Find flights
When to book
Airlines
FAQs

Cheap flights from Australia to Ontario from $783

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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
11 Dec — 18 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Australia to Ontario

Enter your travel dates to find the best prices.

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 11 November 2025.

Sun 14/1213:00MEL - ONT
2 stops51h 49mUnited Airlines
Fri 23/106:00ONT - MEL
2 stops57h 00mUnited Airlines
Deal found 8/11$1,328
Thu 25/1213:00MEL - ONT
1 stop23h 51mUnited Airlines
Thu 1/108:11ONT - MEL
1 stop30h 49mUnited Airlines
Deal found 9/11$1,331
Mon 15/1213:00MEL - ONT
1 stop18h 17mUnited Airlines
Mon 29/1218:39ONT - MEL
1 stop20h 21mUnited Airlines
Deal found 8/11$1,334
Mon 15/1213:00MEL - ONT
1 stop18h 17mUnited Airlines
Tue 30/1218:39ONT - MEL
1 stop20h 21mUnited Airlines
Deal found 9/11$1,336
Sun 14/1213:00MEL - ONT
1 stop28h 49mLufthansa
Tue 30/1218:39ONT - MEL
1 stop20h 21mLufthansa
Deal found 9/11$1,375
Mon 17/1111:40BNE - ONT
1 stop18h 57mUnited Airlines
Sun 30/1120:38ONT - BNE
1 stop16h 52mUnited Airlines
Deal found 9/11$1,380
Fri 14/1111:40BNE - ONT
1 stop18h 57mUnited Airlines
Fri 28/1120:38ONT - BNE
1 stop16h 52mUnited Airlines
Deal found 9/11$1,385
Fri 21/1121:40SYD - ONT
1 stop17h 51mAlaska Airlines
Fri 26/1208:00ONT - SYD
1 stop40h 45mAlaska Airlines
Deal found 9/11$1,640
Sun 7/1213:00MEL - ONT
1 stop18h 18mUnited Airlines
Sun 14/1218:41ONT - MEL
2 stops23h 54mUnited Airlines
Deal found 7/11$1,665
Fri 26/1213:00MEL - ONT
2 stops42h 38mUnited Airlines
Sat 10/113:53ONT - MEL
2 stops25h 42mUnited Airlines
Deal found 8/11$1,670
Sun 16/1122:10SYD - ONT
1 stop37h 40mChina Airlines
Fri 28/1122:50ONT - SYD
1 stop42h 25mChina Airlines
Deal found 8/11$1,807
Fri 28/1111:40BNE - ONT
1 stop18h 57mUnited Airlines
Wed 21/113:53ONT - BNE
1 stop23h 37mUnited Airlines
Deal found 9/11$1,846

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 11 November 2025.

Round-trip from

$1,328

One-way from

$783

Popular in

December

Cheapest in

February

Average price

$1,241
United Airlines
  • United Airlines
  • 14/12-23/1
  • 3 total stops
  • 85h 49m total
  • Australia to Ontario
Search Deals
Hawaiian Airlines
  • Hawaiian Airlines
  • 5/12
  • 1 total stop
  • 17h 43m total
  • Australia to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($202 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($54 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 11 November 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

