$50+ Cheap flights from Las Vegas to Ontario (LAS - 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ONT
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from Las Vegas 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.Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Ontario are usually found in January or October, booked 51 days in advance, depart on a Wednesday or Friday and return on a Saturday
Cheap flight deals from Las Vegas to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Las Vegas to OntarioExplore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
Explore the most affordable flight options available from Las Vegas to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2026.
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:20 pm -
Nonstop1h 10m
Sat 10/245:25 pm -
Nonstop1h 13m
Deal found 9/19![Frontier logo]()
$50
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:00 am -
Nonstop1h 09m
Sat 10/32:30 pm -
Nonstop1h 10m
Deal found 9/19![Frontier logo]()
$74
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:00 am -
Nonstop1h 09m
Sat 10/1710:04 am -
Nonstop1h 09m
Deal found 9/20![Frontier logo]()
$114
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:20 am -
Nonstop1h 11m
Wed 10/215:25 pm -
Nonstop1h 13m
Deal found 9/18![Frontier logo]()
$121
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 am -
Nonstop1h 09m
Mon 10/198:35 pm -
Nonstop1h 08m
Deal found 9/19![Frontier logo]()
$126
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:20 pm -
Nonstop1h 10m
Mon 10/128:00 am -
Nonstop1h 08m
Deal found 9/18![Frontier logo]()
$127
This Booking.com deal was found by Cheapflights users on 9/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:03 am -
Nonstop1h 13m
Thu 10/292:23 pm -
Nonstop1h 08m
Deal found 9/22![Frontier logo]()
$128
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.
Tue 10/209:20 am -
Nonstop1h 11m
Thu 10/2212:01 pm -
1 stop12h 02m
Deal found 9/20![Frontier logo]()
$130
Best flights from Las Vegas to OntarioDiscover carefully curated flight deals from Las Vegas to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from Las Vegas to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:30 am -
1 stop13h 10m
Thu 10/1512:01 pm -
1 stop12h 02m
Deal found 9/18![Frontier logo]()
$190
This Southwest deal was found by Cheapflights users on 9/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:25 pm -
Nonstop1h 05m
Thu 11/124:00 pm -
Nonstop1h 05m
Deal found 9/21![Southwest logo]()
$217
This United Airlines deal was found by Cheapflights users on 9/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:15 am -
1 stop7h 31m
Tue 10/275:00 am -
1 stop5h 41m
Deal found 9/22![United Airlines logo]()
$308
This Southwest deal was found by Cheapflights users on 9/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:10 am -
2 stops5h 15m
Sat 10/1711:30 am -
1 stop6h 05m
Deal found 9/22![Southwest logo]()
$242
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:55 am -
2 stops7h 20m
Thu 12/33:30 pm -
1 stop3h 40m
Deal found 9/18![Southwest logo]()
$260
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 10/189:55 pm -
2 stops21h 45m
Sun 10/251:38 pm -
Nonstop1h 10m
Deal found 9/20![Frontier logo]()
$322
This United Airlines deal was found by Cheapflights users on 9/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/153:03 pm -
1 stop6h 08m
Thu 12/175:00 am -
1 stop5h 43m
Deal found 9/21![United Airlines logo]()
$327
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/223:50 pm -
1 stop5h 20m
Sun 2/287:00 am -
2 stops4h 50m
Deal found 9/20![Southwest logo]()
$298
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:07 pm -
1 stop5h 44m
Sun 10/49:25 am -
1 stop6h 38m
Deal found 9/19![United Airlines logo]()
$337
This United Airlines deal was found by Cheapflights users on 9/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:15 am -
1 stop7h 31m
Fri 10/305:00 am -
1 stop5h 41m
Deal found 9/22![United Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 9/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:55 pm -
2 stops5h 15m
Sun 10/1810:55 am -
1 stop4h 35m
Deal found 9/22![Southwest logo]()
$355
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/188:00 am -
Nonstop1h 05m
Sun 10/257:00 am -
Nonstop1h 05m
Deal found 9/20![Southwest logo]()
$369
Last-minute flights from Las Vegas to OntarioDiscover last-minute flight deals from Las Vegas to Ontario. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from Las Vegas to Ontario. Data last updated September 23, 2026 and is based on user searches.
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:00 am -
Nonstop1h 09m
Sat 10/32:30 pm -
Nonstop1h 10m
Deal found 9/19![Frontier logo]()
$74
This Justfly.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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:00 am -
Nonstop1h 09m
Sat 10/1710:04 am -
Nonstop1h 09m
Deal found 9/20![Frontier logo]()
$114
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:20 pm -
Nonstop1h 10m
Mon 10/128:00 am -
Nonstop1h 08m
Deal found 9/18![Frontier logo]()
$127
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:00 am -
Nonstop1h 09m
Mon 10/198:35 pm -
Nonstop1h 08m
Deal found 9/19![Frontier logo]()
$126
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.
