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$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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
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 November 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/11. 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 12/97:35 pmLAX - ONT
2 stops25h 42mFrontier
Tue 12/166:15 amONT - LAX
1 stop13h 50mFrontier
Deal found 11/11$110
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 11/279:05 amLAX - ONT
1 stop5h 21mMultiple Airlines
Fri 11/285:06 pmONT - LAX
1 stop3h 53mMultiple Airlines
Deal found 11/12$129
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 11/253:18 pmLAX - ONT
1 stop5h 48mFrontier
Tue 12/26:15 amONT - LAX
1 stop13h 50mFrontier
Deal found 11/12$130
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 12/63:30 pmLAX - ONT
1 stop5h 47mFrontier
Mon 12/810:12 pmONT - LAX
1 stop25h 29mFrontier
Deal found 11/12$131
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 11/239:54 pmLAX - ONT
1 stop23h 12mMultiple Airlines
Tue 11/255:06 pmONT - LAX
1 stop3h 53mMultiple Airlines
Deal found 11/11$134
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 12/86:21 pmLAX - ONT
1 stop5h 10mFrontier
Fri 12/122:05 pmONT - LAX
1 stop31h 06mFrontier
Deal found 11/12$139
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 12/86:21 pmLAX - ONT
1 stop5h 10mFrontier
Mon 12/1510:12 pmONT - LAX
1 stop25h 29mFrontier
Deal found 11/10$141
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 11/259:54 pmLAX - ONT
1 stop16h 32mMultiple Airlines
Mon 12/112:58 amONT - LAX
1 stop17h 40mMultiple Airlines
Deal found 11/12$143
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 11/309:54 pmLAX - ONT
1 stop23h 12mMultiple Airlines
Fri 12/52:05 pmONT - LAX
1 stop31h 06mMultiple Airlines
Deal found 11/12$148
This Kiwi.com deal was found by Cheapflights users on 11/10. 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 11/246:00 amLAX - ONT
1 stop8h 26mMultiple Airlines
Thu 11/276:30 amONT - LAX
1 stop13h 17mMultiple Airlines
Deal found 11/10$150
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 12/103:30 pmLAX - ONT
1 stop5h 47mFrontier
Wed 12/176:15 amONT - LAX
2 stops25h 27mFrontier
Deal found 11/12$152

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 November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$110
(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 November 12, 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

Tue 12/9

7:35 pm-9:17 pm

2 stops25h 42m

Ontario

Tue 12/16

6:15 am-8:05 pm

1 stop13h 50m

$110

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 12/1

3:18 pm-9:06 pm

1 stop5h 48m

Ontario

Fri 12/5

10:12 pm-11:41 pm

1 stop25h 29m

$130

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 11/25

3:18 pm-9:06 pm

1 stop5h 48m

Ontario

Tue 12/2

6:15 am-8:05 pm

1 stop13h 50m

$130

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Sat 12/6

3:30 pm-9:17 pm

1 stop5h 47m

Ontario

Mon 12/8

10:12 pm-11:41 pm

1 stop25h 29m

$131

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/10

3:30 pm-9:17 pm

1 stop5h 47m

Ontario

Wed 12/17

6:15 am-8:05 pm

1 stop13h 50m

$131

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Sun 11/23

9:54 pm-9:06 pm

1 stop23h 12m

Ontario

Tue 11/25

5:06 pm-8:59 pm

1 stop3h 53m

$134

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Fri 12/19

1:11 pm-4:31 pm

1 stop27h 20m

Ontario

Thu 12/25

6:07 pm-12:16 pm

1 stop18h 09m

$139

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 12/8

6:21 pm-11:31 pm

1 stop5h 10m

Ontario

Fri 12/12

2:05 pm-9:11 pm

1 stop31h 06m

$139

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 12/8

6:21 pm-11:31 pm

1 stop5h 10m

Ontario

Mon 12/15

10:12 pm-11:41 pm

1 stop25h 29m

$141

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 11/25

9:54 pm-2:26 pm

1 stop16h 32m

Ontario

Mon 12/1

12:58 am-6:38 pm

1 stop17h 40m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 23 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 November.
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 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 25h 42m. 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 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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