HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$431+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Australia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,060
(Alaska Airlines)

One-way from

$431
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$944
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. 14% potential increase in price ($169 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 15, 2025.

This Alaska Airlines deal was found by Cheapflights users on 4/15. 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 9/278:35 amONT - SYD
1 stop18h 10mAlaska Airlines
Sat 10/189:40 pmSYD - ONT
1 stop18h 15mAlaska Airlines
Deal found 4/15$1,056
This Trip.com deal was found by Cheapflights users on 4/15. 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 9/118:35 amONT - SYD
1 stop37h 05mMultiple Airlines
Thu 9/1810:10 pmSYD - ONT
1 stop36h 50mMultiple Airlines
Deal found 4/15$1,181
This Hawaiian Airlines deal was found by Cheapflights users on 4/14. 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.
Tue 10/149:50 amONT - SYD
1 stop39h 55mHawaiian Airlines
Tue 10/219:40 pmSYD - ONT
1 stop18h 15mHawaiian Airlines
Deal found 4/14$1,192
This Delta deal was found by Cheapflights users on 4/15. 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 6/159:44 amONT - SYD
2 stops27h 51mDelta
Fri 7/189:25 amSYD - ONT
2 stops23h 52mDelta
Deal found 4/15$1,207
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/226:41 pmONT - SYD
1 stop19h 14mUnited Airlines
Fri 6/610:20 amSYD - ONT
1 stop18h 54mUnited Airlines
Deal found 4/15$1,236
This United Airlines deal was found by Cheapflights users on 4/15. 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 6/96:41 pmONT - MEL
1 stop20h 34mUnited Airlines
Sun 6/2210:55 amMEL - ONT
1 stop18h 19mUnited Airlines
Deal found 4/15$1,283
This United Airlines deal was found by Cheapflights users on 4/15. 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 6/96:41 pmONT - BNE
1 stop18h 49mUnited Airlines
Tue 6/2410:30 amBNE - ONT
1 stop18h 44mUnited Airlines
Deal found 4/15$1,296
This oojo deal was found by Cheapflights users on 4/15. 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.
Tue 9/211:39 amONT - PER
2 stops33h 16mQatar Airways
Fri 9/2610:45 pmPER - ONT
2 stops34h 38mQatar Airways
Deal found 4/15$1,409
This Mytrip deal was found by Cheapflights users on 4/15. 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 5/1112:10 amONT - PER
2 stops34h 30mMultiple Airlines
Tue 6/249:55 pmPER - ONT
3 stops34h 10mMultiple Airlines
Deal found 4/15$1,475
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/41:45 pmONT - OOL
2 stops27h 55mUnited Airlines
Sat 5/246:00 amOOL - ONT
2 stops23h 14mUnited Airlines
Deal found 4/13$1,519
This Fiji Airways deal was found by Cheapflights users on 4/15. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/911:59 pmONT - BNE
2 stops41h 26mMultiple Airlines
Tue 6/2411:40 amBNE - ONT
2 stops24h 21mMultiple Airlines
Deal found 4/15$1,578
This Kissandfly.com deal was found by Cheapflights users on 4/15. 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 6/91:33 pmONT - MEL
2 stops25h 42mLufthansa
Sun 6/2210:55 amMEL - ONT
1 stop23h 44mLufthansa
Deal found 4/15$1,634

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 April 15, 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

