HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Austin

$99+ 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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Austin with Cheapflights

1. Tell us where you want to go

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

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ontario to Austin Bergstrom are usually found in November or April, booked 77 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap 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 April 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$218
(Frontier)

One-way from

$99
(Frontier)

Popular in

December

Cheapest in

November

Average price

$282

Good round-trip deal

$324 or less

Good one-way deal

$189 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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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

Find 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 April 29, 2025.

This Frontier deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/912:16 pmONT - AUS
1 stop9h 04mFrontier
Mon 5/126:00 amAUS - ONT
1 stop7h 15mFrontier
Deal found 4/28$218
This Southwest deal was found by Cheapflights users on 4/28. 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 5/2712:00 pmONT - AUS
Nonstop2h 45mSouthwest
Tue 6/35:30 pmAUS - ONT
1 stop7h 00mSouthwest
Deal found 4/28$241
This Trip.com deal was found by Cheapflights users on 4/28. 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.
Tue 4/2910:44 amONT - AUS
1 stop12h 08mMultiple Airlines
Tue 5/66:45 amAUS - ONT
1 stop19h 14mMultiple Airlines
Deal found 4/28$248
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
Sat 8/306:00 amONT - AUS
1 stop10h 36mAlaska Airlines
Tue 9/25:50 pmAUS - ONT
1 stop8h 03mAlaska Airlines
Deal found 4/27$250
This United Airlines deal was found by Cheapflights users on 4/28. 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 5/291:36 pmONT - AUS
1 stop8h 39mUnited Airlines
Sat 6/74:06 pmAUS - ONT
1 stop7h 04mUnited Airlines
Deal found 4/28$272
This Hawaiian Airlines deal was found by Cheapflights users on 4/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:58 pmONT - AUS
1 stop9h 09mHawaiian Airlines
Sat 8/166:00 pmAUS - ONT
1 stop7h 59mHawaiian Airlines
Deal found 4/28$273
This American Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/26:23 amONT - AUS
1 stop5h 32mAmerican Airlines
Sat 7/52:46 pmAUS - ONT
1 stop5h 22mAmerican Airlines
Deal found 4/28$277
This Delta deal was found by Cheapflights users on 4/28. 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.
Thu 6/126:00 amONT - AUS
1 stop5h 04mDelta
Sun 6/155:13 amAUS - ONT
1 stop5h 39mDelta
Deal found 4/28$307

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 April 29, 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

Fri 5/9

12:16 pm-11:20 pm

1 stop9h 04m

Austin Bergstrom

Mon 5/12

6:00 am-11:15 am

1 stop7h 15m

$218

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 5/27

12:00 pm-4:45 pm

Nonstop2h 45m

Austin Bergstrom

Tue 6/3

5:30 pm-10:30 pm

1 stop7h 00m

$241

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 8/30

6:00 am-6:36 pm

1 stop10h 36m

Austin Bergstrom

Tue 9/2

5:50 pm-11:53 pm

1 stop8h 03m

$250

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 5/29

1:36 pm-12:15 am

1 stop8h 39m

Austin Bergstrom

Sat 6/7

4:06 pm-9:10 pm

1 stop7h 04m

$272

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 8/7

6:58 pm-6:07 am

1 stop9h 09m

Austin Bergstrom

Sat 8/16

6:00 pm-11:59 pm

1 stop7h 59m

$273

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 7/2

6:23 am-1:55 pm

1 stop5h 32m

Austin Bergstrom

Sat 7/5

2:46 pm-6:08 pm

1 stop5h 22m

$277

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 6/12

6:00 am-1:04 pm

1 stop5h 04m

Austin Bergstrom

Sun 6/15

5:13 am-8:52 am

1 stop5h 39m

$307

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 5/31

6:00 am-3:44 pm

1 stop7h 44m

$99

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Fri 5/30

1:33 pm-8:51 pm

1 stop5h 18m

$104

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 5/29

7:20 pm-6:05 am

1 stop8h 45m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 14 results
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust 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 CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Ontario-Austin flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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 April 25, 2025.

