HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$63+ Cheap flights from Los Angeles to Ontario (LAX - ONT)

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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Jun 2 — Jun 91
Tue 6/2
Tue 6/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Los Angeles to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Los Angeles to Ontario

Cheapest flights from Los Angeles to Ontario
Explore the most affordable flight options available from Los Angeles to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Wed 5/274:31 pm
LAX
-
ONT
1 stop7h 18m
Frontier
Wed 6/31:39 pm
ONT
-
LAX
1 stop5h 53m
Frontier
Deal found 4/29$124
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 5/2612:08 pm
LAX
-
ONT
1 stop19h 56m
Frontier
Tue 6/24:39 pm
ONT
-
LAX
1 stop16h 24m
Frontier
Deal found 4/28$126
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 5/267:22 pm
LAX
-
ONT
1 stop17h 32m
Frontier
Mon 6/13:30 pm
ONT
-
LAX
1 stop17h 33m
Frontier
Deal found 4/29$136
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Wed 5/2012:08 pm
LAX
-
ONT
1 stop19h 56m
Frontier
Mon 5/253:30 pm
ONT
-
LAX
2 stops29h 40m
Frontier
Deal found 4/28$142
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Thu 6/48:27 pm
LAX
-
ONT
1 stop23h 05m
Frontier
Tue 6/303:34 pm
ONT
-
LAX
1 stop17h 51m
Frontier
Deal found 4/28$144
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/258:27 pm
LAX
-
ONT
1 stop11h 37m
Frontier
Sat 6/68:17 pm
ONT
-
LAX
1 stop20h 42m
Frontier
Deal found 4/30$148
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
Wed 5/209:40 am
LAX
-
ONT
1 stop14h 09m
Multiple Airlines
Mon 5/253:30 pm
ONT
-
LAX
1 stop19h 37m
Multiple Airlines
Deal found 4/28$157
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Thu 5/283:15 pm
LAX
-
ONT
1 stop23h 20m
Frontier
Thu 6/411:51 am
ONT
-
LAX
1 stop7h 41m
Frontier
Deal found 4/30$160
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Wed 6/1712:02 pm
LAX
-
ONT
1 stop7h 49m
Multiple Airlines
Wed 6/241:33 pm
ONT
-
LAX
1 stop25h 34m
Multiple Airlines
Deal found 4/29$163

Find flight deals from Los Angeles to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Los Angeles (LAX) to Ontario (ONT). 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 May 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$124
(Kiwi.com)

One-way from

$63
(Kiwi.com)
Provider with most accurate pricing for Los Angeles Los Angeles-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles Los Angeles-Ontario flights.
Search Deals
From Los Angeles Los Angeles to Ontario
Search Deals
One-way flight from Los Angeles Los Angeles to Ontario
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Los Angeles 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, Cheapflights users made 2,558,603 searches. Data last updated May 3, 2026.
Use the filters below to find and compare flights from Los Angeles to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Tue 5/26

6:30 am-3:44 pm

2 stops9h 14m

Ontario

Tue 6/2

1:39 pm-7:32 pm

1 stop5h 53m

$169

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Fri 6/5

5:54 pm-11:06 am

1 stop17h 12m

Ontario

Mon 6/8

8:17 pm-5:07 pm

1 stop20h 50m

$176

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Thu 6/4

8:27 pm-11:06 am

2 stops14h 39m

Ontario

Tue 6/30

3:34 pm-9:25 am

1 stop17h 51m

$212

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Wed 6/17

12:02 pm-7:51 pm

1 stop7h 49m

Ontario

Wed 6/24

6:00 am-7:00 pm

2 stops13h 00m

$251

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Fri 6/5

12:02 pm-3:09 pm

1 stop27h 07m

Ontario

Mon 6/29

8:36 pm-5:07 pm

1 stop20h 31m

$262

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Sat 5/30

9:48 am-11:49 pm

2 stops14h 01m

Ontario

Mon 6/1

3:30 pm-3:36 pm

2 stops48h 06m

$265

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Mon 6/29

6:02 pm-12:48 pm

1 stop18h 46m

Ontario

Fri 7/17

8:39 pm-9:24 am

2 stops12h 45m

$267

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Fri 6/5

5:54 pm-3:09 pm

2 stops21h 15m

Ontario

Mon 6/29

8:36 pm-5:07 pm

1 stop20h 31m

$279

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Sun 5/31

9:48 am-10:05 am

2 stops24h 17m

Ontario

Sun 6/7

8:17 pm-2:20 pm

1 stop18h 03m

$284

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles Los Angeles

Thu 6/25

6:02 pm-10:05 am

2 stops16h 03m

Ontario

Tue 6/30

6:00 am-12:11 am

1 stop18h 11m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Los Angeles to Ontario

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 Los Angeles to Ontario in May.
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 Los Angeles-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Los Angeles-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Los Angeles-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Los Angeles-Ontario 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 Los Angeles-Ontario 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 Los Angeles to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Los Angeles 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 Los Angeles to Ontario

How often are flights from Los Angeles to Ontario delayed?

About 22% of weekly flights between Los Angeles and Ontario have experienced delays in the past year, with the average delay time being 67 minutes.

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

Historically, flights departing in the evening 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?

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

Related info for your journey

Find useful and relevant information for your journey from Los Angeles to Ontario. 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 Los Angeles to Ontario?

    Frontier can get you from Los Angeles to Ontario in just under 11h 37m. Your travel time can differ by up to . Los Angeles and Ontario are separated by a distance of 47 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Los Angeles to Ontario 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Los Angeles to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Las Vegas flights
Los Angeles to Las Vegas flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
San Francisco to Santa Ana flights
Santa Ana to Las Vegas flights
Burbank to Las Vegas flights
San Jose to Los Angeles flights
Ontario to San Francisco flights
San Jose to Las Vegas flights
San Francisco to San Diego flights
Santa Ana to San Francisco flights
San Diego to Las Vegas flights
San Francisco to Ontario flights
Ontario to Las Vegas flights
Los Angeles to San Jose flights
Sacramento to Las Vegas flights
San Francisco to Burbank flights
San Diego to San Francisco flights
San Jose to San Diego flights
Los Angeles to Sacramento flights
San Jose to Ontario flights
Oakland to Las Vegas flights
San Francisco to Palm Springs flights
Sacramento to Los Angeles flights
San Jose to Santa Ana flights
Las Vegas to San Francisco flights
Ontario to San Jose flights
Burbank to San Francisco flights
Las Vegas to Los Angeles flights
Los Angeles to Reno flights
Fresno to Las Vegas flights
Stockton to Las Vegas flights
Long Beach to Las Vegas flights
Sacramento to San Diego flights
San Diego to San Jose flights
Los Angeles to Oakland flights
Sacramento to Ontario flights
Burbank to San Jose flights
Ontario to Sacramento flights
Las Vegas to San Diego flights
Reno to Las Vegas flights
Santa Rosa to Las Vegas flights
Santa Ana to San Jose flights
Las Vegas to Ontario flights
Las Vegas to Santa Ana flights
Oakland to San Diego flights
Las Vegas to Burbank flights
Ontario to Reno flights
Santa Rosa to Los Angeles flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.