$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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ONT
Nov 8 — Nov 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 Tuesday 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 October 9, 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 October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/7. 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 11/75:55 am -
1 stop4h 55m
Sat 11/711:20 am -
1 stop7h 25m
Deal found 10/7![Southwest logo]()
$184
This Frontier deal was found by Cheapflights users on 10/7. 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.
Tue 11/108:21 pm -
1 stop5h 30m
Wed 11/116:30 am -
1 stop10h 56m
Deal found 10/7![Frontier logo]()
$186
This Frontier deal was found by Cheapflights users on 10/6. 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.
Thu 10/291:08 pm -
1 stop5h 13m
Wed 11/410:35 am -
1 stop23h 38m
Deal found 10/6![Frontier logo]()
$187
This Booking.com deal was found by Cheapflights users on 10/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:21 pm -
1 stop5h 30m
Thu 11/58:35 pm -
1 stop13h 18m
Deal found 10/8![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:21 pm -
1 stop16h 21m
Thu 11/122:23 pm -
1 stop19h 30m
Deal found 10/6![Frontier logo]()
$196
This Flightnetwork deal was found by Cheapflights users on 10/8. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:21 pm -
1 stop16h 14m
Sat 11/146:30 am -
1 stop10h 56m
Deal found 10/8![Frontier logo]()
$197
This Booking.com deal was found by Cheapflights users on 10/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:21 pm -
1 stop16h 14m
Thu 11/198:35 pm -
1 stop23h 29m
Deal found 10/8![Frontier logo]()
$198
This Southwest deal was found by Cheapflights users on 10/7. 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.
Thu 11/196:15 am -
1 stop5h 30m
Mon 11/235:20 pm -
1 stop5h 15m
Deal found 10/7![Southwest logo]()
$200
This Frontier deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:21 pm -
1 stop5h 30m
Fri 11/136:30 am -
1 stop10h 56m
Deal found 10/5![Frontier logo]()
$213
This Southwest deal was found by Cheapflights users on 10/8. 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 11/56:40 pm -
1 stop6h 05m
Mon 11/93:55 pm -
1 stop6h 25m
Deal found 10/8![Southwest logo]()
$214
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 October 9, 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 October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:20 am -
1 stop7h 55m
Sat 12/126:10 am -
Nonstop2h 45m
Deal found 10/5![Southwest logo]()
$243
This United Airlines deal was found by Cheapflights users on 10/6. 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 10/296:27 am -
1 stop8h 02m
Sat 10/311:29 pm -
2 stops7h 46m
Deal found 10/6![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 10/9. 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.
Sun 12/206:05 am -
1 stop5h 05m
Mon 1/43:55 pm -
1 stop6h 20m
Deal found 10/9![Southwest logo]()
$283
This Southwest deal was found by Cheapflights users on 10/7. 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 11/75:55 am -
2 stops7h 25m
Sun 11/85:45 am -
1 stop7h 35m
Deal found 10/7![Southwest logo]()
$286
This Southwest deal was found by Cheapflights users on 10/8. 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 11/67:35 pm -
2 stops6h 05m
Fri 11/1312:10 pm -
2 stops7h 10m
Deal found 10/8![Southwest logo]()
$330
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/910:25 am -
Nonstop3h 05m
Thu 11/124:00 pm -
1 stop6h 40m
Deal found 10/5![Southwest logo]()
$335
This Southwest deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1210:25 am -
Nonstop3h 05m
Sun 11/159:00 am -
Nonstop2h 45m
Deal found 10/6![Southwest logo]()
$338
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:55 am -
2 stops7h 05m
Mon 11/212:10 pm -
2 stops7h 10m
Deal found 10/5![Southwest logo]()
$339
This Southwest deal was found by Cheapflights users on 10/4. 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.
Fri 11/1310:25 am -
Nonstop3h 05m
Sun 11/152:45 pm -
1 stop7h 10m
Deal found 10/4![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 10/8. 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 10/2311:45 am -
Nonstop3h 05m
Mon 10/265:15 pm -
1 stop6h 20m
Deal found 10/8![Southwest logo]()
$382
Last-minute flights from Austin to OntarioDiscover last-minute flight deals from Austin to Ontario. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Ontario. Data last updated October 9, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 10/6. 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.
