$58+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
May 9 — May 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 Saturday
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 April 9, 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 April 9, 2026.
This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:47 am
ONT
- AUS
1 stop5h 57m
Frontier
Sun 5/2410:52 pm
AUS
- ONT
1 stop11h 12m
Frontier
Deal found 4/7![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 4/5. 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 4/2212:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Wed 6/310:28 am
AUS
- ONT
1 stop15h 21m
Frontier
Deal found 4/5![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/58:06 pm
ONT
- AUS
2 stops15h 27m
Frontier
Sun 6/710:52 pm
AUS
- ONT
1 stop18h 17m
Frontier
Deal found 4/7![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 4/275:33 pm
ONT
- AUS
1 stop21h 45m
Frontier
Tue 5/199:13 pm
AUS
- ONT
1 stop28h 36m
Frontier
Deal found 4/8![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 4/5. 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 4/2212:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Tue 6/210:52 pm
AUS
- ONT
1 stop18h 52m
Frontier
Deal found 4/5![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
ONT
- AUS
1 stop12h 18m
Frontier
Sun 5/2410:52 pm
AUS
- ONT
1 stop11h 12m
Frontier
Deal found 4/7![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 4/4. 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.
Wed 5/134:39 pm
ONT
- AUS
2 stops25h 39m
Frontier
Sat 5/169:13 pm
AUS
- ONT
1 stop14h 52m
Frontier
Deal found 4/4![Frontier logo]()
$231
This CheapOair deal was found by Cheapflights users on 4/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:59 am
ONT
- AUS
1 stop16h 56m
Frontier
Tue 4/216:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 4/6![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:05 pm
ONT
- AUS
2 stops25h 13m
Frontier
Mon 5/2510:52 pm
AUS
- ONT
1 stop11h 12m
Frontier
Deal found 4/7![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:21 am
ONT
- AUS
2 stops34h 31m
Frontier
Mon 5/189:13 pm
AUS
- ONT
1 stop14h 52m
Frontier
Deal found 4/7![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Fri 5/293:30 pm
ONT
- AUS
1 stop28h 17m
Frontier
Fri 6/510:52 pm
AUS
- ONT
1 stop18h 17m
Frontier
Deal found 4/6![Frontier logo]()
$235
This CheapOair deal was found by Cheapflights users on 4/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 am
ONT
- AUS
1 stop12h 18m
Frontier
Fri 6/128:15 pm
AUS
- ONT
1 stop15h 50m
Frontier
Deal found 4/6![Frontier logo]()
$236
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 April 9, 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 April 9, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/5. 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.
Tue 5/57:00 am
ONT
- AUS
1 stop7h 49m
Alaska Airlines
Wed 5/66:00 am
AUS
- ONT
1 stop10h 30m
Alaska Airlines
Deal found 4/5![Alaska Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 4/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- AUS
1 stop6h 00m
Delta
Tue 5/268:17 am
AUS
- ONT
1 stop6h 02m
Delta
Deal found 4/4![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 4/8. 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.
Fri 4/241:50 pm
ONT
- AUS
1 stop6h 55m
Southwest
Tue 5/195:20 pm
AUS
- ONT
2 stops6h 55m
Southwest
Deal found 4/8![Southwest logo]()
$282
This United Airlines deal was found by Cheapflights users on 4/6. 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.
Wed 7/155:45 am
ONT
- AUS
1 stop5h 27m
United Airlines
Sat 7/255:39 am
AUS
- ONT
2 stops8h 33m
United Airlines
Deal found 4/6![United Airlines logo]()
$282
This Delta deal was found by Cheapflights users on 4/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:29 pm
ONT
- AUS
1 stop6h 04m
Delta
Tue 5/268:17 am
AUS
- ONT
1 stop6h 02m
Delta
Deal found 4/4![Delta logo]()
$277
This Southwest deal was found by Cheapflights users on 4/6. 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.
