AUS - ONT

$106 Find Cheap Flights from Austin to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Austin to Ontario departing on 6/26. 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 Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Austin to Ontario, 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 Austin to Ontario, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Austin to Ontario (AUS-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Austin to Ontario 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 Austin to Ontario

Mon, Jun 30 - Fri, Jul 4
Frontier Logo
1:53 pm - 8:51 pmAUS-ONT
8h 58m1 stop
Frontier Logo
6:00 am - 12:58 pmONT-AUS
4h 58m1 stop
$200Frontier
Find Deal
Tue, Jul 1 - Fri, Jul 11
Frontier Logo
7:00 am - 11:50 pmAUS-ONT
18h 50m1 stop
Frontier Logo
7:22 pm - 2:30 pmONT-AUS
17h 08m1 stop
$210Frontier
Find Deal
Wed, Aug 6 - Tue, Aug 12
Southwest Logo
1:00 pm - 2:00 pmAUS-ONT
3h 00mnonstop
Southwest Logo
12:45 pm - 5:35 pmONT-AUS
2h 50mnonstop
$237Southwest
Find Deal
Wed, Sep 10 - Wed, Sep 24
Delta Logo
1:28 pm - 7:11 pmAUS-ONT
7h 43m1 stop
Delta Logo
10:59 pm - 11:13 amONT-AUS
10h 14m1 stop
$247Delta
Find Deal
Sat, Sep 13 - Wed, Sep 24
Delta Logo
12:20 pm - 7:42 pmAUS-ONT
9h 22m1 stop
Delta Logo
1:00 pm - 9:13 pmONT-AUS
6h 13m1 stop
$260Delta
Find Deal
Wed, Aug 6 - Tue, Aug 12
Southwest Logo
4:10 pm - 9:00 pmAUS-ONT
6h 50m1 stop
Southwest Logo
8:35 am - 6:05 pmONT-AUS
7h 30m2 stops
$273Southwest
Find Deal
Mon, Aug 4 - Mon, Aug 11
United Airlines Logo
4:20 pm - 9:37 pmAUS-ONT
7h 17m1 stop
United Airlines Logo
6:00 am - 3:22 pmONT-AUS
7h 22m1 stop
$307United Airlines
Find Deal
Thu, Aug 28 - Tue, Sep 2
United Airlines Logo
5:55 pm - 9:25 pmAUS-ONT
5h 30m1 stop
United Airlines Logo
1:42 pm - 10:57 pmONT-AUS
7h 15m1 stop
$322United Airlines
Find Deal
Sat, Jul 19 - Fri, Jul 25
American Airlines Logo
5:25 pm - 10:34 pmAUS-ONT
7h 09m1 stop
American Airlines Logo
12:59 am - 8:54 amONT-AUS
5h 55m1 stop
$341American Airlines
Find Deal
Thu, Jul 3 - Sun, Jul 6
American Airlines Logo
2:40 pm - 6:12 pmAUS-ONT
5h 32m1 stop
American Airlines Logo
12:59 am - 10:14 amONT-AUS
7h 15m1 stop
$424American Airlines
Find Deal
Expert advice

Expert advice for your flight from Austin to Ontario

 
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
AUS

AUS offers live music on 8 stages, making it a vibrant start to your journey. Check the schedule or explore to find performances.

Read more about AUSby Harriet Baskas
ONT

For budget-friendly travel, use Omnitrans Bus Route 61 from ONT to connect with local transit centers. It runs every 15 minutes during peak hours.

Read more about ONTby Jennifer Simonson
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 Austin to Ontario flights

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

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Austin to Ontario, 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 Austin to Ontario is January, where tickets cost $283 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $432 and $378 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Austin to Ontario, 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 Austin to Ontario, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$106
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Austin to Ontario

When to book flights from Austin to Ontario

Are your dates flexible? Find out the best times to travel from Austin to Ontario 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 Austin to Ontario

  • What is the cheapest flight from Austin to Ontario?

    In the last 3 days, the lowest price for a flight from Austin to Ontario was $106 for a one-way ticket and $200 for a round-trip.

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

    No, a passport isn't needed to fly from Austin to Ontario. However, local authorities might ask for an official ID.

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Austin to Ontario are Southwest and Delta. With an average price for the route of $383 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 $367 and an overall rating of 8.0.

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

    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 Austin to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Austin 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 Austin to Ontario?

    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 Ontario with an airline and back to Austin with another airline. Booking your flights between Austin and ONT 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 Austin to Ontario?

    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 Ontario from Austin 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 Austin to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $193 or less one-way and $313 or less round-trip.

Prefer to fly direct from Austin to Ontario?

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

Direct departures

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

Direct returns

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

Reviews of the top 5 airlines serving from Austin to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Austin to Ontario. 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 Austin to Ontario? 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
7.6Entertainment
8.0Comfort
8.6Crew
8.2Boarding
7.1Food
Airline reviews

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

10.0 ExcellentKurt V, May 2025AUS - ABQ
Read more Southwest reviews

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

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

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

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

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

The last 30 min or so, they put the heat on full. We thought we were being basted.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

Seats are much much more comfortable than United, which is what I usually fly

If I pay extra for "comfort+" I expect leg room where I can stretch my legs. I was seated with an attendant's seat blocking my feet. Knee space was fine but my feet had less room than the non-"comfort+" seats. Also, don't go cheap on food when you have flights of 3+ hours. It's insulting.

Only one side of the heafphone jack work. Crew was friendly and helpful.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

United out of SFO is having issues with catering so none of our meals were loaded on the plane and no offer of compensation for our tickets purchased was offered.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Food choices were very limited. Taste of the dishes was average.

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

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

Long 5 hour and 45 min flight and only one drink service and cookie snack

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Flight boarded from Gate 39 at OGG, the farthest gate in the terminal. There were no Hawaiian themed amenities for the flight. The first class service was mediocre at best; I received not special welcome or recognition as an executive platinum member of American Advantage program. The flight attendants were more concerned with their cell phones than saying "thank you" to the passengers as we disembarked. Fortunately, the flight arrived at LAX a few minutes early.

Bigger seats. Board back to front! Disembark front to back!

Extraordinary service in business class, and very good breakfast and snacks. A really lovely flight.

This flight didn’t happen because AA agents didn’t let us board the flight

Plane was pretty clean, staff was friendly and helpful, flight left about on time arrived early. Took a long time to board and get off the plane - carry on items didn't have enough room so people had to move all around to find places.

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Book with frontier airlines with the mentality that they'll cancel your flight, kick you off and lose your luggage. Anything besides that is a win. Compare prices with other airlines (to include luggage) and if frontier is still worth it, book it but know all of their policies.

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

The reps working at the airport counter were dumber than a second coat of paint.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

Landing in terminal 2, but my luggage is terminal 3. We (and others) were looking for it in terminal 1. We probably missed the crew broadcast, but the communication could have been clearer for non native (or elderly) passengers.

Everything went as planned. Crew was great. Seats were still not that comfortable.

Would be great if Frontier can Assign Seats together under one PNR

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 Austin to Ontario

Information on your arrival and departure airports

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