Thu 10/291:08 pm -
1 stop5h 13m
Wed 11/410:35 am -
1 stop23h 38m
Deal found 10/6![Frontier logo]()
$187
This Booking.com deal was found by Cheapflights users on 10/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:21 pm -
1 stop5h 30m
Thu 11/58:35 pm -
1 stop13h 18m
Deal found 10/8![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:21 pm -
1 stop16h 21m
Thu 11/122:23 pm -
1 stop19h 30m
Deal found 10/6![Frontier logo]()
$196
This Southwest deal was found by Cheapflights users on 10/8. 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 11/56:40 pm -
1 stop6h 05m
Mon 11/93:55 pm -
1 stop6h 25m
Deal found 10/8![Southwest logo]()
$214
This Southwest deal was found by Cheapflights users on 10/7. 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 11/75:55 am -
1 stop4h 55m
Sat 11/711:20 am -
1 stop7h 25m
Deal found 10/7![Southwest logo]()
$184
This Flightnetwork deal was found by Cheapflights users on 10/8. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:21 pm -
1 stop16h 14m
Sat 11/146:30 am -
1 stop10h 56m
Deal found 10/8![Frontier logo]()
$197
This Frontier deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:21 pm -
1 stop5h 30m
Fri 11/136:30 am -
1 stop10h 56m
Deal found 10/5![Frontier logo]()
$213
This Frontier deal was found by Cheapflights users on 10/8. 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.
Tue 11/108:21 pm -
1 stop5h 30m
Sat 11/146:30 am -
1 stop10h 56m
Deal found 10/8![Frontier logo]()
$186
This Booking.com deal was found by Cheapflights users on 10/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:21 pm -
1 stop16h 14m
Thu 11/198:35 pm -
1 stop23h 29m
Deal found 10/8![Frontier logo]()
$198
This Southwest deal was found by Cheapflights users on 10/7. 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.
Thu 11/196:15 am -
1 stop5h 30m
Mon 11/235:20 pm -
1 stop5h 15m
Deal found 10/7![Southwest logo]()
$200
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 October 9, 2026.
Search for one-way flight options from Austin to Ontario. Find affordable one-way fares based on user searches. Data last updated October 9, 2026.
This Southwest deal was found by Cheapflights users on 10/7. 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 11/73:15 pm -
Nonstop3h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Southwest logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 10/9. 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 12/710:51 pm -
2 stops26h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![Frontier logo]()
$84
This Super.com deal was found by Cheapflights users on 10/8. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:21 pm -
1 stop5h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Frontier logo]()
$92
This Booking.com deal was found by Cheapflights users on 10/6. 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 11/38:21 pm -
1 stop5h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 10/8. 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.
Wed 11/259:32 pm -
1 stop11h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Frontier logo]()
$99
This Jetabroad deal was found by Cheapflights users on 10/8. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/98:28 pm -
1 stop12h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Frontier logo]()
$101
This Delta deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/68:10 am -
1 stop6h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Delta logo]()
$109
This Kiwi.com deal was found by Cheapflights users on 10/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/68:28 pm -
1 stop12h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 10/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/58:28 pm -
1 stop12h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Frontier logo]()
$112
This Southwest deal was found by Cheapflights users on 10/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/711:25 am -
2 stops5h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/8![Southwest logo]()
$114
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 October 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $184 (Southwest) |
One-way from | $82 (Southwest) |
Popular in | December |
Cheapest in | May |
Average price | $298 |
Good round-trip deal | $388 or less |
Good one-way deal | $153 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 October 9, 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 Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sat 11/7
10:20 am-3:20 pm
1 stop7h 00m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$92
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 1/7
9:50 am-1:25 pm
2 stops5h 35m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$97
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 1/7
12:30 pm-4:12 pm
1 stop5h 42m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$109
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 4/7
7:15 am-2:47 pm
1 stop9h 32m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$109
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 4/7
7:20 am-11:35 am
1 stop6h 15m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$109
Quickest round-trip
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sat 12/5
3:15 pm-4:25 pm
Nonstop3h 10m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$120
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Thu 11/19
6:09 pm-11:49 pm
1 stop7h 40m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$123
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Wed 11/4
1:27 pm-6:01 pm
1 stop6h 34m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$178
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Sat 11/21
6:15 pm-11:45 pm
2 stops7h 30m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$180
AustinOntario
AUS Austin Bergstrom - ONT Ontario
AUSONT
Austin Bergstrom
Mon 1/4
8:40 am-1:00 pm
2 stops6h 20m
Ontario
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$180
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 October.
| 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
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 $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 October 9, 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 October 9, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andJetBlue 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
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Overall
7.9
Comfort
8.0
Entertainment
7.4
Crew
8.6
Food
7.0
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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Austin
Popular flights
Alternative routes for Austin to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
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 October 9, 2026.
Austin and Ontario flights
Browse other Austin and Ontario flight options. Last updated on October 9, 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 October 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 October 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$147 | Average$279 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$286 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$216 | Average$352 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$440 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$390 | FlexibilityNo cancel fee | On-time63% |