$67+ Cheap flights from Austin to Ontario (AUS - ONT)
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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ONT
Dec 9 — Dec 161
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 January, booked 56 days in advance, depart on a Thursday or Monday 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 November 9, 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 November 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Tue 12/86:30 pm -
1 stop18h 15m
Fri 12/1111:30 am -
1 stop28h 05m
Deal found 11/4![Frontier logo]()
$120
This Mytrip deal was found by Cheapflights users on 11/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:31 pm -
1 stop7h 49m
Thu 12/106:00 am -
1 stop9h 35m
Deal found 11/4![Frontier logo]()
$139
This Booking.com deal was found by Cheapflights users on 11/5. 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 12/86:30 pm -
1 stop5h 47m
Tue 12/156:00 am -
1 stop9h 35m
Deal found 11/5![Frontier logo]()
$141
This Trip.com deal was found by Cheapflights users on 11/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:59 pm -
1 stop17h 46m
Tue 12/86:00 am -
1 stop9h 35m
Deal found 11/4![Frontier logo]()
$145
This Expedia deal was found by Cheapflights users on 11/5. 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.
Thu 12/36:51 pm -
1 stop7h 26m
Thu 12/1011:30 am -
1 stop28h 05m
Deal found 11/5![Frontier logo]()
$147
This Booking.com deal was found by Cheapflights users on 11/6. 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 12/16:59 pm -
1 stop17h 46m
Wed 12/22:00 pm -
1 stop26h 49m
Deal found 11/6![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:51 pm -
1 stop17h 54m
Wed 12/166:00 am -
1 stop9h 35m
Deal found 11/8![Frontier logo]()
$164
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:31 pm -
1 stop5h 46m
Sat 12/1211:00 am -
1 stop7h 07m
Deal found 11/6![Frontier logo]()
$167
This Trip.com deal was found by Cheapflights users on 11/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/318:28 pm -
1 stop27h 25m
Tue 1/52:26 pm -
1 stop27h 04m
Deal found 11/6![Frontier logo]()
$171
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 November 9, 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 November 9, 2026.
This Alaska Airlines deal was found by Cheapflights users on 11/5. 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.
Wed 1/67:18 am -
1 stop10h 15m
Sat 1/97:20 am -
1 stop7h 23m
Deal found 11/5![Alaska Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 11/7. 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.
Sat 12/126:45 am -
2 stops7h 40m
Mon 12/141:35 pm -
1 stop6h 00m
Deal found 11/7![Southwest logo]()
$280
This Delta deal was found by Cheapflights users on 11/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/108:05 am -
1 stop6h 07m
Wed 1/131:20 pm -
1 stop6h 09m
Deal found 11/8![Delta logo]()
$341
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/89:45 am -
2 stops13h 26m
Wed 12/95:00 am -
2 stops13h 00m
Deal found 11/5![United Airlines logo]()
$395
This Alaska Airlines deal was found by Cheapflights users on 11/6. 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 1/237:18 am -
1 stop10h 15m
Sat 1/307:20 am -
1 stop7h 23m
Deal found 11/6![Alaska Airlines logo]()
$267
This Southwest deal was found by Cheapflights users on 11/4. 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 12/811:50 am -
Nonstop3h 05m
Fri 12/119:00 am -
Nonstop2h 45m
Deal found 11/4![Southwest logo]()
$297
This Southwest deal was found by Cheapflights users on 11/7. 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.
Thu 1/147:00 am -
1 stop5h 50m
Sun 1/178:10 am -
Nonstop2h 45m
Deal found 11/7![Southwest logo]()
$341
This Delta deal was found by Cheapflights users on 11/6. 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.
Sat 12/58:10 am -
1 stop6h 07m
Sat 12/126:00 am -
1 stop5h 23m
Deal found 11/6![Delta logo]()
$387
This Southwest deal was found by Cheapflights users on 11/4. 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.
Thu 1/2812:55 pm -
Nonstop3h 15m
Sun 1/318:00 am -
Nonstop2h 45m
Deal found 11/4![Southwest logo]()
$352
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/125:15 am -
2 stops10h 24m
Mon 12/1411:20 am -
2 stops9h 55m
Deal found 11/4![United Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 11/7. 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 12/411:50 am -
Nonstop3h 05m
Sun 12/69:00 am -
Nonstop2h 45m
Deal found 11/7![Southwest logo]()
$428
Last-minute flights from Austin to OntarioDiscover last-minute flight deals from Austin to Ontario. Data last updated November 9, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Ontario. Data last updated November 9, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 11/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:59 pm -
1 stop17h 46m
Tue 12/86:00 am -
1 stop9h 35m
Deal found 11/4![Frontier logo]()
$145
This Booking.com deal was found by Cheapflights users on 11/6. 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 12/16:59 pm -
1 stop17h 46m
Wed 12/22:00 pm -
1 stop26h 49m
Deal found 11/6![Frontier logo]()
$156
This Expedia deal was found by Cheapflights users on 11/5. 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.
