Find flights
When to book
Airlines
FAQs

Cheap flights from Australia to Ontario from $781

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
SYD — ONT
23 Jul — 30 Jul1
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 18 July 2025.

Round-trip from

$1,237

One-way from

$781

Popular in

December

Cheapest in

May

Average price

$1,475
United Airlines
  • United Airlines
  • 8/9-21/9
  • 2 total stops
  • 50h 48m total
  • Australia to Ontario
Search Deals
United Airlines
  • United Airlines
  • 16/9
  • 1 total stop
  • 27h 13m total
  • Australia to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($297 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($75 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 18 July 2025.

Mon 8/910:20SYD - ONT
1 stop18h 53mUnited Airlines
Sun 21/906:00ONT - SYD
1 stop31h 55mUnited Airlines
Deal found 17/7$1,237
Sat 15/1113:00MEL - ONT
1 stop23h 34mUnited Airlines
Tue 20/106:00ONT - MEL
1 stop33h 00mUnited Airlines
Deal found 18/7$1,399
Mon 3/1111:40BNE - ONT
1 stop18h 57mUnited Airlines
Sat 15/1113:29ONT - BNE
2 stops24h 01mUnited Airlines
Deal found 17/7$1,407
Sun 19/1021:40SYD - ONT
2 stops32h 57mAlaska Airlines
Tue 9/1209:50ONT - SYD
1 stop38h 55mAlaska Airlines
Deal found 18/7$1,593
Wed 3/921:50MEL - ONT
1 stop37h 50mChina Airlines
Sun 14/900:45ONT - MEL
1 stop40h 55mChina Airlines
Deal found 16/7$1,769
Mon 22/906:05ADL - ONT
2 stops22h 38mUnited Airlines
Tue 21/1018:36ONT - ADL
2 stops25h 09mUnited Airlines
Deal found 17/7$1,771
Tue 5/822:50BNE - ONT
1 stop36h 50mChina Airlines
Mon 18/800:45ONT - BNE
1 stop40h 50mChina Airlines
Deal found 17/7$1,779
Sun 12/1001:25MEL - ONT
2 stops34h 35mMultiple Airlines
Fri 24/1000:10ONT - MEL
2 stops29h 55mMultiple Airlines
Deal found 16/7$1,785
Thu 4/906:00OOL - ONT
2 stops23h 13mUnited Airlines
Thu 18/918:50ONT - OOL
2 stops22h 50mUnited Airlines
Deal found 17/7$1,803
Mon 8/922:10SYD - ONT
1 stop37h 30mChina Airlines
Thu 18/900:10ONT - SYD
1 stop41h 35mChina Airlines
Deal found 18/7$1,806
Mon 1/923:45PER - ONT
2 stops27h 28mUnited Airlines
Mon 15/913:42ONT - PER
2 stops33h 58mUnited Airlines
Deal found 18/7$1,882
Sat 13/1221:40SYD - ONT
1 stop19h 15mHawaiian Airlines
Fri 16/109:50ONT - SYD
1 stop38h 55mHawaiian Airlines
Deal found 18/7$1,896

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 18 July 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

