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Cheap flights from Ontario to Austin from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Austin departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Austin

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
10:03 pm - 9:06 pm
ONT
-
AUS
21h 03m
1 stop
Frontier Logo
10:01 pm - 8:04 am
AUS
-
ONT
12h 03m
1 stop
$136Frontier
Wed, Apr 8 - Sun, Apr 12
Frontier Logo
1:55 pm - 6:49 pm
ONT
-
AUS
26h 54m
1 stop
Frontier Logo
9:29 pm - 8:06 am
AUS
-
ONT
12h 37m
1 stop
$138Frontier
Sun, Mar 15 - Thu, Mar 19
Frontier Logo
6:00 am - 12:16 am
ONT
-
AUS
16h 16m
1 stop
Frontier Logo
8:30 am - 9:34 pm
AUS
-
ONT
15h 04m
1 stop
$139Frontier
Sat, Feb 21 - Tue, Feb 24
Frontier Logo
6:00 am - 12:16 am
ONT
-
AUS
16h 16m
1 stop
Frontier Logo
10:06 am - 11:59 pm
AUS
-
ONT
15h 53m
1 stop
$148Frontier
Sat, Feb 28 - Mon, Mar 2
Frontier Logo
8:35 am - 11:13 pm
ONT
-
AUS
12h 38m
1 stop
Frontier Logo
9:59 pm - 1:26 pm
AUS
-
ONT
17h 27m
1 stop
$149Frontier
Tue, Feb 24 - Thu, Feb 26
Frontier Logo
3:30 pm - 12:45 pm
ONT
-
AUS
19h 15m
1 stop
Frontier Logo
6:45 am - 11:59 pm
AUS
-
ONT
19h 14m
1 stop
$153Frontier
Mon, Mar 16 - Thu, Mar 19
Frontier Logo
8:40 am - 11:13 pm
ONT
-
AUS
12h 33m
1 stop
Frontier Logo
6:45 am - 11:59 pm
AUS
-
ONT
19h 14m
1 stop
$154Frontier
Tue, Mar 3 - Tue, Mar 10
Frontier Logo
6:00 am - 9:21 am
ONT
-
AUS
25h 21m
1 stop
Frontier Logo
3:57 pm - 7:14 pm
AUS
-
ONT
5h 17m
1 stop
$160Frontier
Sat, Feb 21 - Sat, Feb 28
Frontier Logo
8:40 am - 11:13 pm
ONT
-
AUS
12h 33m
1 stop
Frontier Logo
9:59 pm - 8:06 am
AUS
-
ONT
12h 07m
1 stop
$163Frontier
Tue, Mar 3 - Thu, Mar 5
Frontier Logo
6:05 am - 12:16 am
ONT
-
AUS
16h 11m
1 stop
Frontier Logo
6:45 am - 11:59 pm
AUS
-
ONT
19h 14m
1 stop
$164Frontier
Thu, Feb 19 - Mon, Feb 23

Frontier flights from Ontario to Austin

Our best Frontier deals on Ontario to Austin flight tickets
Frontier
Apr 8
ONT10:03 pmOntario
21h 03m
1 stop
AUS9:06 pmAustin Bergstrom
Apr 12
AUS10:01 pmAustin Bergstrom
12h 03m
1 stop
ONT8:04 amOntario
$136
Frontier
Feb 21
ONT6:00 amOntario
16h 16m
1 stop
AUS12:16 amAustin Bergstrom
Feb 24
AUS8:30 amAustin Bergstrom
15h 04m
1 stop
ONT9:34 pmOntario
$139
Frontier
Feb 28
ONT6:00 amOntario
16h 16m
1 stop
AUS12:16 amAustin Bergstrom
Mar 2
AUS10:06 amAustin Bergstrom
15h 53m
1 stop
ONT11:59 pmOntario
$148

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Austin 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, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Ontario to Austin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 4/8

