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$1,367+ Cheap flights from Ontario (ONT) to Adelaide (ADL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$1,367
(United Airlines)

Popular in

October

Cheapest in

April

Average price

$1,258
From Ontario to Adelaide
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/12. 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.
Wed 8/206:50 pmONT - ADL
2 stops23h 45mUnited Airlines
Wed 8/276:05 amADL - ONT
2 stops22h 38mUnited Airlines
Deal found 6/12$1,367
This oojo deal was found by Cheapflights users on 6/9. 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.
Tue 7/2912:00 pmONT - ADL
2 stops35h 20mQatar Airways
Tue 8/1211:40 amADL - ONT
3 stops53h 03mQatar Airways
Deal found 6/9$2,488
This Qatar Airways deal was found by Cheapflights users on 6/9. 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.
Thu 6/1212:00 pmONT - ADL
3 stops50h 10mMultiple Airlines
Fri 6/209:40 pmADL - ONT
2 stops36h 47mMultiple Airlines
Deal found 6/9$3,011

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 June 12, 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

Wed 8/20

6:50 pm-11:05 am

2 stops23h 45m

Adelaide

Wed 8/27

6:05 am-12:13 pm

2 stops22h 38m

$1,367

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Tue 7/29

12:00 pm-3:50 pm

2 stops35h 20m

Adelaide

Tue 8/12

11:40 am-12:13 am

3 stops53h 03m

$2,488

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Tue 9/30

1:53 pm-10:55 am

2 stops28h 32m

$2,111

OntarioAdelaide

ONT - ADL

ONTADL

Ontario

Sat 8/9

6:00 am-6:40 am

3 stops56h 10m

$9,711

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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, August is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $1,214). Flying from Ontario to Adelaide in December is currently the most expensive (average of $2,057). 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.

Rainfall in Adelaide by month

Plan your trip to Adelaide by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Adelaide ranges from 0.4 - 2.4 inches per month. July is typically the wettest month, when rainfall can reach 2.4 in. January is typically the driest time to visit Adelaide when rainfall is around 0.4 in.

Temperature in Adelaide by month

Plan your trip to Adelaide by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Adelaide, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Adelaide

Get insights into the airlines that provide service to Adelaide. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Adelaide. Reviews last updated June 12, 2025.
To help decide which airline to fly from Ontario to Adelaide, see what other customers have to say about Qatar Airways and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Qatar Airways
7.4
Good
3,584 reviews

Overall

7.4

Food

7.3

Boarding

7.5

Comfort

7.4

Entertainment

7.4

Crew

7.9

Reviews

1 / 20
10.0
Excellent

fa,May 2025

PHL - DOH

The best,the staff was experienced,cheerful, professional,I will use from now on more frequently American airlines
Qatar Airways
7.4
Good
3,584 reviews
Qatar Airways
7.4
Good
3,584 reviews

Overall

7.4

Food

7.3

Boarding

7.5

Comfort

7.4

Entertainment

7.4

Crew

7.9

Reviews

1 / 20
10.0
Excellent

fa,May 2025

PHL - DOH

The best,the staff was experienced,cheerful, professional,I will use from now on more frequently American airlines
United Airlines
7.4
Good
8,790 reviews
Qatar Airways
7.4
Good
3,584 reviews

Overall

7.4

Food

7.3

Boarding

7.5

Comfort

7.4

Entertainment

7.4

Crew

7.9

Reviews

1 / 20
10.0
Excellent

fa,May 2025

PHL - DOH

The best,the staff was experienced,cheerful, professional,I will use from now on more frequently American airlines

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.

  • 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, August is the cheapest month in which you can book a flight from Ontario to Adelaide (average of $1,214). Flying from Ontario to Adelaide in December is currently the most expensive (average of $2,057). 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 Ontario?

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

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