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Ontario

$65+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
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 February 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/17. 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 3/184:07 pm
LAX
-
ONT
1 stop4h 56m
Multiple Airlines
Wed 3/2510:03 pm
ONT
-
LAX
1 stop10h 17m
Multiple Airlines
Deal found 2/17$129
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 3/99:12 am
LAX
-
ONT
1 stop6h 25m
Multiple Airlines
Mon 3/1611:17 am
ONT
-
LAX
1 stop5h 16m
Multiple Airlines
Deal found 2/18$130
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 3/176:30 pm
LAX
-
ONT
1 stop18h 58m
Frontier
Tue 3/242:23 pm
ONT
-
LAX
1 stop22h 16m
Frontier
Deal found 2/17$131
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 4/210:03 am
LAX
-
ONT
1 stop7h 12m
Multiple Airlines
Mon 4/611:10 am
ONT
-
LAX
1 stop21h 56m
Multiple Airlines
Deal found 2/19$132
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 3/1610:03 am
LAX
-
ONT
1 stop5h 34m
Multiple Airlines
Wed 3/1810:03 pm
ONT
-
LAX
1 stop10h 17m
Multiple Airlines
Deal found 2/17$133
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 3/109:12 am
LAX
-
ONT
1 stop4h 16m
Multiple Airlines
Wed 3/116:15 am
ONT
-
LAX
1 stop18h 01m
Multiple Airlines
Deal found 2/19$137
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 3/210:37 pm
LAX
-
ONT
1 stop14h 34m
Frontier
Thu 3/57:22 pm
ONT
-
LAX
1 stop21h 50m
Frontier
Deal found 2/19$139
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 4/268:58 pm
LAX
-
ONT
1 stop16h 12m
Frontier
Tue 4/2811:44 am
ONT
-
LAX
1 stop4h 31m
Frontier
Deal found 2/21$141
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 3/36:33 pm
LAX
-
ONT
1 stop18h 38m
Frontier
Thu 3/57:22 pm
ONT
-
LAX
1 stop12h 58m
Frontier
Deal found 2/18$142
This Kiwi.com deal was found by Cheapflights users on 2/21. 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 4/169:12 am
LAX
-
ONT
1 stop9h 42m
Multiple Airlines
Mon 4/272:05 pm
ONT
-
LAX
1 stop26h 10m
Multiple Airlines
Deal found 2/21$144
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 3/211:19 pm
LAX
-
ONT
1 stop5h 17m
Frontier
Sat 3/287:31 pm
ONT
-
LAX
1 stop12h 49m
Frontier
Deal found 2/20$146

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 February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$129
(Kiwi.com)

One-way from

$65
(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 February 21, 2026.
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

Wed 3/18

4:07 pm-9:03 pm

1 stop4h 56m

Ontario

Wed 3/25

10:03 pm-8:20 am

1 stop10h 17m

$129

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 3/9

9:12 am-3:37 pm

1 stop6h 25m

Ontario

Mon 3/16

11:17 am-4:33 pm

1 stop5h 16m

$130

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 3/17

6:30 pm-1:28 pm

1 stop18h 58m

Ontario

Tue 3/24

2:23 pm-12:39 pm

1 stop22h 16m

$131

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 4/2

4:07 pm-8:04 am

1 stop15h 57m

Ontario

Mon 4/6

11:10 am-9:06 am

1 stop21h 56m

$131

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Thu 3/19

6:15 pm-8:06 am

1 stop13h 51m

Ontario

Thu 3/26

8:07 am-8:20 am

1 stop24h 13m

$133

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 3/16

10:03 am-3:37 pm

1 stop5h 34m

Ontario

Wed 3/18

10:03 pm-8:20 am

1 stop10h 17m

$133

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 3/10

9:12 am-1:28 pm

1 stop4h 16m

Ontario

Wed 3/11

6:15 am-12:16 am

1 stop18h 01m

$137

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Mon 3/2

10:37 pm-1:11 pm

1 stop14h 34m

Ontario

Thu 3/5

7:22 pm-5:12 pm

1 stop21h 50m

$139

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Sun 4/26

8:58 pm-1:10 pm

1 stop16h 12m

Ontario

Tue 4/28

11:44 am-4:15 pm

1 stop4h 31m

$141

Los AngelesOntario

LAX - ONT

LAXONT

Los Angeles

Tue 3/3

6:33 pm-1:11 pm

1 stop18h 38m

Ontario

Thu 3/5

7:22 pm-8:20 am

1 stop12h 58m

$142

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 17 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 February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice 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

How often are flights from Los Angeles to Ontario delayed?

About 18% of weekly flights between Los Angeles and Ontario have experienced delays in the past year, with the average delay time being 53 minutes.

What is the most punctual flight time for Los Angeles to Ontario flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Los Angeles to Ontario flights?

Over the last year, Southwest have had the lowest number of delays on this route, with just 25% of flights being delayed.

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 58m. 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.

See more FAQs

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