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$416+ 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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Find cheap flights from Sydney to Ontario with Cheapflights

1. Tell us where you want to go

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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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$687
(Alaska Airlines)

One-way from

$416
(Kissandfly.com)

Popular in

June

Cheapest in

September

Average price

$997
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 November 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 November 6, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 11/189:40 pmSYD - ONT
1 stop38h 34mAlaska Airlines
Tue 11/257:50 amONT - SYD
1 stop40h 55mAlaska Airlines
Deal found 11/5$687
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 11/119:40 pmSYD - ONT
1 stop38h 34mAlaska Airlines
Fri 11/149:47 amONT - SYD
1 stop38h 58mAlaska Airlines
Deal found 11/3$738
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Wed 11/1212:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Tue 11/186:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Deal found 11/5$742
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/1012:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Mon 11/246:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Deal found 11/4$747
This Kissandfly.com deal was found by Cheapflights users on 11/5. 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.
Tue 11/119:40 pmSYD - ONT
1 stop38h 34mHawaiian Airlines
Fri 11/149:47 amONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 11/5$772
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 11/79:40 pmSYD - ONT
1 stop38h 34mAlaska Airlines
Sun 11/99:47 amONT - SYD
1 stop38h 58mAlaska Airlines
Deal found 11/5$785
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/912:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Mon 11/246:38 pmONT - SYD
1 stop19h 37mUnited Airlines
Deal found 11/4$796
This SmartFares deal was found by Cheapflights users on 11/5. 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 12/249:40 pmSYD - ONT
1 stop19h 28mHawaiian Airlines
Thu 1/228:13 amONT - SYD
1 stop40h 32mHawaiian Airlines
Deal found 11/5$820
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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 12/69:40 pmSYD - ONT
1 stop17h 43mAlaska Airlines
Wed 12/248:00 amONT - SYD
1 stop40h 45mAlaska Airlines
Deal found 11/5$854

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 November 6, 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

Wed 11/26

12:10 pm-12:37 pm

1 stop19h 27m

Ontario

Mon 12/8

6:41 pm-9:15 am

1 stop19h 34m

$747

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 12/9

2:00 pm-12:17 pm

1 stop17h 17m

Ontario

Tue 12/16

6:00 am-7:00 am

1 stop30h 00m

$747

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 3/27

12:10 pm-12:17 pm

1 stop18h 07m

Ontario

Thu 4/30

6:53 pm-6:55 am

1 stop19h 02m

$845

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 2/1

9:40 pm-10:28 pm

1 stop19h 48m

Ontario

Fri 2/6

8:13 am-7:45 pm

1 stop40h 32m

$919

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 2/22

9:40 pm-9:55 pm

1 stop19h 15m

Ontario

Wed 3/4

9:50 am-7:45 pm

1 stop38h 55m

$1,013

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 12/9

9:40 pm-8:23 pm

1 stop17h 43m

Ontario

Wed 1/14

8:13 am-7:45 pm

1 stop40h 32m

$1,022

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 12/11

9:40 pm-8:23 pm

1 stop17h 43m

Ontario

Wed 1/21

8:13 am-7:45 pm

1 stop40h 32m

$1,022

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 2/24

2:00 pm-12:38 pm

1 stop17h 38m

Ontario

Tue 3/3

6:00 am-7:00 am

1 stop30h 00m

$1,096

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 12/4

12:10 pm-12:18 pm

1 stop19h 08m

Ontario

Sun 12/14

6:41 pm-9:15 am

1 stop19h 34m

$1,102

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 12/11

9:40 pm-8:23 pm

1 stop17h 43m

Ontario

Tue 1/13

8:13 am-7:45 pm

1 stop40h 32m

$1,135

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

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 November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Sydney-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, January is the cheapest month in which you can book a flight from Sydney to Ontario (average of $453). Flying from Sydney to Ontario in July is currently the most expensive (average of $641). 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 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 19h 27m. Fly via United Airlines or Alaska 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, January is the cheapest month in which you can book a flight from Sydney to Ontario (average of $453). Flying from Sydney to Ontario in July is currently the most expensive (average of $641). 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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