$80+ Cheap flights from Austin to Ontario (AUS - ONT)
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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ONT
Sep 13 — Sep 201
Round-trip
1 adult, Economy
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Find cheap flights from Austin to Ontario 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.Cheapflights Tip: The best prices from Austin Bergstrom to Ontario are usually found in May or September, booked 56 days in advance, depart on a Monday or Tuesday and return on a Tuesday
Cheap flight deals from Austin to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Austin to OntarioExplore the most affordable flight options available from Austin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
Explore the most affordable flight options available from Austin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2026.
This Frontier deal was found by Cheapflights users on 8/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:31 pm -
1 stop9h 28m
Wed 11/42:35 pm -
1 stop7h 24m
Deal found 8/11![Frontier logo]()
$182
This Booking.com deal was found by Cheapflights users on 8/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:47 pm -
1 stop5h 02m
Tue 9/83:40 pm -
1 stop20h 57m
Deal found 8/12![Frontier logo]()
$188
This Frontier deal was found by Cheapflights users on 8/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:15 am -
1 stop6h 28m
Tue 11/36:15 am -
1 stop11h 11m
Deal found 8/11![Frontier logo]()
$189
This Frontier deal was found by Cheapflights users on 8/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:45 am -
1 stop5h 58m
Mon 11/92:35 pm -
1 stop7h 24m
Deal found 8/12![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 8/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:15 pm -
1 stop5h 35m
Tue 9/87:56 pm -
1 stop21h 33m
Deal found 8/11![Frontier logo]()
$192
This Booking.com deal was found by Cheapflights users on 8/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:04 pm -
1 stop19h 55m
Mon 9/288:24 pm -
1 stop16h 13m
Deal found 8/14![Frontier logo]()
$194
This Booking.com deal was found by Cheapflights users on 8/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:32 pm -
1 stop26h 38m
Fri 10/92:55 pm -
1 stop7h 04m
Deal found 8/11![Frontier logo]()
$195
This Frontier deal was found by Cheapflights users on 8/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:24 pm -
1 stop5h 23m
Sat 9/196:15 am -
1 stop11h 14m
Deal found 8/12![Frontier logo]()
$196
This Expedia deal was found by Cheapflights users on 8/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:32 pm -
1 stop21h 50m
Wed 9/236:15 am -
1 stop11h 14m
Deal found 8/14![Frontier logo]()
$198
This CheapOair deal was found by Cheapflights users on 8/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:51 pm -
1 stop20h 58m
Tue 9/87:56 pm -
1 stop21h 33m
Deal found 8/11![Frontier logo]()
$199
This CheapOair deal was found by Cheapflights users on 8/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:53 pm -
1 stop20h 17m
Fri 12/410:05 am -
1 stop27h 40m
Deal found 8/13![Frontier logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:15 am -
1 stop19h 35m
Tue 9/155:44 pm -
1 stop18h 53m
Deal found 8/12![Frontier logo]()
$209
Best flights from Austin to OntarioDiscover carefully curated flight deals from Austin to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
Discover carefully curated flight deals from Austin to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2026.
