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$708+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
dic. 4 — dic. 111
jue. 12/4
jue. 12/11
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 noviembre 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,131
(United Airlines)

One-way from

$708
(United Airlines)

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 noviembre 4, 2025.

This United Airlines deal was found by Cheapflights users on 11/3. 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. 12/131:50 pmONT - ADL
1 stop25h 10mUnited Airlines
sáb. 1/102:55 pmADL - ONT
1 stop21h 26mUnited Airlines
Deal found 11/3$1,939
This United Airlines deal was found by Cheapflights users on 11/2. 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. 12/185:05 amONT - ADL
2 stops33h 55mUnited Airlines
jue. 12/257:15 amADL - ONT
2 stops29h 06mUnited Airlines
Deal found 11/2$2,190
This United Airlines deal was found by Cheapflights users on 11/1. 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. 12/226:39 pmONT - ADL
1 stop20h 21mUnited Airlines
mar. 12/306:10 amADL - ONT
2 stops22h 21mUnited Airlines
Deal found 11/1$2,629
This BYOjet deal was found by Cheapflights users on 11/2. 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 BYOjet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/185:05 amONT - ADL
3 stops40h 45mAir Canada
jue. 12/256:00 amADL - ONT
3 stops33h 37mAir Canada
Deal found 11/2$3,710
This Mytrip deal was found by Cheapflights users on 11/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1810:42 amONT - ADL
3 stops32h 33mMultiple Airlines
jue. 12/254:30 pmADL - ONT
2 stops42h 50mMultiple Airlines
Deal found 11/2$4,945
This United Airlines deal was found by Cheapflights users on 11/2. 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. 12/226:39 pmONT - ADL
1 stop20h 21mUnited Airlines
mié. 12/312:55 pmADL - ONT
1 stop26h 08mUnited Airlines
Deal found 11/2$5,929
This Qatar Airways deal was found by Cheapflights users on 11/3. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/1310:47 amONT - ADL
2 stops35h 48mQatar Airways
sáb. 1/1010:00 pmADL - ONT
2 stops39h 15mQatar Airways
Deal found 11/3$6,902
This United Airlines deal was found by Cheapflights users on 11/2. 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. 12/226:39 pmONT - ADL
1 stop20h 21mUnited Airlines
lun. 1/52:55 pmADL - ONT
1 stop21h 18mUnited Airlines
Deal found 11/2$7,666
This United Airlines deal was found by Cheapflights users on 11/2. 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. 11/246:38 pmONT - ADL
2 stops25h 02mUnited Airlines
vie. 12/59:30 amADL - ONT
2 stops26h 37mUnited Airlines
Deal found 11/2$9,049

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 noviembre 4, 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

mié. 2/18

1:45 pm-9:30 am

2 stops49h 15m

Adelaide

mié. 3/18

1:55 pm-8:45 pm

2 stops24h 20m

$1,131

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 4/9

6:53 pm-10:55 am

2 stops23h 32m

Adelaide

sáb. 4/25

6:05 am-12:20 pm

2 stops22h 45m

$1,401

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

sáb. 12/13

1:50 pm-9:30 am

1 stop25h 10m

Adelaide

sáb. 1/10

2:55 pm-5:51 pm

1 stop21h 26m

$1,939

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 12/18

5:05 am-9:30 am

2 stops33h 55m

Adelaide

jue. 12/25

7:15 am-5:51 pm

2 stops29h 06m

$2,190

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

lun. 12/22

6:39 pm-9:30 am

1 stop20h 21m

Adelaide

mar. 12/30

6:10 am-10:01 am

2 stops22h 21m

$2,629

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 12/18

5:05 am-4:20 pm

3 stops40h 45m

Adelaide

jue. 12/25

6:00 am-9:07 pm

3 stops33h 37m

$3,710

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 12/18

10:42 am-1:45 pm

3 stops32h 33m

Adelaide

jue. 12/25

4:30 pm-4:50 pm

2 stops42h 50m

$4,945

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

lun. 12/22

6:39 pm-9:30 am

1 stop20h 21m

Adelaide

mié. 12/31

2:55 pm-10:33 pm

1 stop26h 08m

$5,929

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

jue. 12/4

6:00 am-10:55 am

3 stops34h 25m

$708

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

dom. 1/11

1:24 pm-9:30 am

2 stops49h 36m

$1,015

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 14 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, 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 49h 15m. United Airlines provides one of the quickest options available for as low as $1,131. 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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