Cheap flights from Australia to Ontario from $777

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

$1,054

One-way from

$777

Popular in

December

Cheapest in

February

Average price

$1,283
Alaska Airlines
  • Alaska Airlines
  • 28/10-5/11
  • 2 total stops
  • 76h 34m total
  • Australia to Ontario
Delta
  • Delta
  • 30/10
  • 2 total stops
  • 24h 13m total
  • Australia to Ontario
Highest demand for flights based on searches. 12% potential increase in price ($277 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease ($72 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 15 September 2025.

Tue 28/1021:40SYD - ONT
1 stop37h 34mAlaska Airlines
Wed 5/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 15/9$1,054
Thu 2/1010:30BNE - ONT
1 stop18h 43mUnited Airlines
Wed 15/1018:36ONT - BNE
1 stop18h 54mUnited Airlines
Deal found 14/9$1,126
Mon 6/1011:20SYD - ONT
1 stop18h 53mUnited Airlines
Sun 19/1018:36ONT - SYD
1 stop19h 19mUnited Airlines
Deal found 15/9$1,136
Wed 29/1011:50SYD - ONT
1 stop27h 59mUnited Airlines
Wed 5/1118:38ONT - SYD
1 stop19h 37mUnited Airlines
Deal found 14/9$1,138
Fri 14/1121:40SYD - ONT
1 stop38h 34mAlaska Airlines
Tue 18/1109:45ONT - SYD
1 stop39h 00mAlaska Airlines
Deal found 15/9$1,168
Mon 3/1113:00MEL - ONT
1 stop18h 37mUnited Airlines
Mon 17/1118:38ONT - MEL
1 stop20h 22mUnited Airlines
Deal found 14/9$1,181
Mon 20/1011:55MEL - ONT
1 stop18h 18mUnited Airlines
Mon 3/1118:38ONT - MEL
1 stop20h 22mUnited Airlines
Deal found 13/9$1,198
Tue 18/1111:40BNE - ONT
1 stop23h 54mUnited Airlines
Mon 29/1210:42ONT - BNE
1 stop26h 48mUnited Airlines
Deal found 15/9$1,198
Tue 28/1012:00MEL - ONT
1 stop23h 34mUnited Airlines
Wed 5/1118:38ONT - MEL
1 stop20h 22mUnited Airlines
Deal found 15/9$1,199
Tue 30/910:55MEL - ONT
1 stop28h 57mUnited Airlines
Mon 20/1013:53ONT - MEL
1 stop25h 22mUnited Airlines
Deal found 14/9$1,201
Sat 4/1010:20SYD - ONT
2 stops52h 04mUnited Airlines
Sun 28/1205:05ONT - SYD
2 stops30h 15mUnited Airlines
Deal found 15/9$1,213
Wed 29/1010:40BNE - ONT
1 stop29h 11mUnited Airlines
Wed 5/1118:38ONT - BNE
1 stop18h 52mUnited Airlines
Deal found 14/9$1,216

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 15 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

Sun 15/2

21:40-21:55

1 stop19h 15m

Ontario

Sun 15/3

09:50-19:45

1 stop39h 55m

$1,103

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 6/10

11:20-12:13

1 stop18h 53m

Ontario

Sun 19/10

18:36-07:55

1 stop19h 19m

$1,136

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 12/3

12:10-12:33

2 stops42h 23m

Ontario

Mon 16/3

05:40-09:15

2 stops57h 35m

$1,138

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Tue 11/11

12:10-12:31

2 stops43h 21m

Ontario

Sun 11/1

06:00-06:20

1 stop29h 20m

$1,138

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 29/10

12:10-22:51

1 stop28h 41m

Ontario

Sun 2/11

05:05-09:15

2 stops57h 10m

$1,138

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 23/10

11:20-17:40

1 stop24h 20m

Ontario

Tue 9/12

13:50-09:15

1 stop24h 25m

$1,138

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Wed 12/11

12:10-21:49

2 stops28h 39m

Ontario

Sun 11/1

06:00-06:20

1 stop29h 20m

$1,138

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Thu 13/11

12:10-17:34

1 stop24h 24m

Ontario

Mon 17/11

13:29-07:00

2 stops46h 31m

$1,138

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Tue 14/10

10:30-12:13

1 stop18h 43m

Ontario

Sat 18/10

06:00-06:30

2 stops55h 30m

$1,198

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Thu 30/10

10:40-12:37

1 stop18h 57m

Ontario

Mon 3/11

13:29-07:30

2 stops48h 01m

$1,198

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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 15 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 15 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.

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 2025

FRA - SFO

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

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

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 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?

    Hawaiian Airlines and United Airlines can get you from Australia to Ontario in just under 18h 53m. Your travel time can differ by up to 22m. The distance between Australia and Ontario is about 12125 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,046Average$1,734FlexibilityNo 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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Why should you use Cheapflights to find cheap flight tickets from Australia to Ontario?

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.

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

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