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$83+ Cheap flights from Ontario to Los Angeles (ONT - LAX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Apr 16 — Apr 231
Thu 4/16
Thu 4/23
1 adult, Economy
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1. Tell us where you want to go

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Cheap flight deals from Ontario to Los Angeles

Cheapest flights from Ontario to Los Angeles
Explore the most affordable flight options available from Ontario to Los Angeles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 17, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1411:44 am
ONT
-
LAX
1 stop4h 31m
Frontier
Tue 4/215:11 pm
LAX
-
ONT
1 stop17h 33m
Frontier
Deal found 3/17$158
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:02 pm
ONT
-
LAX
1 stop12h 04m
Multiple Airlines
Wed 4/155:11 pm
LAX
-
ONT
1 stop15h 13m
Multiple Airlines
Deal found 3/16$161
This Kiwi.com deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:59 am
ONT
-
LAX
1 stop22h 15m
Frontier
Sat 5/912:08 pm
LAX
-
ONT
1 stop7h 24m
Frontier
Deal found 3/14$170
This Kiwi.com deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:02 pm
ONT
-
LAX
1 stop19h 13m
Frontier
Mon 4/201:19 pm
LAX
-
ONT
1 stop6h 45m
Frontier
Deal found 3/16$172
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/51:50 pm
ONT
-
LAX
1 stop19h 13m
Multiple Airlines
Tue 5/1911:21 am
LAX
-
ONT
1 stop8h 11m
Multiple Airlines
Deal found 3/15$178
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1210:35 pm
ONT
-
LAX
1 stop10h 31m
Multiple Airlines
Sun 4/198:58 pm
LAX
-
ONT
1 stop13h 16m
Multiple Airlines
Deal found 3/15$188
This Kiwi.com deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1210:35 pm
ONT
-
LAX
1 stop8h 46m
Frontier
Sun 4/198:58 pm
LAX
-
ONT
1 stop13h 16m
Frontier
Deal found 3/13$192
This Kiwi.com deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:39 pm
ONT
-
LAX
1 stop16h 24m
Frontier
Tue 5/1910:20 pm
LAX
-
ONT
2 stops40h 49m
Frontier
Deal found 3/15$197

Find flight deals from Ontario to Los Angeles

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Los Angeles (LAX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$143
(Kiwi.com)

One-way from

$83
(Kiwi.com)
Provider with most accurate pricing for Ontario-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Los Angeles Los Angeles flights.
Search Deals
From Ontario to Los Angeles Los Angeles
Search Deals
One-way flight from Ontario to Los Angeles Los Angeles
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Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated March 17, 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

Tue 4/14

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles Los Angeles

Tue 4/21

5:11 pm-10:44 am

1 stop17h 33m

$158

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 5/1

12:59 am-11:14 pm

1 stop22h 15m

Los Angeles Los Angeles

Sat 5/9

12:08 pm-7:32 pm

1 stop7h 24m

$170

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 4/20

11:44 am-5:14 pm

1 stop5h 30m

Los Angeles Los Angeles

Tue 4/21

5:11 pm-10:44 am

1 stop17h 33m

$172

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 5/5

1:50 pm-9:03 am

1 stop19h 13m

Los Angeles Los Angeles

Tue 5/19

11:21 am-7:32 pm

1 stop8h 11m

$178

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 4/12

10:35 pm-7:21 am

1 stop8h 46m

Los Angeles Los Angeles

Sun 4/19

8:58 pm-10:14 am

1 stop13h 16m

$192

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 5/5

4:39 pm-9:03 am

1 stop16h 24m

Los Angeles Los Angeles

Tue 5/19

10:20 pm-3:09 pm

2 stops40h 49m

$197

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 4/13

9:02 pm-4:15 pm

1 stop19h 13m

Los Angeles Los Angeles

Mon 4/20

10:59 pm-11:55 pm

2 stops24h 56m

$206
Quickest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 4/21

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles Los Angeles

Wed 4/22

5:11 pm-7:31 am

2 stops14h 20m

$207

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 4/13

9:02 pm-9:06 am

1 stop12h 04m

Los Angeles Los Angeles

Wed 4/15

5:11 pm-7:31 am

2 stops14h 20m

$221
Cheapest one-way

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 5/31

3:30 pm-7:32 pm

1 stop28h 02m

$96

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Ontario to Los Angeles

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Los Angeles in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Los Angeles flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Los Angeles flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Los Angeles flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Los Angeles flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Los Angeles flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Los Angeles

Have a flexible travel schedule? Discover the best time to fly to Los Angeles from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Los Angeles

How often are flights from Ontario to Los Angeles delayed?

About 29% of weekly flights between Ontario and Los Angeles have experienced delays in the past year, with the average delay time being 74 minutes.

What is the most punctual flight time for Ontario to Los Angeles flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ontario to Los Angeles flights?

Over the last year, American Airlines have had the lowest number of delays on this route, with just 37% of flights being delayed.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Los Angeles. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Los Angeles?

    Departing from Ontario to Los Angeles will take you 4h 31m. The distance between Ontario and Los Angeles is about 47 mi.

  • Can I find deals for flights from Ontario to Los Angeles that include hotel bookings?

    Yes. In addition to deals on Ontario to Los Angeles flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Los Angeles?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Los Angeles.

  • Can I find deals for business class flights from Ontario to Los Angeles?

    Yes. Cheapflights offers flight deals from Ontario to Los Angeles by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Los Angeles?

Book flights to Los Angeles if you plan to visit one of these locations
Downey
Oceanside
Avalon
Universal City
Inglewood
El Segundo
Torrance
Hesperia
West Hollywood
Carson
Lancaster
Garden Grove
Redondo Beach
Oxnard
Lake Elsinore
Buena Park
Fountain Valley
Glendale
Montebello
Moreno Valley

Browse thousands of different options on Cheapflights for your next trip

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