$77+ Cheap flights from Los Angeles to Ontario (LAX - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ONT
Oct 20 — Oct 271
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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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 September 20, 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 September 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/158:22 am -
1 stop11h 18m
Mon 10/1912:01 pm -
1 stop9h 00m
Deal found 9/19![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/298:44 am -
1 stop10h 44m
Sun 11/112:01 pm -
1 stop22h 45m
Deal found 9/19![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Thu 10/89:57 pm -
1 stop9h 07m
Tue 10/136:15 am -
1 stop18h 14m
Deal found 9/18![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sat 12/56:40 pm -
1 stop4h 43m
Mon 12/77:26 pm -
1 stop27h 38m
Deal found 9/16![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sat 10/176:05 am -
1 stop17h 45m
Sat 10/2411:52 am -
1 stop12h 37m
Deal found 9/19![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sun 10/119:57 pm -
1 stop9h 07m
Sat 10/1710:04 am -
1 stop8h 13m
Deal found 9/19![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sat 10/1711:19 am -
1 stop5h 11m
Mon 10/198:35 pm -
1 stop11h 14m
Deal found 9/16![Frontier logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Sun 11/17:36 pm -
1 stop15h 40m
Wed 11/411:52 am -
1 stop22h 55m
Deal found 9/18![Frontier logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Sun 10/184:33 pm -
1 stop14h 31m
Sun 10/2512:01 pm -
1 stop22h 34m
Deal found 9/20![Frontier logo]()
$226
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 September 20, 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 September 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/158:22 am -
1 stop11h 18m
Mon 10/1912:01 pm -
1 stop9h 00m
Deal found 9/19![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/298:44 am -
1 stop10h 44m
Sun 11/112:01 pm -
1 stop22h 45m
Deal found 9/19![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sat 10/176:05 am -
1 stop17h 45m
Sat 10/2411:52 am -
1 stop12h 37m
Deal found 9/19![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Sun 10/184:33 pm -
1 stop14h 31m
Sun 10/2512:01 pm -
1 stop22h 34m
Deal found 9/20![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Sat 10/3110:05 am -
1 stop6h 16m
Mon 11/212:01 pm -
1 stop10h 27m
Deal found 9/18![Frontier logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/139:15 am -
1 stop7h 15m
Tue 10/205:25 pm -
2 stops27h 36m
Deal found 9/15![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sat 10/1711:19 am -
1 stop5h 11m
Sat 11/710:00 am -
1 stop6h 16m
Deal found 9/16![Frontier logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/161:32 pm -
1 stop19h 37m
Mon 10/1912:01 pm -
1 stop9h 00m
Deal found 9/16![Frontier logo]()
$264
Last-minute flights from Los Angeles to OntarioDiscover last-minute flight deals from Los Angeles to Ontario. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from Los Angeles to Ontario. Data last updated September 20, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Thu 10/89:57 pm -
1 stop9h 07m
Tue 10/136:15 am -
1 stop18h 14m
Deal found 9/18![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sun 10/119:57 pm -
1 stop9h 07m
Sat 10/1710:04 am -
1 stop8h 13m
Deal found 9/19![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/158:22 am -
1 stop11h 18m
Mon 10/1912:01 pm -
1 stop9h 00m
Deal found 9/19![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sat 10/176:05 am -
1 stop17h 45m
Sat 10/2411:52 am -
1 stop12h 37m
Deal found 9/19![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 9/16. 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.
Sat 10/1711:19 am -
1 stop5h 11m
Mon 10/198:35 pm -
1 stop11h 14m
Deal found 9/16![Frontier logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Sun 10/184:33 pm -
1 stop14h 31m
Sun 10/2512:01 pm -
1 stop22h 34m
Deal found 9/20![Frontier logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/298:44 am -
1 stop10h 44m
Sun 11/112:01 pm -
1 stop22h 45m
Deal found 9/19![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Sat 10/3110:05 am -
1 stop6h 16m
Mon 11/212:01 pm -
1 stop10h 27m
Deal found 9/18![Frontier logo]()
$229
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 September 20, 2026.
Search for one-way flight options from Los Angeles to Ontario. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/19. 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 10/198:22 am -
1 stop11h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sat 10/177:03 pm -
1 stop24h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 9/18. 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.
Fri 10/168:22 am -
1 stop11h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Thu 10/158:22 am -
1 stop11h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sun 10/119:57 pm -
1 stop9h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Wed 10/711:30 am -
1 stop5h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 9/19. 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.
Sun 10/259:57 pm -
1 stop9h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/65:20 pm -
1 stop15h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$135
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 September 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $119 (Kiwi.com) |
One-way from | $77 (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 7,457,451 searches. Data last updated September 20, 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 Los Angeles - ONT Ontario
LAXONT
Los Angeles
Mon 10/19
7:03 pm-11:50 pm
2 stops28h 47m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$98
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Sat 10/17
7:03 pm-7:40 pm
1 stop24h 37m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$112
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Thu 10/15
8:22 am-7:40 pm
1 stop11h 18m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$119
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Thu 10/15
8:22 am-7:40 pm
1 stop11h 18m
Ontario
Mon 10/19
12:01 pm-9:01 pm
1 stop9h 00m
$119
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Fri 10/16
9:57 pm-11:50 pm
2 stops25h 53m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$128
Quickest round-trip
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Wed 10/7
11:30 am-4:59 pm
1 stop5h 29m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$130
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Sun 10/25
9:57 pm-7:04 am
1 stop9h 07m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$131
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Thu 10/29
8:44 am-7:28 pm
1 stop10h 44m
Ontario
Sun 11/1
12:01 pm-10:46 am
1 stop22h 45m
$157
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Sat 10/17
6:05 am-11:50 pm
1 stop17h 45m
Ontario
Sat 10/24
11:52 am-12:29 am
1 stop12h 37m
$204
Los AngelesOntario
LAX Los Angeles - ONT Ontario
LAXONT
Los Angeles
Sun 10/4
2:50 pm-11:22 am
1 stop20h 32m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$222
Showing 1-10 of 15 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 September.
| 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 18% of weekly flights between Los Angeles and Ontario have experienced delays in the past year, with the average delay time being 96 minutes.
What is the most punctual flight time for Los Angeles to Ontario flights?
Historically, flights departing at night 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
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