$92+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
Aug 10 — Aug 171
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 90 days in advance, depart on a Wednesday or Tuesday 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 July 11, 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 July 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:08 pm
ONT
- AUS
2 stops23h 40m
Frontier
Sat 8/157:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
Deal found 7/11![Frontier logo]()
$248
This Frontier deal was found by Cheapflights users on 7/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:17 pm
ONT
- AUS
1 stop11h 35m
Frontier
Tue 9/88:15 pm
AUS
- ONT
1 stop5h 35m
Frontier
Deal found 7/8![Frontier logo]()
$249
This Travelocity deal was found by Cheapflights users on 7/6. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
ONT
- AUS
1 stop16h 07m
Frontier
Tue 7/288:12 pm
AUS
- ONT
1 stop15h 52m
Frontier
Deal found 7/6![Frontier logo]()
$250
This American Airlines deal was found by Cheapflights users on 7/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:59 pm
ONT
- AUS
1 stop8h 49m
American Airlines
Tue 8/112:34 pm
AUS
- ONT
1 stop5h 41m
American Airlines
Deal found 7/10![American Airlines logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 7/9. 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 8/2410:49 am
ONT
- AUS
1 stop6h 41m
Frontier
Thu 8/276:15 am
AUS
- ONT
2 stops12h 07m
Frontier
Deal found 7/9![Frontier logo]()
$252
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/209:15 am
ONT
- AUS
1 stop6h 35m
Southwest
Fri 10/234:45 pm
AUS
- ONT
2 stops7h 20m
Southwest
Deal found 7/7![Southwest logo]()
$253
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:50 am
ONT
- AUS
2 stops6h 55m
Southwest
Sat 8/221:40 pm
AUS
- ONT
2 stops8h 25m
Southwest
Deal found 7/7![Southwest logo]()
$254
This Booking.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
ONT
- AUS
1 stop16h 07m
Frontier
Thu 7/3012:47 pm
AUS
- ONT
1 stop5h 07m
Frontier
Deal found 7/6![Frontier logo]()
$257
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:49 am
ONT
- AUS
1 stop10h 52m
Frontier
Sat 8/2212:47 pm
AUS
- ONT
1 stop5h 07m
Frontier
Deal found 7/9![Frontier logo]()
$258
This Booking.com deal was found by Cheapflights users on 7/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/810:49 am
ONT
- AUS
1 stop6h 09m
Frontier
Mon 8/1012:47 pm
AUS
- ONT
1 stop5h 07m
Frontier
Deal found 7/10![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:49 am
ONT
- AUS
1 stop5h 59m
Frontier
Tue 8/117:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
Deal found 7/11![Frontier logo]()
$260
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 July 11, 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 July 11, 2026.
This Southwest deal was found by Cheapflights users on 7/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:30 am
ONT
- AUS
Nonstop2h 50m
Southwest
Fri 9/2511:00 am
AUS
- ONT
Nonstop3h 00m
Southwest
Deal found 7/10![Southwest logo]()
$301
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Thu 8/136:08 am
ONT
- AUS
1 stop6h 04m
United Airlines
Wed 8/195:30 am
AUS
- ONT
2 stops9h 20m
United Airlines
Deal found 7/6![United Airlines logo]()
$372
This KAYAK deal was found by Cheapflights users on 7/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/32:15 pm
ONT
- AUS
1 stop6h 24m
American Airlines
Wed 8/56:00 am
AUS
- ONT
1 stop5h 34m
American Airlines
Deal found 7/10![American Airlines logo]()
$449
This Alaska Airlines deal was found by Cheapflights users on 7/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:12 am
ONT
- AUS
1 stop7h 37m
Alaska Airlines
Sun 9/135:52 pm
AUS
- ONT
2 stops19h 24m
Alaska Airlines
Deal found 7/10![Alaska Airlines logo]()
$465
This Southwest deal was found by Cheapflights users on 7/8. 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.
