$40+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — ONT
Jul 4 — Jul 111
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 September, booked 51 days in advance, depart on a Wednesday or Friday and return on a Sunday
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 June 4, 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 June 4, 2026.
This Priceline deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:00 pm
LAS
- ONT
Nonstop1h 10m
Frontier
Wed 11/412:57 pm
ONT
- LAS
Nonstop1h 09m
Frontier
Deal found 6/3![Frontier logo]()
$56
This Frontier deal was found by Cheapflights users on 5/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/173:00 pm
LAS
- ONT
Nonstop1h 10m
Frontier
Wed 11/1812:57 pm
ONT
- LAS
Nonstop1h 09m
Frontier
Deal found 5/31![Frontier logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:00 pm
LAS
- ONT
Nonstop1h 10m
Frontier
Wed 11/1112:57 pm
ONT
- LAS
Nonstop1h 09m
Frontier
Deal found 6/3![Frontier logo]()
$60
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/11:56 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Wed 9/21:27 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/3![Frontier logo]()
$61
This Frontier deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/231:55 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Wed 6/241:33 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/2![Frontier logo]()
$62
This iWofly deal was found by Cheapflights users on 6/1. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:43 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Wed 7/83:40 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/1![Frontier logo]()
$64
This Super.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:55 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Tue 7/73:40 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/2![Frontier logo]()
$66
This Frontier deal was found by Cheapflights users on 6/1. 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.
Tue 6/236:43 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Wed 7/13:34 pm
ONT
- LAS
Nonstop1h 12m
Frontier
Deal found 6/1![Frontier logo]()
$67
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:45 pm
LAS
- ONT
Nonstop1h 09m
Frontier
Mon 10/59:49 pm
ONT
- LAS
Nonstop1h 09m
Frontier
Deal found 6/3![Frontier logo]()
$71
This Frontier deal was found by Cheapflights users on 6/1. 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.
Thu 10/159:10 am
LAS
- ONT
Nonstop1h 11m
Frontier
Tue 10/2011:16 am
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/1![Frontier logo]()
$72
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 June 4, 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 June 4, 2026.
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:45 am
LAS
- ONT
1 stop5h 05m
Southwest
Wed 7/155:45 pm
ONT
- LAS
1 stop4h 40m
Southwest
Deal found 6/3![Southwest logo]()
$177
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:13 pm
LAS
- ONT
1 stop5h 24m
United Airlines
Wed 6/246:39 pm
ONT
- LAS
1 stop4h 31m
United Airlines
Deal found 6/1![United Airlines logo]()
$247
This Southwest deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:50 am
LAS
- ONT
1 stop4h 35m
Southwest
Wed 7/87:20 pm
ONT
- LAS
1 stop3h 50m
Southwest
Deal found 6/2![Southwest logo]()
$177
This Southwest deal was found by Cheapflights users on 6/1. 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.
Tue 6/3012:45 pm
LAS
- ONT
2 stops5h 50m
Southwest
Tue 7/75:45 pm
ONT
- LAS
1 stop3h 35m
Southwest
Deal found 6/1![Southwest logo]()
$182
This Southwest deal was found by Cheapflights users on 5/30. 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.
Mon 7/136:10 am
LAS
- ONT
1 stop4h 20m
Southwest
Tue 7/147:20 pm
ONT
- LAS
1 stop3h 50m
Southwest
Deal found 5/30![Southwest logo]()
$233
This Southwest deal was found by Cheapflights users on 5/31. 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.
Sun 6/215:05 am
LAS
- ONT
1 stop4h 00m
Southwest
Tue 6/234:05 pm
ONT
- LAS
1 stop5h 25m
Southwest
Deal found 5/31![Southwest logo]()
$253
This KAYAK deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2410:55 pm
LAS
- ONT
Nonstop1h 00m
Southwest
Wed 11/259:30 pm
ONT
- LAS
Nonstop1h 05m
Southwest
Deal found 6/2![Southwest logo]()
$290
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/195:05 am
LAS
- ONT
1 stop4h 00m
Southwest
Sun 7/264:50 pm
ONT
- LAS
2 stops5h 15m
Southwest
Deal found 6/3![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 5/31. 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 7/244:45 pm
LAS
- ONT
2 stops4h 50m
Southwest
Mon 7/278:00 am
ONT
- LAS
1 stop4h 15m
Southwest
Deal found 5/31![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 5/31. 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 11/77:40 am
LAS
- ONT
1 stop3h 40m
Southwest
Sat 11/71:10 pm
ONT
- LAS
2 stops6h 00m
Southwest
Deal found 5/31![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/24:45 pm
LAS
- ONT
2 stops4h 45m
Southwest
Thu 7/166:30 am
ONT
- LAS
1 stop4h 10m
Southwest
Deal found 6/2![Southwest logo]()
$294
This Southwest deal was found by Cheapflights users on 5/31. 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 7/104:45 pm
LAS
- ONT
2 stops4h 50m
Southwest
Sun 7/124:50 pm
ONT
- LAS
2 stops5h 15m
Southwest
Deal found 5/31![Southwest logo]()
$299
Last-minute flights from Las Vegas to OntarioDiscover last-minute flight deals from Las Vegas to Ontario. Data last updated June 4, 2026 and is based on user searches.
