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$424+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Mar 25 — Apr 11
Tue 3/25
Tue 4/1
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 March 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,074
(Alaska Airlines)

One-way from

$424
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$989
Provider with most accurate pricing for Los Angeles-Sydney Kingsford Smith flight deals.
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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 ($174 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 20, 2025.

This United Airlines deal was found by Cheapflights users on 3/19. 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 3/206:45 pmONT - BNE
1 stop18h 45mUnited Airlines
Thu 3/2710:40 amBNE - ONT
1 stop16h 14mUnited Airlines
Deal found 3/19$824
This United Airlines deal was found by Cheapflights users on 3/18. 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 3/2010:38 amONT - MEL
1 stop28h 22mUnited Airlines
Thu 3/2712:00 pmMEL - ONT
1 stop24h 04mUnited Airlines
Deal found 3/18$1,060
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/296:58 pmONT - SYD
2 stops31h 47mAlaska Airlines
Tue 8/199:40 pmSYD - ONT
2 stops30h 05mAlaska Airlines
Deal found 3/18$1,061
This Jetabroad deal was found by Cheapflights users on 3/19. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/292:21 pmONT - SYD
2 stops36h 24mHawaiian Airlines
Tue 8/59:40 pmSYD - ONT
2 stops28h 43mHawaiian Airlines
Deal found 3/19$1,140
This Kissandfly.com deal was found by Cheapflights users on 3/18. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/201:40 pmONT - MEL
2 stops25h 20mLufthansa
Thu 3/2712:00 pmMEL - ONT
1 stop24h 04mLufthansa
Deal found 3/18$1,242
This American Airlines deal was found by Cheapflights users on 3/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/1512:55 pmONT - SYD
2 stops25h 10mAmerican Airlines
Fri 7/189:10 amSYD - ONT
2 stops26h 02mAmerican Airlines
Deal found 3/19$1,300
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Sun 5/113:10 pmONT - SYD
1 stop22h 45mUnited Airlines
Sun 5/2510:20 amSYD - ONT
1 stop18h 54mUnited Airlines
Deal found 3/19$1,302
This American Airlines deal was found by Cheapflights users on 3/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/137:30 amONT - MEL
1 stop28h 30mAmerican Airlines
Sat 5/249:00 amMEL - ONT
2 stops50h 36mAmerican Airlines
Deal found 3/19$1,336
This Kissandfly.com deal was found by Cheapflights users on 3/18. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/93:10 pmONT - SYD
1 stop22h 45mMultiple Airlines
Mon 5/124:20 pmSYD - ONT
1 stop22h 30mMultiple Airlines
Deal found 3/18$1,341
This Mytrip deal was found by Cheapflights users on 3/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/512:10 amONT - PER
3 stops34h 30mMultiple Airlines
Tue 5/135:10 amPER - ONT
2 stops27h 50mMultiple Airlines
Deal found 3/19$1,358
This oojo deal was found by Cheapflights users on 3/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/186:00 amONT - PER
2 stops45h 40mQatar Airways
Tue 5/1310:45 pmPER - ONT
2 stops36h 44mQatar Airways
Deal found 3/19$1,411
This Air Canada deal was found by Cheapflights users on 3/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/281:28 pmONT - SYD
2 stops24h 52mAir Canada
Wed 8/209:20 amSYD - ONT
2 stops40h 18mAir Canada
Deal found 3/18$1,415

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 March 20, 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 7/29

6:58 pm-7:45 pm

2 stops31h 47m

Sydney Kingsford Smith

Tue 8/19

9:40 pm-10:45 am

2 stops30h 05m

$1,061

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 7/29

2:21 pm-7:45 pm

2 stops36h 24m

Sydney Kingsford Smith

Tue 8/5

9:40 pm-9:23 am

2 stops28h 43m

$1,140

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Sun 5/11

1:45 pm-8:15 am

1 stop25h 30m

Melbourne

Sun 5/25

10:55 am-12:14 pm

1 stop18h 19m

$1,291

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Sun 5/11

6:48 pm-6:30 am

1 stop18h 42m

Brisbane

Sun 5/25

10:30 am-12:14 pm

1 stop18h 44m

$1,293

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/15

12:55 pm-7:05 am

2 stops25h 10m

Sydney Kingsford Smith

Fri 7/18

9:10 am-6:12 pm

2 stops26h 02m

$1,300

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 5/11

3:10 pm-6:55 am

1 stop22h 45m

Sydney Kingsford Smith

Sun 5/25

10:20 am-12:14 pm

1 stop18h 54m

$1,302

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Tue 5/13

7:30 am-5:00 am

1 stop28h 30m

Melbourne

Sat 5/24

9:00 am-6:36 pm

2 stops50h 36m

$1,336

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 5/9

3:10 pm-6:55 am

1 stop22h 45m

Sydney Kingsford Smith

Mon 5/12

4:20 pm-9:50 pm

1 stop22h 30m

$1,341

OntarioPerth

ONT - PER

ONTPER

Ontario

Mon 5/5

12:10 am-1:40 am

3 stops34h 30m

Perth

Tue 5/13

5:10 am-6:00 pm

2 stops27h 50m

$1,358

OntarioPerth

ONT - PER

ONTPER

Ontario

Fri 4/18

6:00 am-6:40 pm

2 stops45h 40m

Perth

Tue 5/13

10:45 pm-8:29 pm

2 stops36h 44m

$1,411

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 52 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 March 20, 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 March 20, 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
1,437 reviews

Comfort

8.2

Boarding

8.4

Food

7.7

Crew

8.7

Entertainment

7.8

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Japan Airlines
8.3
Very good
1,437 reviews
Japan Airlines
8.3
Very good
1,437 reviews

Comfort

8.2

Boarding

8.4

Food

7.7

Crew

8.7

Entertainment

7.8

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
China Airlines
8.2
Very good
725 reviews
Japan Airlines
8.3
Very good
1,437 reviews

Comfort

8.2

Boarding

8.4

Food

7.7

Crew

8.7

Entertainment

7.8

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Alaska Airlines
8.0
Very good
9,753 reviews
Japan Airlines
8.3
Very good
1,437 reviews

Comfort

8.2

Boarding

8.4

Food

7.7

Crew

8.7

Entertainment

7.8

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Hawaiian Airlines
7.9
Good
2,325 reviews
Japan Airlines
8.3
Very good
1,437 reviews

Comfort

8.2

Boarding

8.4

Food

7.7

Crew

8.7

Entertainment

7.8

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.
Qatar Airways
7.4
Good
3,539 reviews
Japan Airlines
8.3
Very good
1,437 reviews

Comfort

8.2

Boarding

8.4

Food

7.7

Crew

8.7

Entertainment

7.8

Overall

8.3

Reviews

1 / 20
10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

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 $424. American Airlines flights start at $567 while deals on Hawaiian Airlines start at $622 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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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 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 March 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$732Average$855FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$909Average$1,245FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,042Average$1,086FlexibilityNo cancel feeOn-time74%
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