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Ontario

$55+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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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 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Wed 11/123:27 pmLAX - ONT
1 stop17h 43mFrontier
Wed 11/198:00 amONT - LAX
1 stop11h 53mFrontier
Deal found 10/14$105
This Kiwi.com deal was found by Cheapflights users on 10/16. 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.
Thu 11/136:10 amLAX - ONT
1 stop6h 41mMultiple Airlines
Thu 11/206:30 amONT - LAX
1 stop6h 23mMultiple Airlines
Deal found 10/16$108
This Kiwi.com deal was found by Cheapflights users on 10/16. 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.
Thu 12/113:30 pmLAX - ONT
1 stop5h 47mFrontier
Mon 12/156:15 amONT - LAX
1 stop13h 50mFrontier
Deal found 10/16$110
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Wed 11/122:48 pmLAX - ONT
1 stop6h 41mMultiple Airlines
Wed 11/198:00 amONT - LAX
1 stop8h 58mMultiple Airlines
Deal found 10/15$115
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 11/66:10 amLAX - ONT
1 stop6h 41mMultiple Airlines
Sat 11/81:37 pmONT - LAX
1 stop6h 16mMultiple Airlines
Deal found 10/15$117
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Thu 11/138:40 pmLAX - ONT
1 stop10h 37mFrontier
Wed 11/1912:58 amONT - LAX
1 stop13h 05mFrontier
Deal found 10/14$122
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 12/43:35 pmLAX - ONT
1 stop5h 42mFrontier
Sun 12/74:02 pmONT - LAX
1 stop15h 40mFrontier
Deal found 10/15$133
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 11/610:23 amLAX - ONT
2 stops11h 34mFrontier
Sat 11/86:53 amONT - LAX
1 stop6h 25mFrontier
Deal found 10/15$154

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 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$105
(Kiwi.com)

One-way from

$55
(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 16, 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 11/13

6:10 am-12:51 pm

1 stop6h 41m

Ontario

Thu 11/20

6:30 am-12:53 pm

1 stop6h 23m

$108

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 11/12

2:48 pm-9:29 pm

1 stop6h 41m

Ontario

Wed 11/19

8:00 am-4:58 pm

1 stop8h 58m

$115

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 11/13

8:40 pm-7:17 am

1 stop10h 37m

Ontario

Wed 11/19

12:58 am-2:03 pm

1 stop13h 05m

$122

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 12/4

3:35 pm-9:17 pm

1 stop5h 42m

Ontario

Sun 12/7

4:02 pm-7:42 am

1 stop15h 40m

$133

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 11/12

3:27 pm-8:42 pm

1 stop5h 15m

Ontario

Wed 11/19

8:45 am-8:17 am

2 stops23h 32m

$145

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/24

1:11 pm-5:15 pm

1 stop4h 04m

Ontario

Mon 12/29

10:12 pm-10:59 pm

1 stop24h 47m

$159

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 11/17

6:10 am-9:57 pm

1 stop15h 47m

$55

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 11/27

3:18 pm-9:06 pm

1 stop5h 48m

$56

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 11/26

3:18 pm-2:26 pm

1 stop23h 08m

$57

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 18 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*3 stars
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 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

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

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