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$359+ 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
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
1 adult, Economy
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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 August 11, 2025.

Round-trip from

$908
(United Airlines)

One-way from

$359
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$823
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 ($77 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 11, 2025.

This lol.travel deal was found by Cheapflights users on 8/10. 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.
Thu 8/1410:20 amSYD - ONT
1 stop24h 23mUnited Airlines
Sat 8/306:50 pmONT - SYD
1 stop19h 05mUnited Airlines
Deal found 8/10$844
This United Airlines deal was found by Cheapflights users on 8/11. 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 8/1610:20 amSYD - ONT
1 stop24h 38mUnited Airlines
Sat 8/231:19 pmONT - SYD
2 stops48h 36mUnited Airlines
Deal found 8/11$908
This United Airlines deal was found by Cheapflights users on 8/10. 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 8/2710:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Sun 8/316:50 pmONT - SYD
1 stop19h 05mUnited Airlines
Deal found 8/10$1,007
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Fri 9/510:20 amSYD - ONT
1 stop18h 53mUnited Airlines
Mon 9/81:42 pmONT - SYD
1 stop24h 13mUnited Airlines
Deal found 8/8$1,008

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 August 11, 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 8/26

10:20 am-5:37 pm

1 stop24h 17m

Ontario

Tue 9/30

4:15 pm-6:55 am

2 stops45h 40m

$908

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 8/27

10:20 am-12:13 pm

1 stop18h 53m

Ontario

Sun 8/31

6:50 pm-6:55 am

1 stop19h 05m

$1,007

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 9/5

10:20 am-12:13 pm

1 stop18h 53m

Ontario

Mon 9/8

5:10 am-6:55 am

2 stops32h 45m

$1,008

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 9/29

10:20 am-12:51 pm

2 stops43h 31m

Ontario

Fri 10/3

6:27 pm-6:55 am

2 stops43h 28m

$1,010

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 11/1

9:40 pm-6:14 pm

1 stop38h 34m

Ontario

Fri 11/14

9:45 am-7:45 pm

1 stop39h 00m

$1,020

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 10/28

9:40 pm-5:14 pm

1 stop37h 34m

Ontario

Sun 11/30

8:00 am-7:45 pm

1 stop40h 45m

$1,067

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 10/21

9:40 pm-12:37 pm

2 stops32h 57m

Ontario

Tue 12/9

9:50 am-7:45 pm

1 stop38h 55m

$1,083

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 11/8

9:40 pm-5:14 pm

1 stop38h 34m

Ontario

Wed 11/12

9:45 am-7:45 pm

1 stop39h 00m

$1,085

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 10/21

9:40 pm-12:37 pm

2 stops32h 57m

Ontario

Fri 12/12

9:50 am-7:45 pm

1 stop38h 55m

$1,094

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 11/18

9:40 pm-5:14 pm

1 stop38h 34m

Ontario

Sun 12/14

9:50 am-7:45 pm

1 stop38h 55m

$1,097

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 20 results
1
2

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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated August 11, 2025.
Peruse reviews from past customers who have flown with China Airlines, Alaska Airlines, and Hawaiian Airlines from Sydney to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
760 reviews

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
China Airlines
8.3
Very good
760 reviews
China Airlines
8.3
Very good
760 reviews

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Alaska Airlines
8.0
Very good
10,000 reviews
China Airlines
8.3
Very good
760 reviews

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Hawaiian Airlines
7.8
Good
2,640 reviews
China Airlines
8.3
Very good
760 reviews

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
Qatar Airways
7.4
Good
3,604 reviews
China Airlines
8.3
Very good
760 reviews

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.
United Airlines
7.4
Good
8,920 reviews
China Airlines
8.3
Very good
760 reviews

Boarding

8.3

Entertainment

8.0

Crew

8.5

Food

7.8

Overall

8.3

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Jul 2025

SFO - TPE

Bad News - The flight was delayed and it was due to ground crew issues but the staff were moving things along. The seat size was cramp and i am a lean person. The attendant kept asking me in Chinese when i already stated i don’t speak the language. The food was bad. The taste, aroma, consistent of mush. Even a cafeteria lady can cook better food. Kudos - the pilot made up for lost time to the best of his ability. He made sure that the flight was smooth even though there was occasional turbulence. The landing was great.

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.

  • What is the cheapest airline to fly from Sydney to Ontario round-trip?

    Our cheapest airline available from Sydney to Ontario is United Airlines. Our recent data shows that you can find tickets from as low as $908 on this airline. Users have found that United Airlines is 7% cheaper than the other options available to this destination.

  • 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.

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