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$1,024+ 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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,364
(United Airlines)

One-way from

$1,024
(oojo)

Popular in

December

Cheapest in

July

Average price

$1,152
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. 13% potential increase in price ($191 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/116:41 pmONT - ADL
1 stop20h 19mUnited Airlines
Mon 1/122:55 pmADL - ONT
1 stop21h 18mUnited Airlines
Deal found 11/5$1,364
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/116:41 pmONT - ADL
1 stop20h 19mUnited Airlines
Sat 1/102:55 pmADL - ONT
1 stop26h 28mUnited Airlines
Deal found 11/5$1,367
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/116:41 pmONT - ADL
1 stop20h 19mUnited Airlines
Sat 3/281:55 pmADL - ONT
2 stops24h 20mUnited Airlines
Deal found 11/5$1,372
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/116:41 pmONT - ADL
1 stop20h 19mUnited Airlines
Sun 1/116:10 amADL - ONT
2 stops30h 03mUnited Airlines
Deal found 11/5$1,375
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Fri 12/266:04 amONT - ADL
2 stops56h 56mUnited Airlines
Mon 1/122:55 pmADL - ONT
2 stops25h 33mUnited Airlines
Deal found 11/6$1,462
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/111:50 pmONT - ADL
1 stop25h 10mUnited Airlines
Fri 1/98:30 amADL - ONT
2 stops32h 53mUnited Airlines
Deal found 11/5$1,599
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Sat 12/136:41 pmONT - ADL
1 stop20h 19mUnited Airlines
Sat 1/102:55 pmADL - ONT
1 stop21h 26mUnited Airlines
Deal found 11/6$2,311
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Fri 12/125:05 amONT - ADL
2 stops57h 55mUnited Airlines
Sat 1/102:55 pmADL - ONT
2 stops24h 33mUnited Airlines
Deal found 11/6$2,338

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 November 6, 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 12/11

6:41 pm-9:30 am

1 stop20h 19m

Adelaide

Mon 1/12

2:55 pm-5:43 pm

1 stop21h 18m

$1,364

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 12/11

6:41 pm-9:30 am

1 stop20h 19m

Adelaide

Sat 1/10

2:55 pm-10:53 pm

1 stop26h 28m

$1,367

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 12/11

6:41 pm-9:30 am

1 stop20h 19m

Adelaide

Sat 3/28

1:55 pm-8:45 pm

2 stops24h 20m

$1,372

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 12/11

6:41 pm-9:30 am

1 stop20h 19m

Adelaide

Sun 1/11

6:10 am-5:43 pm

2 stops30h 03m

$1,375

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Fri 12/26

6:04 am-9:30 am

2 stops56h 56m

Adelaide

Mon 1/12

2:55 pm-5:43 pm

1 stop21h 18m

$1,462

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Thu 12/11

1:50 pm-9:30 am

1 stop25h 10m

Adelaide

Fri 1/9

8:30 am-10:53 pm

2 stops32h 53m

$1,599

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sat 12/13

1:50 pm-9:30 am

1 stop25h 10m

Adelaide

Sat 1/10

2:55 pm-10:53 pm

1 stop26h 28m

$2,311

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sat 1/10

11:53 am-5:05 pm

2 stops34h 42m

$1,024

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sat 1/10

1:24 pm-9:30 am

2 stops25h 36m

$1,048

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Mon 11/24

6:38 pm-2:10 pm

2 stops25h 02m

$1,125

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 12 results
1
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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, October is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $756). 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 20h 19m. United Airlines provides one of the quickest options available for as low as $1,364. 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, October is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $756). 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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