$104 Cheap Flights from Austin (AUS) to Ontario (ONT)

View $104 flight on Sat, Sep 13, 2025Opens in a new window

Popular airlines from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from Austin to Ontario (AUS-ONT)

Prices were available within the past 7 days and start at $104 for one-way flights and $208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Aug 5 - Wed, Aug 6
AUS
Austin
ONT
Ontario
$208 Roundtrip, just found
$208
Roundtrip
just found
Select Frontier Airlines flight, departing Tue, Aug 5 from Austin to Ontario, returning Wed, Aug 6, priced at $208 just found
Southwest Airlines
Mon, Nov 17 - Thu, Nov 20
AUS
Austin
ONT
Ontario
$217 Roundtrip, found 1 hour ago
$217
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Mon, Nov 17 from Austin to Ontario, returning Thu, Nov 20, priced at $217 found 1 hour ago
United
Sun, Aug 31 - Sat, Sep 6
AUS
Austin
ONT
Ontario
$218 Roundtrip, found 11 hours ago
$218
Roundtrip
found 11 hours ago
Select United flight, departing Sun, Aug 31 from Austin to Ontario, returning Sat, Sep 6, priced at $218 found 11 hours ago
Alaska Airlines
Sun, Aug 31 - Sat, Sep 6
AUS
Austin
ONT
Ontario
$222 Roundtrip, found 11 hours ago
$222
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Sun, Aug 31 from Austin to Ontario, returning Sat, Sep 6, priced at $222 found 11 hours ago
Frontier Airlines
Sat, Sep 27 - Wed, Oct 1
AUS
Austin
ONT
Ontario
$224 Roundtrip, found 1 day ago
$224
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Sep 27 from Austin to Ontario, returning Wed, Oct 1, priced at $224 found 1 day ago
Alaska Airlines
Mon, Aug 25 - Wed, Aug 27
AUS
Austin
ONT
Ontario
$227 Roundtrip, just found
$227
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Aug 25 from Austin to Ontario, returning Wed, Aug 27, priced at $227 just found
American Airlines
Mon, Aug 25 - Wed, Aug 27
AUS
Austin
ONT
Ontario
$227 Roundtrip, just found
$227
Roundtrip
just found
Select American Airlines flight, departing Mon, Aug 25 from Austin to Ontario, returning Wed, Aug 27, priced at $227 just found
United
Sun, Aug 31 - Sat, Sep 6
AUS
Austin
ONT
Ontario
$228 Roundtrip, found 11 hours ago
$228
Roundtrip
found 11 hours ago
Select United flight, departing Sun, Aug 31 from Austin to Ontario, returning Sat, Sep 6, priced at $228 found 11 hours ago
Frontier Airlines
Thu, Aug 21 - Sun, Aug 24
AUS
Austin
ONT
Ontario
$228 Roundtrip, just found
$228
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Aug 21 from Austin to Ontario, returning Sun, Aug 24, priced at $228 just found
Southwest Airlines
Tue, Sep 16 - Sat, Sep 20
AUS
Austin
ONT
Ontario
$229 Roundtrip, found 1 day ago
$229
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Sep 16 from Austin to Ontario, returning Sat, Sep 20, priced at $229 found 1 day ago

Find the cheapest month to fly from Austin (AUS) to Ontario (ONT)

April is typically the cheapest month to fly

From $115 - $286 per traveler.

Graph displaying average flight prices per month

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $406
SNA
John Wayne
Average driving time to city center42 min
Flights from $406
Flights from Austin (AUS) to Ontario (ONT)
Origin airport
Austin-Bergstrom Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$208
Distance
1193 mi
Average flight time
2 hours 55 mins

Austin to Ontario Flights

The cheapest times to fly from Austin to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Austin to Ontario are during the month of August. You can find some of the cheapest flights from Austin to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Austin to Ontario

Sunday is one of the best days to book for cheap flights from Austin to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Austin to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Austin to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $104 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Austin to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Austin to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT) cost?
You can land cheap return tickets from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT) starting from $227. Book a seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines and United flight leaving AUS on August 5 2025 and touching down at ONT. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from AUS to ONT?
The cheapest flights from AUS to ONT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
When heading out of Austin-Bergstrom Intl. Airport (AUS), you can jump on a nonstop flight to Los Angeles - Ontario Intl. Airport (ONT) with Southwest Airlines.
What is the cheapest airline that flies from AUS to ONT?
With tickets starting at $119 for a one-way journey from AUS to ONT, Southwest Airlines is currently the cheapest airline for this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from AUS on October 8 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
On average, just 1 direct flight departs each day from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT). Need more options? Use our filters to find flights with layovers and add a new destination to your journey.
What are the most popular departure times for flights from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
The 1 PM departures from AUS to ONT are the busiest. Prices can be higher for these popular slots. If you want to save on your trip, book during off-peak hours.
What day of the week has the most flights from AUS to ONT?
Jet off on a Friday if you're searching for the best selection of flights from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT).
What is the earliest flight from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
The first flight of the day jetting off from Austin-Bergstrom Intl. Airport (AUS) is at around 1:35PM UTC-6. Catch this flight and you'll land at Los Angeles - Ontario Intl. Airport (ONT) at approximately 2:55PM UTC-8. The total travel time is 3h 20m.
How long does it take to fly from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
Flights from AUS to ONT have an average travel time of 3 hours and 20 minutes. The total distance between the two is 1,200 mi.
What is the best time to fly from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) on schedule, select a flight that takes off from Austin-Bergstrom Intl. Airport (AUS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from Austin-Bergstrom Intl. Airport (AUS)?
Land at any of these Ontario hubs after your direct flight from Austin-Bergstrom Intl. Airport (AUS):

  • Los Angeles Intl. Airport (LAX)
  • John Wayne Airport (SNA)
  • Bob Hope Airport (BUR)
  • Los Angeles - Ontario Intl. Airport (ONT)
  • Long Beach Municipal Airport (LGB)

Is it cheaper to buy a plane ticket from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Waiting until just before your trip to book a flight from AUS to ONT generally means paying more. While it's possible to find some last-minute offers, there's no guarantee. Be flexible with your itinerary for a better chance of getting a bargain.
Is it cheaper to book an AUS to ONT flight and hotel package?
Compared with arranging flights and hotels separately, booking an AUS to ONT flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place will take the hassle out of planning your trip. Simply secure your flights and choose from our extensive range of hotels, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Austin-Bergstrom Intl. Airport (AUS) to Los Angeles - Ontario Intl. Airport (ONT)?
Generally, it's possible to reschedule or cancel your AUS to ONT flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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