Sat 4/255:30 am
ONT
- AUS
2 stops7h 45m
Southwest
Sun 4/269:25 pm
AUS
- ONT
1 stop4h 40m
Southwest
Deal found 4/6![Southwest logo]()
$282
This Southwest deal was found by Cheapflights users on 4/4. 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 5/711:55 am
ONT
- AUS
2 stops7h 05m
Southwest
Mon 5/115:30 am
AUS
- ONT
2 stops7h 25m
Southwest
Deal found 4/4![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 4/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2511:53 am
ONT
- AUS
1 stop9h 55m
Delta
Wed 5/208:17 am
AUS
- ONT
1 stop6h 02m
Delta
Deal found 4/7![Delta logo]()
$328
This Southwest deal was found by Cheapflights users on 4/4. 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 5/121:40 pm
ONT
- AUS
Nonstop2h 40m
Southwest
Sat 5/165:45 am
AUS
- ONT
1 stop4h 55m
Southwest
Deal found 4/4![Southwest logo]()
$309
This Southwest deal was found by Cheapflights users on 4/6. 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.
Mon 7/2712:45 pm
ONT
- AUS
1 stop6h 45m
Southwest
Wed 7/294:25 pm
AUS
- ONT
2 stops5h 55m
Southwest
Deal found 4/6![Southwest logo]()
$313
This Southwest deal was found by Cheapflights users on 4/8. 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.
Fri 4/2412:40 pm
ONT
- AUS
1 stop6h 35m
Southwest
Wed 5/205:20 pm
AUS
- ONT
2 stops6h 55m
Southwest
Deal found 4/8![Southwest logo]()
$332
Last-minute flights from Ontario to AustinDiscover last-minute flight deals from Ontario to Austin. Data last updated April 9, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Austin. Data last updated April 9, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 4/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:59 am
ONT
- AUS
1 stop16h 56m
Frontier
Tue 4/216:13 pm
AUS
- ONT
1 stop7h 42m
Frontier
Deal found 4/6![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 4/5. 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 4/2212:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Wed 6/310:28 am
AUS
- ONT
1 stop15h 21m
Frontier
Deal found 4/5![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 4/5. 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 4/2212:59 am
ONT
- AUS
1 stop7h 06m
Frontier
Tue 6/210:52 pm
AUS
- ONT
1 stop18h 52m
Frontier
Deal found 4/5![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:47 am
ONT
- AUS
1 stop5h 57m
Frontier
Sun 5/2410:52 pm
AUS
- ONT
1 stop11h 12m
Frontier
Deal found 4/7![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:21 am
ONT
- AUS
2 stops34h 31m
Frontier
Mon 5/189:13 pm
AUS
- ONT
1 stop14h 52m
Frontier
Deal found 4/7![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 4/275:33 pm
ONT
- AUS
1 stop21h 45m
Frontier
Tue 5/199:13 pm
AUS
- ONT
1 stop28h 36m
Frontier
Deal found 4/8![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:05 pm
ONT
- AUS
2 stops25h 13m
Frontier
Mon 5/2510:52 pm
AUS
- ONT
1 stop11h 12m
Frontier
Deal found 4/7![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:05 pm
ONT
- AUS
2 stops25h 13m
Frontier
Mon 5/189:13 pm
AUS
- ONT
1 stop28h 36m
Frontier
Deal found 4/7![Frontier logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 4/4. 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.
Wed 5/134:39 pm
ONT
- AUS
2 stops25h 39m
Frontier
Sat 5/169:13 pm
AUS
- ONT
1 stop14h 52m
Frontier
Deal found 4/4![Frontier logo]()
$231
This Frontier deal was found by Cheapflights users on 4/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
ONT
- AUS
1 stop12h 18m
Frontier
Sun 5/2410:52 pm
AUS
- ONT
1 stop11h 12m
Frontier
Deal found 4/7![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Fri 5/293:30 pm
ONT
- AUS
1 stop28h 17m
Frontier
Fri 6/510:52 pm
AUS
- ONT
1 stop18h 17m
Frontier
Deal found 4/6![Frontier logo]()
$235
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 April 9, 2026.
Search for one-way flight options from Ontario to Austin. Find affordable one-way fares based on user searches. Data last updated April 9, 2026.
