$82+ Cheap flights from Austin to Ontario (AUS - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ONT
Oct 3 — Oct 101
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 October, booked 56 days in advance, depart on a Monday or Thursday and return on a Tuesday
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 September 3, 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 September 3, 2026.
This deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:24 pm -
1 stop5h 23m
Thu 10/811:52 am -
1 stop5h 34m
Deal found 9/1![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:21 pm -
1 stop29h 29m
Tue 10/276:25 am -
1 stop11h 01m
Deal found 9/2![Frontier logo]()
$176
This Expedia deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:24 pm -
1 stop16h 06m
Wed 10/76:15 am -
1 stop11h 14m
Deal found 9/3![Frontier logo]()
$186
This Expedia deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:21 pm -
1 stop16h 08m
Wed 10/216:15 am -
1 stop11h 11m
Deal found 9/2![Frontier logo]()
$187
This Booking.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:24 pm -
1 stop16h 06m
Wed 10/711:45 am -
1 stop5h 44m
Deal found 9/2![Frontier logo]()
$192
This Booking.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:21 pm -
1 stop5h 29m
Wed 10/2811:52 am -
1 stop5h 34m
Deal found 9/3![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:24 pm -
1 stop29h 23m
Sat 10/106:15 am -
1 stop11h 11m
Deal found 9/2![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:21 pm -
1 stop5h 30m
Wed 11/116:25 am -
1 stop11h 01m
Deal found 9/2![Frontier logo]()
$207
This Mytrip deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:21 pm -
1 stop5h 29m
Tue 10/2011:52 am -
1 stop5h 34m
Deal found 9/2![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:24 pm -
1 stop16h 06m
Thu 9/246:15 am -
1 stop11h 14m
Deal found 9/2![Frontier logo]()
$214
This Booking.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:21 pm -
1 stop16h 08m
Fri 10/2311:52 am -
1 stop5h 34m
Deal found 9/2![Frontier logo]()
$215
This Expedia deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:04 pm -
1 stop14h 18m
Tue 9/296:15 am -
1 stop11h 14m
Deal found 9/2![Frontier logo]()
$217
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 September 3, 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 September 3, 2026.
This Mytrip deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:21 pm -
1 stop5h 29m
Tue 10/2011:52 am -
1 stop5h 34m
Deal found 9/2![Frontier logo]()
$213
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:45 am -
Nonstop3h 05m
Wed 10/214:15 pm -
1 stop6h 05m
Deal found 9/2![Southwest logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/111:36 pm -
1 stop11h 03m
Fri 1/87:10 am -
1 stop7h 32m
Deal found 9/2![Alaska Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/55:45 pm -
1 stop5h 55m
Mon 1/116:53 pm -
2 stops11h 38m
Deal found 9/2![United Airlines logo]()
$402
This Southwest deal was found by Cheapflights users on 8/30. 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 10/296:10 am -
1 stop5h 15m
Sat 10/315:40 am -
2 stops8h 15m
Deal found 8/30![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:30 pm -
Nonstop3h 05m
Mon 10/125:15 pm -
1 stop5h 15m
Deal found 8/31![Southwest logo]()
$363
This Alaska Airlines deal was found by Cheapflights users on 8/29. 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 10/305:52 pm -
1 stop8h 02m
Mon 11/26:44 pm -
2 stops22h 35m
Deal found 8/29![Alaska Airlines logo]()
$401
This Southwest deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:50 am -
Nonstop3h 00m
Sun 10/411:55 pm -
1 stop7h 25m
Deal found 8/29![Southwest logo]()
$363
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:00 am -
Nonstop3h 00m
Tue 9/298:30 am -
Nonstop2h 50m
Deal found 9/2![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/55:15 am -
2 stops7h 25m
Sun 11/811:15 am -
2 stops7h 45m
Deal found 9/2![Southwest logo]()
$382
Last-minute flights from Austin to OntarioDiscover last-minute flight deals from Austin to Ontario. Data last updated September 3, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Ontario. Data last updated September 3, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:24 pm -
1 stop16h 06m
Thu 9/246:15 am -
1 stop11h 14m
Deal found 9/2![Frontier logo]()
$214
This Expedia deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:04 pm -
1 stop14h 18m
Tue 9/296:15 am -
1 stop11h 14m
Deal found 9/2![Frontier logo]()
$217
This Expedia deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/308:24 pm -
1 stop16h 06m
Wed 10/76:15 am -
1 stop11h 14m
Deal found 9/3![Frontier logo]()
$186
This Booking.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:24 pm -
1 stop16h 06m
Wed 10/711:45 am -
1 stop5h 44m
Deal found 9/2![Frontier logo]()
$192
This deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:24 pm -
1 stop5h 23m
Thu 10/811:52 am -
1 stop5h 34m
Deal found 9/1![Frontier logo]()
$164
This Frontier deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:24 pm -
1 stop5h 23m
Tue 10/66:15 am -
1 stop11h 14m
Deal found 9/1![Frontier logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:24 pm -
1 stop29h 23m
Sat 10/106:15 am -
1 stop11h 11m
Deal found 9/2![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:21 pm -
1 stop5h 29m
Tue 10/2711:52 am -
1 stop5h 34m
Deal found 9/2![Frontier logo]()
$219
This Expedia deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:21 pm -
1 stop16h 08m
Wed 10/216:15 am -
