$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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Sep 3 — Sep 101
Round-trip
1 adult, Economy
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Find cheap flights from Los Angeles to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Los Angeles to Ontario
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Best
Last-minute
One-way
Cheapest flights from Los Angeles to OntarioExplore 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 August 4, 2026.
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 August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:30 am -
1 stop17h 20m
Thu 9/1012:07 pm -
1 stop10h 15m
Deal found 7/30![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/19:40 am -
1 stop14h 10m
Thu 9/1012:07 pm -
1 stop10h 15m
Deal found 7/30![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/17:13 pm -
1 stop19h 14m
Tue 9/83:13 pm -
1 stop19h 24m
Deal found 8/4![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:30 am -
1 stop17h 20m
Sat 9/126:15 am -
1 stop8h 24m
Deal found 7/30![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/19:40 am -
1 stop14h 10m
Wed 9/96:15 am -
1 stop7h 59m
Deal found 7/30![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/319:09 pm -
1 stop12h 55m
Mon 9/78:48 am -
1 stop12h 51m
Deal found 7/30![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:30 am -
1 stop17h 20m
Tue 9/83:13 pm -
1 stop6h 41m
Deal found 7/30![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/59:09 pm -
1 stop12h 55m
Wed 9/96:15 am -
1 stop7h 59m
Deal found 7/30![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/2710:27 pm -
1 stop17h 55m
Thu 9/38:48 am -
1 stop13h 06m
Deal found 7/30![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/118:44 am -
1 stop10h 52m
Sun 9/132:30 pm -
1 stop17h 17m
Deal found 8/3![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/296:55 am -
1 stop25h 08m
Sat 9/57:56 pm -
1 stop12h 34m
Deal found 8/1![Frontier logo]()
$162
Best flights from Los Angeles to OntarioDiscover carefully curated flight deals from Los Angeles to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 4, 2026.
Discover carefully curated flight deals from Los Angeles to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/319:09 pm -
1 stop12h 55m
Wed 9/96:15 am -
1 stop7h 59m
Deal found 7/30![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/19:40 am -
1 stop14h 10m
Fri 9/118:00 am -
1 stop10h 44m
Deal found 7/30![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 10/72:01 pm -
1 stop9h 46m
Thu 10/811:16 am -
1 stop4h 36m
Deal found 8/1![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 11/911:47 am -
1 stop4h 23m
Wed 11/186:15 am -
1 stop7h 29m
Deal found 7/31![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/36:55 am -
1 stop9h 27m
Thu 9/1012:07 pm -
1 stop25h 36m
Deal found 8/4![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/59:09 pm -
1 stop12h 55m
Tue 9/83:13 pm -
1 stop6h 41m
Deal found 7/30![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 10/147:43 pm -
1 stop18h 17m
Sat 10/245:05 pm -
1 stop20h 56m
Deal found 8/1![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/2710:27 pm -
1 stop9h 36m
Thu 9/311:15 am -
2 stops10h 39m
Deal found 7/30![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:55 am -
1 stop9h 27m
Sun 9/138:24 pm -
1 stop11h 23m
Deal found 7/30![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 10/206:15 am -
1 stop17h 40m
Fri 10/238:54 pm -
2 stops11h 18m
Deal found 8/1![Frontier logo]()
$198
Last-minute flights from Los Angeles to OntarioDiscover last-minute flight deals from Los Angeles to Ontario. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Los Angeles to Ontario. Data last updated August 4, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/2710:27 pm -
1 stop17h 55m
Thu 9/38:48 am -
1 stop13h 06m
Deal found 7/30![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/296:55 am -
1 stop25h 08m
Sat 9/57:56 pm -
1 stop12h 34m
Deal found 8/1![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:30 am -
1 stop17h 20m
Thu 9/1012:07 pm -
1 stop10h 15m
