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Cheap flights from Australia to Ontario from $858

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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
27 Apr — 4 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Australia to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Australia to Ontario
Explore the most affordable flight options available from Australia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2026.

Tue 1/920:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Wed 9/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 23/3$1,116
Sun 30/820:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Fri 18/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 23/3$1,189
Sat 29/820:45
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Sat 19/908:00
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 23/3$1,266
Thu 7/510:55
MEL
-
ONT
1 stop18h 27m
United Airlines
Tue 28/716:20
ONT
-
MEL
1 stop22h 55m
United Airlines
Deal found 23/3$1,314
Thu 21/510:20
SYD
-
ONT
1 stop18h 52m
United Airlines
Sun 21/618:39
ONT
-
SYD
1 stop19h 16m
United Airlines
Deal found 23/3$1,317
Tue 26/510:55
MEL
-
ONT
1 stop18h 17m
United Airlines
Sun 31/518:30
ONT
-
MEL
2 stops44h 45m
United Airlines
Deal found 23/3$1,328
Sun 2/810:55
MEL
-
ONT
1 stop18h 17m
United Airlines
Sun 30/819:13
ONT
-
MEL
1 stop20h 02m
United Airlines
Deal found 27/3$1,430
Mon 3/810:55
MEL
-
ONT
1 stop18h 17m
United Airlines
Thu 13/819:13
ONT
-
MEL
1 stop20h 02m
United Airlines
Deal found 26/3$1,437
Sun 10/510:55
MEL
-
ONT
1 stop18h 27m
United Airlines
Thu 21/518:39
ONT
-
MEL
1 stop20h 36m
United Airlines
Deal found 26/3$1,446
Tue 19/510:55
MEL
-
ONT
2 stops26h 41m
United Airlines
Mon 25/518:30
ONT
-
MEL
2 stops44h 45m
United Airlines
Deal found 25/3$1,448
Wed 6/510:55
MEL
-
ONT
2 stops28h 03m
United Airlines
Sat 23/513:50
ONT
-
MEL
1 stop25h 25m
United Airlines
Deal found 23/3$1,452
Fri 24/410:55
MEL
-
ONT
1 stop18h 25m
United Airlines
Fri 8/518:59
ONT
-
MEL
1 stop20h 16m
United Airlines
Deal found 25/3$1,455

Find flight deals from Australia to Ontario

Keep the following information in mind while searching for Australia to Ontario flight deals. Data was last updated 28 March 2026.

Round-trip from

$1,314

One-way from

$858

Popular in

December

Cheapest in

August

Average price

$1,159
United Airlines
  • United Airlines
  • 7/5-28/7
  • 2 total stops
  • 41h 22m total
  • Australia to Ontario
Search Deals
United Airlines
  • United Airlines
  • 5/6
  • 2 total stops
  • 42h 52m total
  • Australia to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($129 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($41 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Australia to Ontario 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 647,157 searches. Data last updated 28 March 2026.
Use the filters below to find and compare flights from Australia to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 1/5

10:55-12:22

1 stop18h 27m

Ontario

Fri 8/5

18:59-08:15

1 stop20h 16m

$1,446

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 15/5

10:55-20:36

2 stops26h 41m

Ontario

Sat 23/5

05:00-08:15

2 stops34h 15m

$1,446

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 15/5

10:55-12:22

1 stop18h 27m

Ontario

Fri 22/5

18:39-08:15

1 stop20h 36m

$1,446
Fastest return journey

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 4/8

10:20-12:12

1 stop18h 52m

Ontario

Fri 28/8

19:13-06:55

1 stop18h 42m

$1,585

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 2/8

10:20-12:12

1 stop18h 52m

Ontario

Sun 30/8

19:13-06:55

1 stop18h 42m

$1,585

AdelaideOntario

ADL - ONT

ADLONT

Adelaide

Mon 3/8

06:40-12:12

2 stops22h 02m

Ontario

Wed 2/9

19:13-11:05

2 stops23h 22m

$1,754

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 9/5

07:00-09:41

2 stops19h 41m

Ontario

Tue 19/5

13:40-08:15

2 stops25h 35m

$1,779

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Mon 3/8

06:30-12:12

2 stops22h 42m

Ontario

Mon 17/8

19:13-08:15

1 stop20h 02m

$1,780

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 14/5

10:55-12:22

1 stop18h 27m

Ontario

Sat 23/5

18:39-10:35

2 stops22h 56m

$1,790

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 24/4

14:25-21:10

2 stops23h 45m

Ontario

Wed 9/12

09:00-06:35

2 stops51h 35m

$1,848

Flights are sorted by cheapest return flights first.

Deals found on 27/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Australia to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Australia with our price prediction graph.
Estimated return 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 Australia to Ontario

What is the cheapest month to book a flight from Australia to Ontario?

Currently, March is the cheapest month in which you can book a flight from Australia to Ontario (average of $785). Flying from Australia to Ontario in September is currently the most expensive (average of $910). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 28 March 2026.
Check out reviews from past customers who have flown with United Airlines from Australia to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,499 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,499 reviews
United Airlines
7.4
Good
9,499 reviews
Check prices

Crew

8.1

Boarding

7.7

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Australia to Ontario. 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 into for flights to Ontario from Australia?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Australia. Ontario is conveniently located just 4.9 km from Ontario’s city centre.

  • How long is the flight from Australia to Ontario?

    United Airlines and China Airlines can get you from Australia to Ontario in just under 18h 27m. Your travel time can differ by up to 27h 23m. The distance between Australia and Ontario is about 12820 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Australia to Ontario?

    While some choose either Sydney Kingsford Smith - Ontario or Brisbane - Ontario, Melbourne - Ontario is the most popular route from Australia to Ontario.

  • Can I find deals for flights from Australia to Ontario that include hotel bookings?

    Yes. In addition to deals on Australia to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Australia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Australia to Ontario.

  • Can I find deals for business class flights from Australia to Ontario?

    Yes. Cheapflights offers flight deals from Australia to Ontario 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 Australia to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Australia to Ontario (average of $785). Flying from Australia to Ontario in September is currently the most expensive (average of $910). 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.

Top airline flying from Australia to Ontario

Discover the top airline that operate flights from Australia to Ontario. 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 647,157 searches. Data last updated 28 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,319Average$1,549FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Australia to Ontario?

Cheapflights makes it easy to find Australia to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Australia to Ontario?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Australia.

Can Cheapflights find flights from Australia to Ontario with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Australia to Ontario, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Australia to Ontario become cheaper?

Not ready to book yet? You can track prices for flights from Australia to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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