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Cheap flights from Australia to Ontario from $705

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 20/2. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
17 Mar — 24 Mar1
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 15 February 2026.

Tue 10/313:15
SYD
-
ONT
2 stops28h 36m
Delta
Tue 17/306:00
ONT
-
SYD
2 stops31h 30m
Delta
Deal found 15/2$1,108
Mon 23/212:10
SYD
-
ONT
1 stop19h 28m
United Airlines
Sun 8/318:37
ONT
-
SYD
1 stop17h 43m
United Airlines
Deal found 12/2$1,132
Tue 2/610:20
SYD
-
ONT
1 stop18h 52m
United Airlines
Mon 31/805:00
ONT
-
SYD
2 stops32h 55m
United Airlines
Deal found 15/2$1,133
Thu 26/211:50
SYD
-
ONT
1 stop29h 09m
United Airlines
Sun 15/305:15
ONT
-
SYD
2 stops31h 05m
United Airlines
Deal found 12/2$1,140
Fri 5/610:20
SYD
-
ONT
1 stop18h 52m
United Airlines
Tue 1/913:00
ONT
-
SYD
2 stops24h 55m
United Airlines
Deal found 15/2$1,183
Sat 28/211:50
SYD
-
ONT
1 stop29h 09m
United Airlines
Sat 7/313:50
ONT
-
SYD
2 stops45h 30m
United Airlines
Deal found 13/2$1,190
Sun 8/312:10
SYD
-
ONT
1 stop18h 08m
Air New Zealand
Wed 25/318:37
ONT
-
SYD
1 stop17h 43m
Air New Zealand
Deal found 12/2$1,195
Wed 18/211:40
BNE
-
ONT
2 stops43h 03m
United Airlines
Sun 22/206:09
ONT
-
BNE
1 stop31h 21m
United Airlines
Deal found 14/2$1,200
Fri 27/211:40
BNE
-
ONT
1 stop18h 58m
United Airlines
Fri 13/318:37
ONT
-
BNE
1 stop18h 53m
United Airlines
Deal found 13/2$1,205
Sun 8/310:40
BNE
-
ONT
1 stop18h 38m
United Airlines
Thu 26/318:37
ONT
-
BNE
1 stop18h 53m
United Airlines
Deal found 12/2$1,207
Sat 28/211:40
BNE
-
ONT
1 stop19h 07m
United Airlines
Sat 7/318:37
ONT
-
BNE
1 stop18h 53m
United Airlines
Deal found 12/2$1,211
Sat 25/710:20
SYD
-
ONT
2 stops26h 57m
United Airlines
Fri 18/918:53
ONT
-
SYD
1 stop19h 02m
United Airlines
Deal found 13/2$1,232

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 15 February 2026.

Round-trip from

$1,132

One-way from

$705

Popular in

December

Cheapest in

August

Average price

$1,091
United Airlines
  • United Airlines
  • 25/2-4/3
  • 3 total stops
  • 52h 53m total
  • Australia to Ontario
Search Deals
United Airlines
  • United Airlines
  • 5/3
  • 2 total stops
  • 27h 10m total
  • Australia to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($131 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($40 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 15 February 2026.
Use the filters below to find and compare flights from Australia to Ontario that are best for you.

Fly from

Australia

Fly to

Ontario

Route

Depart

Return

Price

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 18/6

10:20-12:12

1 stop18h 52m

Ontario

Tue 30/6

18:53-06:55

1 stop19h 02m

$1,132

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 13/7

10:20-21:40

2 stops28h 20m

Ontario

Mon 20/7

13:00-06:55

2 stops24h 55m

$1,132

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 5/3

12:10-12:18

1 stop19h 08m

Ontario

Sun 15/3

13:40-06:20

1 stop22h 40m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 2/6

10:20-12:12

1 stop18h 52m

Ontario

Tue 9/6

18:39-06:55

1 stop19h 16m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 20/4

10:20-09:56

1 stop16h 36m

Ontario

Mon 4/5

18:59-06:55

1 stop18h 56m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 15/4

10:20-12:20

1 stop19h 00m

Ontario

Wed 22/4

11:05-06:55

1 stop26h 50m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 11/6

10:20-12:12

1 stop18h 52m

Ontario

Wed 2/9

05:00-06:55

2 stops32h 55m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 16/6

10:20-20:42

2 stops27h 22m

Ontario

Tue 14/7

13:33-06:55

1 stop24h 22m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 10/6

10:20-12:12

1 stop18h 52m

Ontario

Sun 30/8

05:00-06:55

2 stops32h 55m

$1,133

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 5/8

10:20-12:20

1 stop19h 00m

Ontario

Tue 18/8

18:53-06:55

1 stop19h 02m

$1,139

Flights are sorted by cheapest return flights first.

Deals found on 14/2

Showing 1-10 of 60 results
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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 $764). Flying from Australia to Ontario in December 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 15 February 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
9,299 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

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
9,299 reviews
United Airlines
7.4
Good
9,299 reviews
Check prices

Food

6.6

Boarding

7.7

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

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 can get you from Australia to Ontario in just under 18h 52m. Your travel time can differ by up to . The distance between Australia and Ontario is about 12125 km.

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

    While some choose either Melbourne - Ontario or Brisbane - Ontario, Sydney Kingsford Smith - 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 $764). Flying from Australia to Ontario in December 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 15 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,189Average$1,460FlexibilityNo 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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