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Cheap flights from Sydney to Ontario from $607

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
20 Aug — 27 Aug1
1 adult

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 15 August 2025.

Round-trip from

$1,392

One-way from

$607

Popular in

June

Cheapest in

August

Average price

$1,264
United Airlines
  • United Airlines
  • 27/9-4/10
  • 4 total stops
  • 51h 44m total
  • Sydney to Ontario
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15/10
  • 15/10
  • 1 total stop
  • 21h 17m total
  • Sydney to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($182 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 August 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 15 August 2025.

Mon 18/810:20SYD - ONT
1 stop29h 32mUnited Airlines
Sun 31/813:42ONT - SYD
1 stop24h 13mUnited Airlines
Deal found 15/8$1,309
Sat 16/810:20SYD - ONT
1 stop18h 54mUnited Airlines
Sat 30/818:50ONT - SYD
1 stop19h 05mUnited Airlines
Deal found 14/8$1,320
Sat 27/910:20SYD - ONT
2 stops27h 04mUnited Airlines
Sat 4/1013:15ONT - SYD
2 stops24h 40mUnited Airlines
Deal found 13/8$1,392
Sun 2/1112:10SYD - ONT
2 stops27h 34mUnited Airlines
Fri 14/1105:05ONT - SYD
2 stops30h 55mUnited Airlines
Deal found 14/8$1,398
Mon 18/810:20SYD - ONT
1 stop24h 23mUnited Airlines
Fri 22/818:38ONT - SYD
2 stops43h 17mUnited Airlines
Deal found 13/8$1,549
Fri 29/810:20SYD - ONT
1 stop18h 53mUnited Airlines
Tue 2/918:50ONT - SYD
1 stop19h 05mUnited Airlines
Deal found 15/8$1,550
Sat 30/810:20SYD - ONT
1 stop18h 53mUnited Airlines
Wed 3/918:50ONT - SYD
1 stop19h 05mUnited Airlines
Deal found 13/8$1,552

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 15 August 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

Fri 31/10

12:10-20:44

2 stops26h 34m

Ontario

Fri 14/11

05:05-07:00

2 stops30h 55m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 1/11

11:50-21:37

1 stop27h 47m

Ontario

Fri 14/11

06:05-07:00

1 stop29h 55m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 30/8

10:20-12:13

1 stop18h 53m

Ontario

Sat 6/9

13:15-06:55

2 stops24h 40m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 14/9

10:20-12:13

1 stop18h 53m

Ontario

Tue 23/9

18:50-06:55

1 stop19h 05m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 14/10

11:20-12:13

1 stop18h 53m

Ontario

Wed 22/10

18:36-07:55

1 stop19h 19m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 15/10

11:20-12:13

1 stop18h 53m

Ontario

Wed 22/10

18:36-07:55

1 stop19h 19m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sat 27/9

10:20-20:24

2 stops27h 04m

Ontario

Sat 4/10

13:15-07:55

2 stops24h 40m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 25/11

12:10-12:37

1 stop19h 27m

Ontario

Wed 31/12

18:39-09:15

1 stop19h 36m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 31/8

10:20-12:13

1 stop18h 53m

Ontario

Tue 14/10

16:15-07:55

2 stops45h 40m

$1,392

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 18/9

10:20-12:13

1 stop18h 53m

Ontario

Wed 1/10

18:36-06:55

1 stop19h 19m

$1,392

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 21 results
1
2
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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’s the top stopover airport for flights from Sydney to Ontario?

Share of one-stop return flights from Sydney to Ontario chosen by Cheapflights users in the past 12 months, using the same stopover each way.

San Francisco (SFO) – chosen by Cheapflights users on 89% of one-stop itineraries from Sydney to Ontario on Cheapflights.

What’s the cheapest stopover airport for flights from Sydney to Ontario?

Average return fare for one-stop flights from Sydney to Ontario, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

San Francisco (SFO) is the most affordable one-stop option, with an average return flight price of $1,618.

What’s the fastest stopover option from Sydney to Ontario?

Shortest average travel time for one-stop one-way flights from Sydney to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Honolulu (HNL) have the shortest average one-way travel time for one-stop routes: 18h 02m.

Which airport typically offers the quickest stopover for flights from Sydney to Ontario?

Average stopover duration for one-stop one-way flights from Sydney to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Honolulu (HNL) offer the fastest connection on this route, with an average stopover time of 2h 08m.

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 15 August 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
8,915 reviews
Check prices

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,915 reviews
United Airlines
7.4
Good
8,915 reviews
Check prices

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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

    United Airlines, at $1,226, was found to be the cheapest airline from Sydney to Ontario.. United Airlines is currently priced 19% 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 15 August 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,226Average$1,702FlexibilityNo 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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