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$79+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — AUS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 Thursday 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 September 11, 2025.

Round-trip from

$210
(Booking.com)

One-way from

$79
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$274

Good round-trip deal

$284 or less

Good one-way deal

$140 or less
From Ontario to Austin Bergstrom
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One-way flight from Ontario to Austin Bergstrom
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Highest demand for flights based on searches. 4% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ontario to Austin Bergstrom.
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Price to beat on a one-way flight from Ontario to Austin Bergstrom.
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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 September 11, 2025.

This Booking.com deal was found by Cheapflights users on 9/8. 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.
Thu 9/258:59 pmONT - AUS
1 stop21h 29mFrontier
Mon 9/299:23 pmAUS - ONT
1 stop24h 31mFrontier
Deal found 9/8$144
This Booking.com deal was found by Cheapflights users on 9/8. 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 9/168:59 pmONT - AUS
1 stop21h 59mFrontier
Sun 9/216:30 amAUS - ONT
1 stop27h 23mFrontier
Deal found 9/8$172
This Booking.com deal was found by Cheapflights users on 9/8. 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 9/294:08 pmONT - AUS
1 stop26h 50mFrontier
Thu 10/26:30 amAUS - ONT
1 stop15h 24mFrontier
Deal found 9/8$174
This Booking.com deal was found by Cheapflights users on 9/8. 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 9/308:59 pmONT - AUS
1 stop21h 59mFrontier
Fri 10/39:23 pmAUS - ONT
1 stop24h 31mFrontier
Deal found 9/8$178
This Booking.com deal was found by Cheapflights users on 9/8. 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.
Sat 10/48:59 pmONT - AUS
1 stop21h 29mFrontier
Mon 10/66:30 amAUS - ONT
1 stop17h 43mFrontier
Deal found 9/8$183
This Booking.com deal was found by Cheapflights users on 9/8. 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.
Fri 9/198:59 pmONT - AUS
1 stop23h 01mFrontier
Thu 9/256:30 amAUS - ONT
1 stop15h 24mFrontier
Deal found 9/8$193
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:53 amONT - AUS
1 stop15h 40mFrontier
Tue 10/146:00 amAUS - ONT
1 stop19h 50mFrontier
Deal found 9/9$195
This Booking.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/306:53 amONT - AUS
1 stop24h 49mFrontier
Mon 11/36:00 amAUS - ONT
1 stop7h 10mFrontier
Deal found 9/8$198
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:04 amONT - AUS
1 stop15h 29mFrontier
Sat 10/257:45 amAUS - ONT
1 stop18h 05mFrontier
Deal found 9/9$202
This Booking.com deal was found by Cheapflights users on 9/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:53 amONT - AUS
1 stop24h 49mFrontier
Sun 11/25:00 amAUS - ONT
1 stop19h 50mFrontier
Deal found 9/9$207
This Mytrip deal was found by Cheapflights users on 9/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:59 pmONT - AUS
1 stop21h 59mFrontier
Thu 9/256:30 amAUS - ONT
1 stop15h 24mFrontier
Deal found 9/8$210
This Priceline deal was found by Cheapflights users on 9/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:53 amONT - AUS
1 stop7h 00mFrontier
Sun 10/196:00 amAUS - ONT
1 stop5h 35mFrontier
Deal found 9/9$211

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 September 11, 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

Wed 10/1

8:00 am-1:26 pm

1 stop27h 26m

Austin Bergstrom

Tue 10/7

6:00 am-11:50 pm

1 stop19h 50m

$210

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 10/25

7:04 am-8:11 pm

2 stops11h 07m

Austin Bergstrom

Sun 11/2

5:00 am-10:10 am

1 stop7h 10m

$248

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 10/23

4:35 pm-12:23 am

1 stop5h 48m

Austin Bergstrom

Tue 10/28

8:10 am-12:16 pm

1 stop6h 06m

$254

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Fri 11/7

10:00 pm-9:38 am

1 stop9h 38m

Austin Bergstrom

Tue 11/11

7:23 pm-11:52 pm

1 stop6h 29m

$254

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 9/27

8:00 am-3:27 pm

1 stop5h 27m

Austin Bergstrom

Mon 9/29

1:00 pm-8:56 pm

1 stop9h 56m

$296

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 11/19

9:55 am-2:40 pm

Nonstop2h 45m

Austin Bergstrom

Sat 11/22

5:55 pm-10:55 pm

2 stops7h 00m

$310

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 10/29

10:10 am-3:00 pm

Nonstop2h 50m

Austin Bergstrom

Fri 10/31

8:35 am-9:40 am

Nonstop3h 05m

$313

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 10/18

6:00 am-1:08 pm

1 stop5h 08m

Austin Bergstrom

Sat 10/18

5:37 pm-9:24 pm

1 stop5h 47m

$323

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 10/1

6:00 am-1:08 pm

1 stop5h 08m

Austin Bergstrom

Wed 10/8

9:44 am-5:23 pm

2 stops9h 39m

$333

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 12/9

6:00 am-6:25 pm

1 stop10h 25m

$118

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 19 results
1
2

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 August 29, 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, August is the cheapest month in which you can book a flight from Ontario to Austin (average of $285). 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 September 11, 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 September 7, 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.

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 September 11, 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
4,248 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 is 1 flight from Ontario (ONT) to Austin Bergstrom (AUS) per day to choose from. Flights to Austin from Ontario are available from 4 different airlines, which means you should have some options if you want to compare airfare deals. 2h 40m 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 15 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 $254, Frontier can have you in Austin from Ontario in 5h 48m. 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 Frontier is currently your cheapest option to Austin, with prices starting at $120. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $120 and $226, respectively. Frontier is priced at 62% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Ontario to Austin?

    Looking at all options, your cheapest flight can be booked for $138. While the most popular route (Ontario - Austin Bergstrom) can be booked for $144 on average, our data indicates $245 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, August is the cheapest month in which you can book a flight from Ontario to Austin (average of $285). 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 Austin?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Austin

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$120Average$213FlexibilityNo cancel feeOn-time62%
DeltaCheapest$120Average$316FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$226Average$389FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$231Average$351FlexibilityNo cancel feeOn-time63%

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