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Cheap flights from Ontario to Austin from $108

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 9/8. 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

Frontier Logo
6:00 am - 1:04 pmONT-AUS
5h 04m1 stop
Frontier Logo
1:59 pm - 8:52 pmAUS-ONT
8h 53m1 stop
$175Frontier
Find Deal
Thu, Aug 14 - Mon, Aug 18
Frontier Logo
6:00 am - 1:04 pmONT-AUS
5h 04m1 stop
Frontier Logo
1:59 pm - 11:53 amAUS-ONT
23h 54m1 stop
$185Frontier
Find Deal
Thu, Aug 7 - Sun, Aug 17
Frontier Logo
6:00 am - 1:04 pmONT-AUS
5h 04m1 stop
Frontier Logo
3:15 pm - 9:52 pmAUS-ONT
8h 37m1 stop
$197Frontier
Find Deal
Thu, Aug 7 - Sat, Aug 16
Southwest Logo
6:20 am - 1:30 pmONT-AUS
5h 10m1 stop
Southwest Logo
1:00 pm - 2:00 pmAUS-ONT
3h 00mnonstop
$247Southwest
Find Deal
Tue, Aug 5 - Tue, Aug 12
American Airlines Logo
12:59 am - 10:14 amONT-AUS
7h 15m1 stop
American Airlines Logo
2:46 pm - 6:08 pmAUS-ONT
5h 22m1 stop
$249American Airlines
Find Deal
Mon, Jul 7 - Tue, Jul 15
Southwest Logo
5:45 am - 2:55 pmONT-AUS
7h 10m2 stops
Southwest Logo
9:20 am - 12:55 pmAUS-ONT
5h 35m1 stop
$258Southwest
Find Deal
Thu, Oct 2 - Tue, Oct 7
Delta Logo
2:14 pm - 11:56 pmONT-AUS
7h 42m1 stop
Delta Logo
1:28 pm - 7:20 pmAUS-ONT
7h 52m1 stop
$259Delta
Find Deal
Tue, Jul 22 - Sat, Jul 26
United Airlines Logo
6:10 am - 2:14 pmONT-AUS
6h 04m1 stop
United Airlines Logo
5:00 am - 12:14 pmAUS-ONT
9h 14m2 stops
$262United Airlines
Find Deal
Tue, Aug 5 - Tue, Aug 12
Delta Logo
1:15 pm - 9:02 pmONT-AUS
5h 47m1 stop
Delta Logo
2:45 pm - 10:41 pmAUS-ONT
9h 56m1 stop
$273Delta
Find Deal
Wed, Sep 10 - Mon, Sep 22
United Airlines Logo
1:19 pm - 11:59 pmONT-AUS
8h 40m2 stops
United Airlines Logo
11:05 am - 5:25 pmAUS-ONT
8h 20m1 stop
$342United Airlines
Find Deal
Wed, Aug 6 - Mon, Aug 11

Frontier flights from Ontario to Austin

Our best Frontier deals on Ontario to Austin flight tickets
Frontier
Aug 14
ONT6:00 amOntario
5h 04m
1 stop
AUS1:04 pmAustin Bergstrom
Aug 18
AUS1:59 pmAustin Bergstrom
8h 53m
1 stop
ONT8:52 pmOntario
Frontier
Aug 7
ONT6:00 amOntario
5h 04m
1 stop
AUS1:04 pmAustin Bergstrom
Aug 17
AUS1:59 pmAustin Bergstrom
23h 54m
1 stop
ONT11:53 amOntario
Frontier
Aug 7
ONT6:00 amOntario
5h 04m
1 stop
AUS1:04 pmAustin Bergstrom
Aug 16
AUS3:15 pmAustin Bergstrom
8h 37m
1 stop
ONT9:52 pmOntario

Delta flights from Ontario to Austin

Our best Delta deals on Ontario to Austin flight tickets
Delta
Jul 22
ONT2:14 pmOntario
7h 42m
1 stop
AUS11:56 pmAustin Bergstrom
Jul 26
AUS1:28 pmAustin Bergstrom
7h 52m
1 stop
ONT7:20 pmOntario
Delta
Sep 10
ONT1:15 pmOntario
5h 47m
1 stop
AUS9:02 pmAustin Bergstrom
Sep 22
AUS2:45 pmAustin Bergstrom
9h 56m
1 stop
ONT10:41 pmOntario
Delta
Jul 10
ONT10:05 pmOntario
9h 21m
1 stop
AUS9:26 amAustin Bergstrom
Jul 13
AUS7:15 pmAustin Bergstrom
6h 27m
1 stop
ONT11:42 pmOntario

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 typical price of a round-trip flight between Ontario and Austin?

What is the cheapest month to fly to Austin?

The cheapest month to fly to Austin from Ontario is in April. Flight prices, which tend to average around $258, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in April, then September is your next best option. Flight prices from Ontario to Austin during September average around $280.

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 $306. 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 $384.

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

In the afternoon is the cheapest time of day to fly from Ontario to Austin when you can find flight prices for as low as $329. Flying to Austin in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly at noon, with an average ticket price of $348. Departure times at noon 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 21 weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $319 when searching 21 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 $241 on momondo.

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

There are 1 cabin classes 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.

How have Ontario to Austin flight prices changed over time?

As of June 2025, prices for Ontario to Austin flights are approximately 38% cheaper 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

$108

Fastest flight time

2h 45m

Direct flights

Every day

Airports in Austin

1 airport
The best one-way flight to Austin from Ontario in the past 72 hours is $108. The best round-trip flight deal from Ontario to Austin found on momondo in the last 72 hours is $175.
The fastest flight from Ontario to Austin takes 2h 45m
Direct flights go from Ontario to Austin every day.
There is 1 airport near Austin: Austin Bergstrom (AUS)

  • 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 45m 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 $117Free CancellationRating
5.9
3,295 reviews
Search Frontier flights
DeltaPriceFrom $158Free CancellationRating
8.0
7,946 reviews
Search Delta flights
American AirlinesPriceFrom $215Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $231Free CancellationRating
8.0
4,287 reviews
Search Southwest flights
United AirlinesPriceFrom $312Free CancellationRating
7.4
8,790 reviews
Search United Airlines flights
  • Southwest Flights From Ontario to Austin

    Southwest is one of the most popular airlines flying from Ontario to Austin, operating 14 flights/week on average for this route. A good Southwest flight deal for Ontario to Austin starts from $231 round-trip, up to an average price of $356. Our users have rated Southwest at 8.0/10.

  • United Airlines Flights From Ontario to Austin

    United Airlines is also a popular choice for this route. United Airlines flight deals for Ontario to Austin start from as low as $312 round-trip, depending on your selected dates, with average United Airlines deals seen on momondo around $388. United Airlines operates 8 flights to Austin from Ontario in an average week. Users have rated it 7.4/10 across 8,790 reviews.


Traveling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Fredericksburg
San Marcos
Round Rock
Wimberley
Georgetown
Canyon Lake
Marble Falls
Dripping Springs
Cedar Park
Pflugerville
Horseshoe Bay
Seguin
Bastrop
Kyle
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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1 adult
Tue 6/17
Tue 6/24

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