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$444+ 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
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 February 5, 2026.

This Alaska Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 8/138:45 pm
SYD
-
ONT
1 stop18h 35m
Multiple Airlines
Mon 8/177:50 am
ONT
-
SYD
1 stop18h 00m
Multiple Airlines
Deal found 2/3$747
This SmartFares deal was found by Cheapflights users on 2/3. 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.
Fri 2/279:40 pm
SYD
-
ONT
1 stop19h 35m
Multiple Airlines
Tue 3/38:41 am
ONT
-
SYD
1 stop40h 04m
Multiple Airlines
Deal found 2/3$798
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 8/138:45 pm
SYD
-
ONT
1 stop18h 35m
Multiple Airlines
Fri 8/218:00 am
ONT
-
SYD
1 stop17h 50m
Multiple Airlines
Deal found 2/3$800
This United Airlines deal was found by Cheapflights users on 2/4. 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 2/912:10 pm
SYD
-
ONT
1 stop18h 08m
United Airlines
Sun 2/226:37 pm
ONT
-
SYD
1 stop19h 38m
United Airlines
Deal found 2/4$828
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:50 am
SYD
-
ONT
2 stops43h 53m
United Airlines
Mon 2/231:45 pm
ONT
-
SYD
2 stops48h 30m
United Airlines
Deal found 2/2$829
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/212:10 pm
SYD
-
ONT
1 stop19h 28m
United Airlines
Sun 3/86:37 pm
ONT
-
SYD
1 stop20h 38m
United Airlines
Deal found 2/2$831
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Tue 2/242:00 pm
SYD
-
ONT
1 stop22h 41m
United Airlines
Tue 3/106:37 pm
ONT
-
SYD
1 stop20h 38m
United Airlines
Deal found 2/4$835
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Mon 3/212:10 pm
SYD
-
ONT
1 stop19h 28m
United Airlines
Thu 3/126:37 pm
ONT
-
SYD
1 stop20h 38m
United Airlines
Deal found 2/3$881
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/210:20 am
SYD
-
ONT
2 stops52h 01m
United Airlines
Fri 9/256:53 pm
ONT
-
SYD
1 stop19h 02m
United Airlines
Deal found 2/2$883
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Sat 2/2812:10 pm
SYD
-
ONT
1 stop19h 37m
United Airlines
Sun 3/155:15 am
ONT
-
SYD
2 stops34h 00m
United Airlines
Deal found 2/4$887
This United Airlines deal was found by Cheapflights users on 2/4. 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 2/92:00 pm
SYD
-
ONT
1 stop27h 53m
United Airlines
Fri 2/131:45 pm
ONT
-
SYD
2 stops46h 15m
United Airlines
Deal found 2/4$888

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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$798
(SmartFares)

One-way from

$444
(Kissandfly.com)

Popular in

December

Cheapest in

August

Average price

$768
Provider with most accurate pricing for Sydney Kingsford Smith-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sydney Kingsford Smith-Los Angeles 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 ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 5, 2026.
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 4/28

10:20 am-9:56 am

1 stop16h 36m

Ontario

Tue 5/12

6:59 pm-6:55 am

1 stop18h 56m

$829

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 4/15

10:20 am-12:14 pm

1 stop18h 54m

Ontario

Tue 5/12

6:59 pm-6:55 am

1 stop18h 56m

$831

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 3/26

12:10 pm-12:18 pm

1 stop18h 08m

Ontario

Sun 4/5

6:49 pm-6:55 am

1 stop19h 06m

$831

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 2/24

2:00 pm-5:41 pm

1 stop22h 41m

Ontario

Tue 3/10

6:37 pm-9:15 am

1 stop20h 38m

$835

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 6/10

10:20 am-12:20 pm

1 stop19h 00m

Ontario

Tue 6/30

6:53 pm-6:55 am

1 stop19h 02m

$835

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 8/4

10:20 am-9:40 pm

2 stops52h 20m

Ontario

Mon 8/31

5:00 am-6:55 am

2 stops32h 55m

$836

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 3/26

12:10 pm-12:18 pm

1 stop18h 08m

Ontario

Sun 4/26

6:49 pm-6:55 am

1 stop19h 06m

$836

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 5/5

10:20 am-9:41 am

1 stop16h 21m

Ontario

Tue 5/12

6:59 pm-6:55 am

1 stop18h 56m

$836

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 2/21

12:10 pm-5:41 pm

1 stop24h 31m

Ontario

Sat 2/28

1:45 pm-7:00 am

2 stops46h 15m

$881

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 2/26

11:50 am-9:59 pm

1 stop29h 09m

Ontario

Thu 3/5

6:00 am-7:00 am

1 stop30h 00m

$881

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 20 results
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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, November is the cheapest month in which you can book a flight from Sydney to Ontario (average of $565). Flying from Sydney to Ontario in December is currently the most expensive (average of $654). 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 23h 58m. Fly via United Airlines to get the fastest option. The distance between Sydney and Ontario is about 7534 mi.

  • 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, November is the cheapest month in which you can book a flight from Sydney to Ontario (average of $565). Flying from Sydney to Ontario in December is currently the most expensive (average of $654). 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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