HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$57+ 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 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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.

Find 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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Thu 12/113:30 pmLAX - ONT
1 stop5h 47mFrontier
Mon 12/156:15 amONT - LAX
1 stop13h 50mFrontier
Deal found 10/29$110
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Wed 12/243:30 pmLAX - ONT
1 stop5h 47mFrontier
Wed 12/316:00 amONT - LAX
1 stop6h 16mFrontier
Deal found 10/30$127
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/33:30 pmLAX - ONT
1 stop5h 47mFrontier
Fri 12/510:12 pmONT - LAX
1 stop25h 29mFrontier
Deal found 10/29$133
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/273:18 pmLAX - ONT
1 stop5h 48mFrontier
Thu 12/42:59 pmONT - LAX
1 stop5h 06mFrontier
Deal found 10/28$139
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 11/283:18 pmLAX - ONT
1 stop5h 48mFrontier
Fri 12/510:12 pmONT - LAX
1 stop25h 29mFrontier
Deal found 10/29$151

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$110
(Kiwi.com)

One-way from

$57
(Kiwi.com)

Popular in

November

Cheapest in

September

Average price

$366
Provider with most accurate pricing for Los Angeles-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Ontario flights.
Search Deals
From Los Angeles to Ontario
Search Deals
One-way flight from Los Angeles to Ontario
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 2025.
Use the filters below to find and compare flights from Los Angeles to Ontario that are best for you.

Fly from

Los Angeles

Fly to

Ontario

Route

Depart

Return

Price

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 12/11

3:30 pm-9:17 pm

1 stop5h 47m

Ontario

Mon 12/15

6:15 am-8:05 pm

1 stop13h 50m

$110

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/24

3:30 pm-9:17 pm

1 stop5h 47m

Ontario

Wed 12/31

6:00 am-12:16 pm

1 stop6h 16m

$127

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/3

3:30 pm-9:17 pm

1 stop5h 47m

Ontario

Fri 12/5

10:12 pm-11:41 pm

1 stop25h 29m

$133

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 11/27

3:18 pm-9:06 pm

1 stop5h 48m

Ontario

Thu 12/4

2:59 pm-8:05 pm

1 stop5h 06m

$139

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Fri 11/28

3:18 pm-9:06 pm

1 stop5h 48m

Ontario

Fri 12/5

10:12 pm-11:41 pm

1 stop25h 29m

$151

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 11/26

5:33 pm-2:26 pm

1 stop20h 53m

Ontario

Wed 12/3

6:15 am-8:05 pm

1 stop13h 50m

$153

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/24

3:30 pm-5:22 pm

1 stop25h 52m

$57

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 12/4

3:30 pm-9:17 pm

1 stop5h 47m

$68

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/3

3:30 pm-9:17 pm

1 stop5h 47m

$68

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Sun 12/14

3:30 pm-2:04 pm

1 stop22h 34m

$68

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 15 results
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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Los Angeles-Ontario flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

What is the cheapest month to book a flight from Los Angeles to Ontario?

Currently, March is the cheapest month in which you can book a flight from Los Angeles to Ontario (average of $102). Flying from Los Angeles to Ontario in May is currently the most expensive (average of $341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 5h 47m. 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.

  • What is the cheapest month to book a flight from Los Angeles to Ontario?

    Currently, March is the cheapest month in which you can book a flight from Los Angeles to Ontario (average of $102). Flying from Los Angeles to Ontario in May is currently the most expensive (average of $341). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 Los Angeles flights
Los Angeles to San Francisco flights
San Francisco to Las Vegas flights
San Francisco to Ontario flights
San Francisco to Santa Ana flights
Los Angeles to Las Vegas flights
Santa Ana to San Francisco flights
San Jose to Los Angeles flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
Ontario to San Francisco flights
Los Angeles to Sacramento flights
Ontario to Las Vegas flights
Santa Ana to Las Vegas flights
Los Angeles to San Jose flights
Sacramento to Los Angeles flights
Burbank to San Francisco flights
Oakland to Las Vegas flights
Sacramento to Las Vegas flights
San Francisco to San Diego flights
San Diego to San Francisco flights
San Diego to Las Vegas flights
San Francisco to Burbank flights
San Jose to Ontario flights
San Francisco to Palm Springs flights
Las Vegas to Los Angeles flights
San Jose to Santa Ana flights
Ontario to Sacramento flights
Reno to Las Vegas flights
Sacramento to Ontario flights
Ontario to San Jose flights
Fresno to Las Vegas flights
San Jose to San Diego flights
Las Vegas to San Francisco flights
San Diego to San Jose flights
Las Vegas to Burbank flights
Los Angeles to Reno flights
Stockton to Las Vegas flights
Sacramento to Santa Ana flights
Santa Ana to Sacramento flights
Las Vegas to Santa Ana flights
Santa Ana to San Jose flights
Sacramento to San Diego flights
Las Vegas to Ontario flights
Palm Springs to San Francisco flights
San Francisco to Long Beach flights
Santa Ana to Oakland flights
Oakland to San Diego flights
Las Vegas to San Diego flights
Reno 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.