$63+ Cheap flights from Ontario to Las Vegas (ONT - LAS)
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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAS
Oct 1 — Oct 81
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Las Vegas 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 Ontario to Las Vegas Harry Reid Intl are usually found in February or January, booked 58 days in advance, depart on a Saturday or Tuesday and return on a Wednesday
Cheap flight deals from Ontario to Las Vegas
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to Las VegasExplore the most affordable flight options available from Ontario to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
Explore the most affordable flight options available from Ontario to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
This Super.com deal was found by Cheapflights users on 8/27. 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 9/248:24 pm -
Nonstop1h 11m
Thu 10/13:35 pm -
Nonstop1h 14m
Deal found 8/27![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 8/27. 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 9/248:00 am -
Nonstop1h 02m
Mon 9/286:00 am -
Nonstop1h 04m
Deal found 8/27![Frontier logo]()
$127
This Booking.com deal was found by Cheapflights users on 8/28. 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 9/178:00 am -
Nonstop1h 02m
Mon 9/216:00 am -
Nonstop1h 04m
Deal found 8/28![Frontier logo]()
$128
This Mytrip deal was found by Cheapflights users on 8/28. 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 9/1910:04 am -
Nonstop1h 14m
Tue 9/228:00 am -
Nonstop1h 09m
Deal found 8/28![Frontier logo]()
$129
This deal was found by Cheapflights users on 8/27. 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.
Wed 9/23:40 pm -
Nonstop1h 11m
Thu 9/37:00 am -
Nonstop1h 03m
Deal found 8/27![Frontier logo]()
$131
This CheapOair deal was found by Cheapflights users on 8/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:04 am -
Nonstop1h 14m
Thu 9/173:45 pm -
Nonstop1h 14m
Deal found 8/27![Frontier logo]()
$132
This CheapOair deal was found by Cheapflights users on 8/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:30 pm -
Nonstop1h 10m
Sat 10/103:20 pm -
Nonstop1h 10m
Deal found 8/28![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 8/28. 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 10/2810:35 am -
Nonstop1h 07m
Sat 10/318:00 am -
Nonstop1h 05m
Deal found 8/28![Frontier logo]()
$134
This Super.com deal was found by Cheapflights users on 8/27. 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.
Fri 9/252:30 pm -
Nonstop1h 10m
Sat 9/268:00 am -
Nonstop1h 09m
Deal found 8/27![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 8/28. 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.
Fri 10/98:00 am -
Nonstop1h 08m
Mon 10/126:00 am -
Nonstop1h 04m
Deal found 8/28![Frontier logo]()
$136
This Super.com deal was found by Cheapflights users on 8/28. 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 9/295:44 pm -
Nonstop1h 20m
Mon 10/56:00 am -
Nonstop1h 04m
Deal found 8/28![Frontier logo]()
$140
Best flights from Ontario to Las VegasDiscover carefully curated flight deals from Ontario to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
Discover carefully curated flight deals from Ontario to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
This Southwest deal was found by Cheapflights users on 8/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:40 am -
Nonstop1h 00m
Sat 10/317:40 am -
2 stops5h 05m
Deal found 8/31![Southwest logo]()
$232
This United Airlines deal was found by Cheapflights users on 8/27. 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.
Thu 10/11:52 pm -
1 stop6h 55m
Thu 10/83:17 pm -
1 stop5h 14m
Deal found 8/27![United Airlines logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 8/28. 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 10/165:45 pm -
1 stop21h 57m
Wed 10/218:28 am -
2 stops8h 37m
Deal found 8/28![Alaska Airlines logo]()
$303
This Southwest deal was found by Cheapflights users on 9/1. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:40 am -
2 stops5h 55m
Fri 11/65:40 pm -
1 stop4h 00m
Deal found 9/1![Southwest logo]()
$251
This Southwest deal was found by Cheapflights users on 8/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:10 am -
1 stop4h 25m
Sat 10/316:35 am -
2 stops6h 10m
Deal found 8/31![Southwest logo]()
$260
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Mon 9/215:00 am -
1 stop5h 49m
Mon 9/215:07 pm -
1 stop5h 44m
Deal found 8/28![United Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 8/28. 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 10/165:45 pm -
1 stop21h 57m
Tue 10/208:23 pm -
2 stops20h 42m
Deal found 8/28![Alaska Airlines logo]()
$311
This Southwest deal was found by Cheapflights users on 8/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:05 pm -
1 stop3h 30m
Mon 10/124:55 pm -
2 stops5h 15m
Deal found 8/30![Southwest logo]()
$279
This Alaska Airlines deal was found by Cheapflights users on 8/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:45 pm -
1 stop21h 57m
Mon 10/268:23 pm -
2 stops20h 42m
Deal found 8/31![Alaska Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 8/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:00 am -
1 stop7h 25m
Thu 10/13:05 pm -
1 stop5h 53m
Deal found 8/30![United Airlines logo]()
$332
This Southwest deal was found by Cheapflights users on 8/27. 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.
