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$427+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
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 julio 1, 2025.

Round-trip from

$872
(United Airlines)

One-way from

$427
(American Airlines)

Popular in

October

Cheapest in

April

Average price

$1,233
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. 7% potential increase in price ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 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 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 julio 1, 2025.

This American Airlines deal was found by Cheapflights users on 7/1. 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.
mar. 10/2810:06 amONT - SYD
2 stops28h 54mAmerican Airlines
jue. 11/135:45 pmSYD - ONT
2 stops23h 15mAmerican Airlines
Deal found 7/1$939
This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/46:38 pmONT - SYD
1 stop19h 37mUnited Airlines
mar. 11/2512:10 pmSYD - ONT
1 stop19h 27mUnited Airlines
Deal found 6/29$983
This Alaska Airlines deal was found by Cheapflights users on 6/30. 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.
mié. 10/2211:07 amONT - SYD
1 stop38h 38mAlaska Airlines
sáb. 11/229:40 pmSYD - ONT
1 stop19h 15mAlaska Airlines
Deal found 6/30$1,076
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/149:00 amONT - SYD
1 stop36h 40mMultiple Airlines
jue. 8/213:10 pmSYD - ONT
2 stops43h 30mMultiple Airlines
Deal found 6/30$1,126
This KAYAK deal was found by Cheapflights users on 6/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/1411:07 amONT - SYD
1 stop38h 38mHawaiian Airlines
mar. 10/289:40 pmSYD - ONT
1 stop37h 34mHawaiian Airlines
Deal found 6/29$1,157

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 julio 1, 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

mar. 10/28

10:06 am-9:00 am

2 stops28h 54m

Sydney Kingsford Smith

jue. 11/13

5:45 pm-10:00 pm

2 stops23h 15m

$939

OntarioSydney

ONT - SYD

ONTSYD

Ontario

mar. 11/4

6:38 pm-9:15 am

1 stop19h 37m

Sydney Kingsford Smith

mar. 11/25

12:10 pm-12:37 pm

1 stop19h 27m

$983

OntarioSydney

ONT - SYD

ONTSYD

Ontario

mié. 10/22

11:07 am-7:45 pm

1 stop38h 38m

Sydney Kingsford Smith

sáb. 11/22

9:40 pm-9:55 pm

1 stop19h 15m

$1,076

OntarioSydney

ONT - SYD

ONTSYD

Ontario

jue. 8/14

9:00 am-2:40 pm

1 stop36h 40m

Sydney Kingsford Smith

jue. 8/21

3:10 pm-5:40 pm

2 stops43h 30m

$1,126

OntarioSydney

ONT - SYD

ONTSYD

Ontario

mar. 10/14

11:07 am-7:45 pm

1 stop38h 38m

Sydney Kingsford Smith

mar. 10/28

9:40 pm-5:14 pm

1 stop37h 34m

$1,157

OntarioSydney

ONT - SYD

ONTSYD

Ontario

vie. 8/15

12:22 pm-6:55 am

2 stops25h 33m

$427

OntarioSydney

ONT - SYD

ONTSYD

Ontario

mar. 8/12

1:19 pm-6:55 am

1 stop24h 36m

$617

OntarioSydney

ONT - SYD

ONTSYD

Ontario

jue. 10/23

11:07 am-7:45 pm

1 stop38h 38m

$622

OntarioSydney

ONT - SYD

ONTSYD

Ontario

mar. 9/30

10:09 am-7:45 pm

1 stop40h 36m

$699

OntarioSydney

ONT - SYD

ONTSYD

Ontario

sáb. 12/6

12:53 pm-12:30 pm

2 stops28h 37m

$824

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 $1,040). Flying from Ontario to Sydney in December is currently the most expensive (average of $1,630). 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 julio 1, 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.

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 julio 1, 2025.
Read through reviews of airlines operating flights from Ontario to Sydney, such as China Airlines, Alaska Airlines, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
China Airlines
8.3
Very good
747 reviews

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Comfort

8.0

Overall

8.3

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
747 reviews
China Airlines
8.3
Very good
747 reviews

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Comfort

8.0

Overall

8.3

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
747 reviews

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Comfort

8.0

Overall

8.3

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
7.8
Good
2,539 reviews
China Airlines
8.3
Very good
747 reviews

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Comfort

8.0

Overall

8.3

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
8,858 reviews
China Airlines
8.3
Very good
747 reviews

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Comfort

8.0

Overall

8.3

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
American Airlines
7.2
Good
10,000 reviews
China Airlines
8.3
Very good
747 reviews

Crew

8.5

Entertainment

8.0

Boarding

8.3

Food

7.8

Comfort

8.0

Overall

8.3

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 $872. Other airlines that can offer you cheap pricing are American Airlines, from $939, and Alaska Airlines, from $1,076. United Airlines is 20% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $427 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from $617 and $631, 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 $1,040). Flying from Ontario to Sydney in December is currently the most expensive (average of $1,630). 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
Manly
Coogee

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Top airline flying from Ontario to Sydney

Discover the top airline 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 julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,127FlexibilityNo cancel feeOn-time69%

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