$91+ Cheap flights from Austin to Ontario (AUS - ONT)
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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ONT
8月 7 — 8月 141
Round-trip
1 adult, Economy
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Find cheap flights from Austin to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Austin Bergstrom to Ontario are usually found in May or September, booked 56 days in advance, depart on a Monday or Tuesday and return on a Wednesday
Cheap flight deals from Austin to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Austin to OntarioExplore the most affordable flight options available from Austin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7月 8, 2026.
Explore the most affordable flight options available from Austin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7月 8, 2026.
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.
週三 8/510:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
週三 8/128:30 am
ONT
- AUS
Nonstop2h 50m
Southwest
Deal found 7/7![Southwest logo]()
$196
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 8/198:15 pm
AUS
- ONT
1 stop5h 35m
Frontier
週三 8/266:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Deal found 7/6![Frontier logo]()
$210
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.
週六 9/55:20 pm
AUS
- ONT
1 stop5h 30m
Southwest
週六 9/122:55 pm
ONT
- AUS
1 stop4h 35m
Southwest
Deal found 7/7![Southwest logo]()
$216
This Booking.com deal was found by Cheapflights users on 7/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 8/126:30 am
AUS
- ONT
1 stop5h 34m
Frontier
週三 8/121:38 pm
ONT
- AUS
1 stop20h 14m
Frontier
Deal found 7/4![Frontier logo]()
$217
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 7/288:12 pm
AUS
- ONT
1 stop15h 52m
Frontier
週三 8/121:38 pm
ONT
- AUS
1 stop20h 14m
Frontier
Deal found 7/7![Frontier logo]()
$220
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.
週二 8/410:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
週二 8/111:10 pm
ONT
- AUS
1 stop6h 50m
Southwest
Deal found 7/7![Southwest logo]()
$226
This Booking.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 7/296:30 am
AUS
- ONT
1 stop5h 34m
Frontier
週二 8/410:49 am
ONT
- AUS
1 stop6h 38m
Frontier
Deal found 7/3![Frontier logo]()
$227
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 8/87:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
週二 8/186:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Deal found 7/3![Frontier logo]()
$229
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 8/86:30 am
AUS
- ONT
1 stop5h 34m
Frontier
週二 8/1110:49 am
ONT
- AUS
1 stop5h 59m
Frontier
Deal found 7/7![Frontier logo]()
$231
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週一 8/176:30 am
AUS
- ONT
1 stop5h 34m
Frontier
週二 8/256:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Deal found 7/6![Frontier logo]()
$234
Best flights from Austin to OntarioDiscover carefully curated flight deals from Austin to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 7月 8, 2026.
Discover carefully curated flight deals from Austin to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 7月 8, 2026.
This Southwest deal was found by Cheapflights users on 7/4. 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.
週三 8/54:30 pm
AUS
- ONT
1 stop7h 35m
Southwest
週二 8/118:30 am
ONT
- AUS
Nonstop2h 50m
Southwest
Deal found 7/4![Southwest logo]()
$247
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 9/236:13 pm
AUS
- ONT
1 stop7h 34m
Delta
週一 9/289:52 am
ONT
- AUS
1 stop5h 19m
Delta
Deal found 7/6![Delta logo]()
$277
This United Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 8/258:50 am
AUS
- ONT
2 stops11h 21m
United Airlines
週三 8/266:08 am
ONT
- AUS
1 stop8h 25m
United Airlines
Deal found 7/4![United Airlines logo]()
$352
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 9/256:13 pm
AUS
- ONT
1 stop7h 34m
Delta
週一 9/289:52 am
ONT
- AUS
1 stop5h 19m
Delta
Deal found 7/6![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 8/283:33 pm
AUS
- ONT
1 stop9h 02m
United Airlines
週三 9/29:01 am
ONT
- AUS
2 stops12h 13m
United Airlines
Deal found 7/3![United Airlines logo]()
$372
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.
週五 10/911:45 am
AUS
- ONT
Nonstop3h 05m
Southwest
週日 10/115:10 pm
ONT
- AUS
1 stop5h 50m
Southwest
Deal found 7/7![Southwest logo]()
$373
This Delta deal was found by Cheapflights users on 7/4. 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.
週六 8/16:04 pm
AUS
- ONT
1 stop6h 19m
Delta
週六 8/156:00 am
ONT
- AUS
1 stop5h 09m
Delta
Deal found 7/4![Delta logo]()
$368
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.
