$678+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
Nov 18 — Nov 251
Round-trip
1 adult, Economy
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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
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Last-minute
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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 October 19, 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 October 19, 2026.
This United Airlines deal was found by Cheapflights users on 10/17. 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 10/264:17 pm -
2 stops26h 13m
Wed 11/186:10 am -
2 stops24h 49m
Deal found 10/17![United Airlines logo]()
$1,410
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/101:35 pm -
2 stops30h 05m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 10/16![United Airlines logo]()
$1,417
This United Airlines deal was found by Cheapflights users on 10/18. 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 12/26:40 pm -
2 stops27h 10m
Wed 12/96:10 am -
2 stops27h 55m
Deal found 10/18![United Airlines logo]()
$1,497
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/54:17 pm -
2 stops29h 33m
Thu 11/198:40 am -
2 stops22h 19m
Deal found 10/19![United Airlines logo]()
$1,513
This United Airlines deal was found by Cheapflights users on 10/19. 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 12/36:40 pm -
2 stops27h 10m
Thu 12/108:40 am -
2 stops30h 28m
Deal found 10/19![United Airlines logo]()
$1,600
This United Airlines deal was found by Cheapflights users on 10/19. 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 1/106:10 am -
2 stops22h 17m
Deal found 10/19![United Airlines logo]()
$1,636
This United Airlines deal was found by Cheapflights users on 10/16. 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 stops28h 12m
Sun 10/256:10 am -
2 stops23h 49m
Deal found 10/16![United Airlines logo]()
$1,690
This United Airlines deal was found by Cheapflights users on 10/18. 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 10/234:03 pm -
2 stops27h 27m
Sat 11/286:10 am -
2 stops24h 49m
Deal found 10/18![United Airlines logo]()
$1,835
This United Airlines deal was found by Cheapflights users on 10/15. 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 12/26:40 pm -
2 stops27h 10m
Sun 12/138:40 am -
2 stops25h 25m
Deal found 10/15![United Airlines logo]()
$1,851
This American Airlines deal was found by Cheapflights users on 10/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:32 am -
2 stops32h 28m
Thu 12/106:25 am -
3 stops27h 40m
Deal found 10/19![American Airlines logo]()
$1,866
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 October 19, 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 October 19, 2026.
This United Airlines deal was found by Cheapflights users on 10/15. 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 4/76:53 pm -
2 stops23h 47m
Thu 5/66:05 am -
2 stops25h 52m
Deal found 10/15![United Airlines logo]()
$1,364
This Qatar Airways deal was found by Cheapflights users on 10/15. 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 1/257:00 am -
2 stops39h 35m
Fri 2/510:00 pm -
2 stops39h 21m
Deal found 10/15![Qatar Airways logo]()
$1,825
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/54:17 pm -
2 stops29h 33m
Thu 11/198:40 am -
2 stops22h 19m
Deal found 10/19![United Airlines logo]()
$1,513
This United Airlines deal was found by Cheapflights users on 10/16. 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 1/202:00 pm -
2 stops29h 25m
Sun 1/316:10 am -
2 stops22h 17m
Deal found 10/16![United Airlines logo]()
$1,552
This Qatar Airways deal was found by Cheapflights users on 10/17. 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 1/257:00 am -
2 stops39h 35m
Sat 2/610:00 pm -
2 stops39h 21m
Deal found 10/17![Qatar Airways logo]()
$1,899
This United Airlines deal was found by Cheapflights users on 10/19. 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 12/36:40 pm -
2 stops27h 10m
Thu 12/108:40 am -
2 stops30h 28m
Deal found 10/19![United Airlines logo]()
$1,600
This Qatar Airways deal was found by Cheapflights users on 10/15. 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.
Sat 1/2311:36 am -
2 stops34h 59m
Sun 1/3110:00 pm -
2 stops39h 21m
Deal found 10/15![Qatar Airways logo]()
$1,940
This United Airlines deal was found by Cheapflights users on 10/18. 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 12/114:17 pm -
2 stops29h 33m
Sat 12/192:55 pm -
1 stop26h 28m
Deal found 10/18![United Airlines logo]()
$1,947
Last-minute flights from Ontario to AdelaideDiscover last-minute flight deals from Ontario to Adelaide. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Adelaide. Data last updated October 19, 2026 and is based on user searches.
This Qatar Airways deal was found by Cheapflights users on 10/16. 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 10/196:02 am -
2 stops40h 28m
Sat 11/710:00 pm -
2 stops38h 47m
Deal found 10/16![Qatar Airways logo]()
$8,926
This Qatar Airways deal was found by Cheapflights users on 10/16. 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 10/196:02 am -
2 stops40h 28m
Tue 11/310:00 pm -
2 stops38h 47m
Deal found 10/16![Qatar Airways logo]()
$9,407
This Qatar Airways deal was found by Cheapflights users on 10/16. 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 10/196:02 am -
2 stops40h 28m
Thu 11/510:00 pm -
2 stops43h 36m
Deal found 10/16![Qatar Airways logo]()
$10,402
This Qatar Airways deal was found by Cheapflights users on 10/17. 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.