Sat 10/248:55 am -
2 stops8h 05m
Mon 10/267:05 am -
1 stop4h 20m
Deal found 8/27![Southwest logo]()
$288
This Southwest deal was found by Cheapflights users on 8/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:40 pm -
1 stop3h 25m
Sat 9/265:55 am -
2 stops6h 25m
Deal found 8/31![Southwest logo]()
$308
Last-minute flights from Ontario to Las VegasDiscover last-minute flight deals from Ontario to Las Vegas. Data last updated September 1, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Las Vegas. Data last updated September 1, 2026 and is based on user searches.
This deal was found by Cheapflights users on 8/27. 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.
Wed 9/23:40 pm -
Nonstop1h 11m
Thu 9/37:00 am -
Nonstop1h 03m
Deal found 8/27![Frontier logo]()
$131
This CheapOair deal was found by Cheapflights users on 8/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:04 am -
Nonstop1h 14m
Thu 9/173:45 pm -
Nonstop1h 14m
Deal found 8/27![Frontier logo]()
$132
This Booking.com deal was found by Cheapflights users on 8/28. 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 9/178:00 am -
Nonstop1h 02m
Mon 9/216:00 am -
Nonstop1h 04m
Deal found 8/28![Frontier logo]()
$128
This Mytrip deal was found by Cheapflights users on 8/28. 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 9/1910:04 am -
Nonstop1h 14m
Tue 9/228:00 am -
Nonstop1h 09m
Deal found 8/28![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 8/27. 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 9/248:24 pm -
Nonstop1h 11m
Thu 10/13:35 pm -
Nonstop1h 14m
Deal found 8/27![Frontier logo]()
$126
This Super.com deal was found by Cheapflights users on 8/27. 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 9/248:00 am -
Nonstop1h 02m
Mon 9/286:00 am -
Nonstop1h 04m
Deal found 8/27![Frontier logo]()
$127
This Super.com deal was found by Cheapflights users on 8/27. 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.
Fri 9/252:30 pm -
Nonstop1h 10m
Sat 9/268:00 am -
Nonstop1h 09m
Deal found 8/27![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 8/28. 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 9/295:44 pm -
Nonstop1h 20m
Mon 10/56:00 am -
Nonstop1h 04m
Deal found 8/28![Frontier logo]()
$140
This CheapOair deal was found by Cheapflights users on 8/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:30 pm -
Nonstop1h 10m
Sat 10/103:20 pm -
Nonstop1h 10m
Deal found 8/28![Frontier logo]()
$133
This Super.com deal was found by Cheapflights users on 8/28. 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.
Fri 10/98:00 am -
Nonstop1h 08m
Mon 10/126:00 am -
Nonstop1h 04m
Deal found 8/28![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 8/28. 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 10/2810:35 am -
Nonstop1h 07m
Sat 10/318:00 am -
Nonstop1h 05m
Deal found 8/28![Frontier logo]()
$134
One-way flights from Ontario to Las VegasSearch for one-way flight options from Ontario to Las Vegas. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
Search for one-way flight options from Ontario to Las Vegas. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
This Super.com deal was found by Cheapflights users on 8/27. 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 9/225:44 pm -
Nonstop1h 20m
Deal found 8/27![Frontier logo]()
$63
This Super.com deal was found by Cheapflights users on 8/27. 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 9/2910:04 am -
Nonstop1h 14m
Deal found 8/27![Frontier logo]()
$64
This Mytrip deal was found by Cheapflights users on 8/28. 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 9/242:30 pm -
Nonstop1h 10m
Deal found 8/28![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 8/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:23 pm -
Nonstop1h 08m
Deal found 8/27![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 8/28. 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 10/88:35 pm -
Nonstop1h 08m
Deal found 8/28![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 8/27. 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.
Fri 10/98:00 am -
Nonstop1h 08m
Deal found 8/27![Frontier logo]()
$72
This Mytrip deal was found by Cheapflights users on 8/28. 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 10/22:30 pm -
Nonstop1h 10m
Deal found 8/28![Frontier logo]()
$73
This Trip.com deal was found by Cheapflights users on 8/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:35 pm -
Nonstop1h 09m
Deal found 8/27![Frontier logo]()
$75
This Super.com deal was found by Cheapflights users on 8/28. 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 10/1311:26 am -
Nonstop1h 11m
Deal found 8/28![Frontier logo]()
$77
This Frontier deal was found by Cheapflights users on 8/28. 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 10/32:30 pm -
Nonstop1h 10m
Deal found 8/28![Frontier logo]()
$78
This Frontier deal was found by Cheapflights users on 9/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:04 am -
Nonstop1h 14m
Deal found 9/1![Frontier logo]()
$79
Find flight deals from Ontario to Las Vegas
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Las Vegas (LAS). 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 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $126 (Super.com) |
One-way from | $63 (Super.com) |
Popular in | July |
Cheapest in | February |
Average price | $166 |
Good round-trip deal | $184 or less |
Good one-way deal | $146 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Las Vegas 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 1, 2026.
