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$385+ Cheap flights from Sydney (SYD) to Ontario (ONT)

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
1 adult, Economy
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Find cheap flights from Sydney to Ontario with Cheapflights

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Cheap flight deals from Sydney to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Sydney (SYD) to Ontario (ONT). 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 September 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$826
(SmartFares)

One-way from

$385
(Trip.com)

Popular in

June

Cheapest in

September

Average price

$782
Provider with most accurate pricing for Sydney Kingsford Smith-Ontario flight deals.
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Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Ontario flights.
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From Sydney Kingsford Smith to Ontario
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One-way flight from Sydney Kingsford Smith to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($81 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Sydney to Ontario

Cheapest flights from Sydney to Ontario
Explore the most affordable flight options available from Sydney to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 9/25. 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 11/49:40 pmSYD - ONT
1 stop38h 34mHawaiian Airlines
Tue 11/119:47 amONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 9/25$850
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Thu 11/69:40 pmSYD - ONT
1 stop38h 34mAlaska Airlines
Sun 11/99:47 amONT - SYD
1 stop38h 58mAlaska Airlines
Deal found 9/25$851
This lol.travel deal was found by Cheapflights users on 9/25. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1311:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Sun 10/261:40 pmONT - SYD
1 stop25h 35mUnited Airlines
Deal found 9/25$856
This lol.travel deal was found by Cheapflights users on 9/24. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/611:20 amSYD - ONT
1 stop29h 32mUnited Airlines
Wed 10/226:27 pmONT - SYD
2 stops43h 28mUnited Airlines
Deal found 9/24$858
This United Airlines deal was found by Cheapflights users on 9/25. 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 9/2910:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Wed 10/16:36 pmONT - SYD
1 stop19h 19mUnited Airlines
Deal found 9/25$866
This United Airlines deal was found by Cheapflights users on 9/25. 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.
Sat 11/1511:50 amSYD - ONT
1 stop28h 59mUnited Airlines
Sat 11/221:29 pmONT - SYD
2 stops46h 31mUnited Airlines
Deal found 9/25$917
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/511:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Tue 10/216:36 pmONT - SYD
1 stop19h 19mUnited Airlines
Deal found 9/24$919
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/1611:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Wed 10/296:38 pmONT - SYD
1 stop20h 37mUnited Airlines
Deal found 9/25$926
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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 12/29:40 pmSYD - ONT
2 stops32h 39mAlaska Airlines
Mon 12/298:00 amONT - SYD
1 stop40h 45mAlaska Airlines
Deal found 9/24$938
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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 10/179:40 pmSYD - ONT
2 stops44h 23mAlaska Airlines
Fri 10/319:45 amONT - SYD
1 stop40h 00mAlaska Airlines
Deal found 9/25$944

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sydney 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 2,558,603 searches. Data last updated September 25, 2025.
Use the filters below to find and compare flights from Sydney to Ontario that are best for you.

Fly from

Sydney

Fly to

Ontario

Route

Depart

Return

Price

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 3/5

9:40 pm-9:55 pm

1 stop19h 15m

Ontario

Wed 3/25

9:50 am-7:45 pm

1 stop39h 55m

$851

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 3/8

9:40 pm-9:55 pm

1 stop18h 15m

Ontario

Wed 3/25

9:50 am-7:45 pm

1 stop39h 55m

$851

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 10/15

11:20 am-12:13 pm

1 stop18h 53m

Ontario

Thu 10/23

6:27 pm-7:00 am

2 stops66h 33m

$917

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 10/31

12:10 pm-9:49 pm

2 stops27h 39m

Ontario

Thu 11/6

1:29 pm-7:00 am

2 stops46h 31m

$917

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 10/17

11:20 am-12:13 pm

1 stop18h 53m

Ontario

Fri 10/31

6:38 pm-9:15 am

1 stop20h 37m

$917

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 11/15

11:50 am-9:49 pm

1 stop28h 59m

Ontario

Sat 11/22

1:29 pm-7:00 am

2 stops46h 31m

$917

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 11/6

9:40 pm-11:32 pm

2 stops44h 52m

Ontario

Sun 11/9

9:47 am-7:45 pm

1 stop38h 58m

$945

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 3/12

11:50 am-12:33 pm

2 stops42h 43m

Ontario

Mon 3/16

6:02 am-7:00 am

1 stop30h 58m

$1,020

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 3/4

10:10 pm-4:50 pm

1 stop37h 40m

Ontario

Tue 3/24

11:50 pm-12:15 pm

1 stop42h 25m

$1,202

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 11/9

10:40 am-11:52 pm

2 stops32h 12m

$514

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

Showing 1-10 of 21 results
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Compare providers for flights from Sydney to Ontario

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 Sydney to Ontario in September.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 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 Sydney-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sydney-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sydney-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sydney-Ontario 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 Sydney-Ontario 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 Sydney to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Sydney to Ontario (average of $246). Flying from Sydney to Ontario in March is currently the most expensive (average of $328). 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.

How much does it cost to fly round-trip from Sydney to Ontario?

Related info for your journey

Find useful and relevant information for your journey from Sydney to Ontario. 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 Sydney to Ontario?

    There are many flights that can get you from Sydney to Ontario in 18h 53m. Fly via Alaska Airlines or United Airlines to get the fastest option. The distance between Sydney and Ontario is about 7534 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Sydney to Ontario (average of $246). Flying from Sydney to Ontario in March is currently the most expensive (average of $328). 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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