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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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/26. 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 12/301:11 pmLAX - ONT
1 stop4h 11mFrontier
Wed 1/147:15 amONT - LAX
1 stop13h 17mFrontier
Deal found 11/26$149
This Kiwi.com deal was found by Cheapflights users on 11/25. 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 12/241:11 pmLAX - ONT
1 stop4h 04mFrontier
Thu 1/16:00 amONT - LAX
1 stop6h 16mFrontier
Deal found 11/25$171
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 12/229:20 pmLAX - ONT
1 stop20h 02mMultiple Airlines
Mon 12/296:00 pmONT - LAX
1 stop13h 18mMultiple Airlines
Deal found 11/24$172
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 12/239:20 pmLAX - ONT
1 stop19h 55mMultiple Airlines
Mon 12/296:00 pmONT - LAX
1 stop13h 18mMultiple Airlines
Deal found 11/24$184
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 12/23:30 pmLAX - ONT
1 stop5h 47mFrontier
Tue 12/96:15 amONT - LAX
1 stop13h 50mFrontier
Deal found 11/24$186
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 12/239:20 pmLAX - ONT
1 stop19h 55mMultiple Airlines
Sun 12/286:37 pmONT - LAX
1 stop12h 41mMultiple Airlines
Deal found 11/24$198
This Kiwi.com deal was found by Cheapflights users on 11/25. 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 12/13:18 pmLAX - ONT
1 stop5h 48mFrontier
Mon 12/85:18 pmONT - LAX
1 stop26h 47mFrontier
Deal found 11/25$203
This Kiwi.com deal was found by Cheapflights users on 11/26. 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 12/58:51 pmLAX - ONT
1 stop17h 34mFrontier
Sat 1/103:21 pmONT - LAX
1 stop16h 58mFrontier
Deal found 11/26$213
This Kiwi.com deal was found by Cheapflights users on 11/26. 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 12/93:30 pmLAX - ONT
1 stop5h 47mFrontier
Sun 12/145:18 pmONT - LAX
1 stop26h 47mFrontier
Deal found 11/26$232

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 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$128
(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
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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 26, 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 1/8

9:12 am-4:20 pm

1 stop7h 08m

Ontario

Mon 1/12

2:34 pm-7:21 pm

1 stop4h 47m

$128

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 1/6

3:25 pm-9:50 am

1 stop18h 25m

Ontario

Wed 1/14

7:15 am-8:32 pm

1 stop13h 17m

$129

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 12/30

1:11 pm-5:22 pm

1 stop4h 11m

Ontario

Wed 1/14

7:15 am-8:32 pm

1 stop13h 17m

$149

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 2/23

9:07 pm-12:42 pm

1 stop15h 35m

Ontario

Sat 2/28

1:37 pm-8:15 am

1 stop18h 38m

$150

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 1/6

9:20 pm-9:50 am

1 stop12h 30m

Ontario

Wed 1/14

6:49 pm-8:23 am

2 stops13h 34m

$162

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Wed 12/24

1:11 pm-5:15 pm

1 stop4h 04m

Ontario

Thu 1/1

6:00 am-12:16 pm

1 stop6h 16m

$171

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 12/22

9:20 pm-5:22 pm

1 stop20h 02m

Ontario

Mon 12/29

6:00 pm-7:18 am

1 stop13h 18m

$172

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 12/2

3:30 pm-9:17 pm

1 stop5h 47m

Ontario

Tue 12/9

6:15 am-8:05 pm

1 stop13h 50m

$186

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Fri 1/16

6:01 am-11:59 pm

1 stop17h 58m

Ontario

Wed 1/21

7:15 am-10:40 pm

2 stops15h 25m

$196

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 1/8

5:48 pm-7:36 am

2 stops13h 48m

Ontario

Mon 1/12

2:34 pm-7:21 pm

1 stop4h 47m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

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 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 18h 25m. 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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