Sat 8/19:50 am
ONT
- AUS
1 stop6h 50m
Southwest
Mon 8/38:10 pm
AUS
- ONT
Nonstop2h 55m
Southwest
Deal found 7/8![Southwest logo]()
$312
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:50 am
ONT
- AUS
1 stop6h 40m
Southwest
Wed 8/1210:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
Deal found 7/7![Southwest logo]()
$357
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Thu 9/31:18 pm
ONT
- AUS
2 stops7h 56m
United Airlines
Mon 9/75:44 pm
AUS
- ONT
1 stop6h 15m
United Airlines
Deal found 7/8![United Airlines logo]()
$426
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/48:30 am
ONT
- AUS
Nonstop2h 50m
Southwest
Tue 8/1110:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
Deal found 7/7![Southwest logo]()
$358
This United Airlines deal was found by Cheapflights users on 7/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:39 pm
ONT
- AUS
2 stops12h 00m
United Airlines
Wed 8/125:30 am
AUS
- ONT
2 stops8h 42m
United Airlines
Deal found 7/7![United Airlines logo]()
$448
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/612:15 pm
ONT
- AUS
2 stops7h 30m
Southwest
Sat 9/191:15 pm
AUS
- ONT
2 stops6h 05m
Southwest
Deal found 7/7![Southwest logo]()
$378
This Southwest deal was found by Cheapflights users on 7/8. 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.
Thu 8/2012:35 pm
ONT
- AUS
2 stops7h 15m
Southwest
Sun 8/235:35 am
AUS
- ONT
2 stops8h 00m
Southwest
Deal found 7/8![Southwest logo]()
$449
This Southwest deal was found by Cheapflights users on 7/8. 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 9/1112:35 pm
ONT
- AUS
2 stops7h 15m
Southwest
Sun 9/135:35 am
AUS
- ONT
2 stops8h 00m
Southwest
Deal found 7/8![Southwest logo]()
$478
Last-minute flights from Ontario to AustinDiscover last-minute flight deals from Ontario to Austin. Data last updated July 11, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Austin. Data last updated July 11, 2026 and is based on user searches.
This Travelocity deal was found by Cheapflights users on 7/6. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
ONT
- AUS
1 stop16h 07m
Frontier
Tue 7/288:12 pm
AUS
- ONT
1 stop15h 52m
Frontier
Deal found 7/6![Frontier logo]()
$250
This Booking.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
ONT
- AUS
1 stop16h 07m
Frontier
Thu 7/3012:47 pm
AUS
- ONT
1 stop5h 07m
Frontier
Deal found 7/6![Frontier logo]()
$257
This Frontier deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:49 am
ONT
- AUS
1 stop5h 59m
Frontier
Tue 8/117:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
Deal found 7/11![Frontier logo]()
$260
This Frontier deal was found by Cheapflights users on 7/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:49 am
ONT
- AUS
1 stop5h 59m
Frontier
Mon 8/106:30 am
AUS
- ONT
1 stop5h 34m
Frontier
Deal found 7/10![Frontier logo]()
$263
This American Airlines deal was found by Cheapflights users on 7/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:59 pm
ONT
- AUS
1 stop8h 49m
American Airlines
Tue 8/112:34 pm
AUS
- ONT
1 stop5h 41m
American Airlines
Deal found 7/10![American Airlines logo]()
$251
This Booking.com deal was found by Cheapflights users on 7/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/810:49 am
ONT
- AUS
1 stop6h 09m
Frontier
Mon 8/1012:47 pm
AUS
- ONT
1 stop5h 07m
Frontier
Deal found 7/10![Frontier logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:08 pm
ONT
- AUS
2 stops23h 40m
Frontier
Sat 8/157:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
Deal found 7/11![Frontier logo]()
$248
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:50 am
ONT
- AUS
2 stops6h 55m
Southwest
Sat 8/221:40 pm
AUS
- ONT
2 stops8h 25m
Southwest
Deal found 7/7![Southwest logo]()
$254
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:49 am
ONT
- AUS
1 stop10h 52m
Frontier
Sat 8/2212:47 pm
AUS
- ONT
1 stop5h 07m
Frontier
Deal found 7/9![Frontier logo]()
$258
This Frontier deal was found by Cheapflights users on 7/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Fri 8/2812:47 pm
AUS
- ONT
1 stop5h 35m
Frontier
Deal found 7/8![Frontier logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 7/9. 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 8/2410:49 am
ONT
- AUS
1 stop6h 41m
Frontier
Thu 8/276:15 am
AUS
- ONT
2 stops12h 07m
Frontier
Deal found 7/9![Frontier logo]()
$252
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 July 11, 2026.
