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Ontario

$67+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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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 December 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Fri 12/263:30 pmLAX - ONT
1 stop5h 47mMultiple Airlines
Sat 12/275:16 pmONT - LAX
1 stop14h 02mMultiple Airlines
Deal found 12/15$233
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Sat 12/275:59 pmLAX - ONT
1 stop5h 22mMultiple Airlines
Wed 2/47:15 amONT - LAX
1 stop16h 16mMultiple Airlines
Deal found 12/15$257
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Wed 12/243:30 pmLAX - ONT
1 stop25h 52mMultiple Airlines
Fri 12/266:00 amONT - LAX
1 stop11h 04mMultiple Airlines
Deal found 12/16$265
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Tue 12/233:30 pmLAX - ONT
1 stop25h 45mMultiple Airlines
Thu 12/256:07 pmONT - LAX
1 stop13h 11mMultiple Airlines
Deal found 12/16$277
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/309:20 pmLAX - ONT
1 stop19h 55mMultiple Airlines
Sat 1/35:16 pmONT - LAX
1 stop19h 00mMultiple Airlines
Deal found 12/15$285
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Sat 12/273:30 pmLAX - ONT
1 stop7h 51mFrontier
Wed 2/47:15 amONT - LAX
2 stops25h 36mFrontier
Deal found 12/15$288
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/185:59 pmLAX - ONT
1 stop23h 10mMultiple Airlines
Tue 12/236:17 pmONT - LAX
1 stop13h 01mMultiple Airlines
Deal found 12/14$365
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Mon 12/153:30 pmLAX - ONT
1 stop5h 47mMultiple Airlines
Mon 12/226:00 amONT - LAX
1 stop25h 18mMultiple Airlines
Deal found 12/15$373
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Fri 12/193:30 pmLAX - ONT
1 stop5h 47mMultiple Airlines
Sun 12/216:37 pmONT - LAX
1 stop12h 41mMultiple Airlines
Deal found 12/16$406
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/185:59 pmLAX - ONT
1 stop23h 10mMultiple Airlines
Sat 12/205:16 pmONT - LAX
1 stop14h 02mMultiple Airlines
Deal found 12/14$418
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/183:30 pmLAX - ONT
1 stop5h 47mFrontier
Tue 12/236:17 pmONT - LAX
2 stops19h 05mFrontier
Deal found 12/14$427

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 December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$127
(Kiwi.com)

One-way from

$67
(Kiwi.com)
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

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 December 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

Sat 1/17

3:32 pm-7:50 pm

1 stop4h 18m

Ontario

Sun 1/18

2:34 pm-7:22 pm

1 stop4h 48m

$127

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 1/12

9:17 am-2:51 pm

1 stop5h 34m

Ontario

Mon 1/19

10:18 pm-8:22 am

1 stop10h 04m

$128

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 1/8

9:17 am-4:20 pm

1 stop7h 03m

Ontario

Sun 1/11

2:34 pm-7:21 pm

1 stop4h 47m

$130

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Fri 1/23

2:04 pm-7:53 pm

1 stop5h 49m

Ontario

Sun 1/25

2:48 pm-8:22 am

1 stop17h 34m

$130

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 1/13

2:58 pm-10:59 pm

1 stop8h 01m

Ontario

Tue 1/20

7:15 am-11:31 pm

1 stop16h 16m

$131

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Sun 1/11

9:46 pm-2:51 pm

1 stop17h 05m

Ontario

Sun 1/18

2:34 pm-7:22 pm

1 stop4h 48m

$132

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 1/6

3:25 pm-9:50 am

1 stop18h 25m

Ontario

Sat 1/10

3:21 pm-8:19 am

1 stop16h 58m

$142

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Fri 1/16

9:17 am-5:44 pm

1 stop8h 27m

Ontario

Sat 1/17

9:10 pm-8:20 am

1 stop11h 10m

$150

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 1/13

9:17 am-5:54 pm

1 stop8h 37m

Ontario

Tue 1/20

7:15 am-10:54 am

2 stops27h 39m

$156

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 2/10

9:17 am-1:52 pm

1 stop4h 35m

$67

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 21 results
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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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice 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 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 $100). Flying from Los Angeles to Ontario in August is currently the most expensive (average of $444). 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 4h 18m. 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 $100). Flying from Los Angeles to Ontario in August is currently the most expensive (average of $444). 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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