$60+ Cheap flights from Ontario to Austin (ONT - AUS)
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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
Apr 9 — Apr 161
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 September, booked 87 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday
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 March 10, 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 March 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Wed 4/16:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Tue 4/77:00 am
AUS
- ONT
1 stop18h 56m
Frontier
Deal found 3/5![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Mon 4/1312:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Sat 4/188:50 pm
AUS
- ONT
1 stop12h 36m
Frontier
Deal found 3/6![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/316:15 am
ONT
- AUS
1 stop13h 35m
Frontier
Thu 4/211:00 am
AUS
- ONT
1 stop14h 56m
Frontier
Deal found 3/5![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Thu 4/26:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Tue 4/77:00 am
AUS
- ONT
1 stop18h 56m
Frontier
Deal found 3/5![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/66:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Mon 4/209:31 pm
AUS
- ONT
1 stop28h 24m
Frontier
Deal found 3/5![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Mon 4/1312:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Tue 4/216:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/8![Frontier logo]()
$157
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:20 am
ONT
- AUS
1 stop25h 45m
Frontier
Tue 4/146:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/5![Frontier logo]()
$159
This Trip.com deal was found by Cheapflights users on 3/6. 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.
Wed 4/2912:59 am
ONT
- AUS
1 stop17h 37m
Frontier
Wed 5/68:00 am
AUS
- ONT
1 stop17h 55m
Frontier
Deal found 3/6![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Wed 5/1312:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Mon 5/1811:01 am
AUS
- ONT
1 stop14h 54m
Frontier
Deal found 3/5![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Wed 4/156:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/9![Frontier logo]()
$164
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 March 10, 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 March 10, 2026.
This Southwest deal was found by Cheapflights users on 3/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 am
ONT
- AUS
1 stop8h 05m
Southwest
Tue 5/265:55 pm
AUS
- ONT
1 stop5h 55m
Southwest
Deal found 3/9![Southwest logo]()
$209
This Delta deal was found by Cheapflights users on 3/8. 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.
Sat 4/1812:49 pm
ONT
- AUS
1 stop9h 28m
Delta
Tue 4/216:45 pm
AUS
- ONT
1 stop6h 59m
Delta
Deal found 3/8![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 3/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/45:10 am
ONT
- AUS
1 stop5h 58m
United Airlines
Tue 4/710:50 am
AUS
- ONT
2 stops9h 12m
United Airlines
Deal found 3/6![United Airlines logo]()
$242
This Alaska Airlines deal was found by Cheapflights users on 3/5. 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 5/2711:15 am
ONT
- AUS
1 stop10h 24m
Alaska Airlines
Tue 6/25:48 pm
AUS
- ONT
1 stop8h 08m
Alaska Airlines
Deal found 3/5![Alaska Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 3/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/511:52 am
ONT
- AUS
1 stop10h 05m
Delta
Fri 6/1212:30 pm
AUS
- ONT
1 stop5h 44m
Delta
Deal found 3/5![Delta logo]()
$268
This Southwest deal was found by Cheapflights users on 3/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:55 am
ONT
- AUS
2 stops7h 05m
Southwest
Mon 4/276:00 am
AUS
- ONT
1 stop8h 00m
Southwest
Deal found 3/9![Southwest logo]()
$282
This Southwest deal was found by Cheapflights users on 3/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1710:10 am
ONT
- AUS
2 stops7h 50m
Southwest
Sun 6/215:35 am
AUS
- ONT
1 stop5h 45m
Southwest
Deal found 3/8![Southwest logo]()
$282
This United Airlines deal was found by Cheapflights users on 3/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:00 am
ONT
- AUS
2 stops8h 54m
United Airlines
Sat 4/187:00 am
AUS
- ONT
2 stops12h 47m
United Airlines
Deal found 3/8![United Airlines logo]()
$327
This Southwest deal was found by Cheapflights users on 3/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:55 am
ONT
- AUS
1 stop5h 20m
Southwest
Tue 6/211:10 am
AUS
- ONT
Nonstop3h 05m
Southwest
Deal found 3/9![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 3/9. 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.
Sat 7/116:00 am
ONT
- AUS
1 stop6h 49m
Delta
Sat 7/188:10 am
AUS
- ONT
1 stop6h 19m
Delta
Deal found 3/9![Delta logo]()
$358
This Southwest deal was found by Cheapflights users on 3/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:20 am
ONT
- AUS
Nonstop2h 40m
Southwest
Sun 4/199:25 pm
AUS
- ONT
1 stop4h 40m
Southwest
Deal found 3/9![Southwest logo]()
$301
This Southwest deal was found by Cheapflights users on 3/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:55 am
ONT
- AUS
2 stops7h 05m
Southwest
Thu 4/305:30 am
AUS
- ONT
2 stops7h 25m
Southwest
Deal found 3/6![Southwest logo]()
$316
Last-minute flights from Ontario to AustinDiscover last-minute flight deals from Ontario to Austin. Data last updated March 10, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Austin. Data last updated March 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Tue 3/316:15 am
ONT
- AUS
1 stop13h 35m
Frontier
Thu 4/211:00 am
AUS
- ONT
1 stop14h 56m
Frontier
Deal found 3/5![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Wed 4/16:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Tue 4/77:00 am
AUS
- ONT
1 stop18h 56m
Frontier
Deal found 3/5![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Thu 4/26:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Tue 4/77:00 am
AUS
- ONT
1 stop18h 56m
Frontier
Deal found 3/5![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 4/66:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Mon 4/209:31 pm
AUS
- ONT
1 stop28h 24m
Frontier
Deal found 3/5![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Wed 4/156:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/9![Frontier logo]()
$164
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:20 am
ONT
- AUS
1 stop25h 45m
Frontier
Tue 4/146:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/5![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Mon 4/1312:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Sat 4/188:50 pm
AUS
- ONT
1 stop12h 36m
Frontier
Deal found 3/6![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 3/8. 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.
