ONT - AUS

$60 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 5/12. 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, 0 bags

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
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$225
Typical prices: $487-$278
Frontier
Fri 6/5Fri 6/12
ONT - AUS • 1 stop
Cheapest non-stop
$341
Typical prices: $480-$324
Southwest
Fri 5/29Fri 6/5
ONT - AUS • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
ONT offers streamlined security with short wait times.
CapMetro’s Bus Route 20 is the cheapest way to downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $225 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Southwest. Average duration is 2h 40m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $219 (round-trip)
Shortest trip • 4h 50m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 44% price drop
Most popular
Good to know
Good to know
+1
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Austin!
Flight Deals
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Expert advice
Flight 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

Fri, Jun 5 - Fri, Jun 12
Frontier Logo
6:00 am - 8:18 pm
ONT
-
AUS
12h 18m
1 stop
Frontier Logo
6:30 am - 10:05 am
AUS
-
ONT
5h 35m
1 stop
$225Frontier
Thu, May 7 - Sat, May 16
Frontier Logo
4:04 pm - 9:47 pm
ONT
-
AUS
27h 43m
1 stop
Frontier Logo
9:13 pm - 7:35 am
AUS
-
ONT
36h 22m
2 stops
$226Frontier
Fri, May 15 - Mon, May 18
Frontier Logo
6:00 am - 8:18 pm
ONT
-
AUS
12h 18m
1 stop
Frontier Logo
10:42 pm - 3:44 pm
AUS
-
ONT
19h 02m
1 stop
$227Frontier
Mon, Apr 27 - Tue, May 19
Frontier Logo
5:33 pm - 5:18 pm
ONT
-
AUS
21h 45m
1 stop
Frontier Logo
9:13 pm - 11:49 pm
AUS
-
ONT
28h 36m
1 stop
$228Frontier
Tue, Jun 9 - Sat, Jun 13
Frontier Logo
3:34 pm - 11:59 pm
ONT
-
AUS
30h 25m
2 stops
Frontier Logo
2:15 pm - 7:51 pm
AUS
-
ONT
7h 36m
1 stop
$229Frontier
Wed, Jun 17 - Fri, Jun 19
Frontier Logo
6:00 am - 7:30 pm
ONT
-
AUS
11h 30m
1 stop
Frontier Logo
8:15 pm - 11:49 pm
AUS
-
ONT
5h 34m
1 stop
$230Frontier
Sat, Jun 6 - Mon, Jun 8
Frontier Logo
10:50 am - 8:18 pm
ONT
-
AUS
7h 28m
1 stop
Frontier Logo
10:52 pm - 10:05 am
AUS
-
ONT
13h 13m
2 stops
$231Frontier
Thu, Apr 23 - Mon, Apr 27
Frontier Logo
12:59 am - 8:52 pm
ONT
-
AUS
17h 53m
1 stop
Frontier Logo
9:57 pm - 6:49 pm
AUS
-
ONT
22h 52m
1 stop
$232Frontier
Sun, May 31 - Sun, Jun 7
Frontier Logo
11:51 am - 10:04 pm
ONT
-
AUS
8h 13m
1 stop
Frontier Logo
10:52 pm - 3:09 pm
AUS
-
ONT
18h 17m
1 stop
$234Frontier
Mon, Apr 27 - Mon, May 18
Frontier Logo
2:05 pm - 5:18 pm
ONT
-
AUS
25h 13m
2 stops
Frontier Logo
9:13 pm - 11:49 pm
AUS
-
ONT
28h 36m
1 stop
$237Frontier
Booking Insights

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.

How much is a round-trip flight from Ontario to Austin?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Austin departing in June.

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 Saturdays 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 January, where tickets cost $190 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $452 and $450 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 3 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Austin

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

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.

Harriet Baskas

Harriet Baskas

Expert on AUS

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.

Good to know

Low seasonJanuary
Cheapest flight$60
Best time to beat the crowds with an average 44% drop in price.
Most popular time to fly and prices are also 7% 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 $60 for a one-way ticket and $225 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?

    Alaska Airlines, Delta, American Airlines, Hawaiian Airlines, and JetBlue 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.

  • Which airline alliances offer flights from Ontario to Austin?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Ontario and Austin, with Star Alliance being the most commonly used for this route.

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

    You can catch a nonstop flight from Ontario to Austin on on Monday, Tuesday, Wednesday, Thursday, Friday, and Sunday.

  • 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 $400 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 $312 and an overall rating of 7.9.

  • 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 $243 or less one-way and $455 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 4328 reviews
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
Airline reviews

One of the best airlines for fast boarding, on time arrivals, and top notch service!

10.0 ExcellentSunderesh, Apr 2026
OKC - AUS
Read more Southwest reviews

One of the best airlines for fast boarding, on time arrivals, and top notch service!

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

No delays and arrived to destination 30 min early. Staff was super friendly.

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Smaller plane for a longer flight than my first one. Doesn’t make sense.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

We purchase first class seats for the first time for multiples of standard economy ticket. There was no access to the club lounge and no priority boarding. The meal and the service once on the plane were superior and the seat was nicer, but not worth the price difference. I will be happy to seat in economy and spend the difference on more travel.

It isvvery small flight. No leg room . No space to put my personal item at feet.

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

Everything was on time and service on the flight was great!

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

American flight was diverted and delayed but app didn’t show that information so I wasn’t able to change my connection until the last min.

The plane was very creaky and lots of ringing. Plane was dirty and dingy. I couldn't hear the captain's announcements from the flight deck. Not sure if it was the captain or the audio equipment, but good thing there wasn't an emergency where we needed clear instructions. The overhead compartments were clearly full, but the flight crew allowed people to stand in the back with their carry on luggage. Then after everyone boarded, they had to go to the front to gate check their luggage because there was no room for their bags and then they returned to their seats...such a waste of time when clearly the overhead compartments were full when they originally boarded.

Air condition was not working for long both after boarding and also after landing ; unbearably hot and suffocating

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

Human interaction. Thought there would be more service-even a smile would have been nice.

It was canceled at the last minute. While I was literally at the airport. Messed my entire trip up.

Moved to earlier flight which unexpectedly had maintenance issues initially indicated as quick fix to ultimately plane changes. Moved back to original flight, also delayed. In all cases customer updates and communication very unclear, no updates on drivers for delays.

Better snacks but flight and crew were amazing on this flight

It was the most un-special flight experience in my life.

The flight attendant in business class was excellent! Professional, friendly and attentive.

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

baggage clamed had to wait over a hour and half for all people on my flight it was terrible

My flight was canceled I was promised a reginf still not received.

The confirmation # CK8GNW and my name was not recognized/in Frontier system. I was able to check in on Frintier app so i went to the Frontier ticket agent, at time they told me that my name/ confirmation did not show up as a purchased ticket. I had to purchase a new ticket that cost $289.00 one way.

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.

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

Other airlines flying from Ontario to Austin

Flights from the other most popular airlines that fly from Ontario to Austin according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.