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$472+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Aug 22 — Aug 291
Sat 8/22
Sat 8/29
1 adult, Economy
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Cheap 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 23, 2026.

This SmartFares deal was found by Cheapflights users on 7/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:00 am
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Thu 12/39:40 pm
SYD
-
ONT
1 stop18h 48m
Multiple Airlines
Deal found 7/20$963
This SmartFares deal was found by Cheapflights users on 7/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 8/188:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/19$971
This SmartFares deal was found by Cheapflights users on 7/21. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:00 am
ONT
-
SYD
1 stop18h 45m
Multiple Airlines
Sun 11/19:40 pm
SYD
-
ONT
1 stop18h 52m
Multiple Airlines
Deal found 7/21$973
This SmartFares deal was found by Cheapflights users on 7/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/238:45 pm
SYD
-
ONT
1 stop18h 25m
Multiple Airlines
Deal found 7/19$990
This SmartFares deal was found by Cheapflights users on 7/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/29:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/98:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/20$998
This SmartFares deal was found by Cheapflights users on 7/18. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am
ONT
-
SYD
1 stop18h 45m
Multiple Airlines
Tue 11/109:40 pm
SYD
-
ONT
1 stop18h 52m
Multiple Airlines
Deal found 7/18$999
This Ovago deal was found by Cheapflights users on 7/18. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:00 am
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Sun 10/259:40 pm
SYD
-
ONT
1 stop17h 49m
Multiple Airlines
Deal found 7/18$1,000
This SmartFares deal was found by Cheapflights users on 7/18. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 8/188:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 7/18$1,016
This Cheapflightsfares deal was found by Cheapflights users on 7/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/119:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 8/258:45 pm
SYD
-
ONT
1 stop18h 25m
Multiple Airlines
Deal found 7/20$1,019
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 8/259:31 am
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Sun 8/308:45 pm
SYD
-
ONT
1 stop18h 25m
Multiple Airlines
Deal found 7/22$1,020
This Ovago deal was found by Cheapflights users on 7/22. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:31 am
ONT
-
SYD
1 stop40h 19m
Multiple Airlines
Sun 10/118:45 pm
SYD
-
ONT
1 stop18h 44m
Multiple Airlines
Deal found 7/22$1,024
This American Airlines deal was found by Cheapflights users on 7/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1012:59 pm
ONT
-
MEL
2 stops24h 46m
American Airlines
Mon 8/241:35 pm
MEL
-
ONT
1 stop26h 24m
American Airlines
Deal found 7/21$1,047

Find 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 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$963
(SmartFares)

One-way from

$472
(SmartFares)

Popular in

December

Cheapest in

May

Average price

$1,021
Provider with most accurate pricing for Los Angeles-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Sydney Kingsford Smith flights.
Search Deals
From Ontario to Australia
Search Deals
One-way flight from Ontario to Australia
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 23, 2026.
Use the filters below to find and compare flights from Ontario to Australia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Sun 8/9

6:39 pm-8:15 am

1 stop20h 36m

Melbourne

Mon 8/24

10:55 am-12:12 pm

1 stop18h 17m

$1,056

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 8/23

9:31 am-6:50 pm

1 stop40h 19m

Sydney Kingsford Smith

Thu 9/3

8:45 pm-10:10 pm

1 stop18h 25m

$1,070
Quickest round-trip

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Fri 8/7

6:39 pm-6:30 am

1 stop18h 51m

Brisbane

Fri 8/21

10:30 am-12:12 pm

1 stop18h 42m

$1,089

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 11/11

4:04 pm-9:20 am

1 stop22h 16m

Sydney Kingsford Smith

Sun 12/6

11:50 am-12:20 pm

1 stop19h 30m

$1,095

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 8/17

7:13 pm-6:55 am

1 stop18h 42m

Sydney Kingsford Smith

Mon 8/24

10:20 am-12:12 pm

1 stop18h 52m

$1,095

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 9/22

1:18 pm-6:55 am

2 stops24h 37m

Sydney Kingsford Smith

Tue 9/29

10:20 am-10:23 am

1 stop17h 03m

$1,100

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Mon 8/17

7:13 pm-8:15 am

1 stop20h 02m

Melbourne

Sun 8/30

10:55 am-12:12 pm

1 stop18h 17m

$1,102

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Wed 8/12

5:00 am-8:15 am

2 stops34h 15m

Melbourne

Wed 8/19

10:55 am-6:16 pm

1 stop24h 21m

$1,116

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Mon 8/3

6:39 pm-11:20 am

2 stops23h 41m

Melbourne

Mon 8/10

10:55 am-12:12 pm

1 stop18h 17m

$1,130

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Wed 10/21

4:03 pm-9:15 am

1 stop23h 12m

Melbourne

Fri 10/30

11:45 am-12:01 pm

1 stop18h 16m

$1,162

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 60 resultsSorted by cheapest first
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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

No data available for this route at this time. Please check back soon.

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 23, 2026.
Get a feel of what it's like to fly with United 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.
United Airlines
7.4
Good
10,020 reviews

Comfort

7.3

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
10,020 reviews
United Airlines
7.4
Good
10,020 reviews

Comfort

7.3

Boarding

7.7

Food

6.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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.

  • How long is the flight from Ontario to Australia?

    For as low as $1,056, United Airlines can have you in Australia from Ontario in 20h 36m. There are 7966 mi between Ontario and Australia. This flight may include one or multiple stops.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,049Average$1,111FlexibilityNo cancel feeOn-time69%

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