Thu 12/36:51 pm -
1 stop7h 26m
Thu 12/1011:30 am -
1 stop28h 05m
Deal found 11/5![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 11/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:51 pm -
1 stop17h 54m
Wed 12/166:00 am -
1 stop9h 35m
Deal found 11/8![Frontier logo]()
$164
This Mytrip deal was found by Cheapflights users on 11/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:31 pm -
1 stop5h 46m
Sat 12/1211:00 am -
1 stop7h 07m
Deal found 11/6![Frontier logo]()
$167
This Mytrip deal was found by Cheapflights users on 11/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:31 pm -
1 stop7h 49m
Thu 12/106:00 am -
1 stop9h 35m
Deal found 11/4![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Tue 12/86:30 pm -
1 stop18h 15m
Fri 12/1111:30 am -
1 stop28h 05m
Deal found 11/4![Frontier logo]()
$120
This Booking.com deal was found by Cheapflights users on 11/5. 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 12/86:30 pm -
1 stop5h 47m
Tue 12/156:00 am -
1 stop9h 35m
Deal found 11/5![Frontier logo]()
$141
This Trip.com deal was found by Cheapflights users on 11/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/318:28 pm -
1 stop27h 25m
Tue 1/52:26 pm -
1 stop27h 04m
Deal found 11/6![Frontier logo]()
$171
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 November 9, 2026.
Search for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated November 9, 2026.
This Super.com deal was found by Cheapflights users on 11/4. 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.
Sat 12/56:31 pm -
1 stop5h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 11/5. 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.
Thu 1/218:02 pm -
1 stop6h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$68
This Jetabroad deal was found by Cheapflights users on 11/6. 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.
Wed 1/67:43 pm -
1 stop6h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Thu 12/36:51 pm -
1 stop7h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 11/5. 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.
Tue 12/16:59 pm -
1 stop17h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$72
This Booking.com deal was found by Cheapflights users on 11/6. 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.
Fri 12/116:31 pm -
1 stop18h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$74
This Super.com deal was found by Cheapflights users on 11/5. 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 12/76:31 pm -
1 stop18h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$75
This Jetabroad deal was found by Cheapflights users on 11/4. 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.
Fri 1/87:43 pm -
1 stop6h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$76
This Super.com deal was found by Cheapflights users on 11/4. 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.
Thu 1/77:43 pm -
1 stop16h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
Mon 1/188:31 pm -
1 stop29h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$80
This Super.com deal was found by Cheapflights users on 11/5. 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.
Thu 1/143:06 pm -
1 stop7h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 11/5. 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 1/48:23 pm -
1 stop19h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Frontier logo]()
$82
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 November 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $120 (Kiwi.com) |
One-way from | $67 (Super.com) |
Popular in | December |
Cheapest in | May |
Average price | $388 |
Good round-trip deal | $302 or less |
Good one-way deal | $250 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 7,457,451 searches. Data last updated November 9, 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
Thu 12/17
6:09 pm-11:57 pm
1 stop7h 48m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$138
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sat 11/28
9:32 pm-8:30 am
1 stop12h 58m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$152
Quickest round-trip
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Tue 12/8
11:50 am-12:55 pm
Nonstop3h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$160
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 12/9
11:50 am-12:55 pm
Nonstop3h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$160
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sat 12/5
3:15 pm-4:25 pm
Nonstop3h 10m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$160
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Mon 1/4
10:25 am-11:30 am
Nonstop3h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$175
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Mon 1/18
7:10 pm-8:25 pm
Nonstop3h 15m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$175
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sun 1/10
12:55 pm-2:10 pm
Nonstop3h 15m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$204
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 12/17
7:35 pm-11:40 pm
2 stops6h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$225
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Fri 12/25
11:45 am-12:50 pm
Nonstop3h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$234
Showing 1-10 of 22 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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | 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 $440). 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 November 9, 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 23% 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 67% 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 43m.
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 50m.
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
Our travel experts
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 November 9, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andJetBlue 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.
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Overall
8.0
Entertainment
7.5
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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Alternative routes for Austin to Ontario
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Complete your trip
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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 November 9, 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 7,457,451 searches. Data last updated November 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$147 | Average$275 | 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$236 | Average$386 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$266 | Average$440 | FlexibilityNo cancel fee | On-time62% |