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$504+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$812
(United Airlines)

One-way from

$504
(United Airlines)

Popular in

June

Cheapest in

August

Average price

$1,133
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 July 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 July 29, 2025.

This lol.travel deal was found by Cheapflights users on 7/29. 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 7/3110:20 amSYD - ONT
1 stop29h 32mUnited Airlines
Wed 8/131:19 pmONT - SYD
1 stop24h 36mUnited Airlines
Deal found 7/29$753
This Hawaiian Airlines deal was found by Cheapflights users on 7/29. 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.
Sun 12/79:40 pmSYD - ONT
1 stop19h 15mHawaiian Airlines
Sun 12/149:50 amONT - SYD
1 stop38h 55mHawaiian Airlines
Deal found 7/29$892
This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 8/199:40 pmSYD - ONT
2 stops30h 04mAlaska Airlines
Thu 9/118:35 amONT - SYD
1 stop18h 10mAlaska Airlines
Deal found 7/28$929

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 July 29, 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 8/12

10:20 am-8:54 pm

2 stops27h 34m

Ontario

Tue 8/19

6:50 pm-6:55 am

1 stop19h 05m

$812

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 12/7

9:40 pm-9:55 pm

1 stop19h 15m

Ontario

Sun 12/14

9:50 am-7:45 pm

1 stop38h 55m

$892

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 8/19

9:40 pm-10:44 am

2 stops30h 04m

Ontario

Thu 9/11

8:35 am-7:45 pm

1 stop18h 10m

$929

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 9/10

10:10 pm-6:40 pm

1 stop37h 30m

Ontario

Fri 9/19

12:10 am-10:45 am

1 stop41h 35m

$1,202

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 9/12

10:20 am-8:33 pm

1 stop27h 13m

$504

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 11/11

9:40 pm-5:14 pm

1 stop38h 34m

$524

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 9/19

4:20 pm-9:10 pm

1 stop21h 50m

$599

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 10/27

10:10 pm-5:50 pm

1 stop37h 40m

$732

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 11/14

9:40 pm-11:05 am

2 stops32h 25m

$882

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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 July 29, 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
754 reviews

Food

7.8

Comfort

8.0

Overall

8.3

Crew

8.5

Boarding

8.3

Entertainment

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
754 reviews
China Airlines
8.3
Very good
754 reviews

Food

7.8

Comfort

8.0

Overall

8.3

Crew

8.5

Boarding

8.3

Entertainment

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
754 reviews

Food

7.8

Comfort

8.0

Overall

8.3

Crew

8.5

Boarding

8.3

Entertainment

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
2,605 reviews
China Airlines
8.3
Very good
754 reviews

Food

7.8

Comfort

8.0

Overall

8.3

Crew

8.5

Boarding

8.3

Entertainment

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
8,896 reviews
China Airlines
8.3
Very good
754 reviews

Food

7.8

Comfort

8.0

Overall

8.3

Crew

8.5

Boarding

8.3

Entertainment

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 are the cheapest airlines flying 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 $812 on this airline. Additional options worth looking into are Hawaiian Airlines and Alaska Airlines, starting at $892 and $929 round-trip. Users have found that United Airlines is 17% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Sydney to Ontario one-way?

    $504 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Hawaiian Airlines and China Airlines, with prices starting from $524 and $732, respectively.

  • 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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