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$451+ 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SYD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$931
(Tripair)

One-way from

$464
(United Airlines)

Popular in

October

Cheapest in

April

Average price

$1,062
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 June 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 June 12, 2025.

This Tripair deal was found by Cheapflights users on 6/12. 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 Tripair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/26:31 pmONT - SYD
2 stops43h 24mUnited Airlines
Fri 8/1510:20 amSYD - ONT
1 stop18h 54mUnited Airlines
Deal found 6/12$931
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/158:15 amONT - SYD
1 stop29h 40mAmerican Airlines
Fri 7/1810:25 amSYD - ONT
1 stop28h 45mAmerican Airlines
Deal found 6/11$939
This Delta deal was found by Cheapflights users on 6/10. 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 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 stops24h 04mDelta
Deal found 6/10$940
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/29:50 amONT - SYD
1 stop38h 55mAlaska Airlines
Sat 3/79:40 pmSYD - ONT
1 stop19h 15mAlaska Airlines
Deal found 6/10$1,076

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 June 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

Sat 8/2

6:31 pm-6:55 am

2 stops43h 24m

Sydney Kingsford Smith

Fri 8/15

10:20 am-12:14 pm

1 stop18h 54m

$931

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sat 7/26

1:15 pm-6:35 am

2 stops24h 20m

Sydney Kingsford Smith

Sat 8/2

9:25 am-11:17 pm

2 stops30h 52m

$1,003

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Tue 12/2

9:50 am-7:45 pm

1 stop38h 55m

Sydney Kingsford Smith

Tue 3/3

9:40 pm-9:55 pm

1 stop19h 15m

$1,076

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Sun 12/7

10:57 am-6:10 am

2 stops24h 13m

Sydney Kingsford Smith

Mon 12/15

2:20 pm-5:53 pm

2 stops22h 33m

$1,332

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 9/19

6:50 pm-6:55 am

1 stop19h 05m

$451

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 6/30

11:59 pm-8:45 am

2 stops39h 46m

$504

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 8/28

8:35 am-7:45 pm

1 stop18h 10m

$611

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Fri 8/8

9:00 am-7:45 pm

1 stop17h 45m

$729

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Thu 6/19

6:25 am-2:40 pm

3 stops39h 15m

$862

OntarioSydney

ONT - SYD

ONTSYD

Ontario

Mon 9/8

12:45 am-10:45 am

1 stop41h 00m

$1,091

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 11 results
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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, March is the cheapest month in which you can book a flight from Ontario to Sydney (average of $1,041). Flying from Ontario to Sydney in December is currently the most expensive (average of $1,635). 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 June 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 June 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
738 reviews

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

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
738 reviews
China Airlines
8.3
Very good
738 reviews

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

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
738 reviews

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

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
738 reviews

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

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
2,494 reviews
China Airlines
8.3
Very good
738 reviews

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

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
Qatar Airways
7.4
Good
3,584 reviews
China Airlines
8.3
Very good
738 reviews

Food

7.8

Boarding

8.3

Entertainment

8.0

Overall

8.3

Comfort

8.0

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 $931. Other airlines that can offer you cheap pricing are American Airlines, from $939, and Delta, from $940. United Airlines is 15% 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?

    $464 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 American Airlines and Hawaiian Airlines, with prices starting from $504 and $611, 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, March is the cheapest month in which you can book a flight from Ontario to Sydney (average of $1,041). Flying from Ontario to Sydney in December is currently the most expensive (average of $1,635). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$926Average$1,127FlexibilityNo cancel feeOn-time69%

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