Mon 4/1312:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Tue 4/216:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/8![Frontier logo]()
$157
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:44 pm
ONT
- AUS
1 stop22h 00m
Frontier
Wed 4/226:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 3/5![Frontier logo]()
$172
This Trip.com deal was found by Cheapflights users on 3/6. 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.
Wed 4/2912:59 am
ONT
- AUS
1 stop17h 37m
Frontier
Wed 5/68:00 am
AUS
- ONT
1 stop17h 55m
Frontier
Deal found 3/6![Frontier logo]()
$160
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 March 10, 2026.
Search for one-way flight options from Ontario to Austin. Find affordable one-way fares based on user searches. Data last updated March 10, 2026.
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1312:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Deal found 3/5![Frontier logo]()
$60
This Trip.com deal was found by Cheapflights users on 3/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2712:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Deal found 3/10![Frontier logo]()
$73
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Deal found 3/9![Frontier logo]()
$74
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:59 am
ONT
- AUS
1 stop14h 19m
Frontier
Deal found 3/9![Frontier logo]()
$77
This Trip.com deal was found by Cheapflights users on 3/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:59 am
ONT
- AUS
1 stop17h 47m
Frontier
Deal found 3/5![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 3/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1112:59 am
ONT
- AUS
1 stop21h 22m
Frontier
Deal found 3/10![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/412:59 am
ONT
- AUS
1 stop21h 22m
Frontier
Deal found 3/9![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Sun 5/312:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Deal found 3/5![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 3/5. 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.
Thu 4/26:20 am
ONT
- AUS
1 stop16h 01m
Frontier
Deal found 3/5![Frontier logo]()
$85
This Super.com deal was found by Cheapflights users on 3/5. 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.
Sun 4/2612:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Deal found 3/5![Frontier logo]()
$89
This Booking.com deal was found by Cheapflights users on 3/5. 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.
Mon 4/2011:44 am
ONT
- AUS
1 stop6h 00m
Frontier
Deal found 3/5![Frontier logo]()
$90
This American Airlines deal was found by Cheapflights users on 3/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/412:26 pm
ONT
- AUS
1 stop6h 07m
American Airlines
Deal found 3/7![American Airlines logo]()
$91
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 March 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $136 (Kiwi.com) |
One-way from | $60 (Trip.com) |
Popular in | December |
Cheapest in | January |
Average price | $447 |
Good round-trip deal | $416 or less |
Good one-way deal | $258 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 2,558,603 searches. Data last updated March 10, 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 - AUS
ONTAUS
Ontario
Sat 5/23
6:00 am-4:05 pm
1 stop8h 05m
Austin Bergstrom
Tue 5/26
5:55 pm-9:50 pm
1 stop5h 55m
$209
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sat 4/18
12:49 pm-12:17 am
1 stop9h 28m
Austin Bergstrom
Tue 4/21
6:45 pm-11:44 pm
1 stop6h 59m
$237
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sat 4/4
5:10 am-1:08 pm
1 stop5h 58m
Austin Bergstrom
Tue 4/7
10:50 am-6:02 pm
2 stops9h 12m
$242
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Fri 6/5
11:52 am-11:57 pm
1 stop10h 05m
Austin Bergstrom
Fri 6/12
12:30 pm-4:14 pm
1 stop5h 44m
$268
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 4/23
11:55 am-9:00 pm
2 stops7h 05m
Austin Bergstrom
Mon 4/27
6:00 am-12:00 pm
1 stop8h 00m
$282
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Wed 6/17
10:10 am-8:00 pm
2 stops7h 50m
Austin Bergstrom
Sun 6/21
5:35 am-9:20 am
1 stop5h 45m
$282
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Wed 5/27
6:55 am-2:15 pm
1 stop5h 20m
Austin Bergstrom
Tue 6/2
11:10 am-12:15 pm
Nonstop3h 05m
$287
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Wed 5/27
11:15 am-11:39 pm
1 stop10h 24m
Austin Bergstrom
Tue 6/2
5:48 pm-11:56 pm
1 stop8h 08m
$297
Quickest round-trip
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 4/16
9:20 am-2:00 pm
Nonstop2h 40m
Austin Bergstrom
Sun 4/19
9:25 pm-12:05 am
1 stop4h 40m
$301
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 4/16
11:55 am-9:00 pm
2 stops7h 05m
Austin Bergstrom
Thu 4/30
5:30 am-10:55 am
2 stops7h 25m
$316
Showing 1-10 of 24 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 March.
| 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 | |
| Price Accuracy3 stars | 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?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to Austin. Price data was last updated on March 6, 2026.
Booking 87 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, September is the cheapest month in which you can book a flight from Ontario to Austin (average of $58). Flying from Ontario to Austin in March is currently the most expensive (average of $135). 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 March 10, 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.
Denver (DEN) – chosen by Cheapflights users on 73% 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 $233.
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 29m.
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 51m.
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 March 10, 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
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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 locationsCedar Park
San Marcos
Fredericksburg
Round Rock
Georgetown
Bastrop
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Ontario to Austin
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Other flights to Austin
Explore flights to Austin departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 10, 2026.
Complete your trip
Complete your trip to Austin by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Austin by cabin class
Find flights from Ontario to Austin, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Austin flights
Browse other Ontario and Austin flight options. Last updated on March 10, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on March 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Ontario to Austin
Discover the top 5 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 2,558,603 searches. Data last updated March 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$120 | Average$312 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$141 | Average$223 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$150 | Average$332 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$236 | Average$411 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$238 | Average$396 | FlexibilityNo cancel fee | On-time63% |