Cheap flights from Australia to Ontario from $716

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 19/9. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
7 Sep — 14 Sep1
1 adult

Cheap flight deals from Australia to Ontario

Keep the following information in mind while searching for Australia to Ontario flight deals. Data was last updated 2 September 2025.

Round-trip from

$1,317

One-way from

$716

Popular in

December

Cheapest in

May

Average price

$1,329
United Airlines
  • United Airlines
  • 17/9-20/9
  • 3 total stops
  • 67h 33m total
  • Australia to Ontario
19/9
  • 19/9
  • 1 total stop
  • 21h 50m total
  • Australia to Ontario
Highest demand for flights based on searches. 13% potential increase in price ($305 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease ($80 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Australia to Ontario

Cheapest flights from Australia to Ontario
Explore the most affordable flight options available from Australia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 September 2025.

Mon 22/910:55MEL - ONT
1 stop23h 42mUnited Airlines
Mon 13/1018:36ONT - MEL
1 stop20h 39mUnited Airlines
Deal found 31/8$1,305
Mon 24/1112:10SYD - ONT
1 stop29h 41mUnited Airlines
Tue 6/105:05ONT - SYD
2 stops33h 10mUnited Airlines
Deal found 30/8$1,315
Thu 4/910:20SYD - ONT
1 stop18h 53mUnited Airlines
Mon 8/918:50ONT - SYD
1 stop19h 05mUnited Airlines
Deal found 1/9$1,317
Mon 8/910:20SYD - ONT
2 stops24h 09mUnited Airlines
Sat 13/913:15ONT - SYD
2 stops48h 40mUnited Airlines
Deal found 2/9$1,318
Fri 17/1017:20SYD - ONT
1 stop21h 17mMultiple Airlines
Tue 21/1011:07ONT - SYD
1 stop34h 33mMultiple Airlines
Deal found 1/9$1,320
Thu 16/1011:55MEL - ONT
1 stop18h 18mUnited Airlines
Fri 31/1018:38ONT - MEL
1 stop20h 22mUnited Airlines
Deal found 30/8$1,344
Tue 2/910:20SYD - ONT
1 stop24h 17mUnited Airlines
Fri 12/918:38ONT - SYD
2 stops43h 17mUnited Airlines
Deal found 31/8$1,355
Fri 5/910:20SYD - ONT
1 stop18h 53mUnited Airlines
Tue 16/905:10ONT - SYD
2 stops32h 45mUnited Airlines
Deal found 1/9$1,357
Fri 19/910:20SYD - ONT
2 stops28h 05mUnited Airlines
Sun 28/920:16ONT - SYD
1 stop17h 39mUnited Airlines
Deal found 2/9$1,358
Wed 17/910:55MEL - ONT
1 stop26h 38mUnited Airlines
Mon 13/1018:36ONT - MEL
1 stop20h 39mUnited Airlines
Deal found 1/9$1,384
Tue 9/910:55MEL - ONT
1 stop18h 18mUnited Airlines
Tue 16/913:15ONT - MEL
2 stops26h 00mUnited Airlines
Deal found 1/9$1,386
Thu 30/1021:40SYD - ONT
1 stop37h 34mHawaiian Airlines
Thu 6/1109:45ONT - SYD
1 stop39h 00mHawaiian Airlines
Deal found 1/9$1,389

Cheapflights Fare Finder

 
Customise your flight search to find flights from Australia 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 2 September 2025.
Use the filters below to find and compare flights from Australia to Ontario that are best for you.

Fly from

Australia

Fly to

Ontario

Route

Depart

Return

Price

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 17/9

10:20-17:29

2 stops24h 09m

Ontario

Sat 20/9

13:15-06:55

2 stops48h 40m

$1,317

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 23/9

10:20-17:37

1 stop24h 17m

Ontario

Sat 27/9

13:15-06:55

2 stops48h 40m

$1,318

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 17/10

17:20-20:37

1 stop21h 17m

Ontario

Tue 21/10

11:07-15:40

1 stop34h 33m

$1,320

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Fri 19/9

10:20-21:25

2 stops28h 05m

Ontario

Sun 28/9

20:16-06:55

1 stop17h 39m

$1,358

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 7/2

13:00-12:14

1 stop18h 14m

Ontario

Sun 22/2

15:30-10:00

1 stop23h 30m

$1,366

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 5/2

21:40-21:55

1 stop19h 15m

Ontario

Tue 17/2

09:50-19:45

1 stop38h 55m

$1,369

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 27/11

13:00-12:33

2 stops42h 33m

Ontario

Fri 5/12

18:41-10:00

1 stop20h 19m

$1,380

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sun 19/10

11:55-12:13

1 stop18h 18m

Ontario

Mon 3/11

18:38-10:00

1 stop20h 22m

$1,380

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Tue 30/9

10:55-20:24

2 stops26h 29m

Ontario

Sun 19/10

13:53-09:15

1 stop25h 22m

$1,380

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 13/11

13:00-17:34

1 stop23h 34m

Ontario

Mon 24/11

18:38-10:00

1 stop20h 22m

$1,380

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 60 results
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Best time to book a flight from Australia to Ontario

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

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

Find hourly flight availability from Australia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 September 2025.

When flying from Australia to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 2 September 2025.
Check out reviews from past customers who have flown with United Airlines from Australia to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

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.

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

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 Australia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Ontario from Australia?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Australia. Ontario is conveniently located just 4.9 km from Ontario’s city centre.

  • How long is the flight from Australia to Ontario?

    United Airlines can get you from Australia to Ontario in just under 24h 09m. Your travel time can differ by up to . The distance between Australia and Ontario is about 12125 km.

  • What are the most popular routes from Australia to Ontario?

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Australia 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

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Top airline flying from Australia to Ontario

Discover the top airline that operate flights from Australia 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 2 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,069Average$1,760FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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

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By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario from Australia.

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

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

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