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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 2/11. 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
6:15 am - 9:50 pm
ONT
-
AUS
13h 35m
1 stop
Frontier Logo
6:45 am - 11:59 pm
AUS
-
ONT
19h 14m
1 stop
$126Frontier
Sat, Mar 7 - Tue, Mar 10
Frontier Logo
6:00 am - 12:16 am
ONT
-
AUS
16h 16m
1 stop
Frontier Logo
4:45 pm - 1:52 pm
AUS
-
ONT
23h 07m
1 stop
$128Frontier
Sat, Feb 21 - Mon, Feb 23
Frontier Logo
7:17 pm - 11:29 am
ONT
-
AUS
14h 12m
1 stop
Frontier Logo
3:54 pm - 9:29 pm
AUS
-
ONT
7h 35m
1 stop
$140Frontier
Wed, Feb 25 - Sun, Mar 1
Frontier Logo
7:17 pm - 2:59 pm
ONT
-
AUS
17h 42m
1 stop
Frontier Logo
10:45 pm - 11:59 pm
AUS
-
ONT
27h 14m
1 stop
$143Frontier
Wed, Feb 25 - Fri, Mar 6
Frontier Logo
6:10 am - 9:21 am
ONT
-
AUS
25h 11m
1 stop
Frontier Logo
8:30 am - 9:34 pm
AUS
-
ONT
15h 04m
1 stop
$144Frontier
Sun, Feb 22 - Tue, Feb 24
Frontier Logo
6:15 am - 10:06 am
ONT
-
AUS
25h 51m
1 stop
Frontier Logo
10:55 pm - 1:28 pm
AUS
-
ONT
16h 33m
1 stop
$145Frontier
Fri, Mar 6 - Mon, Mar 9
Frontier Logo
8:40 am - 11:13 pm
ONT
-
AUS
12h 33m
1 stop
Frontier Logo
10:58 pm - 11:59 pm
AUS
-
ONT
27h 01m
1 stop
$148Frontier
Wed, Feb 25 - Sun, Mar 8
Frontier Logo
8:40 am - 11:13 pm
ONT
-
AUS
12h 33m
1 stop
Frontier Logo
10:58 pm - 11:59 pm
AUS
-
ONT
27h 01m
1 stop
$149Frontier
Wed, Mar 4 - Sun, Mar 8
Frontier Logo
6:00 am - 12:16 am
ONT
-
AUS
16h 16m
1 stop
Frontier Logo
4:45 pm - 1:52 pm
AUS
-
ONT
23h 07m
1 stop
$154Frontier
Sat, Feb 21 - Mon, Feb 23
Frontier Logo
6:00 am - 12:16 am
ONT
-
AUS
16h 16m
1 stop
Frontier Logo
4:45 pm - 1:52 pm
AUS
-
ONT
23h 07m
1 stop
$156Frontier
Sat, Feb 21 - Mon, Feb 23

Frontier flights from Ontario to Austin

Our best Frontier deals on Ontario to Austin flight tickets
Frontier
Feb 25
ONT7:17 pmOntario
14h 12m
1 stop
AUS11:29 amAustin Bergstrom
Mar 4
AUS8:30 amAustin Bergstrom
15h 04m
1 stop
ONT9:34 pmOntario
$126
Frontier
Feb 21
ONT6:00 amOntario
16h 16m
1 stop
AUS12:16 amAustin Bergstrom
Feb 28
AUS3:57 pmAustin Bergstrom
5h 17m
1 stop
ONT7:14 pmOntario
$128
Frontier
Feb 24
ONT8:35 amOntario
12h 38m
1 stop
AUS11:13 pmAustin Bergstrom
Feb 28
AUS3:57 pmAustin Bergstrom
5h 17m
1 stop
ONT7:14 pmOntario
$129

American Airlines flights from Ontario to Austin

Our best American Airlines deals on Ontario to Austin flight tickets
American Airlines
Feb 1
ONT11:59 pmOntario
6h 26m
1 stop
AUS8:25 amAustin Bergstrom
Feb 7
AUS6:05 amAustin Bergstrom
7h 58m
2 stops
ONT12:03 pmOntario
$416
American Airlines
Jan 27
ONT12:57 pmOntario
7h 31m
2 stops
AUS10:28 pmAustin Bergstrom
Jan 29
AUS2:39 pmAustin Bergstrom
5h 41m
1 stop
ONT6:20 pmOntario
$456
American Airlines
Jan 27
ONT12:57 pmOntario
7h 31m
2 stops
AUS10:28 pmAustin Bergstrom
Jan 28
AUS11:45 amAustin Bergstrom
8h 35m
2 stops
ONT6:20 pmOntario
$462

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 January 24, 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

Sat 3/7

6:15 am-9:50 pm

1 stop13h 35m

Austin Bergstrom

Tue 3/10

6:45 am-11:59 pm

1 stop19h 14m

$126

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 2/21

6:00 am-12:16 am

1 stop16h 16m

Austin Bergstrom

Mon 2/23

4:45 pm-1:52 pm

1 stop23h 07m

$128

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 2/25

7:17 pm-11:29 am

1 stop14h 12m

Austin Bergstrom

Sun 3/1

3:54 pm-9:29 pm

1 stop7h 35m

$140

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 2/25

7:17 pm-2:59 pm

1 stop17h 42m

Austin Bergstrom

Fri 3/6

10:45 pm-11:59 pm

1 stop27h 14m

$143

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sun 2/22

6:10 am-9:21 am

1 stop25h 11m

Austin Bergstrom

Tue 2/24

8:30 am-9:34 pm

1 stop15h 04m

$144

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Fri 3/6

6:15 am-10:06 am

1 stop25h 51m

Austin Bergstrom

Mon 3/9

10:55 pm-1:28 pm

1 stop16h 33m

$145

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 2/25

8:40 am-11:13 pm

1 stop12h 33m

Austin Bergstrom

Sun 3/8

10:58 pm-11:59 pm

1 stop27h 01m

$148

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Wed 3/4

8:40 am-11:13 pm

1 stop12h 33m

Austin Bergstrom

Sun 3/8

10:58 pm-11:59 pm

1 stop27h 01m

$149

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 2/21

6:00 am-12:16 am

1 stop16h 16m

Austin Bergstrom

Mon 2/23

4:45 pm-1:52 pm

1 stop23h 07m

$154

OntarioAustin

ONT - AUS

ONTAUS

Ontario

Sat 2/21

6:00 am-12:16 am

1 stop16h 16m

Austin Bergstrom

Mon 2/23

4:45 pm-1:52 pm

1 stop23h 07m

$156

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $297. 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 $390.

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 $347. 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 $326 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 35% 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 January 2026, prices for Ontario to Austin flights are approximately 41% 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

$173

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 $173. The best round-trip flight deal from Ontario to Austin found on momondo in the last 72 hours is $440.
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
3,058 reviews
Search Frontier flights
DeltaPriceFrom $120Free CancellationRating
7.9
8,110 reviews
Search Delta flights
SouthwestPriceFrom $234Free CancellationRating
8.0
4,268 reviews
Search Southwest flights
American AirlinesPriceFrom $240Free CancellationRating
7.2
11,192 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 9 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 $369. 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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