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Cheap flights from Austin to Los Angeles from $76

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Austin to Los Angeles departing on 12/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Frontier Logo
6:00 am - 9:35 amAUS-ONT
5h 35m1 stop
Frontier Logo
6:53 am - 12:33 amONT-AUS
15h 40m1 stop
$143Frontier
Find Deal
Thu, Oct 9 - Wed, Oct 15
Frontier Logo
6:00 am - 11:10 amAUS-ONT
7h 10m1 stop
Frontier Logo
12:05 pm - 12:32 amONT-AUS
10h 27m1 stop
$144Frontier
Find Deal
Thu, Oct 30 - Thu, Nov 6
United Airlines Logo
9:00 am - 3:02 pmAUS-ONT
8h 02m1 stop
United Airlines Logo
6:00 am - 1:08 pmONT-AUS
5h 08m1 stop
$151United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Frontier Logo
6:00 am - 9:35 amAUS-ONT
5h 35m1 stop
Frontier Logo
11:53 am - 12:33 amONT-AUS
10h 40m1 stop
$153Frontier
Find Deal
Sun, Oct 19 - Fri, Oct 24
United Airlines Logo
5:15 am - 12:13 pmAUS-ONT
8h 58m2 stops
United Airlines Logo
6:00 am - 1:08 pmONT-AUS
5h 08m1 stop
$156United Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
American Airlines Logo
6:15 am - 9:19 amAUS-ONT
5h 04m1 stop
American Airlines Logo
12:55 pm - 7:37 pmONT-AUS
4h 42m1 stop
$159American Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
Frontier Logo
9:23 pm - 7:54 pmAUS-ONT
24h 31m1 stop
Frontier Logo
8:59 pm - 8:58 pmONT-AUS
21h 59m1 stop
$162Frontier
Find Deal
Fri, Sep 26 - Mon, Sep 29
American Airlines Logo
5:01 am - 9:54 amAUS-ONT
6h 53m1 stop
American Airlines Logo
4:47 pm - 11:59 pmONT-AUS
5h 12m1 stop
$217American Airlines
Find Deal
Tue, Dec 16 - Tue, Dec 30
Delta Logo
8:10 am - 12:14 pmAUS-ONT
6h 04m1 stop
Delta Logo
6:00 am - 1:04 pmONT-AUS
5h 04m1 stop
$237Delta
Find Deal
Sat, Oct 18 - Tue, Oct 28
Southwest Logo
5:35 am - 9:35 amAUS-ONT
6h 00m1 stop
Southwest Logo
11:15 am - 7:50 pmONT-AUS
6h 35m1 stop
$244Southwest
Find Deal
Tue, Dec 2 - Fri, Dec 5

American Airlines flights from Austin to Ontario

Our best American Airlines deals on Austin to Ontario flight tickets
American Airlines
Oct 29
AUS6:15 amAustin Bergstrom
5h 04m
1 stop
ONT9:19 amOntario
Nov 5
ONT12:55 pmOntario
4h 42m
1 stop
AUS7:37 pmAustin Bergstrom
$159
Find similar
American Airlines
Dec 16
AUS5:01 amAustin Bergstrom
6h 53m
1 stop
ONT9:54 amOntario
Dec 30
ONT4:47 pmOntario
5h 12m
1 stop
AUS11:59 pmAustin Bergstrom
$217
Find similar

Frontier flights from Austin to Ontario

Our best Frontier deals on Austin to Ontario flight tickets
Frontier
Oct 9
AUS6:00 amAustin Bergstrom
5h 35m
1 stop
ONT9:35 amOntario
Oct 15
ONT6:53 amOntario
15h 40m
1 stop
AUS12:33 amAustin Bergstrom
$143
Find similar
Frontier
Oct 30
AUS6:00 amAustin Bergstrom
7h 10m
1 stop
ONT11:10 amOntario
Nov 6
ONT12:05 pmOntario
10h 27m
1 stop
AUS12:32 amAustin Bergstrom
$144
Find similar
Frontier
Oct 19
AUS6:00 amAustin Bergstrom
5h 35m
1 stop
ONT9:35 amOntario
Oct 24
ONT11:53 amOntario
10h 40m
1 stop
AUS12:33 amAustin Bergstrom
$153
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Austin to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 10/9

