$642+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ADL
Oct 18 — Oct 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
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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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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 18, 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 18, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/284:17 pm -
2 stops26h 13m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 9/16![United Airlines logo]()
$1,282
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 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 9/16![Multiple Airlines logo]()
$1,316
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Thu 9/177:13 pm -
2 stops23h 22m
Wed 9/306:00 am -
2 stops20h 53m
Deal found 9/16![United Airlines logo]()
$1,336
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Thu 11/194:17 pm -
2 stops29h 33m
Fri 11/276:00 am -
2 stops24h 59m
Deal found 9/16![United Airlines logo]()
$1,383
This United deal was found by Cheapflights users on 9/16. 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.
Fri 11/201:35 pm -
2 stops38h 25m
Fri 11/276:10 am -
2 stops24h 49m
Deal found 9/16![Multiple Airlines logo]()
$1,531
This United Airlines deal was found by Cheapflights users on 9/16. 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 11/214:17 pm -
2 stops29h 33m
Sat 11/286:10 am -
2 stops24h 49m
Deal found 9/16![United Airlines logo]()
$1,536
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 11/201:35 pm -
2 stops28h 55m
Fri 11/276:10 am -
2 stops24h 49m
Deal found 9/16![United Airlines logo]()
$1,615
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Sat 12/264:00 pm -
1 stop23h 00m
Sun 1/106:10 am -
2 stops22h 07m
Deal found 9/17![United Airlines logo]()
$1,632
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 12/106:40 pm -
2 stops25h 00m
Wed 12/232:55 pm -
1 stop26h 28m
Deal found 9/15![United Airlines logo]()
$1,712
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 18, 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 18, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/87:00 am -
2 stops33h 30m
Thu 2/185:20 pm -
2 stops22h 38m
Deal found 9/17![Multiple Airlines logo]()
$1,224
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/284:17 pm -
2 stops26h 13m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 9/16![United Airlines logo]()
$1,282
This Qatar Airways deal was found by Cheapflights users on 9/17. 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 2/87:00 am -
2 stops39h 35m
Mon 2/1510:00 pm -
2 stops41h 58m
Deal found 9/17![Qatar Airways logo]()
$1,716
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/67:00 am -
2 stops30h 40m
Tue 2/165:20 pm -
2 stops22h 38m
Deal found 9/17![Multiple Airlines logo]()
$1,224
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 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 9/17![Multiple Airlines logo]()
$1,316
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 12/264:00 pm -
1 stop23h 00m
Sun 1/106:10 am -
2 stops22h 07m
Deal found 9/15![United Airlines logo]()
$1,633
This United deal was found by Cheapflights users on 9/16. 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.
Fri 11/201:35 pm -
2 stops38h 25m
Fri 11/276:10 am -
2 stops24h 49m
Deal found 9/16![Multiple Airlines logo]()
$1,531
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 12/106:40 pm -
2 stops25h 00m
Wed 12/232:55 pm -
2 stops24h 35m
Deal found 9/15![United Airlines logo]()
$1,717
Last-minute flights from Ontario to AdelaideDiscover last-minute flight deals from Ontario to Adelaide. Data last updated September 18, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Adelaide. Data last updated September 18, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Thu 9/177:13 pm -
2 stops23h 22m
Wed 9/306:00 am -
2 stops20h 53m
Deal found 9/16![United Airlines logo]()
$1,336
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/284:17 pm -
2 stops26h 13m
Tue 11/178:40 am -
2 stops22h 19m
Deal found 9/16![United Airlines logo]()
$1,282
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 18, 2026.
Search for one-way flight options from Ontario to Adelaide. Find affordable one-way fares based on user searches. Data last updated September 18, 2026.
This United deal was found by Cheapflights users on 9/14. 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 9/14![Multiple Airlines logo]()
$642
This United deal was found by Cheapflights users on 9/14. 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 2/2411:20 am -
2 stops32h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$644
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 9/16. 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.
Sun 3/146:53 pm -
2 stops25h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$649
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 10/196:32 pm -
2 stops24h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$650
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/14![United Airlines logo]()
$654
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 10/251:35 pm -
2 stops30h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$655
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 9/14. 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 9/14![Multiple Airlines logo]()
$704
This United deal was found by Cheapflights users on 9/15. 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.
Sat 10/171:52 pm -
2 stops36h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$705
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 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,224 (Alaska Airlines) |
One-way from | $642 (United) |
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 18, 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
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Wed 2/24
11:20 am-1:55 pm
2 stops32h 05m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$644
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sun 10/18
4:03 pm-9:00 pm
2 stops35h 27m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$646
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sun 3/14
1:33 pm-7:10 pm
2 stops36h 07m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$649
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
Thu 10/15
7:00 am-11:55 am
2 stops35h 25m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$712
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sat 10/17
7:00 am-6:25 pm
2 stops41h 55m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$712
Quickest round-trip
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Fri 10/16
7:00 am-10:35 pm
2 stops22h 05m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$712
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Fri 10/23
4:03 pm-1:00 pm
2 stops27h 27m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$714
OntarioAdelaide
ONT Ontario - ADL Adelaide
ONTADL
Ontario
Sat 10/24
8:03 am-10:55 am
3 stops33h 22m
Adelaide
Wed 12/31
12:00 am-6:30 am
Nonstop0h 00m
$715
Showing 1-10 of 18 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.
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