Deal found 7/30![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:30 am -
1 stop17h 20m
Sat 9/126:15 am -
1 stop8h 24m
Deal found 7/30![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/319:09 pm -
1 stop12h 55m
Mon 9/78:48 am -
1 stop12h 51m
Deal found 7/30![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/316:30 am -
1 stop17h 20m
Tue 9/83:13 pm -
1 stop6h 41m
Deal found 7/30![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/19:40 am -
1 stop14h 10m
Thu 9/1012:07 pm -
1 stop10h 15m
Deal found 7/30![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 9/17:13 pm -
1 stop19h 14m
Tue 9/83:13 pm -
1 stop19h 24m
Deal found 8/4![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/19:40 am -
1 stop14h 10m
Wed 9/96:15 am -
1 stop7h 59m
Deal found 7/30![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/59:09 pm -
1 stop12h 55m
Wed 9/96:15 am -
1 stop7h 59m
Deal found 7/30![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/118:44 am -
1 stop10h 52m
Sun 9/132:30 pm -
1 stop17h 17m
Deal found 8/3![Frontier logo]()
$160
One-way flights from Los Angeles to OntarioSearch for one-way flight options from Los Angeles to Ontario. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
Search for one-way flight options from Los Angeles to Ontario. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/17:13 pm -
1 stop19h 14m
Deal found 8/3![Frontier logo]()
$67
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 10/1010:27 pm -
1 stop11h 54m
Deal found 8/4![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/137:44 pm -
1 stop23h 52m
Deal found 8/3![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 8/126:30 am -
1 stop8h 44m
Deal found 8/2![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 8/157:07 pm -
1 stop15h 55m
Deal found 8/4![Frontier logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 8/99:09 pm -
2 stops39h 39m
Deal found 8/3![Frontier logo]()
$322
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 August 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $122 (Kiwi.com) |
One-way from | $67 (Kiwi.com) |
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 August 4, 2026.
Use the filters below to find and compare flights from Los Angeles to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Mon 8/31
9:09 pm-10:04 am
1 stop12h 55m
Ontario
Wed 9/9
6:15 am-2:14 pm
1 stop7h 59m
$138
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Tue 9/1
9:40 am-11:50 pm
1 stop14h 10m
Ontario
Fri 9/11
8:00 am-6:44 pm
1 stop10h 44m
$163
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Wed 10/7
2:01 pm-11:47 pm
1 stop9h 46m
Ontario
Thu 10/8
11:16 am-3:52 pm
1 stop4h 36m
$169
Quickest round-trip
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Mon 11/9
11:47 am-4:10 pm
1 stop4h 23m
Ontario
Wed 11/18
6:15 am-1:44 pm
1 stop7h 29m
$172
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Thu 9/3
6:55 am-4:22 pm
1 stop9h 27m
Ontario
Thu 9/10
12:07 pm-1:43 pm
1 stop25h 36m
$173
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Sat 9/5
9:09 pm-10:04 am
1 stop12h 55m
Ontario
Tue 9/8
3:13 pm-9:54 pm
1 stop6h 41m
$174
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Wed 10/14
7:43 pm-2:00 pm
1 stop18h 17m
Ontario
Sat 10/24
5:05 pm-2:01 pm
1 stop20h 56m
$185
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Thu 8/27
10:27 pm-8:03 am
1 stop9h 36m
Ontario
Thu 9/3
11:15 am-9:54 pm
2 stops10h 39m
$197
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Mon 8/31
6:55 am-4:22 pm
1 stop9h 27m
Ontario
Sun 9/13
8:24 pm-7:47 am
1 stop11h 23m
$197
Los AngelesOntario
LAX - ONT
LAXONT
Los Angeles
Tue 10/20
6:15 am-11:55 pm
1 stop17h 40m
Ontario
Fri 10/23
8:54 pm-8:12 am
2 stops11h 18m
$198
Showing 1-10 of 19 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
LAX-ONT
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 28% of weekly flights between Los Angeles and Ontario have experienced delays in the past year, with the average delay time being 86 minutes.
What is the most punctual flight time for Los Angeles to Ontario flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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