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$50+ Cheap flights from Ontario to Austin (ONT - AUS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Find cheap flights from Ontario to Austin with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from Ontario to Austin Bergstrom are usually found in April or September, booked 87 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Ontario to Austin

Cheapest flights from Ontario to Austin
Explore the most affordable flight options available from Ontario to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
Wed 12/106:15 amONT - AUS
1 stop28h 29mFrontier
Sun 1/118:13 pmAUS - ONT
1 stop13h 23mFrontier
Deal found 12/2$119
This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
Wed 12/106:15 amONT - AUS
1 stop28h 29mFrontier
Sun 1/181:03 pmAUS - ONT
1 stop6h 41mFrontier
Deal found 12/2$129
This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
Thu 12/112:59 pmONT - AUS
1 stop23h 19mFrontier
Sun 1/181:03 pmAUS - ONT
1 stop6h 41mFrontier
Deal found 12/2$156
This Frontier deal was found by Cheapflights users on 12/2. 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.
Sat 12/206:00 amONT - AUS
1 stop8h 18mFrontier
Sat 1/37:22 pmAUS - ONT
1 stop5h 59mFrontier
Deal found 12/2$164
This CheapOair deal was found by Cheapflights users on 12/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:45 amONT - AUS
1 stop15h 29mFrontier
Thu 1/16:45 amAUS - ONT
1 stop19h 14mFrontier
Deal found 12/2$165
This Frontier deal was found by Cheapflights users on 12/1. 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.
Mon 12/153:20 pmONT - AUS
1 stop6h 54mFrontier
Thu 1/15:13 pmAUS - ONT
1 stop6h 04mFrontier
Deal found 12/1$173
This CheapOair deal was found by Cheapflights users on 12/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 pmONT - AUS
1 stop20h 18mFrontier
Mon 1/57:22 pmAUS - ONT
1 stop21h 47mFrontier
Deal found 12/3$174
This Mytrip deal was found by Cheapflights users on 12/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:45 amONT - AUS
1 stop15h 29mFrontier
Thu 1/88:13 pmAUS - ONT
1 stop13h 23mFrontier
Deal found 12/3$182
This CheapOair deal was found by Cheapflights users on 12/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/226:00 pmONT - AUS
1 stop20h 18mFrontier
Thu 1/88:13 pmAUS - ONT
1 stop20h 41mFrontier
Deal found 12/3$183

Find flight deals from Ontario to Austin

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Austin (AUS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$128
(Frontier)

One-way from

$50
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$424

Good round-trip deal

$484 or less

Good one-way deal

$208 or less
Provider with most accurate pricing for Ontario-Austin Bergstrom flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Austin Bergstrom flights.
Search Deals
From Ontario to Austin Bergstrom
Search Deals
One-way flight from Ontario to Austin Bergstrom
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ontario to Austin Bergstrom.
Search Deals
Price to beat on a one-way flight from Ontario to Austin Bergstrom.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Austin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
Use the filters below to find and compare flights from Ontario to Austin that are best for you.