Sat 9/27

8:35 am-7:45 pm

1 stop18h 10m

Sydney Kingsford Smith

Sat 10/18

9:40 pm-9:55 pm

1 stop18h 15m

$1,056

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 9/11

8:35 am-2:40 pm

1 stop37h 05m

Sydney Kingsford Smith

Thu 9/18

10:10 pm-6:00 pm

1 stop36h 50m

$1,181

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/15

9:44 am-6:35 am

2 stops27h 51m

Sydney Kingsford Smith

Fri 7/18

9:25 am-4:17 pm

2 stops23h 52m

$1,207

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 5/22

6:41 pm-6:55 am

1 stop19h 14m

Sydney Kingsford Smith

Fri 6/6

10:20 am-12:14 pm

1 stop18h 54m

$1,236

OntarioMelbourne

ONT - MEL

ONTMEL

Ontario

Mon 6/9

6:41 pm-8:15 am

1 stop20h 34m

Melbourne

Sun 6/22

10:55 am-12:14 pm

1 stop18h 19m

$1,283

OntarioBrisbane

ONT - BNE

ONTBNE

Ontario

Mon 6/9

6:41 pm-6:30 am

1 stop18h 49m

Brisbane

Tue 6/24

10:30 am-12:14 pm

1 stop18h 44m

$1,296

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 5/6

9:45 am-7:45 pm

1 stop41h 00m

Sydney Kingsford Smith

Sat 5/31

9:40 pm-9:55 pm

1 stop17h 15m

$1,371

OntarioPerth

ONT - PER

ONTPER

Ontario

Tue 9/2

11:39 am-11:55 am

2 stops33h 16m

Perth

Fri 9/26

10:45 pm-6:23 pm

2 stops34h 38m

$1,409

OntarioPerth

ONT - PER

ONTPER

Ontario

Sun 5/11

12:10 am-1:40 am

2 stops34h 30m

Perth

Tue 6/24

9:55 pm-5:05 pm

3 stops34h 10m

$1,475

OntarioCoolangatta

ONT - OOL

ONTOOL

Ontario

Sun 5/4

1:45 pm-10:40 am

2 stops27h 55m

Coolangatta Gold Coast

Sat 5/24

6:00 am-12:14 pm

2 stops23h 14m

$1,519

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 56 results
1
2
3
...
6

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 $1,046). 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 April 15, 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 April 15, 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
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

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
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

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
729 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

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
9,876 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

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.
Delta
8.0
Very good
7,917 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

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
2,374 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Overall

8.3

Crew

8.7

Boarding

8.4

Comfort

8.2

Entertainment

7.8

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 Hawaiian Airlines, which is currently one of the cheapest options available, starting at $619. Alaska Airlines flights start at $630 while deals on United Airlines start at $721 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 $1,046). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Australia

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Sydney flights
Los Angeles to Papeete flights
Los Angeles to Auckland flights
San Francisco to Sydney flights
Los Angeles to Melbourne flights
San Francisco to Melbourne flights
Los Angeles to Brisbane flights
San Francisco to Auckland flights
Ontario to Sydney flights
Los Angeles to Nadi flights
San Francisco to Papeete flights
Santa Ana to Sydney flights
San Francisco to Brisbane flights
San Francisco to Nadi flights
Los Angeles to Avalon flights
Ontario to Papeete flights
San Jose to Sydney flights
Los Angeles to Vaitape flights
Ontario to Auckland flights
Oakland to Sydney flights
Santa Ana to Auckland flights
Burbank to Sydney flights
San Francisco to Avalon flights
San Diego to Sydney flights
Ontario to Nadi flights
San Diego to Papeete flights
Ontario to Melbourne flights
Santa Ana to Nadi flights
San Jose to Melbourne flights
San Jose to Papeete flights
Los Angeles to Apia flights
Ontario to Brisbane flights
Los Angeles to Perth flights
San Jose to Auckland flights
Las Vegas to Sydney flights
San Jose to Brisbane flights
Los Angeles to Christchurch flights
San Diego to Melbourne flights
San Jose to Nadi flights
Santa Ana to Brisbane flights
San Francisco to Vaitape flights
Los Angeles to Tamuning flights
Los Angeles to Adelaide flights
San Diego to Auckland flights
San Francisco to Christchurch flights
Oakland to Brisbane flights
Ontario to Perth flights
Santa Ana to Melbourne flights
Los Angeles to Cairns flights
Los Angeles to Temae flights

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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$732Average$855FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$909Average$1,245FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,042Average$1,107FlexibilityNo cancel feeOn-time74%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.