週五 9/1111:00 am
AUS
- ONT
Nonstop3h 00m
Southwest
週日 9/136:00 am
ONT
- AUS
1 stop8h 25m
Southwest
Deal found 7/7![Southwest logo]()
$373
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 8/2812:12 pm
AUS
- ONT
2 stops9h 49m
United Airlines
週六 8/2911:00 am
ONT
- AUS
2 stops10h 14m
United Airlines
Deal found 7/3![United Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 7/4. 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.
週二 7/282:30 pm
AUS
- ONT
Nonstop2h 55m
Southwest
週二 8/42:15 pm
ONT
- AUS
1 stop5h 05m
Southwest
Deal found 7/4![Southwest logo]()
$388
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週五 8/287:15 am
AUS
- ONT
1 stop6h 57m
United Airlines
週一 8/317:13 pm
ONT
- AUS
2 stops11h 24m
United Airlines
Deal found 7/3![United Airlines logo]()
$388
Last-minute flights from Austin to OntarioDiscover last-minute flight deals from Austin to Ontario. Data last updated 7月 8, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Ontario. Data last updated 7月 8, 2026 and is based on user searches.
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 7/288:12 pm
AUS
- ONT
1 stop15h 52m
Frontier
週三 8/121:38 pm
ONT
- AUS
1 stop20h 14m
Frontier
Deal found 7/7![Frontier logo]()
$220
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.
週四 7/308:12 pm
AUS
- ONT
1 stop5h 38m
Frontier
週三 8/56:00 am
ONT
- AUS
1 stop5h 30m
Frontier
Deal found 7/8![Frontier logo]()
$239
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.
週二 8/410:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
週二 8/111:10 pm
ONT
- AUS
1 stop6h 50m
Southwest
Deal found 7/7![Southwest logo]()
$226
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.
週三 8/510:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
週三 8/128:30 am
ONT
- AUS
Nonstop2h 50m
Southwest
Deal found 7/7![Southwest logo]()
$196
This Southwest deal was found by Cheapflights users on 7/4. 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.
週三 8/510:50 am
AUS
- ONT
Nonstop3h 00m
Southwest
週二 8/118:30 am
ONT
- AUS
Nonstop2h 50m
Southwest
Deal found 7/4![Southwest logo]()
$237
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 8/87:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
週三 8/196:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Deal found 7/3![Frontier logo]()
$229
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 8/86:30 am
AUS
- ONT
1 stop5h 34m
Frontier
週二 8/1110:49 am
ONT
- AUS
1 stop5h 59m
Frontier
Deal found 7/7![Frontier logo]()
$231
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週一 8/102:25 pm
AUS
- ONT
1 stop21h 39m
Frontier
週二 8/186:00 am
ONT
- AUS
1 stop15h 41m
Frontier
Deal found 7/7![Frontier logo]()
$235
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.
週二 8/117:43 pm
AUS
- ONT
1 stop6h 07m
Frontier
週二 8/186:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Deal found 7/8![Frontier logo]()
$210
This Booking.com deal was found by Cheapflights users on 7/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 8/126:30 am
AUS
- ONT
1 stop5h 34m
Frontier
週三 8/121:38 pm
ONT
- AUS
1 stop20h 14m
Frontier
Deal found 7/4![Frontier logo]()
$217
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.
週三 8/198:15 pm
AUS
- ONT
1 stop5h 35m
Frontier
週一 8/246:00 am
ONT
- AUS
1 stop11h 30m
Frontier
Deal found 7/8![Frontier logo]()
$234
One-way flights from Austin to OntarioSearch for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated 7月 8, 2026.
Search for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated 7月 8, 2026.
This Trip.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 10/246:15 am
AUS
- ONT
1 stop19h 40m
Frontier
Deal found 7/3![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 9/298:16 pm
AUS
- ONT
1 stop19h 41m
Frontier
Deal found 7/3![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 9/18:15 pm
AUS
- ONT
1 stop15h 49m
Frontier
Deal found 7/3![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週一 8/32:25 pm
AUS
- ONT
1 stop21h 39m
Frontier
Deal found 7/3![Frontier logo]()
$97
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.
週二 10/65:30 pm
AUS
- ONT
Nonstop3h 05m
Southwest
Deal found 7/7![Southwest logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週二 8/48:12 pm
AUS
- ONT
1 stop15h 52m
Frontier
Deal found 7/3![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週六 10/36:45 am
AUS
- ONT
1 stop9h 12m
Frontier
Deal found 7/3![Frontier logo]()
$102
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 8/56:30 am
AUS
- ONT
1 stop5h 34m
Frontier
Deal found 7/7![Frontier logo]()
$104
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 8/126:30 am
AUS
- ONT
1 stop5h 34m
Frontier
Deal found 7/7![Frontier logo]()
$105
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.
