HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Adelaide

$653+ Cheap flights from Ontario (ONT) to Adelaide (ADL)

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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Adelaide with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Adelaide

Cheapest flights from Ontario to Adelaide
Explore the most affordable flight options available from Ontario to Adelaide. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This oojo deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amONT - ADL
2 stops40h 35mQatar Airways
Fri 1/210:00 pmADL - ONT
2 stops38h 47mQatar Airways
Deal found 12/27$3,423
This oojo deal was found by Cheapflights users on 12/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:45 pmONT - ADL
2 stops57h 50mQatar Airways
Sun 1/1110:00 pmADL - ONT
2 stops44h 26mQatar Airways
Deal found 12/25$13,699

Find flight deals from Ontario to Adelaide

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Adelaide (ADL). 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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,205
(Alaska Airlines)

One-way from

$653
(United Airlines)

Popular in

January

Cheapest in

July

Average price

$1,398
Provider with most accurate pricing for Los Angeles-Adelaide flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Adelaide flights.
Search Deals
From Ontario to Adelaide
Search Deals
One-way flight from Ontario to Adelaide
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($166 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Adelaide 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 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Ontario to Adelaide that are best for you.

Fly from

Ontario

Fly to

Adelaide

Route

Depart

Return

Price

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 5/14

9:30 am-10:35 pm

2 stops44h 35m

Adelaide

Thu 6/4

8:50 am-10:07 pm

2 stops29h 47m

$1,205

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sun 5/17

9:30 am-10:35 pm

2 stops44h 35m

Adelaide

Sat 6/6

8:50 am-10:07 pm

2 stops29h 47m

$1,326

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Mon 2/16

6:37 pm-9:30 am

1 stop20h 23m

Adelaide

Thu 2/19

8:30 am-5:41 pm

2 stops27h 41m

$1,374

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sun 3/29

8:32 am-10:35 pm

2 stops44h 33m

Adelaide

Sun 4/5

12:40 pm-10:59 pm

2 stops26h 49m

$1,426

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Mon 5/18

6:54 pm-1:45 pm

2 stops26h 21m

Adelaide

Sat 6/6

6:05 am-12:20 pm

2 stops22h 45m

$1,611

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Mon 3/30

10:33 am-4:50 pm

2 stops36h 47m

Adelaide

Mon 4/6

9:40 pm-6:13 pm

2 stops37h 03m

$2,726

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sat 3/14

1:50 pm-8:30 am

2 stops25h 10m

$653

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 2/19

1:45 pm-9:30 am

2 stops25h 15m

$653

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Fri 2/20

1:45 pm-9:30 am

2 stops49h 15m

$676

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sat 1/17

1:53 pm-9:30 am

1 stop25h 07m

$682

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 12 results
1
2

Best time to book a flight from Ontario to Adelaide

Have a flexible travel schedule? Discover the best time to fly to Adelaide from Ontario with our price prediction graph.
Estimated round-trip 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 Ontario to Adelaide

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

Currently, February is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $694). Flying from Ontario to Adelaide in June is currently the most expensive (average of $1,122). 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Adelaide. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Adelaide?

    A quick flight from Ontario to Adelaide can take about 20h 23m. United Airlines provides one of the quickest options available for as low as $1,374. The distance from Ontario to Adelaide is about 8211 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Adelaide 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 Ontario to Adelaide?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $694). Flying from Ontario to Adelaide in June is currently the most expensive (average of $1,122). 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

Traveling to a place near Adelaide?

Book flights to Adelaide if you plan to visit one of these locations
Glenelg

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.

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.