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$79+ Cheap flights from Austin to Ontario (AUS - ONT)

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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — ONT
may. 17 — may. 241
sáb. 5/17
sáb. 5/24
1 adult, Economy
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Cheapflights Tip: The best prices from Austin Bergstrom to Ontario are usually found in September or January, booked 76 days in advance, depart on a Tuesday or Saturday and return on a Tuesday

Cheap flight deals from Austin to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) to Ontario (ONT). 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 mayo 12, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$200
(Frontier)

One-way from

$79
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$315

Good round-trip deal

$328 or less

Good one-way deal

$129 or less
Provider with most accurate pricing for Austin Bergstrom-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Austin Bergstrom-Ontario flights.
Search Deals
From Austin Bergstrom to Ontario
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One-way flight from Austin Bergstrom to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
Search Deals
Price to beat on a round-trip flight from Austin Bergstrom to Ontario.
Search Deals
Price to beat on a one-way flight from Austin Bergstrom to Ontario.
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Find flight deals from Austin to Ontario

Cheapest flights from Austin to Ontario
Explore the most affordable flight options available from Austin to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on mayo 12, 2025.

This Frontier deal was found by Cheapflights users on 5/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/315:08 pmAUS - ONT
1 stop5h 41mFrontier
lun. 6/26:00 amONT - AUS
1 stop4h 58mFrontier
Deal found 5/10$200
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/96:00 pmAUS - ONT
1 stop7h 59mAlaska Airlines
mié. 8/66:10 pmONT - AUS
1 stop20h 46mAlaska Airlines
Deal found 5/11$246
This Delta deal was found by Cheapflights users on 5/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/106:20 amAUS - ONT
1 stop10h 09mDelta
mié. 6/1811:25 amONT - AUS
1 stop10h 33mDelta
Deal found 5/11$247
This Southwest deal was found by Cheapflights users on 5/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/93:05 pmAUS - ONT
Nonstop2h 55mSouthwest
sáb. 8/26:15 amONT - AUS
Nonstop2h 50mSouthwest
Deal found 5/11$257
This Hawaiian Airlines deal was found by Cheapflights users on 5/12. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/267:15 amAUS - ONT
1 stop9h 31mHawaiian Airlines
jue. 7/316:58 pmONT - AUS
1 stop9h 09mHawaiian Airlines
Deal found 5/12$277
This United Airlines deal was found by Cheapflights users on 5/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/45:30 amAUS - ONT
1 stop8h 44mUnited Airlines
mié. 6/185:10 amONT - AUS
1 stop5h 44mUnited Airlines
Deal found 5/12$327
This American Airlines deal was found by Cheapflights users on 5/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/512:05 pmAUS - ONT
1 stop6h 08mAmerican Airlines
jue. 6/126:23 amONT - AUS
1 stop5h 32mAmerican Airlines
Deal found 5/11$353

Cheapflights Fare Finder

Customize your flight search to find flights from Austin to Ontario 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 mayo 12, 2025.
Use the filters below to find and compare flights from Austin to Ontario that are best for you.

Fly from

Austin

Fly to

Ontario

Route

Depart

Return

Price

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

sáb. 5/31

5:08 pm-8:49 pm

1 stop5h 41m

Ontario

lun. 6/2

6:00 am-12:58 pm

1 stop4h 58m

$200

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

mié. 7/9

6:00 pm-11:59 pm

1 stop7h 59m

Ontario

mié. 8/6

6:10 pm-4:56 pm

1 stop20h 46m

$246

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

mar. 6/10

2:30 pm-10:25 pm

1 stop9h 55m

Ontario

mar. 6/17

10:05 pm-9:30 am

1 stop9h 25m

$247

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

mié. 7/9

3:05 pm-4:00 pm

Nonstop2h 55m

Ontario

sáb. 8/2

6:15 am-11:05 am

Nonstop2h 50m

$257

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

sáb. 7/26

7:15 am-2:46 pm

1 stop9h 31m

Ontario

jue. 7/31

6:58 pm-6:07 am

1 stop9h 09m

$277

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

mié. 6/4

5:30 am-12:14 pm

1 stop8h 44m

Ontario

mié. 6/18

5:10 am-12:54 pm

1 stop5h 44m

$327

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

jue. 6/5

12:05 pm-4:13 pm

1 stop6h 08m

Ontario

jue. 6/12

6:23 am-1:55 pm

1 stop5h 32m

$353

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

sáb. 6/14

3:10 pm-9:51 pm

1 stop8h 41m

$79

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

mié. 7/2

3:05 pm-4:00 pm

Nonstop2h 55m

$117

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

mar. 7/1

5:59 pm-10:45 pm

1 stop6h 46m

$122

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

Showing 1-10 of 13 results
1
2

Compare providers for flights from Austin to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Austin to Ontario in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Austin-Ontario flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Austin-Ontario flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Austin-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Austin-Ontario flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Austin-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Austin to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Austin 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 Austin to Ontario

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

Use this chart to determine the optimal time to book a round-trip flight from Austin to Ontario. Price data was last updated on May 9, 2025.

To ensure you get the cheapest price possible for a flight from Austin to Ontario, you should look to book at least 76 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Austin to Ontario?

Currently, August is the cheapest month in which you can book a flight from Austin to Ontario (average of $246). Flying from Austin to Ontario in March is currently the most expensive (average of $328). 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 AUS to ONT?

Find hourly flight availability from Austin to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated mayo 12, 2025.

When flying from Austin to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 21% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Austin to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Austin to Ontario flight should consider departing on Wednesday 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated mayo 12, 2025.
To help decide which airline to fly from Austin to Ontario, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.9

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.9

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,288 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.9

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.9

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,432 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.9

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Comfort

7.9

Entertainment

7.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Austin to Ontario. 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 Austin to Ontario?

    If you wish to fly to Ontario from Austin, then you need to book flights from Austin Bergstrom to Ontario. There is 1 flight from Austin Bergstrom (AUS) to Ontario (ONT) per day to choose from. Flights to Ontario from Austin Bergstrom are available from 5 different airlines, which means you should have some options if you want to compare airfare deals. 2h 55m is how long a nonstop flight from Austin to Ontario typically takes.

  • How popular is this Austin to Ontario flight route?

    The Austin Bergstrom to Ontario flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Austin to Ontario round-trip?

    According to our current data, Frontier ($200), Alaska Airlines ($246), and Delta ($247) offers the cheapest pricing from Austin to Ontario. These flights start at 40% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Austin to Ontario one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $79. Southwest flights start at $117 while deals on Delta start at $122 one-way.

  • What are the cheapest flights from Austin to Ontario?

    The cheapest flight price from Austin to Ontario is $119. On average you can expect to pay $301. The most popular route, (Austin Bergstrom - Ontario), can usually be booked for $210.

  • Can I find deals for flights from Austin to Ontario that include hotel bookings?

    Yes. In addition to deals on Austin to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Austin to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Austin to Ontario.

  • Can I find deals for business class flights from Austin to Ontario?

    Yes. Cheapflights offers flight deals from Austin to Ontario 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 Austin to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Austin to Ontario (average of $246). Flying from Austin to Ontario in March is currently the most expensive (average of $328). 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

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Alternative routes for Austin to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Austin to Ontario

Discover the top 5 airlines that operate flights from Austin to Ontario. 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 mayo 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$108Average$235FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$190Average$370FlexibilityNo cancel feeOn-time71%
DeltaCheapest$221Average$369FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$230Average$379FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$295Average$502FlexibilityNo cancel feeOn-time69%

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