$68+ Cheap flights from Las Vegas to Ontario (LAS - 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ONT
Sep 10 — Sep 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 September, booked 51 days in advance, depart on a Wednesday or Saturday 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 August 11, 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 August 11, 2026.
This Super.com deal was found by Cheapflights users on 8/10. 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 9/57:00 am -
Nonstop1h 03m
Sat 9/53:40 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 8/10. 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.
Fri 9/116:00 am -
Nonstop1h 04m
Tue 9/1510:04 am -
Nonstop1h 14m
Deal found 8/10![Frontier logo]()
$94
This Super.com deal was found by Cheapflights users on 8/10. 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.
Tue 10/203:00 pm -
Nonstop1h 10m
Wed 11/1812:57 pm -
Nonstop1h 09m
Deal found 8/10![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 8/10. 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.
Wed 9/98:00 am -
Nonstop1h 09m
Wed 9/1610:04 am -
Nonstop1h 14m
Deal found 8/10![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 8/10. 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.
Fri 9/1110:03 am -
Nonstop1h 19m
Mon 9/148:24 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 8/10. 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 9/308:00 am -
Nonstop1h 09m
Mon 10/58:00 am -
Nonstop1h 02m
Deal found 8/10![Frontier logo]()
$102
This Travelocity deal was found by Cheapflights users on 8/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:00 pm -
Nonstop1h 10m
Sat 10/314:27 pm -
Nonstop1h 10m
Deal found 8/10![Frontier logo]()
$103
This Super.com deal was found by Cheapflights users on 8/10. 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 9/1010:03 am -
Nonstop1h 19m
Sat 9/122:30 pm -
Nonstop1h 10m
Deal found 8/10![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 8/10. 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.
Thu 9/103:45 pm -
Nonstop1h 14m
Mon 9/142:30 pm -
Nonstop1h 10m
Deal found 8/10![Frontier logo]()
$108
This Frontier deal was found by Cheapflights users on 8/10. 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.
Thu 9/1710:03 am -
Nonstop1h 19m
Mon 9/218:24 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$110
This Super.com deal was found by Cheapflights users on 8/10. 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 9/106:00 am -
Nonstop1h 04m
Sun 9/138:00 am -
Nonstop1h 02m
Deal found 8/10![Frontier logo]()
$111
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 August 11, 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 August 11, 2026.
This Southwest deal was found by Cheapflights users on 8/10. 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 10/288:00 am -
1 stop4h 00m
Sat 10/3110:30 am -
2 stops5h 20m
Deal found 8/10![Southwest logo]()
$206
This Frontier deal was found by Cheapflights users on 8/10. 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.
Thu 8/2712:59 am -
1 stop7h 39m
Fri 8/2811:50 am -
Nonstop1h 10m
Deal found 8/10![Frontier logo]()
$224
This United Airlines deal was found by Cheapflights users on 8/8. 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 10/35:15 am -
1 stop7h 31m
Tue 10/65:00 am -
1 stop5h 41m
Deal found 8/8![United Airlines logo]()
$370
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:07 pm -
2 stops20h 45m
Sun 9/64:27 pm -
2 stops6h 08m
Deal found 8/9![Alaska Airlines logo]()
$414
This Southwest deal was found by Cheapflights users on 8/6. 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 9/34:50 pm -
1 stop4h 30m
Thu 9/106:10 am -
2 stops5h 15m
Deal found 8/6![Southwest logo]()
$260
This Southwest deal was found by Cheapflights users on 8/9. 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 9/115:20 pm -
1 stop3h 25m
Sat 9/128:35 am -
2 stops6h 20m
Deal found 8/9![Southwest logo]()
$278
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Sun 9/66:00 am -
2 stops6h 12m
Sun 9/135:00 am -
1 stop7h 26m
Deal found 8/7![United Airlines logo]()
$383
This Southwest deal was found by Cheapflights users on 8/6. 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 8/246:20 pm -
1 stop3h 50m
Fri 8/286:10 am -
2 stops5h 15m
Deal found 8/6![Southwest logo]()
$341
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/285:20 am -
1 stop7h 30m
Fri 9/47:13 pm -
1 stop5h 15m
Deal found 8/6![United Airlines logo]()
$386
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/13:06 pm -
1 stop5h 47m
Fri 9/47:13 pm -
1 stop5h 15m
Deal found 8/8![United Airlines logo]()
$419
Last-minute flights from Las Vegas to OntarioDiscover last-minute flight deals from Las Vegas to Ontario. Data last updated August 11, 2026 and is based on user searches.
Discover last-minute flight deals from Las Vegas to Ontario. Data last updated August 11, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/10. 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 9/57:00 am -
Nonstop1h 03m
Sat 9/53:40 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$89
This Frontier deal was found by Cheapflights users on 8/10. 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.
Wed 9/98:00 am -
Nonstop1h 09m
Wed 9/1610:04 am -
Nonstop1h 14m
Deal found 8/10![Frontier logo]()
$98
This Frontier deal was found by Cheapflights users on 8/10. 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.
Wed 9/93:45 pm -
Nonstop1h 14m
Mon 9/148:24 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$103
This Super.com deal was found by Cheapflights users on 8/10. 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 9/1010:03 am -
Nonstop1h 19m
Sat 9/122:30 pm -
Nonstop1h 10m
Deal found 8/10![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 8/10. 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.