This Southwest deal was found by Cheapflights users on 8/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:30 pm -
Nonstop3h 05m
Tue 10/276:10 am -
1 stop6h 30m
Deal found 8/11![Southwest logo]()
$230
This United Airlines deal was found by Cheapflights users on 8/13. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:15 am -
1 stop6h 57m
Tue 9/86:00 am -
1 stop5h 12m
Deal found 8/13![United Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 8/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:00 am -
1 stop6h 10m
Fri 11/201:25 pm -
1 stop6h 16m
Deal found 8/12![Delta logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:52 pm -
1 stop8h 02m
Sun 10/2511:13 am -
1 stop10h 01m
Deal found 8/11![Alaska Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:50 am -
Nonstop3h 00m
Tue 9/158:30 am -
Nonstop2h 50m
Deal found 8/13![Southwest logo]()
$303
This United Airlines deal was found by Cheapflights users on 8/13. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am -
1 stop6h 23m
Sat 10/101:52 pm -
2 stops8h 07m
Deal found 8/13![United Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 8/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:00 am -
1 stop6h 14m
Mon 9/141:04 pm -
1 stop6h 41m
Deal found 8/9![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 8/12. 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 11/1110:45 am -
2 stops9h 16m
Mon 11/169:25 am -
2 stops11h 50m
Deal found 8/12![United Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 8/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:00 am -
1 stop8h 10m
Sun 9/2012:40 pm -
Nonstop2h 50m
Deal found 8/11![Southwest logo]()
$341
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:00 am -
1 stop6h 16m
Sun 9/66:00 am -
1 stop5h 09m
Deal found 8/13![Delta logo]()
$378
This United Airlines deal was found by Cheapflights users on 8/11. 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 9/177:05 am -
1 stop7h 07m
Sun 9/206:00 am -
1 stop5h 12m
Deal found 8/11![United Airlines logo]()
$385
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/165:27 am -
2 stops8h 45m
Sun 9/206:08 am -
1 stop5h 56m
Deal found 8/10![United Airlines logo]()
$390
Last-minute flights from Austin to OntarioDiscover last-minute flight deals from Austin to Ontario. Data last updated August 14, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Ontario. Data last updated August 14, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 8/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:15 pm -
1 stop5h 35m
Tue 9/87:56 pm -
1 stop21h 33m
Deal found 8/11![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 8/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:51 pm -
1 stop20h 58m
Tue 9/87:56 pm -
1 stop21h 33m
Deal found 8/11![Frontier logo]()
$199
This Booking.com deal was found by Cheapflights users on 8/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/512:47 pm -
1 stop5h 02m
Tue 9/83:40 pm -
1 stop20h 57m
Deal found 8/13![Frontier logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:15 am -
1 stop19h 35m
Tue 9/155:44 pm -
1 stop18h 53m
Deal found 8/12![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:15 am -
1 stop19h 35m
Mon 9/148:24 pm -
1 stop16h 13m
Deal found 8/12![Frontier logo]()
$215
This Frontier deal was found by Cheapflights users on 8/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:04 pm -
1 stop10h 00m
Thu 9/1711:45 am -
1 stop5h 44m
Deal found 8/11![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 8/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:24 pm -
1 stop5h 23m
Sat 9/196:15 am -
1 stop11h 14m
Deal found 8/12![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:24 pm -
1 stop16h 06m
Mon 9/218:24 pm -
1 stop16h 13m
Deal found 8/14![Frontier logo]()
$198
This Booking.com deal was found by Cheapflights users on 8/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:24 pm -
1 stop5h 23m
Sun 9/2011:45 am -
1 stop22h 45m
Deal found 8/13![Frontier logo]()
$216
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:24 pm -
1 stop5h 23m
Wed 9/236:15 am -
1 stop11h 14m
Deal found 8/13![Frontier logo]()
$189
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:24 pm -
1 stop5h 23m
Wed 9/3011:45 am -
1 stop5h 44m
Deal found 8/13![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 8/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/211:25 pm -
1 stop12h 22m
Tue 9/2911:45 am -
1 stop5h 44m
Deal found 8/13![Frontier logo]()
$212
One-way flights from Austin to OntarioSearch for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
Search for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated August 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:25 pm -
1 stop12h 22m
Deal found 8/14![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:15 pm -
1 stop15h 49m
Deal found 8/12![Frontier logo]()
$86
This Super.com deal was found by Cheapflights users on 8/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/512:12 pm -
1 stop6h 47m
Deal found 8/11![Frontier logo]()
$90
This Booking.com deal was found by Cheapflights users on 8/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:24 pm -
1 stop5h 23m
Deal found 8/14![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 8/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:12 pm -
1 stop20h 58m
Deal found 8/13![Frontier logo]()
$95
This Booking.com deal was found by Cheapflights users on 8/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:32 pm -
1 stop26h 58m
Deal found 8/13![Frontier logo]()
$97
This Jetabroad deal was found by Cheapflights users on 8/13. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:21 pm -
1 stop16h 22m
Deal found 8/13![Frontier logo]()
$99
Find flight deals from Austin to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to Ontario (ONT). 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 August 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $182 (Frontier) |
One-way from | $80 (Kiwi.com) |
Popular in | December |
Cheapest in | May |
Average price | $357 |
Good round-trip deal | $267 or less |
Good one-way deal | $143 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Austin to Ontario 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 August 14, 2026.