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 19/12

13:00-21:07

2 stops27h 07m

Ontario

Thu 1/1

18:39-10:00

1 stop20h 21m

$1,331

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 25/12

13:00-10:01

1 stop40h 01m

Ontario

Thu 1/1

08:11-10:00

1 stop30h 49m

$1,331

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Mon 15/12

13:00-12:17

1 stop18h 17m

Ontario

Tue 30/12

18:39-10:00

1 stop20h 21m

$1,331

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Thu 4/12

13:00-12:18

1 stop18h 18m

Ontario

Sun 15/2

18:37-10:00

1 stop20h 23m

$1,331

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Fri 19/12

13:00-22:41

1 stop28h 41m

Ontario

Tue 6/1

06:00-10:00

2 stops33h 00m

$1,331

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Wed 11/2

13:00-17:43

1 stop23h 43m

Ontario

Tue 17/2

13:45-10:00

2 stops49h 15m

$1,337

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Mon 24/11

11:40-12:37

1 stop18h 57m

Ontario

Mon 8/12

13:34-07:30

2 stops23h 56m

$1,377

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Sun 30/11

11:40-12:37

1 stop18h 57m

Ontario

Sun 7/12

13:34-07:30

2 stops23h 56m

$1,377

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Wed 26/11

11:40-17:34

1 stop23h 54m

Ontario

Wed 10/12

18:41-07:30

1 stop18h 49m

$1,380

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Fri 28/11

11:40-19:41

1 stop26h 01m

Ontario

Wed 21/1

06:00-07:30

2 stops55h 30m

$1,380

Flights are sorted by cheapest return flights first.

Deals found on 9/11

Showing 1-10 of 60 results
1
2
3
...
6

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 month to book a flight from Australia to Ontario?

Currently, December is the cheapest month in which you can book a flight from Australia to Ontario (average of $755). Flying from Australia to Ontario in August is currently the most expensive (average of $945). 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 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 11 November 2025.

A simple way to save on the total cost of your ticket is to fly from Australia to Ontario at midday. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight in the evening.

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 11 November 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.
United Airlines
7.4
Good
9,012 reviews
Check prices

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

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
9,012 reviews
United Airlines
7.4
Good
9,012 reviews
Check prices

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Boarding

7.7

Crew

8.1

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?

    United Airlines, Alaska Airlines, and China Airlines can get you from Australia to Ontario in just under 19h 48m. Your travel time can differ by up to 20h 12m. 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 cheapest airlines to fly from Australia to Ontario one-way?

    $783 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from $824 and $878, respectively.

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

    While some choose either Melbourne - Ontario or Brisbane - Ontario, Sydney Kingsford Smith - Ontario is the most popular route 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.

  • What is the cheapest month to book a flight from Australia to Ontario?

    Currently, December is the cheapest month in which you can book a flight from Australia to Ontario (average of $755). Flying from Australia to Ontario in August is currently the most expensive (average of $945). 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.

Alternative routes for Australia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Sydney to Los Angeles flights
Melbourne to Los Angeles flights
Melbourne to San Francisco flights
Brisbane to Los Angeles flights
Sydney to San Francisco flights
Sydney to Ontario flights
Sydney to Las Vegas flights
Brisbane to San Francisco flights
Melbourne to Las Vegas flights
Perth to Los Angeles flights
Sydney to Long Beach flights
Brisbane to Las Vegas flights
Sydney to San Jose flights
Brisbane to Ontario flights
Avalon to San Francisco flights
Melbourne to San Jose flights
Adelaide to Los Angeles flights
Melbourne to San Diego flights
Sydney to Oakland flights
Adelaide to San Francisco flights
Perth to San Francisco flights
Darwin to Los Angeles flights
Sydney to Santa Ana flights
Perth to Las Vegas flights
Perth to Ontario flights
Melbourne to Burbank flights
Melbourne to Long Beach flights
Adelaide to Las Vegas flights
Melbourne to Santa Ana flights
Coolangatta to San Francisco flights
Sydney to Burbank flights
Perth to San Diego flights
Perth to San Jose flights
Melbourne to Oakland flights
Maroochydore to San Francisco flights
Brisbane to San Jose flights
Hobart to Los Angeles flights
Canberra to Las Vegas flights
Melbourne to Sacramento flights
Perth to Sacramento flights
Brisbane to Oakland flights
Brisbane to San Diego flights
Sydney to San Diego flights
Coolangatta to Los Angeles flights

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 11 November 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,068Average$1,764FlexibilityNo 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 Australia to Ontario?

Cheapflights makes it easy to find Australia 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 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?

Not ready to book yet? You can track prices for flights from Australia to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.