00mHawaiian Airlines
Thu 5/89:40 pmSYD - ONT
1 stop17h 10mHawaiian Airlines
Deal found 4/30$1,212
This United Airlines deal was found by Cheapflights users on 4/29. 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 6/236:41 pmONT - MEL
1 stop20h 34mUnited Airlines
Sun 7/610:55 amMEL - ONT
1 stop18h 19mUnited Airlines
Deal found 4/29$1,290
This Kissandfly.com deal was found by Cheapflights users on 4/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/231:36 pmONT - MEL
1 stop25h 39mLufthansa
Sun 7/610:55 amMEL - ONT
1 stop23h 48mLufthansa
Deal found 4/30$1,341
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Wed 8/612:47 pmONT - BNE
2 stops23h 38mAmerican Airlines
Sat 8/308:05 pmBNE - ONT
2 stops30h 54mAmerican Airlines
Deal found 4/28$1,367
This Gurufare deal was found by Cheapflights users on 4/29. 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.
Thu 5/19:45 amONT - BNE
2 stops44h 20mMultiple Airlines
Fri 5/235:05 pmBNE - ONT
2 stops21h 50mMultiple Airlines
Deal found 4/29$1,376
This Jetabroad deal was found by Cheapflights users on 4/29. 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.
Tue 5/64:29 pmONT - MEL
3 stops46h 51mHawaiian Airlines
Tue 5/135:00 pmMEL - ONT
2 stops21h 50mHawaiian Airlines
Deal found 4/29$1,403
This Kissandfly.com deal was found by Cheapflights users on 4/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/16:00 amONT - SYD
1 stop31h 55mLufthansa
Sat 6/1410:20 amSYD - ONT
2 stops27h 44mLufthansa
Deal found 4/30$1,405

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 May 1, 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

Sun 6/15

6:00 am-6:35 am

2 stops31h 35m

Sydney Kingsford Smith

Fri 7/18

9:25 am-11:42 pm

2 stops31h 17m

$1,046

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 10/16

9:50 am-7:45 pm

1 stop39h 55m

Sydney Kingsford Smith

Thu 11/6

9:40 pm-9:55 pm

1 stop19h 15m

$1,074

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/15

5:10 am-6:55 am

2 stops32h 45m

Sydney Kingsford Smith

Fri 7/18

10:20 am-12:14 pm

1 stop18h 54m

$1,077

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Mon 6/23

6:41 pm-8:15 am

1 stop20h 34m

Melbourne

Sun 7/6

10:55 am-12:14 pm

1 stop18h 19m

$1,290

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Mon 6/23

1:36 pm-6:30 am

1 stop23h 54m

Brisbane

Tue 8/5

10:30 am-12:14 pm

1 stop18h 44m

$1,305

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 5/18

9:50 am-7:45 pm

1 stop40h 55m

Sydney Kingsford Smith

Sun 6/1

9:40 pm-9:55 pm

1 stop17h 15m

$1,332

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Mon 6/23

1:36 pm-8:15 am

1 stop25h 39m

Melbourne

Sun 7/6

10:55 am-5:43 pm

1 stop23h 48m

$1,341

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Wed 8/6

12:47 pm-5:25 am

2 stops23h 38m

Brisbane

Sat 8/30

8:05 pm-9:59 am

2 stops30h 54m

$1,367

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/1

6:00 am-6:55 am

1 stop31h 55m

Sydney Kingsford Smith

Sat 6/14

10:20 am-9:04 pm

2 stops27h 44m

$1,405

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 8/22

8:35 am-7:45 pm

1 stop18h 10m

Sydney Kingsford Smith

Fri 8/29

10:10 pm-6:40 pm

1 stop37h 30m

$1,471

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 59 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, March is the cheapest month in which you can book a flight from Ontario to Australia (average of $1,043). Flying from Ontario to Australia in December is currently the most expensive (average of $1,643). 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 May 1, 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.

Rainfall in Australia by month

Plan your trip to Australia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Australia ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Australia when rainfall is around 2.0 in.

Temperature in Australia by month

Plan your trip to Australia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Australia, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

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 May 1, 2025.
Read through reviews of airlines operating flights from Ontario to Australia, such as Japan Airlines, China Airlines and Alaska Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,464 reviews

Entertainment

7.8

Food

7.7

Crew

8.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
Japan Airlines
8.3
Very good
1,464 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Entertainment

7.8

Food

7.7

Crew

8.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
China Airlines
8.3
Very good
732 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Entertainment

7.8

Food

7.7

Crew

8.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
Alaska Airlines
8.0
Very good
9,968 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Entertainment

7.8

Food

7.7

Crew

8.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
Delta
8.0
Very good
7,934 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Entertainment

7.8

Food

7.7

Crew

8.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
Hawaiian Airlines
7.9
Good
2,408 reviews
Japan Airlines
8.3
Very good
1,464 reviews

Entertainment

7.8

Food

7.7

Crew

8.7

Comfort

8.2

Overall

8.3

Boarding

8.4

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

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 United Airlines, which is currently one of the cheapest options available, starting at $561. Hawaiian Airlines flights start at $644 while deals on Alaska Airlines start at $653 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, March is the cheapest month in which you can book a flight from Ontario to Australia (average of $1,043). Flying from Ontario to Australia in December is currently the most expensive (average of $1,643). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ontario to Australia

Discover the top 3 airlines 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$732Average$855FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$909Average$1,171FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,042Average$1,107FlexibilityNo cancel feeOn-time74%

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