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Cheap flights from Ontario to Los Angeles from $87

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 10/30. 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

Find the cheapest flights from Ontario to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:56 pm - 12:10 amONT  Ontario-LAX Los Angeles
28h 14m1 stop Denver Intl
Frontier Logo
2:01 pm - 11:47 pmLAX  Los Angeles-ONT Ontario
9h 46m1 stop Denver Intl
$118Frontier
Tue, Sep 8 - Tue, Sep 15
Frontier Logo
11:45 am - 2:39 pmONT  Ontario-LAX Los Angeles
26h 54m1 stop Denver Intl
Frontier Logo
2:01 pm - 11:47 pmLAX  Los Angeles-ONT Ontario
9h 46m1 stop Denver Intl
$120Frontier
Wed, Sep 16 - Wed, Oct 7
Frontier Logo
12:07 pm - 10:22 pmONT  Ontario-LAX Los Angeles
10h 15m1 stop San Francisco
Frontier Logo
6:05 am - 11:47 pmLAX  Los Angeles-ONT Ontario
17h 42m1 stop Denver Intl
$128Frontier
Mon, Sep 21 - Sat, Oct 3
Frontier Logo
12:07 pm - 10:22 pmONT  Ontario-LAX Los Angeles
10h 15m1 stop San Francisco
Frontier Logo
2:01 pm - 11:47 pmLAX  Los Angeles-ONT Ontario
9h 46m1 stop Denver Intl
$131Frontier
Mon, Sep 21 - Sat, Oct 3
Frontier Logo
11:45 am - 12:10 amONT  Ontario-LAX Los Angeles
12h 25m1 stop Denver Intl
Frontier Logo
2:01 pm - 11:47 pmLAX  Los Angeles-ONT Ontario
9h 46m1 stop Denver Intl
$138Frontier
Tue, Sep 15 - Tue, Sep 22
Frontier Logo
12:07 pm - 10:37 amONT  Ontario-LAX Los Angeles
22h 30m1 stop San Francisco
Frontier Logo
10:04 pm - 9:09 amLAX  Los Angeles-ONT Ontario
11h 05m1 stop Las Vegas Harry Reid Intl
$145Frontier
Fri, Sep 11 - Fri, Sep 18
Frontier Logo
6:15 am - 12:10 amONT  Ontario-LAX Los Angeles
17h 55m1 stop Denver Intl
Frontier Logo
10:04 pm - 9:09 amLAX  Los Angeles-ONT Ontario
11h 05m1 stop Las Vegas Harry Reid Intl
$146Frontier
Mon, Sep 14 - Mon, Sep 21
Frontier Logo
3:40 pm - 11:50 amONT  Ontario-LAX Los Angeles
20h 10m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl
Frontier Logo
2:01 pm - 11:47 pmLAX  Los Angeles-ONT Ontario
9h 46m1 stop Denver Intl
$152Frontier
Tue, Sep 8 - Tue, Sep 15
Frontier Logo
12:07 pm - 10:37 amONT  Ontario-LAX Los Angeles
22h 30m1 stop San Francisco
Frontier Logo
10:04 pm - 9:09 amLAX  Los Angeles-ONT Ontario
11h 05m1 stop Las Vegas Harry Reid Intl
$154Frontier
Fri, Sep 11 - Fri, Sep 18
Frontier Logo
12:07 pm - 10:37 amONT  Ontario-LAX Los Angeles
22h 30m1 stop San Francisco
Frontier Logo
8:44 am - 7:36 pmLAX  Los Angeles-ONT Ontario
10h 52m1 stop San Francisco
$157Frontier
Thu, Sep 10 - Mon, Sep 14

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Frontier flights from Ontario to Los Angeles

Our best Frontier deals on Ontario to Los Angeles flight tickets
Frontier
Sep 8
ONT7:56 pmOntario
28h 14m
1 stop
LAX12:10 amLos Angeles
Sep 15
LAX2:01 pmLos Angeles
9h 46m
1 stop
ONT11:47 pmOntario
$118
Frontier
Sep 16
ONT11:45 amOntario
26h 54m
1 stop
LAX2:39 pmLos Angeles
Oct 7
LAX2:01 pmLos Angeles
9h 46m
1 stop
ONT11:47 pmOntario
$120
Frontier
Sep 21
ONT12:07 pmOntario
10h 15m
1 stop
LAX10:22 pmLos Angeles
Oct 3
LAX6:05 amLos Angeles
17h 42m
1 stop
ONT11:47 pmOntario
$128

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 August 18, 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 Ontario - LAX Los Angeles

ONTLAX

Ontario

Tue 9/8

7:56 pm-12:10 am

1 stop28h 14m

Los Angeles

Tue 9/15

2:01 pm-11:47 pm

1 stop9h 46m

$118

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Wed 9/16

11:45 am-2:39 pm

1 stop26h 54m

Los Angeles

Wed 10/7

2:01 pm-11:47 pm

1 stop9h 46m

$120

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Mon 9/21

12:07 pm-10:22 pm

1 stop10h 15m

Los Angeles

Sat 10/3

6:05 am-11:47 pm

1 stop17h 42m

$128
Quickest round-trip

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Mon 9/21

12:07 pm-10:22 pm

1 stop10h 15m

Los Angeles

Sat 10/3

2:01 pm-11:47 pm

1 stop9h 46m

$131

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Tue 9/15

11:45 am-12:10 am

1 stop12h 25m

Los Angeles

Tue 9/22

2:01 pm-11:47 pm

1 stop9h 46m

$138

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Fri 9/11

12:07 pm-10:37 am

1 stop22h 30m

Los Angeles

Fri 9/18

10:04 pm-9:09 am

1 stop11h 05m

$145

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Mon 9/14

6:15 am-12:10 am

1 stop17h 55m

Los Angeles

Mon 9/21

10:04 pm-9:09 am

1 stop11h 05m

$146

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Tue 9/8

3:40 pm-11:50 am

2 stops20h 10m

Los Angeles

Tue 9/15

2:01 pm-11:47 pm

1 stop9h 46m

$152

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Fri 9/11

12:07 pm-10:37 am

1 stop22h 30m

Los Angeles

Fri 9/18

10:04 pm-9:09 am

1 stop11h 05m

$154

OntarioLos Angeles

ONT Ontario - LAX Los Angeles

ONTLAX

Ontario

Thu 9/10

12:07 pm-10:37 am

1 stop22h 30m

Los Angeles

Mon 9/14

8:44 am-7:36 pm

1 stop10h 52m

$157

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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

Can stopping save me money on Ontario to Los Angeles flights?

You could potentially save up to 23% on your flight if you consider stops on a Ontario to Los Angeles flight.

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

Best Price Found

$87

Fastest flight time

4h 33m

Direct flights

None
The best one-way flight to Los Angeles from Ontario in the past 72 hours is $87. The best round-trip flight deal from Ontario to Los Angeles found on momondo in the last 72 hours is $118.
The fastest flight from Ontario to Los Angeles takes 4h 33m
There are no direct flights from Ontario to Los Angeles. There are no popular flight routes from Ontario to Los Angeles.
Search flight deals

Frequently asked questions about flying from Ontario to Los Angeles

  • How far is Ontario to Los Angeles by plane?

    There are 38.0 mi between Ontario and Los Angeles. 4h 33m 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
Carlsbad
Temecula
Riverside
Oceanside
Inglewood
Big Bear
San Clemente
Newport Beach
Pasadena
Malibu
Orange
Ventura
Huntington Beach
Buena Park
West Hollywood
Irvine
Downey

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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