Search for one-way flight options from Ontario to Austin. Find affordable one-way fares based on user searches. Data last updated July 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/92:58 pm
ONT
- AUS
1 stop18h 38m
Frontier
Deal found 7/11![Frontier logo]()
$92
This Trip.com deal was found by Cheapflights users on 7/9. 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.
Thu 9/1711:16 am
ONT
- AUS
1 stop7h 49m
Frontier
Deal found 7/9![Frontier logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:16 am
ONT
- AUS
1 stop7h 49m
Frontier
Deal found 7/11![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 7/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/56:00 am
ONT
- AUS
1 stop5h 30m
Frontier
Deal found 7/9![Frontier logo]()
$105
This American Airlines deal was found by Cheapflights users on 7/7. 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.
Fri 8/72:27 pm
ONT
- AUS
1 stop6h 08m
American Airlines
Deal found 7/7![American Airlines logo]()
$108
This Southwest deal was found by Cheapflights users on 7/9. 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.
Tue 8/41:15 pm
ONT
- AUS
1 stop7h 40m
Southwest
Deal found 7/9![Southwest logo]()
$109
This Booking.com deal was found by Cheapflights users on 7/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:56 pm
ONT
- AUS
1 stop21h 34m
Frontier
Deal found 7/10![Frontier logo]()
$111
This Southwest deal was found by Cheapflights users on 7/6. 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 9/510:15 am
ONT
- AUS
2 stops6h 50m
Southwest
Deal found 7/6![Southwest logo]()
$113
This Southwest deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:50 pm
ONT
- AUS
Nonstop2h 50m
Southwest
Deal found 7/7![Southwest logo]()
$114
This Booking.com deal was found by Cheapflights users on 7/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am
ONT
- AUS
1 stop15h 41m
Frontier
Deal found 7/7![Frontier logo]()
$116
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 July 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $248 (Southwest) |
One-way from | $92 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $300 |
Good round-trip deal | $439 or less |
Good one-way deal | $259 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 July 11, 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
Quickest round-trip
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Tue 9/22
8:30 am-1:20 pm
Nonstop2h 50m
Austin Bergstrom
Fri 9/25
11:00 am-12:00 pm
Nonstop3h 00m
$301
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sat 8/1
9:50 am-6:40 pm
1 stop6h 50m
Austin Bergstrom
Mon 8/3
8:10 pm-9:05 pm
Nonstop2h 55m
$312
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Mon 8/3
5:50 am-2:30 pm
1 stop6h 40m
Austin Bergstrom
Wed 8/12
10:50 am-11:50 am
Nonstop3h 00m
$357
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Tue 8/4
8:30 am-1:20 pm
Nonstop2h 50m
Austin Bergstrom
Tue 8/11
10:50 am-11:50 am
Nonstop3h 00m
$358
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 8/13
6:08 am-2:12 pm
1 stop6h 04m
Austin Bergstrom
Wed 8/19
5:30 am-12:50 pm
2 stops9h 20m
$372
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Sun 9/6
12:15 pm-9:45 pm
2 stops7h 30m
Austin Bergstrom
Sat 9/19
1:15 pm-5:20 pm
2 stops6h 05m
$378
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 9/3
1:18 pm-11:14 pm
2 stops7h 56m
Austin Bergstrom
Mon 9/7
5:44 pm-9:59 pm
1 stop6h 15m
$426
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Mon 8/3
6:39 pm-8:39 am
2 stops12h 00m
Austin Bergstrom
Wed 8/12
5:30 am-12:12 pm
2 stops8h 42m
$448
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Mon 8/3
2:15 pm-10:39 pm
1 stop6h 24m
Austin Bergstrom
Wed 8/5
6:00 am-9:34 am
1 stop5h 34m
$449
OntarioAustin
ONT - AUS
ONTAUS
Ontario
Thu 8/20
12:35 pm-9:50 pm
2 stops7h 15m
Austin Bergstrom
Sun 8/23
5:35 am-11:35 am
2 stops8h 00m
$449
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 July.
| 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
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How far ahead should I book a flight from Ontario to Austin?
Booking 89 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 July 11, 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 July 11, 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.
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
7.9
Boarding
8.1
Comfort
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
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of 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 July 11, 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 July 11, 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 July 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 2,558,603 searches. Data last updated July 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$276 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$139 | Average$249 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$443 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$242 | Average$417 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$246 | Average$438 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$310 | FlexibilityNo cancel fee | On-time69% |