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Cheap flights from Ontario to Los Angeles from $70

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 Los Angeles departing on 4/21. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Ontario to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Multiple Airlines Logo
11:21 am - 6:49 pm
LAX
-
ONT
7h 28m
1 stop
$143Multiple Airlines
Wed, Apr 22 - Wed, Apr 29
Multiple Airlines Logo
9:02 pm - 9:06 am
ONT
-
LAX
12h 04m
1 stop
Multiple Airlines Logo
5:11 pm - 8:24 am
LAX
-
ONT
15h 13m
1 stop
$152Multiple Airlines
Mon, Apr 13 - Wed, Apr 15
Frontier Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Frontier Logo
6:15 am - 11:55 pm
LAX
-
ONT
17h 40m
1 stop
$160Frontier
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
8:44 am - 7:32 pm
ONT
-
LAX
10h 48m
1 stop
Frontier Logo
9:40 am - 11:49 pm
LAX
-
ONT
14h 09m
1 stop
$171Frontier
Mon, May 11 - Wed, May 13
Frontier Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Frontier Logo
10:55 am - 11:55 pm
LAX
-
ONT
13h 00m
2 stops
$173Frontier
Wed, Apr 15 - Sat, Apr 18
Frontier Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Frontier Logo
12:08 pm - 7:32 pm
LAX
-
ONT
7h 24m
1 stop
$181Frontier
Sat, May 2 - Sat, May 9
Frontier Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Frontier Logo
12:08 pm - 7:32 pm
LAX
-
ONT
7h 24m
1 stop
$183Frontier
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
12:59 am - 2:59 pm
ONT
-
LAX
14h 00m
2 stops
Multiple Airlines Logo
11:21 am - 6:49 pm
LAX
-
ONT
7h 28m
1 stop
$184Multiple Airlines
Tue, Apr 21 - Wed, Apr 29
Frontier Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Frontier Logo
12:08 pm - 7:32 pm
LAX
-
ONT
7h 24m
1 stop
$185Frontier
Sat, May 2 - Sat, May 9
Frontier Logo
11:44 am - 4:15 pm
ONT
-
LAX
4h 31m
1 stop
Frontier Logo
8:58 pm - 8:04 am
LAX
-
ONT
11h 06m
1 stop
$187Frontier
Sat, May 2 - Sun, May 3

Frontier flights from Ontario to Los Angeles

Our best Frontier deals on Ontario to Los Angeles flight tickets
Frontier
Apr 15
ONT11:44 amOntario
4h 31m
1 stop
LAX4:15 pmLos Angeles
Apr 18
LAX6:15 amLos Angeles
17h 40m
1 stop
ONT11:55 pmOntario
$160
Frontier
May 11
ONT8:44 amOntario
10h 48m
1 stop
LAX7:32 pmLos Angeles
May 13
LAX9:40 amLos Angeles
14h 09m
1 stop
ONT11:49 pmOntario
$171
Frontier
Apr 15
ONT11:44 amOntario
4h 31m
1 stop
LAX4:15 pmLos Angeles
Apr 18
LAX10:55 amLos Angeles
13h 00m
2 stops
ONT11:55 pmOntario
$173

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Los Angeles 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 March 27, 2026.
Use the filters below to find and compare flights from Ontario to Los Angeles that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 4/22

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Wed 4/29

11:21 am-6:49 pm

1 stop7h 28m

$143

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 4/13

9:02 pm-9:06 am

1 stop12h 04m

Los Angeles

Wed 4/15

5:11 pm-8:24 am

1 stop15h 13m

$152

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 4/15

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Sat 4/18

6:15 am-11:55 pm

1 stop17h 40m

$160

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 5/11

8:44 am-7:32 pm

1 stop10h 48m

Los Angeles

Wed 5/13

9:40 am-11:49 pm

1 stop14h 09m

$171

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 4/15

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Sat 4/18

10:55 am-11:55 pm

2 stops13h 00m

$173
Quickest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 5/2

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Sat 5/9

12:08 pm-7:32 pm

1 stop7h 24m

$181

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 5/2

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Sat 5/9

12:08 pm-7:32 pm

1 stop7h 24m

$183

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 4/21

12:59 am-2:59 pm

2 stops14h 00m

Los Angeles

Wed 4/29

11:21 am-6:49 pm

1 stop7h 28m

$184

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 5/2

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Sat 5/9

12:08 pm-7:32 pm

1 stop7h 24m

$185

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 5/2

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles

Sun 5/3

8:58 pm-8:04 am

1 stop11h 06m

$187

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 Los Angeles from

How to get the cheapest flight ticket from Ontario to Los Angeles

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 airline that flies from Ontario to Los Angeles?

Frontier is the most popular carrier operating from Ontario to Los Angeles

When to book flights from Ontario to Los Angeles

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

Cheap Ontario to Los Angeles (ONT to LAX) flight deals and tips

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

Fastest flight time

4h 38m

Direct flights

None
The fastest flight from Ontario to Los Angeles takes 4h 38m
There are no direct flights from Ontario to Los Angeles. There are no popular flight routes from Ontario to Los Angeles.
Search flight deals

  • How far is Ontario to Los Angeles by plane?

    There are 38.0 mi between Ontario and Los Angeles. 4h 38m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Ontario Airport to Los Angeles Airport?

    Prices for flights from Ontario Airport to Los Angeles Airport are updated daily.

  • How old do you have to be to fly from Ontario Airport to Los Angeles Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Los Angeles Airport.

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

    The necessary travel and health documents for your Los Angeles Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Los Angeles?

Book flights to Los Angeles if you plan to visit one of these locations
Avalon
Laguna Beach
Big Bear Lake
Temecula
Carlsbad
Riverside
Big Bear
Malibu
Oceanside
San Clemente
Inglewood
Orange
Newport Beach
Huntington Beach
Ventura
Pasadena
Rancho Cucamonga
Downey
Buena Park
Irvine

Why use momondo?

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

Finding the right flight to Los Angeles from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Los Angeles quick and easy, saving you time and money.

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

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

How can momondo help me find flights from Ontario to Los Angeles?

Once you have performed a search for Ontario to Los Angeles 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 Los Angeles right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Los Angeles now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Los Angeles and let you know when they change.

An easier way to manage your Los Angeles trip

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