Mon 8/9

10:20-12:13

1 stop18h 53m

Ontario

Sun 21/9

06:00-06:55

1 stop31h 55m

$1,237

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sat 15/11

13:00-17:34

1 stop23h 34m

Ontario

Tue 20/1

06:00-10:00

1 stop33h 00m

$1,399

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Mon 3/11

11:40-12:37

1 stop18h 57m

Ontario

Sat 15/11

13:29-07:30

2 stops24h 01m

$1,407

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Sun 17/8

21:40-11:05

2 stops30h 25m

Ontario

Thu 21/8

08:35-19:45

1 stop18h 10m

$1,600

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Wed 3/9

21:50-18:40

1 stop37h 50m

Ontario

Sun 14/9

00:45-10:40

1 stop40h 55m

$1,769

AdelaideOntario

ADL - ONT

ADLONT

Adelaide

Mon 22/9

06:05-12:13

2 stops22h 38m

Ontario

Tue 21/10

18:36-13:15

2 stops25h 09m

$1,771

BrisbaneOntario

BNE - ONT

BNEONT

Brisbane

Tue 5/8

22:50-18:40

1 stop36h 50m

Ontario

Mon 18/8

00:45-10:35

1 stop40h 50m

$1,779

MelbourneOntario

MEL - ONT

MELONT

Melbourne

Sun 12/10

01:25-18:00

2 stops34h 35m

Ontario

Fri 24/10

00:10-00:05

2 stops29h 55m

$1,785

CoolangattaOntario

OOL - ONT

OOLONT

Coolangatta Gold Coast

Thu 4/9

06:00-12:13

2 stops23h 13m

Ontario

Thu 18/9

18:50-10:40

2 stops22h 50m

$1,803

SydneyOntario

SYD - ONT

SYDONT

Sydney Kingsford Smith

Mon 8/9

22:10-18:40

1 stop37h 30m

Ontario

Thu 18/9

00:10-10:45

1 stop41h 35m

$1,806

Flights are sorted by cheapest return flights first.

Deals found on 18/7

Showing 1-10 of 33 results
1
2
3
4

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 18 July 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 18 July 2025.
Check out reviews from past customers who have flown with Japan Airlines, China Airlines, andAlaska 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.
Japan Airlines
8.3
Very Good
1,515 reviews
Check prices

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Japan Airlines
8.3
Very Good
1,515 reviews
Japan Airlines
8.3
Very Good
1,515 reviews
Check prices

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
China Airlines
8.2
Very Good
745 reviews
Japan Airlines
8.3
Very Good
1,515 reviews
Check prices

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Alaska Airlines
8.0
Very Good
10,000 reviews
Japan Airlines
8.3
Very Good
1,515 reviews
Check prices

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Hawaiian Airlines
7.8
Good
2,583 reviews
Japan Airlines
8.3
Very Good
1,515 reviews
Check prices

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
LATAM Airlines
7.5
Good
1,810 reviews
Japan Airlines
8.3
Very Good
1,515 reviews
Check prices

Crew

8.7

Entertainment

7.8

Food

7.7

Boarding

8.4

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,June 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.

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.

  • What are the cheapest airlines to fly from Australia to Ontario one-way?

    $781 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on China Airlines and Alaska Airlines, with prices starting from $1,128 and $1,669, 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.

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
Brisbane to Los Angeles flights
Sydney to San Francisco flights
Melbourne to San Francisco flights
Sydney to Ontario flights
Perth to Los Angeles flights
Melbourne to Santa Ana flights
Brisbane to San Francisco flights
Melbourne to Burbank flights
Brisbane to Ontario flights
Sydney to Santa Ana flights
Sydney to Burbank flights
Sydney to Las Vegas flights
Sydney to San Jose flights
Adelaide to Los Angeles flights
Sydney to Oakland flights
Sydney to Long Beach flights
Adelaide to San Francisco flights
Perth to Ontario flights
Melbourne to San Jose flights
Perth to San Francisco flights
Avalon to San Francisco flights
Melbourne to Las Vegas flights
Perth to Las Vegas flights
Adelaide to San Jose flights
Brisbane to Las Vegas flights
Sydney to Sacramento flights
Melbourne to Oakland flights
Sydney to San Diego flights
Brisbane to San Jose flights
Adelaide to Las Vegas flights
Canberra to Los Angeles flights
Coolangatta to Los Angeles flights
Brisbane to San Diego flights
Darwin to Los Angeles flights
Brisbane to Reno flights
Hobart to Los Angeles flights
Melbourne to San Diego flights
Cairns to Los Angeles flights
Darwin to San Francisco 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 18 July 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,075Average$1,771FlexibilityNo 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.