Use the filters below to find and compare flights from Austin to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Tue 10/20
5:30 pm-6:35 pm
Nonstop3h 05m
Ontario
Tue 10/27
6:10 am-2:40 pm
1 stop6h 30m
$230
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 9/3
7:15 am-12:12 pm
1 stop6h 57m
Ontario
Tue 9/8
6:00 am-1:12 pm
1 stop5h 12m
$263
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 11/12
8:00 am-12:10 pm
1 stop6h 10m
Ontario
Fri 11/20
1:25 pm-9:41 pm
1 stop6h 16m
$295
Quickest round-trip
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Tue 9/8
10:50 am-11:50 am
Nonstop3h 00m
Ontario
Tue 9/15
8:30 am-1:20 pm
Nonstop2h 50m
$303
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 10/1
6:00 am-10:23 am
1 stop6h 23m
Ontario
Sat 10/10
1:52 pm-11:59 pm
2 stops8h 07m
$328
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 11/11
10:45 am-6:01 pm
2 stops9h 16m
Ontario
Mon 11/16
9:25 am-11:15 pm
2 stops11h 50m
$333
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Fri 9/18
6:00 am-12:10 pm
1 stop8h 10m
Ontario
Sun 9/20
12:40 pm-5:30 pm
Nonstop2h 50m
$341
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 10/22
5:52 pm-11:54 pm
1 stop8h 02m
Ontario
Sun 10/25
11:13 am-11:14 pm
1 stop10h 01m
$350
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 9/10
8:00 am-12:14 pm
1 stop6h 14m
Ontario
Mon 9/14
1:04 pm-9:45 pm
1 stop6h 41m
$357
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 9/2
8:00 am-12:16 pm
1 stop6h 16m
Ontario
Sun 9/6
6:00 am-1:09 pm
1 stop5h 09m
$378
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Austin to Ontario
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 Austin to Ontario in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Austin-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Austin-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Austin-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Austin-Ontario 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 Austin-Ontario 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 Austin to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Austin with our price prediction graph.
AUS-ONT
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 Austin to Ontario
Prices
More
How far ahead should I book a flight from Austin to Ontario?
To ensure you get the cheapest price possible for a flight from Austin to Ontario, you should look to book at least 55 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Austin to Ontario?
Currently, May is the cheapest month in which you can book a flight from Austin to Ontario (average of $276). Flying from Austin to Ontario in December is currently the most expensive (average of $448). 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.
What is the cheapest time of day to fly from AUS to ONT?
Find hourly flight availability from Austin to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2026.
When flying from Austin to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 21% versus a flight in the afternoon.
What’s the top layover airport for flights from Austin to Ontario?
Share of 1-stop round-trip flights from Austin to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 75% of 1-stop itineraries from Austin to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from Austin to Ontario?
Average round-trip fare for 1-stop flights from Austin to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Dallas (DFW) is the most affordable 1-stop option, with an average round-trip price of $440.
What’s the fastest layover option from Austin to Ontario?
Shortest average travel time for 1-stop one-way flights from Austin to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 4h 42m.
Which airport typically offers the quickest layover for flights from Austin to Ontario?
Average layover duration for 1-stop one-way flights from Austin to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 0h 48m.
The best insider tips for Austin to Ontario flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Austin to Ontario trip
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Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated August 14, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andAmerican Airlines from Austin to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Austin to Ontario. 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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Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 14, 2026.
Austin and Ontario flights
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Top 5 airlines flying from Austin to Ontario
Discover the top 5 airlines that operate flights from Austin to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$147 | Average$272 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$286 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$216 | Average$356 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$440 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$389 | FlexibilityNo cancel fee | On-time63% |