Fly from

Ontario

Fly to

Austin

Route

Depart

Return

Price

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 2/3

7:15 am-10:40 pm

1 stop13h 25m

Austin Bergstrom

Thu 2/5

2:41 pm-7:53 pm

1 stop7h 12m

$129

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Mon 12/29

6:45 am-12:14 am

1 stop15h 29m

Austin Bergstrom

Sat 1/3

7:22 pm-11:21 pm

1 stop5h 59m

$224

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 12/24

6:45 am-12:14 am

1 stop15h 29m

Austin Bergstrom

Wed 12/31

6:45 am-11:59 pm

1 stop19h 14m

$253

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 1/14

6:00 am-1:45 pm

1 stop5h 45m

Austin Bergstrom

Wed 1/14

6:50 pm-10:38 pm

1 stop5h 48m

$259

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 1/8

6:00 am-3:54 pm

1 stop7h 54m

Austin Bergstrom

Tue 1/13

7:15 am-3:08 pm

1 stop9h 53m

$283

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 3/24

6:00 am-5:14 am

1 stop21h 14m

Austin Bergstrom

Tue 3/31

6:00 am-10:38 pm

1 stop18h 38m

$284

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 12/20

6:45 am-12:14 am

1 stop15h 29m

Austin Bergstrom

Sun 12/21

4:48 pm-5:15 pm

1 stop26h 27m

$284

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 3/11

6:00 am-12:14 am

1 stop16h 14m

Austin Bergstrom

Thu 3/19

7:22 pm-9:17 pm

1 stop27h 55m

$293

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 12/24

6:45 am-12:14 am

1 stop15h 29m

Austin Bergstrom

Sat 12/27

7:22 pm-11:21 pm

1 stop5h 59m

$314

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Fri 12/19

6:45 am-1:59 pm

1 stop5h 14m

Austin Bergstrom

Sun 12/21

4:48 pm-9:27 pm

1 stop6h 39m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 21 results
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3

Compare providers for flights from Ontario to Austin

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Austin in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Austin flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Austin flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Austin flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Austin flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Austin flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Austin

Have a flexible travel schedule? Discover the best time to fly to Austin from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Austin

How far ahead should I book a flight from Ontario to Austin?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Austin. Price data was last updated on November 28, 2025.

Booking 87 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Austin. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Austin?

Currently, September is the cheapest month in which you can book a flight from Ontario to Austin (average of $58). Flying from Ontario to Austin in March is currently the most expensive (average of $97). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to AUS?

Find hourly flight availability from Ontario to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

It’s optimal to fly from Ontario to Austin in the evening. By choosing this option you can save up to 52% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Austin

Get insights into the airlines that provide service to Austin. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Austin. Reviews last updated December 4, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and American Airlines from Ontario to Austin by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,252 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,252 reviews
Southwest
8.0
Very good
4,252 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,011 reviews
Southwest
8.0
Very good
4,252 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,043 reviews
Southwest
8.0
Very good
4,252 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.8
Fair
3,092 reviews
Southwest
8.0
Very good
4,252 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.1

Food

7.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Austin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Ontario to Austin flight route?

    This flight path from Ontario to Austin Bergstrom was viewed by 12 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Ontario to Austin?

    For as low as $259, Frontier can have you in Austin from Ontario in 5h 45m. The distance between Ontario and Austin is about 1193 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Ontario to Austin round-trip?

    Flying on Delta is currently your cheapest option to Austin, with prices starting at $98. Additional round-trip tickets that might be worth considering are offered by Frontier and American Airlines, with the lowest prices starting at $120 and $226, respectively. Delta is priced at 69% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Austin one-way?

    One-way options have recently been found by users for as low as $65 on Frontier. Other airlines that offer cheap prices include American Airlines from $118 and Southwest from $128 one-way.

  • What are the cheapest flights from Ontario to Austin?

    Looking at all options, your cheapest flight can be booked for $177. While the most popular route (Ontario - Austin Bergstrom) can be booked for $128 on average, our data indicates $380 when flying from Ontario to Austin.

  • Can I find deals for flights from Ontario to Austin that include hotel bookings?

    Yes. In addition to deals on Ontario to Austin flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Austin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Austin.

  • Can I find deals for business class flights from Ontario to Austin?

    Yes. Cheapflights offers flight deals from Ontario to Austin by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Austin?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Austin (average of $58). Flying from Ontario to Austin in March is currently the most expensive (average of $97). 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.

See more FAQs

Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Cedar Park
Round Rock
San Marcos
Georgetown
Fredericksburg
Pflugerville
Dripping Springs
Canyon Lake
Seguin
Horseshoe Bay

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Top 4 airlines flying from Ontario to Austin

Discover the top 4 airlines that operate flights from Ontario to Austin. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$120Average$312FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$123Average$225FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$226Average$394FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$234Average$363FlexibilityNo cancel feeOn-time63%

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