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$675+ 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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Jan 24 — Jan 311
Sat 1/24
Sat 1/31
1 adult, Economy
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Cheap 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 December 25, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/259:40 pmSYD - ONT
1 stop19h 28mMultiple Airlines
Sat 12/278:00 amONT - SYD
1 stop40h 45mMultiple Airlines
Deal found 12/24$1,470
This Jetabroad deal was found by Cheapflights users on 12/24. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:40 pmSYD - ONT
1 stop19h 28mHawaiian Airlines
Sat 12/278:00 amONT - SYD
1 stop40h 45mHawaiian Airlines
Deal found 12/24$1,492
This United Airlines deal was found by Cheapflights users on 12/23. 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.
Tue 12/3012:10 pmSYD - ONT
1 stop16h 51mUnited Airlines
Tue 1/66:32 pmONT - SYD
1 stop19h 43mUnited Airlines
Deal found 12/23$1,577
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/242:00 pmSYD - ONT
1 stop23h 10mUnited Airlines
Sun 12/286:39 pmONT - SYD
1 stop19h 36mUnited Airlines
Deal found 12/23$1,578
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Mon 12/2912:10 pmSYD - ONT
1 stop16h 51mUnited Airlines
Tue 1/131:53 pmONT - SYD
1 stop21h 27mUnited Airlines
Deal found 12/24$1,587
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/2712:10 pmSYD - ONT
1 stop16h 49mUnited Airlines
Mon 12/296:39 pmONT - SYD
1 stop19h 36mUnited Airlines
Deal found 12/23$1,627
This United Airlines deal was found by Cheapflights users on 12/24. 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 12/2812:10 pmSYD - ONT
1 stop16h 51mUnited Airlines
Tue 12/306:39 pmONT - SYD
1 stop19h 36mUnited Airlines
Deal found 12/24$1,638
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/252:00 pmSYD - ONT
1 stop22h 51mUnited Airlines
Fri 12/266:39 pmONT - SYD
1 stop19h 36mUnited Airlines
Deal found 12/24$1,643
This United Airlines deal was found by Cheapflights users on 12/23. 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 12/2712:10 pmSYD - ONT
1 stop16h 49mUnited Airlines
Sat 1/36:39 pmONT - SYD
1 stop19h 36mUnited Airlines
Deal found 12/23$1,677
This United Airlines deal was found by Cheapflights users on 12/24. 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 12/282:00 pmSYD - ONT
2 stops26h 07mUnited Airlines
Wed 1/141:24 pmONT - SYD
2 stops46h 36mUnited Airlines
Deal found 12/24$1,687
This Alaska Airlines deal was found by Cheapflights users on 12/24. 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.
Sun 12/289:40 pmSYD - ONT
1 stop19h 28mMultiple Airlines
Wed 1/148:13 amONT - SYD
1 stop40h 32mMultiple Airlines
Deal found 12/24$1,694

Find 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 December 25, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$934
(SmartFares)

One-way from

$675
(United Airlines)

Popular in

June

Cheapest in

September

Average price

$1,065
Provider with most accurate pricing for Sydney Kingsford Smith-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Ontario flights.
Search Deals
From Sydney Kingsford Smith to Ontario
Search Deals
One-way flight from Sydney Kingsford Smith to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 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

Tue 2/3

9:40 pm-10:28 pm

1 stop19h 48m

Ontario

Wed 2/11

8:13 am-7:45 pm

1 stop40h 32m

$934

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 2/2

12:10 pm-11:18 am

1 stop18h 08m

Ontario

Mon 2/9

1:53 pm-6:20 am

1 stop21h 27m

$1,042

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 4/18

8:45 pm-10:59 pm

1 stop19h 14m

Ontario

Wed 5/13

9:30 am-6:50 pm

1 stop40h 20m

$1,052

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 1/15

2:00 pm-5:43 pm

1 stop22h 43m

Ontario

Wed 1/28

1:53 pm-6:20 am

1 stop21h 27m

$1,063

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 4/18

10:20 am-10:08 am

1 stop16h 48m

Ontario

Wed 5/13

6:54 pm-6:55 am

1 stop19h 01m

$1,069

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 6/7

8:45 pm-10:07 pm

1 stop18h 22m

Ontario

Thu 6/25

7:50 am-6:50 pm

1 stop18h 00m

$1,082

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 6/2

8:45 pm-10:07 pm

1 stop18h 22m

Ontario

Thu 6/25

7:50 am-6:50 pm

1 stop18h 00m

$1,082

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 2/12

9:40 pm-10:15 pm

1 stop19h 35m

Ontario

Tue 2/24

6:14 am-7:45 pm

2 stops42h 31m

$1,089

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 3/13

9:40 pm-8:55 pm

1 stop17h 15m

Ontario

Tue 3/17

8:45 am-7:45 pm

1 stop41h 00m

$1,092

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 1/26

12:10 pm-11:18 am

1 stop18h 08m

Ontario

Mon 2/9

1:53 pm-6:20 am

1 stop21h 27m

$1,101

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 19 results
1
2
  • 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, December is the cheapest month in which you can book a flight from Sydney to Ontario (average of $485). Flying from Sydney to Ontario in August is currently the most expensive (average of $625). 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 18h 08m. Fly via Hawaiian Airlines, United Airlines, or Lufthansa 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, December is the cheapest month in which you can book a flight from Sydney to Ontario (average of $485). Flying from Sydney to Ontario in August is currently the most expensive (average of $625). 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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