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Cheap flights from Sydney to Ontario from $641

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 25/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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 31 October 2025.

Round-trip from

$1,141

One-way from

$641

Popular in

June

Cheapest in

September

Average price

$1,640
United Airlines
  • United Airlines
  • 11/11-2/12
  • 2 total stops
  • 39h 01m total
  • Sydney to Ontario
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Hawaiian Airlines
  • Hawaiian Airlines
  • 25/12
  • 1 total stop
  • 19h 28m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($188 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($58 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find flight deals from Sydney to Ontario

Enter your travel dates to find the best prices.

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 31 October 2025.

Sun 2/1121:40SYD - ONT
1 stop38h 34mHawaiian Airlines
Wed 12/1109:47ONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 29/10$1,106
Tue 4/1121:40SYD - ONT
1 stop38h 34mHawaiian Airlines
Wed 19/1109:47ONT - SYD
1 stop38h 58mHawaiian Airlines
Deal found 30/10$1,113
Mon 3/1112:10SYD - ONT
1 stop19h 27mUnited Airlines
Sun 16/1118:38ONT - SYD
1 stop19h 37mUnited Airlines
Deal found 30/10$1,139
Mon 3/1112:10SYD - ONT
1 stop19h 27mUnited Airlines
Mon 17/1118:38ONT - SYD
1 stop19h 37mUnited Airlines
Deal found 31/10$1,141
Tue 4/1112:10SYD - ONT
2 stops43h 21mUnited Airlines
Wed 19/1106:05ONT - SYD
1 stop29h 55mUnited Airlines
Deal found 30/10$1,145
Sun 2/1121:40SYD - ONT
1 stop38h 34mAlaska Airlines
Sun 9/1109:47ONT - SYD
1 stop38h 58mAlaska Airlines
Deal found 30/10$1,198
Mon 3/1112:10SYD - ONT
2 stops43h 21mUnited Airlines
Fri 7/1113:29ONT - SYD
2 stops46h 31mUnited Airlines
Deal found 31/10$1,215
Fri 7/1112:10SYD - ONT
1 stop19h 27mUnited Airlines
Sat 29/1121:35ONT - SYD
2 stops38h 25mUnited Airlines
Deal found 29/10$1,217
Mon 8/1212:10SYD - ONT
1 stop19h 07mUnited Airlines
Sat 3/118:39ONT - SYD
1 stop19h 36mUnited Airlines
Deal found 30/10$1,221
Thu 25/1221:40SYD - ONT
1 stop19h 28mAlaska Airlines
Thu 15/108:13ONT - SYD
1 stop40h 32mAlaska Airlines
Deal found 30/10$1,223

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 31 October 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

Mon 3/11

12:10-12:37

1 stop19h 27m

Ontario

Sun 16/11

18:38-09:15

1 stop19h 37m

$1,139

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 4/11

12:10-12:31

2 stops43h 21m

Ontario

Wed 19/11

05:05-07:00

2 stops30h 55m

$1,145

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 8/12

12:10-12:17

1 stop19h 07m

Ontario

Wed 21/1

13:53-06:20

1 stop21h 27m

$1,145

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 8/11

11:50-21:49

1 stop28h 59m

Ontario

Sat 29/11

21:35-09:15

2 stops40h 40m

$1,217

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 7/11

11:50-20:44

2 stops27h 54m

Ontario

Sat 29/11

21:35-07:00

2 stops38h 25m

$1,217

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 22/11

12:10-17:34

1 stop24h 24m

Ontario

Sat 29/11

21:35-07:00

2 stops38h 25m

$1,221

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 18/11

12:10-12:37

1 stop19h 27m

Ontario

Fri 5/12

05:05-06:20

2 stops30h 15m

$1,221

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 25/12

21:40-22:08

1 stop19h 28m

$641

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 28/1

21:40-22:28

1 stop19h 48m

$880

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 10/3

21:40-21:55

1 stop18h 15m

$880

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 17 results
1
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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 return 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, January is the cheapest month in which you can book a flight from Sydney to Ontario (average of $690). Flying from Sydney to Ontario in July is currently the most expensive (average of $976). 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 31 October 2025.
Read reviews from past customers who have flown with United Airlines from Sydney to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,998 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews
Check prices

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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.

  • How long is the flight from Sydney to Ontario?

    United Airlines can get you from Sydney to Ontario in just under 19h 27m. Your travel time can differ by up to . There are 12125 km between Sydney and Ontario.

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

    United Airlines, at $1,215, was found to be the cheapest airline from Sydney to Ontario.. United Airlines is currently priced 18% below the average price you’ll pay for this route.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from Sydney to Ontario (average of $690). Flying from Sydney to Ontario in July is currently the most expensive (average of $976). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Sydney to Ontario

Discover the top airline that operate flights from Sydney to Ontario. 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 647,157 searches. Data last updated 31 October 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,215Average$1,670FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Sydney to Ontario?

Cheapflights makes it easy to find Sydney to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Sydney to Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals from Sydney to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Sydney to Ontario with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Sydney to Ontario, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Sydney to Ontario become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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