1 stop11h 11m
Deal found 9/2![Frontier logo]()
$187
This Booking.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:21 pm -
1 stop16h 08m
Fri 10/2311:52 am -
1 stop5h 34m
Deal found 9/2![Frontier logo]()
$215
This Mytrip deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:21 pm -
1 stop5h 29m
Tue 10/2011:52 am -
1 stop5h 34m
Deal found 9/2![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:21 pm -
1 stop29h 29m
Tue 10/276:25 am -
1 stop11h 01m
Deal found 9/2![Frontier logo]()
$176
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 September 3, 2026.
Search for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated September 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/29. 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 10/288:21 pm -
1 stop16h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/29![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/68:24 pm -
1 stop5h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:24 pm -
1 stop16h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:21 pm -
1 stop16h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$93
This Super.com deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:21 pm -
1 stop16h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Frontier logo]()
$94
This Expedia deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:24 pm -
1 stop16h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:24 pm -
1 stop5h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Frontier logo]()
$96
This Booking.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:21 pm -
1 stop5h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$97
This Trip.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:21 pm -
1 stop5h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$101
This Trip.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:15 pm -
1 stop6h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$102
This Frontier deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/288:24 pm -
1 stop5h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Frontier logo]()
$104
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 September 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $164 |
One-way from | $82 (Kiwi.com) |
Popular in | December |
Cheapest in | May |
Average price | $392 |
Good round-trip deal | $267 or less |
Good one-way deal | $143 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 7,457,451 searches. Data last updated September 3, 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
Quickest round-trip
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 10/22
11:45 am-12:50 pm
Nonstop3h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$149
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Mon 3/1
7:25 pm-11:48 pm
1 stop6h 23m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$154
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 12/2
2:50 pm-9:20 pm
2 stops8h 30m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Tue 3/2
9:50 am-1:25 pm
2 stops5h 35m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$159
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 11/26
2:29 pm-6:30 pm
1 stop6h 01m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$175
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sun 2/28
6:25 am-9:55 am
1 stop5h 30m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$179
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 9/30
4:17 pm-10:59 pm
2 stops8h 42m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$180
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 11/25
6:35 pm-11:40 pm
2 stops7h 05m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$184
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Tue 10/27
8:15 am-12:36 pm
1 stop6h 21m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$195
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Tue 11/3
5:15 am-3:33 pm
2 stops12h 18m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$204
Showing 1-10 of 21 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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | 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
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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 $467). 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 September 3, 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 morning, which can drop the price by up to 23% 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 September 3, 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.
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Food
7.0
Entertainment
7.5
Overall
8.0
Comfort
8.0
Boarding
8.1
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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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 September 3, 2026.
Austin and Ontario flights
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Top 5 airlines flying from Austin to Ontario
Discover the top 5 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 7,457,451 searches. Data last updated September 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$144 | Average$280 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$286 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$216 | Average$356 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$440 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$392 | FlexibilityNo cancel fee | On-time63% |