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$556+ Cheap flights from Ontario (ONT) to Sydney (SYD)

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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
May 17 — May 241
Sat 5/17
Sat 5/24
1 adult, Economy
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Cheap flight deals from Ontario to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Sydney (SYD). 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 May 12, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,043
(Delta)

One-way from

$556
(United Airlines)

Popular in

July

Cheapest in

April

Average price

$954
Provider with most accurate pricing for Ontario-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Ontario-Sydney Kingsford Smith flights.
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From Ontario to Sydney Kingsford Smith
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One-way flight from Ontario to Sydney Kingsford Smith
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Highest demand for flights based on searches. 8% potential increase in price ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Ontario to Sydney

Cheapest flights from Ontario to Sydney
Explore the most affordable flight options available from Ontario to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 12, 2025.

This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/156:00 amONT - SYD
2 stops31h 35mDelta
Fri 7/189:25 amSYD - ONT
2 stops31h 17mDelta
Deal found 5/12$1,043
This Alaska Airlines deal was found by Cheapflights users on 5/12. 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 8/169:00 amONT - SYD
1 stop17h 45mAlaska Airlines
Tue 11/189:40 pmSYD - ONT
1 stop19h 15mAlaska Airlines
Deal found 5/12$1,058
This SmartFares deal was found by Cheapflights users on 5/10. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2111:07 amONT - SYD
1 stop38h 38mHawaiian Airlines
Sun 11/29:40 pmSYD - ONT
1 stop19h 15mHawaiian Airlines
Deal found 5/10$1,063
This United Airlines deal was found by Cheapflights users on 5/12. 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 6/26:41 pmONT - SYD
1 stop19h 14mUnited Airlines
Wed 6/1810:20 amSYD - ONT
1 stop18h 54mUnited Airlines
Deal found 5/12$1,064
This American Airlines deal was found by Cheapflights users on 5/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/152:40 pmONT - SYD
1 stop23h 15mAmerican Airlines
Fri 7/1810:25 amSYD - ONT
1 stop25h 28mAmerican Airlines
Deal found 5/12$1,115
This Fiji Airways deal was found by Cheapflights users on 5/10. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/83:05 pmONT - SYD
2 stops26h 25mMultiple Airlines
Tue 11/252:10 pmSYD - ONT
2 stops26h 50mMultiple Airlines
Deal found 5/10$1,427

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Sydney 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 May 12, 2025.
Use the filters below to find and compare flights from Ontario to Sydney that are best for you.

Fly from

Ontario

Fly to

Sydney

Route

Depart

Return

Price

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/15

6:00 am-6:35 am

2 stops31h 35m

Sydney Kingsford Smith

Fri 7/18

9:25 am-11:42 pm

2 stops31h 17m

$1,043

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 8/16

9:00 am-7:45 pm

1 stop17h 45m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-9:55 pm

1 stop19h 15m

$1,058

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 10/21

11:07 am-7:45 pm

1 stop38h 38m

Sydney Kingsford Smith

Sun 11/2

9:40 pm-9:55 pm

1 stop19h 15m

$1,063

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 6/2

6:41 pm-6:55 am

1 stop19h 14m

Sydney Kingsford Smith

Wed 6/18

10:20 am-12:14 pm

1 stop18h 54m

$1,064

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 6/15

2:40 pm-6:55 am

1 stop23h 15m

Sydney Kingsford Smith

Fri 7/18

10:25 am-6:53 pm

1 stop25h 28m

$1,115

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 11/8

3:05 pm-12:30 pm

2 stops26h 25m

Sydney Kingsford Smith

Tue 11/25

2:10 pm-10:00 pm

2 stops26h 50m

$1,427

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 7/28

6:39 pm-6:55 am

1 stop19h 16m

$556

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 8/16

9:00 am-7:45 pm

1 stop17h 45m

$631

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 6/9

12:49 pm-6:55 am

1 stop25h 06m

$634

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 8/15

9:00 am-7:45 pm

1 stop17h 45m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

Showing 1-10 of 14 results
1
2

Compare providers for flights from Ontario to Sydney

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 Ontario to Sydney in May.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
ExpediaPrice Accuracy1 starTrust 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 Ontario-Sydney flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Sydney flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ontario-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Sydney flights, Cheapflights users trust AranGrant the most. AranGrant 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 Ontario-Sydney 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 Ontario to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Ontario 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 Ontario to Sydney

What is the cheapest month to book a flight from Ontario to Sydney?

Currently, February is the cheapest month in which you can book a flight from Ontario to Sydney (average of $1,043). Flying from Ontario to Sydney in December is currently the most expensive (average of $1,643). 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.

What is the cheapest time of day to fly from ONT to SYD?

Find hourly flight availability from Ontario to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 12, 2025.

One of the essential ways to save on airfare from Ontario to Sydney is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 26% on airfare.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. 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 Sydney. Reviews last updated May 12, 2025.
See what other customers who have flown with China Airlines, Alaska Airlines and Delta from Ontario to Sydney have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
732 reviews

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
China Airlines
8.3
Very good
732 reviews
China Airlines
8.3
Very good
732 reviews

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Alaska Airlines
8.0
Very good
10,000 reviews
China Airlines
8.3
Very good
732 reviews

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Delta
8.0
Very good
7,950 reviews
China Airlines
8.3
Very good
732 reviews

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
Hawaiian Airlines
7.9
Good
2,432 reviews
China Airlines
8.3
Very good
732 reviews

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver
United Airlines
7.4
Good
8,724 reviews
China Airlines
8.3
Very good
732 reviews

Boarding

8.3

Food

7.8

Comfort

8.0

Entertainment

8.0

Overall

8.3

Crew

8.5

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2025

YVR - TPE

I like the system, but the problem is the food , thre is no option, as a chef i don't recommend the food is worst we keep our hungry until taipe from vancouver

Related info for your journey

Find useful and relevant information for your journey from Ontario to Sydney. 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 Ontario to Sydney round-trip?

    Cheapflights users have booked flights from Ontario to Sydney round-trip from $1,043. Other airlines that can offer you cheap pricing are Alaska Airlines, from $1,058, and Hawaiian Airlines, from $1,063.

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

    $556 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 American Airlines, with prices starting from $631 and $634, respectively.

  • Can I find deals for flights from Ontario to Sydney that include hotel bookings?

    Yes. In addition to deals on Ontario to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Sydney.

  • Can I find deals for business class flights from Ontario to Sydney?

    Yes. Cheapflights offers flight deals from Ontario to Sydney 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 Ontario to Sydney?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Sydney (average of $1,043). Flying from Ontario to Sydney in December is currently the most expensive (average of $1,643). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Wollongong
Parramatta
Coogee
Manly

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Top 3 airlines flying from Ontario to Sydney

Discover the top 3 airlines that operate flights from Ontario to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$774Average$865FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$909Average$1,062FlexibilityNo cancel feeOn-time69%
Qantas AirwaysCheapest$1,042Average$1,107FlexibilityNo cancel feeOn-time74%

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