$87+ Cheap flights from Ontario to Austin (ONT - AUS)
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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
Oct 5 — Oct 121
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Austin 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 Ontario to Austin Bergstrom are usually found in January or August, booked 34 days in advance, depart on a Tuesday or Wednesday and return on a Monday
Cheap flight deals from Ontario to Austin
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to AustinExplore the most affordable flight options available from Ontario to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
Explore the most affordable flight options available from Ontario to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
This Mytrip deal was found by Cheapflights users on 9/2. 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.
Thu 9/2411:45 am -
1 stop5h 44m
Mon 9/288:24 pm -
1 stop5h 23m
Deal found 9/2![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Wed 11/46:25 am -
1 stop11h 01m
Tue 11/108:21 pm -
1 stop29h 30m
Deal found 9/3![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/276:25 am -
1 stop11h 01m
Tue 11/108:21 pm -
1 stop29h 30m
Deal found 9/3![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/276:25 am -
1 stop11h 01m
Wed 11/118:21 pm -
1 stop16h 14m
Deal found 9/3![Frontier logo]()
$180
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2611:45 am -
1 stop5h 44m
Mon 9/288:24 pm -
1 stop16h 06m
Deal found 9/3![Frontier logo]()
$183
This Booking.com deal was found by Cheapflights users on 9/2. 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 10/1411:52 am -
1 stop5h 34m
Fri 10/168:21 pm -
1 stop16h 08m
Deal found 9/2![Frontier logo]()
$184
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2611:45 am -
1 stop5h 44m
Wed 9/308:24 pm -
1 stop5h 23m
Deal found 9/3![Frontier logo]()
$186
This Booking.com deal was found by Cheapflights users on 9/2. 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 10/36:15 am -
1 stop11h 14m
Tue 10/138:21 pm -
1 stop16h 08m
Deal found 9/2![Frontier logo]()
$188
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2411:45 am -
1 stop5h 44m
Wed 9/308:24 pm -
1 stop16h 06m
Deal found 9/3![Frontier logo]()
$191
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2411:45 am -
1 stop5h 44m
Sat 9/268:24 pm -
1 stop5h 23m
Deal found 9/3![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 11/56:25 am -
1 stop11h 01m
Sat 11/78:21 pm -
1 stop5h 30m
Deal found 9/3![Frontier logo]()
$196
Best flights from Ontario to AustinDiscover carefully curated flight deals from Ontario to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
Discover carefully curated flight deals from Ontario to Austin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
This CheapOair deal was found by Cheapflights users on 9/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:30 pm -
1 stop22h 07m
Sun 9/2711:04 pm -
1 stop14h 18m
Deal found 9/5![Frontier logo]()
$269
This Southwest deal was found by Cheapflights users on 9/3. 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 1/51:25 pm -
2 stops5h 45m
Sat 1/96:55 am -
2 stops7h 00m
Deal found 9/3![Southwest logo]()
$317
This Delta deal was found by Cheapflights users on 9/1. 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 11/266:00 am -
1 stop5h 30m
Fri 12/46:10 pm -
1 stop7h 48m
Deal found 9/1![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 9/3. 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 9/241:24 pm -
1 stop5h 24m
Mon 9/285:39 pm -
1 stop6h 20m
Deal found 9/3![United Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 9/4. 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.
Wed 2/107:50 am -
Nonstop2h 35m
Wed 2/171:20 pm -
Nonstop3h 10m
Deal found 9/4![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 9/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3012:00 pm -
Nonstop2h 45m
Mon 11/27:15 pm -
1 stop4h 40m
Deal found 9/5![Southwest logo]()
$333
This Delta deal was found by Cheapflights users on 9/1. 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 1/141:00 pm -
1 stop6h 15m
Mon 1/187:25 pm -
1 stop6h 23m
Deal found 9/1![Delta logo]()
$373
This Southwest deal was found by Cheapflights users on 9/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:30 am -
Nonstop2h 50m
Thu 10/15:45 am -
1 stop6h 35m
Deal found 9/5![Southwest logo]()
$337
This Southwest deal was found by Cheapflights users on 9/2. 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 11/191:25 pm -
2 stops5h 45m
Sun 11/227:15 pm -
1 stop4h 40m
Deal found 9/2![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 9/1. 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 10/311:50 am -
1 stop4h 35m
Mon 10/511:45 am -
Nonstop3h 05m
Deal found 9/1![Southwest logo]()
$352
This Southwest deal was found by Cheapflights users on 9/4. 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.
Wed 9/301:15 pm -
1 stop7h 45m
Thu 10/15:15 am -
2 stops8h 00m
Deal found 9/4![Southwest logo]()
$352
Last-minute flights from Ontario to AustinDiscover last-minute flight deals from Ontario to Austin. Data last updated September 5, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Austin. Data last updated September 5, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 9/2. 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.
