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$571+ Cheap flights from Ontario (ONT) to Sydney (SYD)

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
May 7 — May 141
Thu 5/7
Thu 5/14
1 adult, Economy
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Cheap flight deals from Ontario to Sydney

Cheapest flights from Ontario to Sydney
Explore the most affordable flight options available from Ontario to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 7, 2026.

This SmartFares deal was found by Cheapflights users on 4/3. 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 5/269:40 am
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Tue 6/98:45 pm
SYD
-
ONT
1 stop18h 32m
Multiple Airlines
Deal found 4/3$1,087
This SmartFares deal was found by Cheapflights users on 4/3. 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 9/267:20 am
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Sat 10/38:45 pm
SYD
-
ONT
1 stop17h 43m
Multiple Airlines
Deal found 4/3$1,099
This Alaska Airlines deal was found by Cheapflights users on 4/3. 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 7/219:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/98:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 4/3$1,101
This SmartFares deal was found by Cheapflights users on 4/6. 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 9/27:20 am
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Sat 9/198:45 pm
SYD
-
ONT
1 stop17h 35m
Multiple Airlines
Deal found 4/6$1,107
This Vliegwinkel deal was found by Cheapflights users on 4/6. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:20 am
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Sat 9/58:45 pm
SYD
-
ONT
1 stop17h 35m
Multiple Airlines
Deal found 4/6$1,113
This SmartFares deal was found by Cheapflights users on 4/2. 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.
Thu 5/219:40 am
ONT
-
SYD
1 stop40h 10m
Multiple Airlines
Sun 5/318:45 pm
SYD
-
ONT
1 stop18h 32m
Multiple Airlines
Deal found 4/2$1,127
This SmartFares deal was found by Cheapflights users on 4/3. 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.
Thu 8/139:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/238:45 pm
SYD
-
ONT
1 stop17h 35m
Multiple Airlines
Deal found 4/3$1,128
This flugladen.de deal was found by Cheapflights users on 4/6. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:20 am
ONT
-
SYD
1 stop18h 30m
Multiple Airlines
Tue 9/298:45 pm
SYD
-
ONT
1 stop17h 35m
Multiple Airlines
Deal found 4/6$1,130
This United Airlines deal was found by Cheapflights users on 4/3. 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 5/36:59 pm
ONT
-
SYD
1 stop18h 56m
United Airlines
Sun 5/1710:20 am
SYD
-
ONT
1 stop19h 02m
United Airlines
Deal found 4/3$1,134
This United Airlines deal was found by Cheapflights users on 4/6. 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 5/316:39 pm
ONT
-
SYD
1 stop19h 16m
United Airlines
Sun 6/1410:20 am
SYD
-
ONT
1 stop18h 52m
United Airlines
Deal found 4/6$1,136
This Alaska Airlines deal was found by Cheapflights users on 4/2. 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.
Fri 8/149:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Sun 8/238:45 pm
SYD
-
ONT
1 stop17h 35m
Multiple Airlines
Deal found 4/2$1,141
This Alaska Airlines deal was found by Cheapflights users on 4/3. 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.
Wed 6/109:11 am
ONT
-
SYD
1 stop40h 39m
Multiple Airlines
Tue 6/168:45 pm
SYD
-
ONT
1 stop18h 00m
Multiple Airlines
Deal found 4/3$1,142

Find flight deals from Ontario to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,087
(SmartFares)

One-way from

$571
(SmartFares)

Popular in

December

Cheapest in

February

Average price

$924
Provider with most accurate pricing for Ontario-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Sydney Kingsford Smith flights.
Search Deals
From Ontario to Sydney Kingsford Smith
Search Deals
One-way flight from Ontario to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Sydney 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 7, 2026.
Use the filters below to find and compare flights from Ontario to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 5/18

6:59 pm-6:55 am

1 stop18h 56m

Sydney Kingsford Smith

Mon 5/25

10:20 am-12:12 pm

1 stop18h 52m

$1,146

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 4/22

11:05 am-6:55 am

1 stop26h 50m

Sydney Kingsford Smith

Mon 5/11

10:20 am-9:41 am

1 stop16h 21m

$1,146

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Wed 8/5

6:39 pm-6:55 am

1 stop19h 16m

Sydney Kingsford Smith

Wed 8/12

10:20 am-12:12 pm

1 stop18h 52m

$1,146

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 7/20

1:18 pm-6:55 am

2 stops24h 37m

Sydney Kingsford Smith

Mon 8/3

10:20 am-12:12 pm

1 stop18h 52m

$1,150
Quickest round-trip

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 9/7

7:20 am-6:50 pm

1 stop18h 30m

Sydney Kingsford Smith

Tue 9/15

8:45 pm-9:20 pm

1 stop17h 35m

$1,166

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 7/27

6:39 pm-6:55 am

1 stop19h 16m

Sydney Kingsford Smith

Fri 8/7

10:20 am-5:56 pm

1 stop24h 36m

$1,196

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 5/23

1:18 pm-6:55 am

2 stops24h 37m

Sydney Kingsford Smith

Sat 5/30

10:20 am-12:12 pm

1 stop18h 52m

$1,250

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 4/21

1:27 pm-6:55 am

1 stop24h 28m

Sydney Kingsford Smith

Tue 4/28

10:20 am-9:56 am

1 stop16h 36m

$1,375

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 5/25

6:39 pm-6:55 am

1 stop19h 16m

Sydney Kingsford Smith

Fri 5/29

10:20 am-5:56 pm

1 stop24h 36m

$1,456

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 5/7

10:37 am-6:55 am

1 stop27h 18m

Sydney Kingsford Smith

Mon 5/11

10:20 am-9:41 am

1 stop16h 21m

$1,456

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 21 resultsSorted by cheapest first
1
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3

Compare providers for flights from Ontario to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Sydney in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Sydney (average of $619). Flying from Ontario to Sydney in December is currently the most expensive (average of $795). 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Sydney?

    Airlines like Delta fly from Ontario to Sydney in about 31h 50m. The time it takes to get you to your destination can typically vary by up to . The distance between Ontario and Sydney is about 7534 mi.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Ontario to Sydney (average of $619). Flying from Ontario to Sydney in December is currently the most expensive (average of $795). 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Coogee
Manly

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