Tue 10/209:20 am -
Nonstop1h 11m
Thu 10/2212:01 pm -
1 stop12h 02m
Deal found 9/20![Frontier logo]()
$130
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:20 am -
Nonstop1h 11m
Wed 10/215:25 pm -
Nonstop1h 13m
Deal found 9/18![Frontier logo]()
$121
This Booking.com deal was found by Cheapflights users on 9/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:03 am -
Nonstop1h 13m
Thu 10/292:23 pm -
Nonstop1h 08m
Deal found 9/22![Frontier logo]()
$128
This 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:20 pm -
Nonstop1h 10m
Sat 10/245:25 pm -
Nonstop1h 13m
Deal found 9/19![Frontier logo]()
$50
One-way flights from Las Vegas to OntarioSearch for one-way flight options from Las Vegas to Ontario. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from Las Vegas to Ontario. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This Mytrip deal was found by Cheapflights users on 9/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:00 am -
Nonstop1h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Frontier logo]()
$64
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/293:13 pm -
Nonstop1h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$65
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/912:03 pm -
1 stop11h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$66
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/25:22 pm -
Nonstop1h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$67
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:35 pm -
1 stop26h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$68
This Jetabroad 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:10 am -
Nonstop1h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$69
This Mytrip deal was found by Cheapflights users on 9/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:00 am -
1 stop8h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 9/21. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/153:14 pm -
1 stop4h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Frontier logo]()
$71
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/93:17 pm -
1 stop4h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Frontier logo]()
$72
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/123:20 pm -
Nonstop1h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$73
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:00 am -
Nonstop1h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$74
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:35 pm -
1 stop26h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$75
Find flight deals from Las Vegas to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) 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 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $50 |
Popular in | June |
Cheapest in | January |
Average price | $132 |
Good round-trip deal | $187 or less |
Good one-way deal | $141 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Las Vegas 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 23, 2026.
Use the filters below to find and compare flights from Las Vegas to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Sat 10/10
2:55 pm-4:00 pm
Nonstop1h 05m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$109
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Tue 10/20
8:10 am-1:25 pm
2 stops5h 15m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$124
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Thu 10/15
6:40 am-12:14 pm
1 stop5h 34m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$145
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Mon 10/12
4:55 pm-10:10 pm
2 stops5h 15m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$161
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Mon 10/12
5:55 pm-10:51 pm
1 stop4h 56m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$164
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Wed 12/23
6:40 pm-10:53 pm
1 stop4h 13m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$164
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Mon 10/19
3:17 pm-8:31 pm
1 stop5h 14m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$164
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Mon 12/21
7:00 am-11:58 am
1 stop4h 58m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$164
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Sat 10/3
1:25 pm-5:46 pm
1 stop4h 21m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$169
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Sun 10/18
8:00 am-9:05 am
Nonstop1h 05m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$175
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Las Vegas 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 Las Vegas to Ontario in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Las Vegas-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Las Vegas-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Las Vegas-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Las Vegas-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 Las Vegas-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 Las Vegas to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Las Vegas with our price prediction graph.
LAS-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 Las Vegas to Ontario
How far ahead should I book a flight from Las Vegas to Ontario?
To ensure you get the cheapest price possible for a flight from Las Vegas to Ontario, you should look to book at least 50 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Las Vegas to Ontario?
Currently, January is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $78). Flying from Las Vegas to Ontario in June is currently the most expensive (average of $330). 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.
What is the cheapest time of day to fly from LAS to ONT?
Find hourly flight availability from Las Vegas to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 23, 2026.
When flying from Las Vegas to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 51% versus a flight at noon.
What is the cheapest day to fly from Las Vegas to Ontario?
Use this chart to determine the cheapest time to fly round-trip from Las Vegas to Ontario. Price data was last updated on September 19, 2026.
Travelers seeking maximum savings on their Las Vegas to Ontario flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Las Vegas to Ontario flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
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Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated September 23, 2026.
Read through reviews of airlines operating flights from Las Vegas to Ontario, such as Southwest and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Entertainment
7.5
Overall
8.0
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Las Vegas to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Las Vegas to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Las Vegas to Ontario by cabin class
Find flights from Las Vegas to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 23, 2026.
Las Vegas and Ontario flights
Browse other Las Vegas and Ontario flight options. Last updated on September 23, 2026.
Other flights from Las Vegas
Browse through other flights departing from Las Vegas. Flights are based on user searches made on Cheapflights and were last updated on September 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Las Vegas to Ontario
Discover the top 2 airlines that operate flights from Las Vegas to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$43 | Average$129 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$152 | Average$312 | FlexibilityNo cancel fee | On-time63% |