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Cheap flights from Austin to Los Angeles from $55

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 11/20. 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

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Frontier Logo
6:55 am - 11:09 amAUS-ONT
6h 14m1 stop
Frontier Logo
12:04 pm - 12:14 amONT-AUS
10h 10m1 stop
$110Frontier
Find Deal
Thu, Dec 4 - Thu, Dec 11
Frontier Logo
7:45 am - 11:10 amAUS-ONT
5h 25m1 stop
Frontier Logo
8:45 am - 8:42 pmONT-AUS
9h 57m1 stop
$116Frontier
Find Deal
Sat, Nov 15 - Tue, Nov 18
Frontier Logo
6:55 am - 11:09 amAUS-ONT
6h 14m1 stop
Frontier Logo
4:01 pm - 12:14 amONT-AUS
6h 13m1 stop
$127Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
7:14 pm - 9:57 pmAUS-ONT
4h 43m1 stop
Frontier Logo
8:00 am - 3:24 pmONT-AUS
5h 24m1 stop
$130Frontier
Find Deal
Thu, Nov 13 - Sat, Nov 15
Frontier Logo
6:45 am - 11:59 pmAUS-ONT
19h 14m1 stop
Frontier Logo
6:30 am - 11:45 amONT-AUS
27h 15m1 stop
$133Frontier
Find Deal
Thu, Jan 22 - Sun, Jan 25
Frontier Logo
6:55 am - 11:09 amAUS-ONT
6h 14m1 stop
Frontier Logo
6:15 am - 4:46 pmONT-AUS
8h 31m1 stop
$143Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
6:00 am - 11:10 amAUS-ONT
7h 10m1 stop
Frontier Logo
6:53 am - 9:42 amONT-AUS
24h 49m1 stop
$144Frontier
Find Deal
Thu, Nov 13 - Sun, Nov 16
Frontier Logo
7:14 pm - 9:57 pmAUS-ONT
4h 43m1 stop
Frontier Logo
8:45 am - 8:42 pmONT-AUS
9h 57m1 stop
$150Frontier
Find Deal
Thu, Nov 13 - Tue, Nov 18
Multiple Airlines Logo
6:45 am - 11:59 pmAUS-ONT
19h 14m1 stop
Multiple Airlines Logo
5:57 pm - 11:12 pmONT-AUS
27h 15m2 stops
$203Multiple Airlines
Find Deal
Thu, Jan 22 - Sun, Jan 25
Multiple Airlines Logo
5:13 pm - 9:17 pmAUS-ONT
6h 04m1 stop
Multiple Airlines Logo
12:13 pm - 11:59 pmONT-AUS
9h 46m1 stop
$225Multiple Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8

Frontier flights from Austin to Ontario

Our best Frontier deals on Austin to Ontario flight tickets
Frontier
Dec 4
AUS6:55 amAustin Bergstrom
6h 14m
1 stop
ONT11:09 amOntario
Dec 11
ONT12:04 pmOntario
10h 10m
1 stop
AUS12:14 amAustin Bergstrom
$110
Find similar
Frontier
Nov 15
AUS7:45 amAustin Bergstrom
5h 25m
1 stop
ONT11:10 amOntario
Nov 18
ONT8:45 amOntario
9h 57m
1 stop
AUS8:42 pmAustin Bergstrom
$116
Find similar
Frontier
Dec 4
AUS6:55 amAustin Bergstrom
6h 14m
1 stop
ONT11:09 amOntario
Dec 7
ONT4:01 pmOntario
6h 13m
1 stop
AUS12:14 amAustin Bergstrom
$127
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 October 30, 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 12/4

6:55 am-11:09 am

1 stop6h 14m

Ontario

Thu 12/11

12:04 pm-12:14 am

1 stop10h 10m

$110

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Sat 11/15

7:45 am-11:10 am

1 stop5h 25m

Ontario

Tue 11/18

8:45 am-8:42 pm

1 stop9h 57m

$116

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 12/4

6:55 am-11:09 am

1 stop6h 14m

Ontario

Sun 12/7

4:01 pm-12:14 am

1 stop6h 13m

$127

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 11/13

7:14 pm-9:57 pm

1 stop4h 43m

Ontario

Sat 11/15

8:00 am-3:24 pm

1 stop5h 24m

$130

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 1/22

6:45 am-11:59 pm

1 stop19h 14m

Ontario

Sun 1/25

6:30 am-11:45 am

1 stop27h 15m

$133

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 12/4

6:55 am-11:09 am

1 stop6h 14m

Ontario

Sun 12/7

6:15 am-4:46 pm

1 stop8h 31m

$143

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 11/13

6:00 am-11:10 am

1 stop7h 10m

Ontario

Sun 11/16

6:53 am-9:42 am

1 stop24h 49m

$144

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 11/13

7:14 pm-9:57 pm

1 stop4h 43m

Ontario

Tue 11/18

8:45 am-8:42 pm

1 stop9h 57m

$150

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Thu 1/22

6:45 am-11:59 pm

1 stop19h 14m

Ontario

Sun 1/25

5:57 pm-11:12 pm

2 stops27h 15m

$203

AustinOntario

AUS - ONT

AUSONT

Austin Bergstrom

Fri 12/5

5:13 pm-9:17 pm

1 stop6h 04m

Ontario

Mon 12/8

12:13 pm-11:59 pm

1 stop9h 46m

$225

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, August 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 $285. If you aren’t able to travel during the month of August, then book flights to Ontario from Austin during January instead. Flights to Ontario in January, while not as cheap as those in August, still average around $298.

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 $339. 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 $344 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 $281 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?

No. A direct flight is the cheapest option for a flight between Austin to Ontario.

How have Austin to Ontario flight prices changed over time?

As of October 2025, prices for Austin to Ontario flights are approximately 65% 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

$233

Fastest flight time

3h 10m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Austin in the past 72 hours is $233. The best round-trip flight deal from Austin to Ontario found on momondo in the last 72 hours is $442.
The fastest flight from Austin to Ontario takes 3h 10m
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 4h 43m.

  • 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
3,123 reviews
Search Frontier flights
American AirlinesPriceFrom $216Free CancellationRating
7.2
11,030 reviews
Search American Airlines flights
DeltaPriceFrom $221Free CancellationRating
7.9
7,993 reviews
Search Delta flights
SouthwestPriceFrom $247Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

  • Southwest Flights From Austin to Ontario

    Across 2 Southwest flights from Austin to Ontario this week, the average price was $390, with the best Southwest deals starting from $247 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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