6:00 am-9:35 am

1 stop5h 35m

Ontario

Wed 10/15

6:53 am-12:33 am

1 stop15h 40m

$143

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 10/30

6:00 am-11:10 am

1 stop7h 10m

Ontario

Thu 11/6

12:05 pm-12:32 am

1 stop10h 27m

$144

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Tue 10/7

9:00 am-3:02 pm

1 stop8h 02m

Ontario

Tue 10/14

6:00 am-1:08 pm

1 stop5h 08m

$151

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Sun 10/19

6:00 am-9:35 am

1 stop5h 35m

Ontario

Fri 10/24

11:53 am-12:33 am

1 stop10h 40m

$153

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Tue 10/7

5:15 am-12:13 pm

2 stops8h 58m

Ontario

Tue 10/14

6:00 am-1:08 pm

1 stop5h 08m

$156

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Wed 10/29

6:15 am-9:19 am

1 stop5h 04m

Ontario

Wed 11/5

12:55 pm-7:37 pm

1 stop4h 42m

$159

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Fri 9/26

9:23 pm-7:54 pm

1 stop24h 31m

Ontario

Mon 9/29

8:59 pm-8:58 pm

1 stop21h 59m

$162

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Tue 12/16

5:01 am-9:54 am

1 stop6h 53m

Ontario

Tue 12/30

4:47 pm-11:59 pm

1 stop5h 12m

$217

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Sat 10/18

8:10 am-12:14 pm

1 stop6h 04m

Ontario

Tue 10/28

6:00 am-1:04 pm

1 stop5h 04m

$237

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Tue 12/2

5:35 am-9:35 am

1 stop6h 00m

Ontario

Fri 12/5

11:15 am-7:50 pm

1 stop6h 35m

$244

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Austin to Ontario

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 Ontario?

In general, January is the cheapest month to fly from Austin to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $283. If you aren’t able to travel during the month of January, then book flights to Ontario from Austin during November instead. Flights to Ontario in November, while not as cheap as those in January, still average around $284.

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

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $309. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Austin to Ontario for around $706.

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

In the morning is the cheapest time of day to fly from Austin to Ontario when you can find flight prices for as low as $327. Flying to Ontario in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $411 on average. Flights to Ontario from Austin at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Austin Bergstrom to Ontario flight route?

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

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

You are more likely to see cheaper flights to Ontario from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $334 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Austin for as low as $241 on momondo.

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

There is only 1 cabin class available to choose from on Austin Bergstrom to Ontario 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 Austin to Ontario flights?

You could potentially save up to 39% on your flight if you consider stops on a Austin to Ontario flight.

How have Austin to Ontario flight prices changed over time?

As of September 2025, prices for Austin to Ontario flights are approximately 134% more expensive when compared to flights at the same time last year.

When to book flights from Austin to Ontario

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

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

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

Best Price Found

$148

Fastest flight time

3h 00m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Austin in the past 72 hours is $148. The best round-trip flight deal from Austin to Ontario found on momondo in the last 72 hours is $513.
The fastest flight from Austin to Ontario takes 3h 00m
Direct flights go from Austin to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)
Search flight deals

  • How far is Austin Bergstrom to Ontario by plane?

    There are 1190.2 mi between Austin Bergstrom and Ontario. A reasonable flight in good conditions will take 5h 04m.

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

    Prices for flights from Austin Bergstrom Airport to Ontario Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Austin Bergstrom Airport to Ontario Airport.

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

    The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from Austin to Ontario

Compare and see reviews for airlines that fly from Austin to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $108Free CancellationRating
5.8
3,174 reviews
Search Frontier flights
American AirlinesPriceFrom $197Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $217Free CancellationRating
7.9
7,957 reviews
Search Delta flights
SouthwestPriceFrom $231Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Southwest Flights From Austin to Ontario

    Across 5 Southwest flights from Austin to Ontario this week, the average price was $380, with the best Southwest deals starting from $231 round-trip. 4,242 users have rated Southwest on momondo, with an average score of 8.0/10.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Austin to Ontario. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Ontario from Austin on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Austin.

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

Of course. momondo tracks the price of Austin to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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