Booking 77 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Austin. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Austin (average of $286). Flying from Ontario to Austin in March is currently the most expensive (average of $362). 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 April 29, 2025.

It’s optimal to fly from Ontario to Austin in the evening. By choosing this option you can save up to 55% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Ontario to Austin?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Austin. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Ontario to Austin flight should consider departing on Tuesday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Ontario to Austin

Explore weekly flight availability from Ontario to Austin. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 29, 2025.

The most flights from ONT to AUS are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Austin by month

Plan your trip to Austin by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Austin ranges from 2.1 - 4.2 inches per month. May is typically the wettest month, when rainfall can reach 4.2 in. July is typically the driest time to visit Austin when rainfall is around 2.1 in.

Temperature in Austin by month

Plan your trip to Austin by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Austin, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

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 April 29, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Ontario to Austin to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,292 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,402 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What airports do I use to fly from Ontario to Austin?

    If you wish to fly to Austin from Ontario, then you need to book flights from Ontario to Austin Bergstrom. There are 3 flights from Ontario (ONT) to Austin Bergstrom (AUS) per day to choose from. Flights to Austin from Ontario are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 2h 45m is how long a nonstop flight from Ontario to Austin Bergstrom typically takes.

  • How popular is this Ontario to Austin flight route?

    This flight path from Ontario to Austin Bergstrom was viewed by 6 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Flying on Frontier is currently your cheapest option to Austin, with prices starting at $218. Additional round-trip tickets that might be worth considering are offered by Southwest and Alaska Airlines, with the lowest prices starting at $241 and $250, respectively. Frontier is priced at 34% 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 $99 on Frontier. Other airlines that offer cheap prices include United Airlines from $104 and Alaska Airlines from $108 one-way.

  • What are the cheapest flights from Ontario to Austin?

    Looking at all options, your cheapest flight can be booked for $118. While the most popular route (Ontario - Austin Bergstrom) can be booked for $203 on average our data indicates $276 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, January is the cheapest month in which you can book a flight from Ontario to Austin (average of $286). Flying from Ontario to Austin in March is currently the most expensive (average of $362). 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 Ontario?

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

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 for Ontario to Austin

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Dallas/Fort Worth flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Hobby flights
Burbank to Dallas/Fort Worth flights
Santa Ana to Dallas/Fort Worth flights
Ontario to Dallas/Fort Worth flights
San Francisco to Hobby flights
Los Angeles to George Bush Intcntl flights
Los Angeles to Austin flights
San Jose to Dallas/Fort Worth flights
Ontario to Hobby flights
San Francisco to George Bush Intcntl flights
San Francisco to Austin flights
Ontario to George Bush Intcntl flights
Los Angeles to Love Field flights
Santa Ana to Hobby flights
Oakland to Dallas/Fort Worth flights
Santa Ana to George Bush Intcntl flights
Los Angeles to San Antonio flights
San Diego to Hobby flights
Sacramento to Hobby flights
Oakland to Hobby flights
San Diego to Dallas/Fort Worth flights
San Diego to Austin flights
San Jose to Hobby flights
Burbank to Hobby flights
San Diego to George Bush Intcntl flights
Las Vegas to Dallas/Fort Worth flights
Burbank to George Bush Intcntl flights
Sacramento to George Bush Intcntl flights
Sacramento to Dallas/Fort Worth flights
Ontario to Love Field flights
San Jose to George Bush Intcntl flights
Oakland to George Bush Intcntl flights
San Jose to Austin flights
Fresno to Dallas/Fort Worth flights
Santa Ana to Austin flights
San Francisco to Love Field flights
Oakland to Austin flights
San Francisco to San Antonio flights
San Jose to Love Field flights
Ontario to San Antonio flights
Burbank to San Antonio flights
Los Angeles to El Paso flights
Santa Ana to Love Field flights
San Diego to Love Field flights
Burbank to Austin flights
Santa Ana to San Antonio flights
Long Beach to Dallas/Fort Worth flights

Top 5 airlines flying from Ontario to Austin

Discover the top 5 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$198FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$217Average$392FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$231Average$355FlexibilityNo cancel feeOn-time63%
DeltaCheapest$256Average$462FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$328Average$446FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.