Thu 9/103:45 pm -
Nonstop1h 14m
Mon 9/142:30 pm -
Nonstop1h 10m
Deal found 8/10![Frontier logo]()
$108
This Super.com deal was found by Cheapflights users on 8/10. 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 9/106:00 am -
Nonstop1h 04m
Sun 9/138:00 am -
Nonstop1h 02m
Deal found 8/10![Frontier logo]()
$111
This Frontier deal was found by Cheapflights users on 8/10. 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.
Fri 9/116:00 am -
Nonstop1h 04m
Tue 9/1510:04 am -
Nonstop1h 14m
Deal found 8/10![Frontier logo]()
$94
This Frontier deal was found by Cheapflights users on 8/10. 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.
Fri 9/1110:03 am -
Nonstop1h 19m
Mon 9/148:24 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$99
This Frontier deal was found by Cheapflights users on 8/10. 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.
Thu 9/1710:03 am -
Nonstop1h 19m
Mon 9/218:24 pm -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$110
This Super.com deal was found by Cheapflights users on 8/10. 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 9/308:00 am -
Nonstop1h 09m
Mon 10/58:00 am -
Nonstop1h 02m
Deal found 8/10![Frontier logo]()
$102
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 August 11, 2026.
Search for one-way flight options from Las Vegas to Ontario. Find affordable one-way fares based on user searches. Data last updated August 11, 2026.
This Frontier deal was found by Cheapflights users on 8/10. 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.
Sat 10/179:10 am -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 10/269:10 am -
Nonstop1h 11m
Deal found 8/10![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/94:30 pm -
1 stop27h 06m
Deal found 8/7![Frontier logo]()
$71
This Super.com deal was found by Cheapflights users on 8/7. 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 8/297:00 am -
Nonstop1h 03m
Deal found 8/7![Frontier logo]()
$72
This Frontier deal was found by Cheapflights users on 8/7. 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.
Tue 9/82:40 pm -
Nonstop1h 09m
Deal found 8/7![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 8/7. 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.
Sat 11/73:00 pm -
Nonstop1h 10m
Deal found 8/7![Frontier logo]()
$74
This Super.com deal was found by Cheapflights users on 8/7. 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 9/36:30 am -
1 stop3h 59m
Deal found 8/7![Frontier logo]()
$77
This Frontier deal was found by Cheapflights users on 8/7. 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.
Tue 8/252:45 pm -
Nonstop1h 09m
Deal found 8/7![Frontier logo]()
$79
This Mytrip deal was found by Cheapflights users on 8/10. 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.
Fri 8/283:20 pm -
Nonstop1h 02m
Deal found 8/10![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 8/9. 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.
Thu 9/246:00 am -
Nonstop1h 04m
Deal found 8/9![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 8/8. 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 9/164:30 pm -
1 stop27h 06m
Deal found 8/8![Frontier logo]()
$83
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 August 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $94 (Frontier) |
One-way from | $68 (Frontier) |
Popular in | June |
Cheapest in | January |
Average price | $192 |
Good round-trip deal | $299 or less |
Good one-way deal | $158 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 2,558,603 searches. Data last updated August 11, 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
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Wed 10/28
8:00 am-12:00 pm
1 stop4h 00m
Ontario
Sat 10/31
10:30 am-3:50 pm
2 stops5h 20m
$206
Quickest round-trip
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Thu 8/27
12:59 am-8:38 am
1 stop7h 39m
Ontario
Fri 8/28
11:50 am-1:00 pm
Nonstop1h 10m
$224
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Thu 9/3
4:50 pm-9:20 pm
1 stop4h 30m
Ontario
Thu 9/10
6:10 am-11:25 am
2 stops5h 15m
$260
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Fri 9/11
5:20 pm-8:45 pm
1 stop3h 25m
Ontario
Sat 9/12
8:35 am-2:55 pm
2 stops6h 20m
$278
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Mon 8/24
6:20 pm-10:10 pm
1 stop3h 50m
Ontario
Fri 8/28
6:10 am-11:25 am
2 stops5h 15m
$341
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Sat 10/3
5:15 am-12:46 pm
1 stop7h 31m
Ontario
Tue 10/6
5:00 am-10:41 am
1 stop5h 41m
$370
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Sun 9/6
6:00 am-12:12 pm
2 stops6h 12m
Ontario
Sun 9/13
5:00 am-12:26 pm
1 stop7h 26m
$383
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Fri 8/28
5:20 am-12:50 pm
1 stop7h 30m
Ontario
Fri 9/4
7:13 pm-12:28 am
1 stop5h 15m
$386
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Fri 9/4
7:07 pm-3:52 pm
2 stops20h 45m
Ontario
Sun 9/6
4:27 pm-10:35 pm
2 stops6h 08m
$414
Las VegasOntario
LAS Las Vegas Harry Reid Intl - ONT Ontario
LASONT
Las Vegas Harry Reid Intl
Tue 9/1
3:06 pm-8:53 pm
1 stop5h 47m
Ontario
Fri 9/4
7:13 pm-12:28 am
1 stop5h 15m
$419
Showing 1-10 of 20 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 August.
| 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 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
Prices
Airlines
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 $97). 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 August 11, 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 49% 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 August 8, 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.
Cheapflights partnered with top experts to bring you the best recommendations for your Las Vegas to Ontario trip
Our travel experts
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 August 11, 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
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Crew
8.6
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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Las Vegas
Popular flights
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 August 11, 2026.
Las Vegas and Ontario flights
Browse other Las Vegas and Ontario flight options. Last updated on August 11, 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 August 11, 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 2,558,603 searches. Data last updated August 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$48 | Average$122 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$107 | Average$312 | FlexibilityNo cancel fee | On-time63% |