ONT - AUS

$100 Find Cheap Flights from Ontario to Austin

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Austin departing on 7/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Austin

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Austin, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Austin, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Expert advice
Useful Info
Flights Deals

Cheap Flights from Ontario to Austin (ONT-AUS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Austin that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Austin

Sat, Jun 28 - Mon, Jun 30
Frontier Logo
7:00 am - 2:15 pmONT-AUS
5h 15m1 stop
Frontier Logo
1:53 pm - 8:51 pmAUS-ONT
8h 58m1 stop
$200Frontier
Find Deal
Wed, Jul 9 - Sun, Jul 13
Frontier Logo
12:59 am - 11:44 pmONT-AUS
20h 45m1 stop
Frontier Logo
6:00 am - 11:50 pmAUS-ONT
19h 50m1 stop
$210Frontier
Find Deal
Wed, Aug 6 - Mon, Aug 11
American Airlines Logo
12:22 pm - 11:35 pmONT-AUS
9h 13m1 stop
American Airlines Logo
12:05 pm - 5:52 pmAUS-ONT
7h 47m1 stop
$237American Airlines
Find Deal
Mon, Aug 4 - Thu, Aug 14
American Airlines Logo
12:55 pm - 11:59 pmONT-AUS
9h 04m1 stop
American Airlines Logo
2:48 pm - 9:39 pmAUS-ONT
8h 51m1 stop
$238American Airlines
Find Deal
Wed, Aug 13 - Thu, Aug 14
Delta Logo
10:00 pm - 9:40 amONT-AUS
9h 40m1 stop
Delta Logo
7:15 pm - 11:40 pmAUS-ONT
6h 25m1 stop
$247Delta
Find Deal
Sat, Nov 1 - Tue, Nov 4
Delta Logo
7:00 am - 5:13 pmONT-AUS
8h 13m1 stop
Delta Logo
12:30 pm - 4:14 pmAUS-ONT
5h 44m1 stop
$260Delta
Find Deal
Wed, Jul 16 - Wed, Jul 23
Southwest Logo
9:45 am - 2:30 pmONT-AUS
2h 45mnonstop
Southwest Logo
6:40 am - 9:05 amAUS-ONT
4h 25m1 stop
$274Southwest
Find Deal
Mon, Aug 11 - Sat, Aug 16
Southwest Logo
9:15 am - 6:10 pmONT-AUS
6h 55m2 stops
Southwest Logo
5:55 am - 10:20 amAUS-ONT
6h 25m2 stops
$280Southwest
Find Deal
Thu, Aug 7 - Mon, Aug 11
United Airlines Logo
6:00 am - 3:22 pmONT-AUS
7h 22m1 stop
United Airlines Logo
12:50 pm - 5:25 pmAUS-ONT
6h 35m1 stop
$328United Airlines
Find Deal
Wed, Aug 6 - Mon, Aug 11
United Airlines Logo
1:19 pm - 11:59 pmONT-AUS
8h 40m2 stops
United Airlines Logo
12:50 pm - 10:52 pmAUS-ONT
12h 02m2 stops
$337United Airlines
Find Deal
Expert advice

Expert advice for your flight from Ontario to Austin

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
ONT

ONT offers streamlined security with average wait times of 6-15 minutes, making it ideal for business travelers seeking efficiency.

Read more about ONTby Jennifer Simonson
AUS

CapMetro’s Bus Route 20 is the cheapest way to travel from AUS to downtown Austin, running every 15 minutes and taking about 35 minutes.

Read more about AUSby Harriet Baskas
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Read more
Harriet Baskas

Harriet Baskas

Expert on AUS

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Useful Info

KAYAK's insights & trends for Ontario to Austin flights

Get data-powered insights and trends into flights from Ontario to Austin to help you find the cheapest flights, the best time to fly and much more.

Find cheap flights to Austin
Find cheap flights to Austin

Planning a trip from Ontario to Austin? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

What’s the cheapest day of the week to fly from Ontario to Austin?

The average price of all round-trip flights from Ontario to Austin clicked on KAYAK for each day over the last 12 months.

When flying from Ontario to Austin, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Tuesdays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Austin, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Austin is April, where tickets cost $258 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $402 and $351 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Austin, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Austin, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$100
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Ontario to Austin

When to book flights from Ontario to Austin

Are your dates flexible? Find out the best times to travel from Ontario to Austin based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Austin

  • Is there a lounge at ONT?

    If you have a significant wait for your flight from Ontario to Austin, you may want to head over to the Aspire Lounge. For about $37 per adult, you can enjoy food and beverage services as well as have access to charging stations and free Wi-Fi. The lounge in Terminal 4 is open from around 5 am to about 6 am daily, and the one in Terminal 2 is open from about 5 am, and closing times depend on the day of the week.

  • How do I get to downtown Austin from the airport?

    Your public transport options from AUS to downtown include MetroBus 20, which you can catch from just outside the lower level of the Barbara Jordan terminal for about $2.50. There is a taxi stand outside the car rental center with fares starting around $13.80, and you can also hail a ride from services like Lyft.

  • Where can I ask for information at the airport in Austin?

    If you need assistance at the airport or need to find out about your transportation options to Austin, there are information desks located by the baggage claim area near Doors B4 and B5.

  • Does Austin International offer increased accessibility facilities and services?

