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$648+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
nov 20 — nov 271
qui 11/20
qui 11/27
1 adult, Economy
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Cheap 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 outubro 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,390
(United Airlines)

One-way from

$648
(United Airlines)

Popular in

December

Cheapest in

July

Average price

$1,003
Provider with most accurate pricing for Los Angeles-Adelaide flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Adelaide flights.
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From Ontario to Adelaide
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One-way flight from Ontario to Adelaide
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Highest demand for flights based on searches. 17% potential increase in price ($263 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 outubro 21, 2025.

This United Airlines deal was found by Cheapflights users on 10/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 12/115:05 amONT - ADL
2 stops33h 55mUnited Airlines
ter 1/138:30 amADL - ONT
2 stops22h 14mUnited Airlines
Deal found 10/21$1,365
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 12/26:41 pmONT - ADL
2 stops24h 44mUnited Airlines
sex 12/126:10 amADL - ONT
2 stops24h 38mUnited Airlines
Deal found 10/20$1,390
This United Airlines deal was found by Cheapflights users on 10/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 12/91:50 pmONT - ADL
2 stops38h 10mUnited Airlines
sex 1/99:30 amADL - ONT
2 stops31h 53mUnited Airlines
Deal found 10/19$1,795
This oojo deal was found by Cheapflights users on 10/19. 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.
seg 11/36:00 amONT - ADL
3 stops55h 40mQatar Airways
qui 11/1312:35 pmADL - ONT
3 stops53h 27mQatar Airways
Deal found 10/19$1,836
This United Airlines deal was found by Cheapflights users on 10/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 11/146:38 pmONT - ADL
2 stops24h 47mUnited Airlines
qua 12/36:00 amADL - ONT
2 stops24h 47mUnited Airlines
Deal found 10/19$1,866
This United Airlines deal was found by Cheapflights users on 10/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 11/36:38 pmONT - ADL
2 stops27h 12mUnited Airlines
qui 11/136:10 amADL - ONT
2 stops24h 57mUnited Airlines
Deal found 10/19$1,974
This oojo deal was found by Cheapflights users on 10/19. 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.
sex 11/1411:59 amONT - ADL
2 stops34h 36mQatar Airways
qua 12/310:00 pmADL - ONT
2 stops39h 03mQatar Airways
Deal found 10/19$2,111
This oojo deal was found by Cheapflights users on 10/19. 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.
qua 12/316:00 amONT - ADL
2 stops40h 35mQatar Airways
sex 1/2310:00 pmADL - ONT
2 stops41h 06mQatar Airways
Deal found 10/19$2,221
This American Airlines deal was found by Cheapflights users on 10/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/812:46 pmONT - ADL
2 stops29h 44mAmerican Airlines
qua 1/141:40 pmADL - ONT
2 stops43h 08mAmerican Airlines
Deal found 10/21$2,327
This United Airlines deal was found by Cheapflights users on 10/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 12/151:50 pmONT - ADL
1 stop25h 10mUnited Airlines
seg 1/52:55 pmADL - ONT
1 stop26h 16mUnited Airlines
Deal found 10/18$5,928

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 outubro 21, 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

qui 12/11

5:05 am-9:30 am

2 stops33h 55m

Adelaide

ter 1/13

8:30 am-12:14 pm

2 stops22h 14m

$1,365

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

sex 12/5

6:41 pm-4:20 pm

2 stops27h 09m

Adelaide

sex 12/12

6:10 am-12:18 pm

2 stops24h 38m

$1,390

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

ter 12/2

6:41 pm-1:55 pm

2 stops24h 44m

Adelaide

sex 12/12

6:10 am-12:18 pm

2 stops24h 38m

$1,390

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

ter 12/9

1:50 pm-10:30 pm

2 stops38h 10m

Adelaide

sex 1/9

9:30 am-10:53 pm

2 stops31h 53m

$1,795

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

sex 11/14

6:38 pm-1:55 pm

2 stops24h 47m

Adelaide

qua 12/3

6:00 am-12:17 pm

2 stops24h 47m

$1,866

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

seg 11/3

6:38 pm-4:20 pm

2 stops27h 12m

Adelaide

qui 11/13

6:10 am-12:37 pm

2 stops24h 57m

$1,974

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

sex 11/14

11:59 am-5:05 pm

2 stops34h 36m

Adelaide

qua 12/3

10:00 pm-6:33 pm

2 stops39h 03m

$2,111

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

qua 12/31

6:00 am-5:05 pm

2 stops40h 35m

Adelaide

sex 1/23

10:00 pm-8:36 pm

2 stops41h 06m

$2,221

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

sex 1/9

6:39 pm-4:20 pm

2 stops27h 11m

Adelaide

dom 2/1

6:10 am-12:14 pm

2 stops24h 34m

$2,301

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

seg 12/8

12:46 pm-1:00 pm

2 stops29h 44m

Adelaide

qua 1/14

1:40 pm-2:18 pm

2 stops43h 08m

$2,327

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 16 results
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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, January is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $751). Flying from Ontario to Adelaide in June is currently the most expensive (average of $1,115). 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 33h 55m. United Airlines provides one of the quickest options available for as low as $1,365. 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, January is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $751). Flying from Ontario to Adelaide in June is currently the most expensive (average of $1,115). 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

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