Use the filters below to find and compare flights from Ontario to Las Vegas that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Sat 10/31
5:40 am-6:40 am
Nonstop1h 00m
Las Vegas Harry Reid Intl
Sat 10/31
7:40 am-12:45 pm
2 stops5h 05m
$232
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Wed 10/28
6:40 am-12:35 pm
2 stops5h 55m
Las Vegas Harry Reid Intl
Fri 11/6
5:40 pm-9:40 pm
1 stop4h 00m
$251
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Thu 10/29
6:10 am-10:35 am
1 stop4h 25m
Las Vegas Harry Reid Intl
Sat 10/31
6:35 am-12:45 pm
2 stops6h 10m
$260
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Thu 10/8
7:05 pm-10:35 pm
1 stop3h 30m
Las Vegas Harry Reid Intl
Mon 10/12
4:55 pm-10:10 pm
2 stops5h 15m
$279
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Sat 10/24
8:55 am-5:00 pm
2 stops8h 05m
Las Vegas Harry Reid Intl
Mon 10/26
7:05 am-11:25 am
1 stop4h 20m
$288
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Thu 10/1
1:52 pm-8:47 pm
1 stop6h 55m
Las Vegas Harry Reid Intl
Thu 10/8
3:17 pm-8:31 pm
1 stop5h 14m
$295
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Fri 10/16
5:45 pm-3:42 pm
1 stop21h 57m
Las Vegas Harry Reid Intl
Wed 10/21
8:28 am-5:05 pm
2 stops8h 37m
$303
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Mon 9/21
5:00 am-10:49 am
1 stop5h 49m
Las Vegas Harry Reid Intl
Mon 9/21
5:07 pm-10:51 pm
1 stop5h 44m
$305
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Fri 9/25
2:40 pm-6:05 pm
1 stop3h 25m
Las Vegas Harry Reid Intl
Sat 9/26
5:55 am-12:20 pm
2 stops6h 25m
$308
OntarioLas Vegas
ONT Ontario - LAS Las Vegas Harry Reid Intl
ONTLAS
Ontario
Fri 10/16
5:45 pm-3:42 pm
1 stop21h 57m
Las Vegas Harry Reid Intl
Tue 10/20
8:23 pm-5:05 pm
2 stops20h 42m
$311
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Ontario to Las Vegas
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 Ontario to Las Vegas in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| 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 Ontario-Las Vegas flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Las Vegas flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Las Vegas flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Las Vegas 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 Ontario-Las Vegas 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 Ontario to Las Vegas
Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Ontario with our price prediction graph.
ONT-LAS
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.
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Everything you need to know about your flight from Ontario to Las Vegas
Prices
Airlines
Delays
How far ahead should I book a flight from Ontario to Las Vegas?
The price you pay for your flight from Ontario to Las Vegas may vary depending on when you book. For the best chance of a lower fare, look to book 57 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Ontario to Las Vegas?
Currently, February is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of $109). Flying from Ontario to Las Vegas in July is currently the most expensive (average of $213). 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 ONT to LAS?
Find hourly flight availability from Ontario to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 1, 2026.
A simple way to save on the total cost of your ticket is to fly from Ontario to Las Vegas at noon. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight in the afternoon.
What is the cheapest day to fly from Ontario to Las Vegas?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Las Vegas. Price data was last updated on August 29, 2026.
Travelers seeking maximum savings on their Ontario to Las Vegas flight should consider departing on Saturday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Ontario to Las Vegas delayed?
About 16% of weekly flights between Ontario and Las Vegas have experienced delays in the past year, with the average delay time being 104 minutes.
What is the most punctual flight time for Ontario to Las Vegas flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Ontario to Las Vegas flights?
Over the last year, Frontier have had the lowest number of delays on this route, with just 12% of flights being delayed.
The best insider tips for Ontario to Las Vegas 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 Ontario to Las Vegas trip
Our travel experts
Reviews of airlines servicing Las Vegas
Get insights into the airlines that provide service to Las Vegas. 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 Las Vegas. Reviews last updated September 1, 2026.
Peruse reviews from past customers who have flown with Southwest,JetBlue, andFrontier from Ontario to Las Vegas to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Ontario to Las Vegas. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Las Vegas?
Book flights to Las Vegas if you plan to visit one of these locationsParadise
Mesquite
Henderson
Kingman
Boulder City
North Las Vegas
Needles
Winchester
Sunrise Manor
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Search flights from Ontario to Las Vegas by cabin class
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Other flights to Las Vegas
Explore flights to Las Vegas departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 1, 2026.
Ontario and Las Vegas flights
Browse other Ontario and Las Vegas flight options. Last updated on September 1, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 1, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Ontario to Las Vegas
Discover the top 3 airlines that operate flights from Ontario to Las Vegas. 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 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$56 | Average$150 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$144 | Average$279 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$200 | Average$289 | FlexibilityNo cancel fee | On-time62% |