    Passengers who need additional assistance will find accessible facilities conveniently located across Austin International airport, including parking, restrooms, and elevators. There are videophones available, as well as raised lettering and braille signs. Walkways also have contrasting surfaces for visually impaired travelers, and there are pet relief areas for service animals.

  • What is the cheapest flight from Ontario to Austin?

    In the last 3 days, the lowest price for a flight from Ontario to Austin was $100 for a one-way ticket and $200 for a round-trip.

  • Do I need a passport to fly between Ontario and Austin?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Austin?

    Delta, American Airlines, Alaska Airlines, and Hawaiian Airlines offer inflight Wi-Fi service on the Ontario to Austin flight route.

  • Which aircraft models fly most regularly from Ontario to Austin?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Ontario to Austin flight route.

  • On which days can I fly direct from Ontario to Austin?

    There are nonstop flights from Ontario to Austin on a daily basis.

  • Which is the best airline for flights from Ontario to Austin, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Austin are Southwest and Delta. With an average price for the route of $356 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $369 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Ontario to Austin?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Austin.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Austin?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Austin from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Austin?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Austin with an airline and back to Ontario with another airline. Booking your flights between Ontario and AUS can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Austin?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Austin from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Austin

  • Looking for a cheap flight? 25% of our users found flights on this route for $238 or less one-way and $345 or less round-trip.
  • Ontario International Airport (ONT) serves the Ontario and San Bernadino regions and is about 2 miles from downtown Ontario. Austin–Bergstrom International Airport (AUS) serves the Greater Austin area and is about 5 miles from the city center. Austin International is a focus city for Allegiant Air.
  • While there are non-stop options from Orlando to Austin, you may get a better deal or match your schedule with routes that have one or more stops. This could be Delta stopping in Salt Lake City or United stopping in Denver and Houston.
  • Public transport to ONT includes the Route 61 bus from downtown Ontario to Terminal Way 2 or 4, just a short walk to the entrance. Expect a fare of about $2 a person. Service runs from around 4 am to about 9:30 pm during weekdays and on a shorter schedule on weekends. Or you could grab a cab or use a ride-sharing app like Lyft.
  • If you would rather drive and park your car at Ontario International, there are two daily parking lots. Lot 3 is within walking distance to either Terminal 2 or 4 and costs about $16 a day. Lot 5 is a little further away on John Bangs Drive for $13 a day, and there is a shuttle service to the terminals.
  • Most airlines servicing the flights from Ontario to Austin provide onboard entertainment of some type. You can check each flight's details on KAYAK to see what is available. For example, American Airlines offers free streaming services for your mobile device on flights with onboard Wi-Fi.

Prefer to fly direct from Ontario to Austin?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ontario to Austin Bergstrom.
Find which airlines fly direct from Ontario Airport to Austin Bergstrom Airport, which days they fly and book direct flights.

Direct departures

Ontario to Austin Bergstrom

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Austin Bergstrom to Ontario

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 5 airlines serving from Ontario to Austin

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Austin. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Austin? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4280 reviews
8.6Crew
7.6Entertainment
8.2Boarding
8.0Comfort
7.1Food
Airline reviews

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

10.0 ExcellentMichael, Jun 2025SMF - SEA
Read more Southwest reviews

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

First, my flight was a usual flight nothing exceptional or unexpected. Over all it was a normal, good flight! Second, your questionaire is wholly lacking in the proper options to which one can answer a question. Often on short flights, there is no food let alone entertainment so why isn't that reflected in your questionaire? A simple "not applicable" would cover that issue appropriately but no, your form arbitrarily enters an answer based on the initial assessment which normally isn't factual. Until you provide an accurate means of assessing flights, I'll no longer be completing of these unimpressive and misleading assessements. Thank you!

Easy to book and to get check in and get on and off.

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Delta flight was on time, seats were comfortable, and crew was nice.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

Gate agent did not hold flight for connection, provided no assistance to get new flight

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Oh my gosh, I loved my experience with United! they made me want to travel more often.

The planes are so dirty! Food crumbs and finger print smudges, Dust over the vents and carpet stains. It’s disgusting.

The bag drop personal were not helpful. There was no food on the flight. Boeing aircraft, lousy as always. Everything else was fine.

Asked several times dairy free options and was ignored. Was told chips was the only thing I could have that I should have put it on my profile “which it is”. Very unprofessional. WiFi didn’t work have the flight. Overall a very bad experience.

Plane still had screens for watching movies. Good selection too.

Flight crew was amazing! I don't like that the Polaris seats are side-by-side.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

Boarding on time and fight was early but they didn't let us off the plane on time so we missed our connecting flight to Japan.

DFW-LHR Toilets not kept clean Too cramped. Aisles so narrow crew were constantly banging into people on the aisle seats. Even then, the carts used are reduced width. Other than that it was a decent flight on both legs

Eventless. It was a good flight and good crew. Can’t complaint.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Worst airline experience. They were rude and kept changing our seats and/or giving our seats away so our family didn’t get to sit with each other. Almost everyone we dealt with at both airports with this airline was rude. The app kept giving us wrong information making things take longer. Dealing with them before TSA can take close to an hour…longer than I’ve ever had to deal with before. Never using this airline again.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

Early arrival. Great landing. Pilot updates. Too cold in plane.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.