週六 9/55:20 pm
AUS
- ONT
1 stop5h 30m
Southwest
Deal found 7/7![Southwest logo]()
$108
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
週三 10/76:45 am
AUS
- ONT
1 stop9h 12m
Frontier
Deal found 7/7![Frontier logo]()
$111
Find flight deals from Austin to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7月 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $196 (Southwest) |
One-way from | $91 (Trip.com) |
Popular in | December |
Cheapest in | May |
Average price | $312 |
Good round-trip deal | $357 or less |
Good one-way deal | $163 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Austin to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated 7月 8, 2026.
Use the filters below to find and compare flights from Austin to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週三 8/5
4:30 pm-10:05 pm
1 stop7h 35m
Ontario
週二 8/11
8:30 am-1:20 pm
Nonstop2h 50m
$247
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週三 9/23
6:13 pm-11:47 pm
1 stop7h 34m
Ontario
週一 9/28
9:52 am-5:11 pm
1 stop5h 19m
$277
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週五 9/25
6:13 pm-11:47 pm
1 stop7h 34m
Ontario
週一 9/28
9:52 am-5:11 pm
1 stop5h 19m
$297
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週二 8/25
8:50 am-6:11 pm
2 stops11h 21m
Ontario
週三 8/26
6:08 am-4:33 pm
1 stop8h 25m
$352
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週六 8/1
6:04 pm-10:23 pm
1 stop6h 19m
Ontario
週六 8/15
6:00 am-1:09 pm
1 stop5h 09m
$368
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週五 8/28
3:33 pm-10:35 pm
1 stop9h 02m
Ontario
週三 9/2
9:01 am-11:14 pm
2 stops12h 13m
$372
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週五 10/9
11:45 am-12:50 pm
Nonstop3h 05m
Ontario
週日 10/11
5:10 pm-1:00 am
1 stop5h 50m
$373
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週五 9/11
11:00 am-12:00 pm
Nonstop3h 00m
Ontario
週日 9/13
6:00 am-4:25 pm
1 stop8h 25m
$373
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週五 8/28
12:12 pm-8:01 pm
2 stops9h 49m
Ontario
週六 8/29
11:00 am-11:14 pm
2 stops10h 14m
$377
Quickest round-trip
AustinOntario
AUS - ONT
AUSONT
Austin Bergstrom
週二 7/28
2:30 pm-3:25 pm
Nonstop2h 55m
Ontario
週二 8/4
2:15 pm-9:20 pm
1 stop5h 05m
$388
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Austin to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Austin to Ontario in 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 Accuracy- | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Austin-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Austin-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Austin-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Austin-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Austin-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Austin to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Austin with our price prediction graph.
AUS-ONT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Austin to Ontario
Prices
More
How far ahead should I book a flight from Austin to Ontario?
To ensure you get the cheapest price possible for a flight from Austin to Ontario, you should look to book at least 55 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Austin to Ontario?
Currently, May is the cheapest month in which you can book a flight from Austin to Ontario (average of $276). Flying from Austin to Ontario in December is currently the most expensive (average of $448). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from AUS to ONT?
Find hourly flight availability from Austin to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7月 8, 2026.
When flying from Austin to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 8% versus a flight in the afternoon.
What’s the top layover airport for flights from Austin to Ontario?
Share of 1-stop round-trip flights from Austin to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 75% of 1-stop itineraries from Austin to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from Austin to Ontario?
Average round-trip fare for 1-stop flights from Austin to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Dallas (DFW) is the most affordable 1-stop option, with an average round-trip price of $440.
What’s the fastest layover option from Austin to Ontario?
Shortest average travel time for 1-stop one-way flights from Austin to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 4h 42m.
Which airport typically offers the quickest layover for flights from Austin to Ontario?
Average layover duration for 1-stop one-way flights from Austin to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 0h 48m.
The best insider tips for Austin to Ontario flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Austin to Ontario trip
Our travel experts
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 7月 8, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andAmerican Airlines from Austin to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Boarding
8.1
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Austin to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Austin to Ontario by cabin class
Find flights from Austin to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 7月 8, 2026.
Austin and Ontario flights
Browse other Austin and Ontario flight options. Last updated on 7月 8, 2026.
Other flights from Austin
Browse through other flights departing from Austin. Flights are based on user searches made on Cheapflights and were last updated on 7月 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Austin to Ontario
Discover the top 6 airlines that operate flights from Austin to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated 7月 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$144 | Average$248 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$280 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$216 | Average$326 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$356 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$440 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$238 | Average$390 | FlexibilityNo cancel fee | On-time63% |