Thu 9/2411:45 am -
1 stop5h 44m
Mon 9/288:24 pm -
1 stop5h 23m
Deal found 9/2![Frontier logo]()
$177
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2411:45 am -
1 stop5h 44m
Wed 9/308:24 pm -
1 stop16h 06m
Deal found 9/3![Frontier logo]()
$191
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2411:45 am -
1 stop5h 44m
Sat 9/268:24 pm -
1 stop5h 23m
Deal found 9/3![Frontier logo]()
$194
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2611:45 am -
1 stop5h 44m
Mon 9/288:24 pm -
1 stop16h 06m
Deal found 9/3![Frontier logo]()
$183
This Booking.com deal was found by Cheapflights users on 9/3. 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 9/2611:45 am -
1 stop5h 44m
Wed 9/308:24 pm -
1 stop5h 23m
Deal found 9/3![Frontier logo]()
$186
This Booking.com deal was found by Cheapflights users on 9/2. 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 10/36:15 am -
1 stop11h 14m
Tue 10/138:21 pm -
1 stop16h 08m
Deal found 9/2![Frontier logo]()
$188
This Booking.com deal was found by Cheapflights users on 9/2. 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 10/1411:52 am -
1 stop5h 34m
Fri 10/168:21 pm -
1 stop16h 08m
Deal found 9/2![Frontier logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/276:25 am -
1 stop11h 01m
Tue 11/108:21 pm -
1 stop29h 30m
Deal found 9/3![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/276:25 am -
1 stop11h 01m
Mon 11/98:21 pm -
1 stop29h 30m
Deal found 9/3![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/276:25 am -
1 stop11h 01m
Sat 11/78:21 pm -
1 stop5h 30m
Deal found 9/3![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/276:25 am -
1 stop11h 01m
Thu 11/128:21 pm -
1 stop5h 30m
Deal found 9/3![Frontier logo]()
$198
One-way flights from Ontario to AustinSearch for one-way flight options from Ontario to Austin. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
Search for one-way flight options from Ontario to Austin. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
This Super.com deal was found by Cheapflights users on 9/2. 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 9/2611:45 am -
1 stop5h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$87
This Mytrip deal was found by Cheapflights users on 9/1. 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.
Tue 10/2011:52 am -
1 stop5h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 9/226:15 am -
1 stop11h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Wed 9/306:15 am -
1 stop11h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$91
This Super.com deal was found by Cheapflights users on 9/2. 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 11/76:25 am -
1 stop11h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$93
This Super.com deal was found by Cheapflights users on 9/4. 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 10/106:15 am -
1 stop11h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 9/2. 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.
Wed 10/2811:52 am -
1 stop5h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 9/2. 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 10/2711:52 am -
1 stop5h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$96
This Super.com deal was found by Cheapflights users on 9/3. 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.
Wed 10/1411:52 am -
1 stop5h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$98
Find flight deals from Ontario to Austin
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Austin (AUS). 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 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Expedia) |
One-way from | $87 (Super.com) |
Popular in | December |
Cheapest in | January |
Average price | $425 |
Good round-trip deal | $317 or less |
Good one-way deal | $193 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Austin 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 5, 2026.
Use the filters below to find and compare flights from Ontario to Austin that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Thu 11/26
2:01 pm-10:04 pm
1 stop6h 03m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$124
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Tue 12/8
4:46 pm-7:18 pm
1 stop24h 32m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$128
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Sat 2/27
12:00 pm-12:09 am
1 stop10h 09m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$154
Quickest round-trip
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Fri 10/2
12:05 pm-4:50 pm
Nonstop2h 45m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$160
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Fri 12/4
7:50 am-12:35 pm
Nonstop2h 45m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$164
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Fri 12/25
12:50 pm-9:25 pm
1 stop6h 35m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$174
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Fri 12/25
6:00 am-1:49 pm
1 stop5h 49m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$175
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Thu 3/4
6:00 am-2:57 pm
1 stop6h 57m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$179
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Thu 3/4
4:00 pm-8:45 pm
Nonstop2h 45m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$194
OntarioAustin
ONT Ontario - AUS Austin Bergstrom
ONTAUS
Ontario
Thu 2/11
6:00 am-1:09 pm
1 stop5h 09m
Austin Bergstrom
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$215
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Ontario to Austin
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 Austin in September.
| 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 Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Austin flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Austin flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Austin flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Austin 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-Austin 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 Austin
Have a flexible travel schedule? Discover the best time to fly to Austin from Ontario with our price prediction graph.
ONT-AUS
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 Ontario to Austin
Prices
More
How far ahead should I book a flight from Ontario to Austin?
Booking 33 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Austin. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Ontario to Austin?
Currently, January is the cheapest month in which you can book a flight from Ontario to Austin (average of $190). Flying from Ontario to Austin in December is currently the most expensive (average of $453). 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 ONT to AUS?
Find hourly flight availability from Ontario to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 5, 2026.
When flying from Ontario to Austin, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
What’s the top layover airport for flights from Ontario to Austin?
Share of 1-stop round-trip flights from Ontario to Austin chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to Austin on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to Austin?
Average round-trip fare for 1-stop flights from Ontario to Austin, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $190.
What’s the fastest layover option from Ontario to Austin?
Shortest average travel time for 1-stop one-way flights from Ontario to Austin, 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 26m.
Which airport typically offers the quickest layover for flights from Ontario to Austin?
Average layover duration for 1-stop one-way flights from Ontario to Austin, 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 57m.
Reviews of airlines servicing Austin
Get insights into the airlines that provide service to Austin. 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 Austin. Reviews last updated September 5, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Ontario to Austin by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from Ontario to Austin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Austin?
Book flights to Austin if you plan to visit one of these locationsRound Rock
Cedar Park
San Marcos
Bastrop
Fredericksburg
Pflugerville
Dripping Springs
Georgetown
Seguin
Canyon Lake
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Ontario and Austin flights
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Other flights from Ontario
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Top 6 airlines flying from Ontario to Austin
Discover the top 6 airlines that operate flights from Ontario to Austin. 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 September 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$276 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$150 | Average$269 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$242 | Average$416 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$246 | Average$440 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$247 | Average$456 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$256 | Average$337 | FlexibilityNo cancel fee | On-time69% |