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$649+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
nov. 22 — nov. 291
sáb. 11/22
sáb. 11/29
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 octubre 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,311
(United Airlines)

One-way from

$700
(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 octubre 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/23. 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.
dom. 12/76:41 pmONT - ADL
2 stops24h 59mUnited Airlines
dom. 12/146:00 amADL - ONT
2 stops24h 48mUnited Airlines
Deal found 10/23$1,224
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.
lun. 12/296:39 pmONT - ADL
1 stop20h 21mUnited Airlines
lun. 1/122:55 pmADL - ONT
1 stop26h 28mUnited Airlines
Deal found 10/21$1,311
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.
jue. 12/115:05 amONT - ADL
2 stops33h 55mUnited Airlines
mar. 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 10/23. 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.
jue. 11/206:05 amONT - ADL
2 stops34h 20mUnited Airlines
jue. 11/276:10 amADL - ONT
2 stops24h 57mUnited Airlines
Deal found 10/23$1,383
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.
jue. 10/306:38 pmONT - ADL
2 stops25h 47mUnited Airlines
mié. 11/128:30 amADL - ONT
2 stops22h 37mUnited Airlines
Deal found 10/21$1,387
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.
vie. 12/56:00 amONT - ADL
2 stops34h 25mUnited Airlines
vie. 12/126:10 amADL - ONT
2 stops29h 57mUnited Airlines
Deal found 10/21$1,400
This oojo deal was found by Cheapflights users on 10/23. 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.
sáb. 10/256:00 amONT - ADL
2 stops41h 35mQatar Airways
mar. 11/1112:35 pmADL - ONT
3 stops50h 48mQatar Airways
Deal found 10/23$1,869
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3011:59 amONT - ADL
3 stops50h 41mQatar Airways
mié. 11/1210:00 pmADL - ONT
2 stops44h 02mQatar Airways
Deal found 10/21$1,888
This United Airlines deal was found by Cheapflights users on 10/23. 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.
sáb. 10/251:53 pmONT - ADL
2 stops29h 37mUnited Airlines
mar. 11/116:10 amADL - ONT
2 stops24h 57mUnited Airlines
Deal found 10/23$2,009
This United Airlines deal was found by Cheapflights users on 10/22. 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.
vie. 11/76:38 pmONT - ADL
2 stops27h 12mUnited Airlines
mié. 11/266:10 amADL - ONT
2 stops24h 57mUnited Airlines
Deal found 10/22$2,012

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 octubre 23, 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

dom. 12/7

6:41 pm-2:10 pm

2 stops24h 59m

Adelaide

dom. 12/14

6:00 am-12:18 pm

2 stops24h 48m

$1,224

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

lun. 12/29

6:39 pm-9:30 am

1 stop20h 21m

Adelaide

lun. 1/12

2:55 pm-10:53 pm

1 stop26h 28m

$1,311

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 12/11

5:05 am-9:30 am

2 stops33h 55m

Adelaide

mar. 1/13

8:30 am-12:14 pm

2 stops22h 14m

$1,365

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 11/20

6:05 am-10:55 am

2 stops34h 20m

Adelaide

jue. 11/27

6:10 am-12:37 pm

2 stops24h 57m

$1,383

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

vie. 12/5

6:00 am-10:55 am

2 stops34h 25m

Adelaide

vie. 12/12

6:10 am-5:37 pm

2 stops29h 57m

$1,400

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

vie. 11/7

6:38 pm-4:20 pm

2 stops27h 12m

Adelaide

mié. 11/26

6:10 am-12:37 pm

2 stops24h 57m

$2,012

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 11/20

11:59 am-8:10 am

3 stops49h 41m

Adelaide

jue. 11/27

12:35 pm-11:59 pm

3 stops53h 54m

$2,119

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

vie. 12/5

6:00 am-10:30 pm

3 stops46h 00m

Adelaide

vie. 12/12

6:10 am-8:42 pm

3 stops33h 02m

$2,135

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

lun. 12/8

12:46 pm-1:00 pm

2 stops29h 44m

Adelaide

mié. 1/14

1:40 pm-2:18 pm

2 stops43h 08m

$2,327

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

vie. 1/9

6:39 pm-4:20 pm

2 stops27h 11m

Adelaide

mar. 1/13

7:15 am-12:14 pm

2 stops23h 29m

$2,628

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 17 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 24h 59m. United Airlines provides one of the quickest options available for as low as $1,224. 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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