10:03 pm-9:06 pm

1 stop21h 03m

Austin Bergstrom

Sun 4/12

10:01 pm-8:04 am

1 stop12h 03m

$136

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sun 3/15

1:55 pm-6:49 pm

1 stop26h 54m

Austin Bergstrom

Thu 3/19

9:29 pm-8:06 am

1 stop12h 37m

$138

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 2/21

6:00 am-12:16 am

1 stop16h 16m

Austin Bergstrom

Tue 2/24

8:30 am-9:34 pm

1 stop15h 04m

$139

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 2/28

6:00 am-12:16 am

1 stop16h 16m

Austin Bergstrom

Mon 3/2

10:06 am-11:59 pm

1 stop15h 53m

$148

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 2/24

8:35 am-11:13 pm

1 stop12h 38m

Austin Bergstrom

Thu 2/26

9:59 pm-1:26 pm

1 stop17h 27m

$149

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Mon 3/16

3:30 pm-12:45 pm

1 stop19h 15m

Austin Bergstrom

Thu 3/19

6:45 am-11:59 pm

1 stop19h 14m

$153

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 3/3

8:40 am-11:13 pm

1 stop12h 33m

Austin Bergstrom

Tue 3/10

6:45 am-11:59 pm

1 stop19h 14m

$154

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 2/21

6:00 am-9:21 am

1 stop25h 21m

Austin Bergstrom

Sat 2/28

3:57 pm-7:14 pm

1 stop5h 17m

$160

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Tue 3/3

8:40 am-11:13 pm

1 stop12h 33m

Austin Bergstrom

Thu 3/5

9:59 pm-8:06 am

1 stop12h 07m

$163

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Thu 2/19

6:05 am-12:16 am

1 stop16h 11m

Austin Bergstrom

Mon 2/23

6:45 am-11:59 pm

1 stop19h 14m

$164

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to Austin from

How to get the cheapest flight ticket from Ontario to Austin

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Austin?

The cheapest month to fly to Austin from Ontario is in January. Flight prices, which tend to average around $233, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in January, then April is your next best option. Flight prices from Ontario to Austin during April average around $258.

What is the cheapest day to depart on your flight to Austin?

The cheapest day to depart on your flight to Austin is on a Saturday when prices can be found for as low as $298. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Austin for around $386.

What is the cheapest time of day to depart on your flight to Austin?

In the evening is the cheapest time of day to fly from Ontario to Austin when you can find flight prices for as low as $320. Flying to Austin in the evening is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly in the morning, with an average ticket price of $346. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ontario to Austin Bergstrom flight route?

Fly from Ontario to Austin Bergstrom for the best Ontario - Austin Bergstrom flight prices

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

You are more likely to see cheaper flights to Austin from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $327 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from Ontario for as low as $271 on momondo.

What cabin class options are available on Ontario to Austin Bergstrom flights?

There is only 1 cabin class available to choose from on Ontario to Austin Bergstrom flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to Austin flights?

You could potentially save up to 2% on your flight if you consider stops on a Ontario to Austin flight.

How have Ontario to Austin flight prices changed over time?

As of February 2026, prices for Ontario to Austin flights are approximately 69% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Austin

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Austin according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Austin (ONT to AUS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Austin

Best Price Found

$194

Fastest flight time

2h 40m

Direct flights

Every day

Airports in Austin

1 airport
The best one-way flight to Austin from Ontario in the past 72 hours is $194. The best round-trip flight deal from Ontario to Austin found on momondo in the last 72 hours is $397.
The fastest flight from Ontario to Austin takes 2h 40m
Direct flights go from Ontario to Austin every day.
There is 1 airport in Austin. From Ontario there are direct flights to Austin Bergstrom (AUS).
Search flight deals

  • How far is Ontario to Austin Bergstrom by plane?

    Ontario and Austin Bergstrom are 1190.2 mi apart from one another. Typically, this will take 2h 40m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to Austin Bergstrom Airport?

    Prices for flights from Ontario Airport to Austin Bergstrom Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Austin Bergstrom Airport?

  • How old do you have to be to fly from Ontario Airport to Austin Bergstrom Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Austin Bergstrom Airport.

  • What documentation or ID do you need to fly to Austin Bergstrom Airport?

    The required travel and health documents for your Austin Bergstrom Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Austin Bergstrom Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ontario to Austin?

  • What is the most popular airline from Ontario to Austin?

Best airlines flying from Ontario to Austin

Compare and see reviews for airlines that fly from Ontario to Austin with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $114Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
DeltaPriceFrom $120Free CancellationRating
7.9
8,138 reviews
Search Delta flights
SouthwestPriceFrom $234Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
American AirlinesPriceFrom $240Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights

  • Southwest Flights From Ontario to Austin

    Southwest is one of the most popular airlines flying from Ontario to Austin, operating 8 flights/week on average for this route. A good Southwest flight deal for Ontario to Austin starts from $234 round-trip, up to an average price of $370. Our users have rated Southwest at 8.0/10.

Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Fredericksburg
Wimberley
San Marcos
Round Rock
Georgetown
Canyon Lake
Marble Falls
Cedar Park
Horseshoe Bay
Dripping Springs
Pflugerville
Kyle
Seguin
Bastrop
Buda
Flatonia

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Austin?

It is quick and easy to find Ontario to Austin flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Austin that suits you.

Can I find flights from Ontario to Austin with flexible booking policies on momondo?

Flights from Ontario to Austin with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ontario to Austin?

Once you have performed a search for Ontario to Austin flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to Austin right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Austin flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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