Tue 10/202:13 pm -
2 stops56h 17m
Thu 11/510:00 pm -
2 stops38h 47m
Deal found 10/17![Qatar Airways logo]()
$8,796
This Qatar Airways deal was found by Cheapflights users on 10/17. 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.
Tue 10/202:13 pm -
2 stops56h 17m
Sun 11/110:00 pm -
2 stops43h 36m
Deal found 10/17![Qatar Airways logo]()
$8,946
This Qatar Airways deal was found by Cheapflights users on 10/17. 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.
Wed 10/2111:13 am -
2 stops35h 17m
Fri 11/610:00 pm -
2 stops38h 47m
Deal found 10/17![Qatar Airways logo]()
$8,775
This Qatar Airways deal was found by Cheapflights users on 10/17. 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.
Wed 10/2111:13 am -
2 stops35h 17m
Sat 11/710:00 pm -
2 stops43h 36m
Deal found 10/17![Qatar Airways logo]()
$8,925
This Qatar Airways deal was found by Cheapflights users on 10/17. 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 10/226:02 am -
2 stops40h 28m
Fri 11/610:00 pm -
2 stops38h 47m
Deal found 10/17![Qatar Airways logo]()
$10,401
This United Airlines deal was found by Cheapflights users on 10/18. 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 10/234:03 pm -
2 stops27h 27m
Sat 11/286:10 am -
2 stops24h 49m
Deal found 10/18![United Airlines logo]()
$1,835
This United Airlines deal was found by Cheapflights users on 10/17. 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 10/264:17 pm -
2 stops26h 13m
Wed 11/186:10 am -
2 stops24h 49m
Deal found 10/17![United Airlines logo]()
$1,410
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/54:17 pm -
2 stops29h 33m
Thu 11/198:40 am -
2 stops22h 19m
Deal found 10/19![United Airlines logo]()
$1,513
This United Airlines deal was found by Cheapflights users on 10/16. 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 11/101:35 pm -
2 stops30h 05m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 10/16![United Airlines logo]()
$1,417
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 October 19, 2026.
Search for one-way flight options from Ontario to Adelaide. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
This United deal was found by Cheapflights users on 10/16. 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 2/246:35 pm -
2 stops24h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Multiple Airlines logo]()
$678
This United deal was found by Cheapflights users on 10/15. 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 2/32:00 pm -
2 stops29h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![Multiple Airlines logo]()
$681
This United deal was found by Cheapflights users on 10/16. 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 11/246:37 pm -
2 stops30h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Multiple Airlines logo]()
$716
This United Airlines deal was found by Cheapflights users on 10/15. 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 2/51:42 pm -
2 stops49h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/15![United Airlines logo]()
$741
This Qatar Airways deal was found by Cheapflights users on 10/16. 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.
Sat 1/911:36 am -
2 stops34h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Qatar Airways logo]()
$1,264
This United Airlines deal was found by Cheapflights users on 10/16. 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 1/911:20 am -
1 stop27h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![United Airlines logo]()
$1,624
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 October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,364 (United Airlines) |
One-way from | $678 (United) |
Popular in | October |
Cheapest in | February |
Average price | $1,408 |
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 October 19, 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
Wed 2/24
6:35 pm-1:55 pm
2 stops24h 50m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$678
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Wed 2/3
2:00 pm-1:55 pm
2 stops29h 25m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$681
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Tue 11/24
6:37 pm-7:10 pm
2 stops30h 03m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$716
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Fri 2/5
1:42 pm-9:30 am
2 stops49h 18m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$741
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sat 1/9
11:36 am-5:05 pm
2 stops34h 59m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$1,264
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Wed 4/7
6:53 pm-11:10 am
2 stops23h 47m
Adelaide
Thu 5/6
6:05 am-3:27 pm
2 stops25h 52m
$1,364
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Thu 11/5
4:17 pm-4:20 pm
2 stops29h 33m
Adelaide
Thu 11/19
8:40 am-12:29 pm
2 stops22h 19m
$1,513
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Wed 1/20
2:00 pm-1:55 pm
2 stops29h 25m
Adelaide
Sun 1/31
6:10 am-9:57 am
2 stops22h 17m
$1,552
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Thu 12/3
6:40 pm-4:20 pm
2 stops27h 10m
Adelaide
Thu 12/10
8:40 am-8:38 pm
2 stops30h 28m
$1,600
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sat 1/9
11:20 am-9:30 am
1 stop27h 40m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$1,624
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Ontario to Adelaide
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Adelaide in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
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