This Trip.com deal was found by Cheapflights users on 4/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:00 am
ONT
- AUS
1 stop12h 18m
Frontier
Deal found 4/8![Frontier logo]()
$58
This Trip.com deal was found by Cheapflights users on 4/7. 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 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 4/7![Frontier logo]()
$60
This Trip.com deal was found by Cheapflights users on 4/6. 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 5/610:50 am
ONT
- AUS
1 stop7h 28m
Frontier
Deal found 4/6![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Fri 5/15:33 pm
ONT
- AUS
1 stop24h 22m
Frontier
Deal found 4/9![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/510:50 am
ONT
- AUS
1 stop7h 28m
Frontier
Deal found 4/7![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/31:39 pm
ONT
- AUS
1 stop19h 15m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$77
This Trip.com deal was found by Cheapflights users on 4/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:50 am
ONT
- AUS
1 stop7h 28m
Frontier
Deal found 4/7![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 4/6. 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 Frontier 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 4/6![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 4/6. 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.
Wed 6/36:00 am
ONT
- AUS
1 stop12h 18m
Frontier
Deal found 4/6![Frontier logo]()
$82
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 April 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $225 (Frontier) |
One-way from | $58 (Trip.com) |
Popular in | March |
Cheapest in | January |
Average price | $307 |
Good round-trip deal | $455 or less |
Good one-way deal | $273 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 April 9, 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
Tue 5/5
7:00 am-4:49 pm
1 stop7h 49m
Austin Bergstrom
Wed 5/6
6:00 am-2:30 pm
1 stop10h 30m
$277
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Tue 5/19
6:00 am-2:00 pm
1 stop6h 00m
Austin Bergstrom
Tue 5/26
8:17 am-12:19 pm
1 stop6h 02m
$277
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sat 5/16
1:29 pm-9:33 pm
1 stop6h 04m
Austin Bergstrom
Tue 5/26
8:17 am-12:19 pm
1 stop6h 02m
$277
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Fri 4/24
1:50 pm-10:45 pm
1 stop6h 55m
Austin Bergstrom
Tue 5/19
5:20 pm-10:15 pm
2 stops6h 55m
$282
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Wed 7/15
5:45 am-1:12 pm
1 stop5h 27m
Austin Bergstrom
Sat 7/25
5:39 am-12:12 pm
2 stops8h 33m
$282
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sat 4/25
5:30 am-3:15 pm
2 stops7h 45m
Austin Bergstrom
Sun 4/26
9:25 pm-12:05 am
1 stop4h 40m
$282
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 5/7
11:55 am-9:00 pm
2 stops7h 05m
Austin Bergstrom
Mon 5/11
5:30 am-10:55 am
2 stops7h 25m
$287
Quickest round-trip
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Tue 5/12
1:40 pm-6:20 pm
Nonstop2h 40m
Austin Bergstrom
Sat 5/16
5:45 am-8:40 am
1 stop4h 55m
$309
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Mon 7/27
12:45 pm-9:30 pm
1 stop6h 45m
Austin Bergstrom
Wed 7/29
4:25 pm-8:20 pm
2 stops5h 55m
$313
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sat 4/25
11:53 am-11:48 pm
1 stop9h 55m
Austin Bergstrom
Wed 5/20
8:17 am-12:19 pm
1 stop6h 02m
$328
Showing 1-10 of 23 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 April.
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| 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
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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 April 3, 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 $203). 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 April 9, 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 67% 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 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 April 9, 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.
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Comfort
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
Round Rock
Fredericksburg
Pflugerville
Georgetown
Bastrop
Dripping Springs
Seguin
Canyon Lake
Horseshoe Bay
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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 April 9, 2026.
Complete your trip
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Search flights from Ontario to Austin by cabin class
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Ontario and Austin flights
Browse other Ontario and Austin flight options. Last updated on April 9, 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 April 9, 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 April 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$120 | Average$299 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$139 | Average$221 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$401 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$240 | Average$408 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$312 | FlexibilityNo cancel fee | On-time69% |