$623+ 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
Oct 13 — Oct 201
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ontario to Adelaide with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Adelaide
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to AdelaideExplore 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 September 13, 2026.
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 September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/284:17 pm -
2 stops26h 13m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 9/10![United Airlines logo]()
$1,283
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/19:55 am -
2 stops62h 55m
Thu 11/58:55 am -
2 stops32h 18m
Deal found 9/12![Multiple Airlines logo]()
$1,317
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 11/16:37 pm -
2 stops25h 03m
Thu 11/58:40 am -
2 stops27h 46m
Deal found 9/8![United Airlines logo]()
$1,336
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/244:03 pm -
2 stops26h 32m
Sun 9/278:00 pm -
2 stops30h 53m
Deal found 9/11![United Airlines logo]()
$1,338
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/304:17 pm -
2 stops27h 13m
Sun 11/158:40 am -
2 stops25h 23m
Deal found 9/11![United Airlines logo]()
$1,387
This United Airlines deal was found by Cheapflights users on 9/10. 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 11/284:17 pm -
2 stops26h 13m
Wed 12/232:55 pm -
1 stop21h 21m
Deal found 9/10![United Airlines logo]()
$1,606
This Qatar Airways deal was found by Cheapflights users on 9/12. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:02 am -
2 stops40h 28m
Mon 10/510:00 pm -
2 stops38h 14m
Deal found 9/12![Qatar Airways logo]()
$1,813
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 11/201:35 pm -
2 stops28h 55m
Fri 11/276:00 am -
2 stops24h 59m
Deal found 9/12![United Airlines logo]()
$1,829
This Ovago deal was found by Cheapflights users on 9/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:59 pm -
3 stops34h 06m
Sun 9/273:00 pm -
2 stops23h 40m
Deal found 9/11![Multiple Airlines logo]()
$2,140
Best flights from Ontario to AdelaideDiscover carefully curated flight deals from Ontario to Adelaide that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
Discover carefully curated flight deals from Ontario to Adelaide that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/284:17 pm -
2 stops26h 13m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 9/10![United Airlines logo]()
$1,283
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/19:55 am -
2 stops62h 55m
Thu 11/58:55 am -
2 stops32h 18m
Deal found 9/12![Multiple Airlines logo]()
$1,317
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 11/16:37 pm -
2 stops25h 03m
Thu 11/58:40 am -
2 stops27h 46m
Deal found 9/8![United Airlines logo]()
$1,336
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/246:32 pm -
2 stops24h 03m
Mon 9/286:00 am -
2 stops20h 53m
Deal found 9/10![United Airlines logo]()
$1,338
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/304:17 pm -
2 stops27h 13m
Sun 11/158:40 am -
2 stops25h 23m
Deal found 9/11![United Airlines logo]()
$1,387
This United Airlines deal was found by Cheapflights users on 9/10. 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 11/286:37 pm -
2 stops23h 53m
Wed 12/232:55 pm -
2 stops24h 35m
Deal found 9/10![United Airlines logo]()
$1,611
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Fri 11/201:35 pm -
2 stops28h 55m
Fri 11/276:00 am -
2 stops24h 59m
Deal found 9/12![United Airlines logo]()
$1,829
This United Airlines deal was found by Cheapflights users on 9/10. 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 12/264:00 pm -
1 stop23h 00m
Sun 1/36:10 am -
2 stops27h 39m
Deal found 9/10![United Airlines logo]()
$2,794
Last-minute flights from Ontario to AdelaideDiscover last-minute flight deals from Ontario to Adelaide. Data last updated September 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Adelaide. Data last updated September 13, 2026 and is based on user searches.
This Qatar Airways deal was found by Cheapflights users on 9/12. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:02 am -
2 stops40h 28m
Mon 10/510:00 pm -
2 stops38h 14m
Deal found 9/12![Qatar Airways logo]()
$1,813
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/244:03 pm -
2 stops26h 32m
Sun 9/278:00 pm -
2 stops30h 53m
Deal found 9/11![United Airlines logo]()
$1,338
This Ovago deal was found by Cheapflights users on 9/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:59 pm -
3 stops34h 06m
Sun 9/273:00 pm -
2 stops23h 40m
Deal found 9/11![Multiple Airlines logo]()
$2,140
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/284:17 pm -
2 stops26h 13m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 9/10![United Airlines logo]()
$1,283
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/304:17 pm -
2 stops27h 13m
Sun 11/158:40 am -
2 stops25h 23m
Deal found 9/11![United Airlines logo]()
$1,387
One-way flights from Ontario to AdelaideSearch for one-way flight options from Ontario to Adelaide. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
Search for one-way flight options from Ontario to Adelaide. Find affordable one-way fares based on user searches. Data last updated September 13, 2026.
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/86:53 pm -
1 stop20h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![United Airlines logo]()
$623
This United deal was found by Cheapflights users on 9/12. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/184:03 pm -
2 stops35h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$643
This United deal was found by Cheapflights users on 9/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:32 pm -
2 stops33h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$645
This United deal was found by Cheapflights users on 9/9. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:53 pm -
2 stops31h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$646
This United deal was found by Cheapflights users on 9/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:35 pm -
2 stops38h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Multiple Airlines logo]()
$650
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Sun 10/184:03 pm -
2 stops26h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![United Airlines logo]()
$651
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Tue 10/201:52 pm -
2 stops30h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![United Airlines logo]()
$654
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/136:53 pm -
2 stops45h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![United Airlines logo]()
$667
This United deal was found by Cheapflights users on 9/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:52 pm -
2 stops34h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$703
This Alaska Airlines deal was found by Cheapflights users on 9/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:00 am -
2 stops22h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/12![Multiple Airlines logo]()
$705
This United deal was found by Cheapflights users on 9/9. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:10 am -
2 stops36h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$706
Find 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 September 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,216 (Priceline) |
One-way from | $623 (United Airlines) |
Popular in | January |
Cheapest in | February |
Average price | $1,200 |
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 7,457,451 searches. Data last updated September 13, 2026.
Use the filters below to find and compare flights from Ontario to Adelaide that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Mon 2/8
6:53 pm-9:30 am
1 stop20h 07m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$623
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Wed 2/10
6:53 pm-9:10 pm
2 stops31h 47m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$646
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Tue 10/27
1:35 pm-9:10 pm
2 stops38h 05m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$650
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sun 2/7
6:53 pm-4:20 pm
2 stops26h 57m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$651
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Tue 2/9
6:53 pm-4:20 pm
2 stops26h 57m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$651
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sun 10/18
4:03 pm-12:10 pm
2 stops26h 37m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$651
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Tue 10/27
1:35 pm-2:10 pm
2 stops31h 05m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$654
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Tue 10/20
1:52 pm-1:45 pm
2 stops30h 23m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$654
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sat 2/13
6:53 pm-10:55 am
2 stops45h 32m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$667
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Thu 2/11
4:03 pm-4:20 pm
2 stops29h 47m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$707
Showing 1-10 of 20 resultsSorted by cheapest first
- Most accurate provider: When it comes to deals on Ontario-Adelaide flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Adelaide flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Adelaide flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Adelaide flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Adelaide flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
ONT-ADL
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.
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Adelaide flight routes
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Popular flights