Discover last-minute flight deals from Las Vegas to Ontario. Data last updated June 4, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/181:55 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Tue 6/233:34 pm
ONT
- LAS
Nonstop1h 12m
Frontier
Deal found 6/2![Frontier logo]()
$116
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/206:43 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Wed 6/243:34 pm
ONT
- LAS
Nonstop1h 12m
Frontier
Deal found 6/3![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/226:43 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Wed 6/241:33 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/2![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/231:55 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Wed 6/241:33 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/2![Frontier logo]()
$62
This Frontier deal was found by Cheapflights users on 6/1. 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.
Tue 6/236:43 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Wed 7/13:34 pm
ONT
- LAS
Nonstop1h 12m
Frontier
Deal found 6/1![Frontier logo]()
$67
This Super.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:55 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Tue 7/73:40 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/2![Frontier logo]()
$66
This iWofly deal was found by Cheapflights users on 6/1. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:43 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Wed 7/83:40 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/1![Frontier logo]()
$64
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/302:45 pm
LAS
- ONT
Nonstop1h 09m
Frontier
Sun 8/23:40 pm
ONT
- LAS
Nonstop1h 11m
Frontier
Deal found 6/4![Frontier logo]()
$88
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:00 am
LAS
- ONT
Nonstop1h 03m
Frontier
Sun 8/211:52 am
ONT
- LAS
Nonstop1h 10m
Frontier
Deal found 6/4![Frontier logo]()
$87
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 June 4, 2026.
Search for one-way flight options from Las Vegas to Ontario. Find affordable one-way fares based on user searches. Data last updated June 4, 2026.
This Frontier deal was found by Cheapflights users on 6/1. 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.
Sat 9/123:00 pm
LAS
- ONT
Nonstop1h 10m
Frontier
Deal found 6/1![Frontier logo]()
$40
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:40 pm
LAS
- ONT
Nonstop1h 08m
Frontier
Deal found 6/3![Frontier logo]()
$43
This Frontier deal was found by Cheapflights users on 6/1. 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.
Mon 10/59:10 am
LAS
- ONT
Nonstop1h 11m
Frontier
Deal found 6/1![Frontier logo]()
$44
This Frontier deal was found by Cheapflights users on 6/1. 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.
Sat 8/291:56 pm
LAS
- ONT
Nonstop1h 13m
Frontier
Deal found 6/1![Frontier logo]()
$45
This Super.com deal was found by Cheapflights users on 6/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/222:05 pm
LAS
- ONT
Nonstop1h 09m
Frontier
Deal found 6/1![Frontier logo]()
$47
This CheapOair deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:00 am
LAS
- ONT
Nonstop1h 03m
Frontier
Deal found 6/3![Frontier logo]()
$49
This Kissandfly.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/257:00 am
LAS
- ONT
Nonstop1h 03m
Frontier
Deal found 6/2![Frontier logo]()
$56
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/73:00 pm
LAS
- ONT
Nonstop1h 10m
Frontier
Deal found 6/3![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:30 pm
LAS
- ONT
1 stop23h 23m
Frontier
Deal found 6/3![Frontier logo]()
$62
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2012:59 am
LAS
- ONT
1 stop9h 05m
Frontier
Deal found 6/3![Frontier logo]()
$68
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/183:00 pm
LAS
- ONT
Nonstop1h 10m
Frontier
Deal found 6/4![Frontier logo]()
$76
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 June 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $56 (Priceline) |
One-way from | $40 (CheapOair) |
Popular in | March |
Cheapest in | January |
Average price | $146 |
Good round-trip deal | $141 or less |
Good one-way deal | $112 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 June 4, 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 - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 7/7
5:45 am-10:50 am
1 stop5h 05m
Ontario
Wed 7/15
5:45 pm-10:25 pm
1 stop4h 40m
$177
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 7/7
7:50 am-12:25 pm
1 stop4h 35m
Ontario
Wed 7/8
7:20 pm-11:10 pm
1 stop3h 50m
$177
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 6/30
12:45 pm-6:35 pm
2 stops5h 50m
Ontario
Tue 7/7
5:45 pm-9:20 pm
1 stop3h 35m
$182
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Mon 7/13
6:10 am-10:30 am
1 stop4h 20m
Ontario
Tue 7/14
7:20 pm-11:10 pm
1 stop3h 50m
$233
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 6/23
5:13 pm-10:37 pm
1 stop5h 24m
Ontario
Wed 6/24
6:39 pm-11:10 pm
1 stop4h 31m
$247
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Sun 6/21
5:05 am-9:05 am
1 stop4h 00m
Ontario
Tue 6/23
4:05 pm-9:30 pm
1 stop5h 25m
$253
Quickest round-trip
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Tue 11/24
10:55 pm-11:55 pm
Nonstop1h 00m
Ontario
Wed 11/25
9:30 pm-10:35 pm
Nonstop1h 05m
$290
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Sun 7/19
5:05 am-9:05 am
1 stop4h 00m
Ontario
Sun 7/26
4:50 pm-10:05 pm
2 stops5h 15m
$294
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Fri 7/24
4:45 pm-9:35 pm
2 stops4h 50m
Ontario
Mon 7/27
8:00 am-12:15 pm
1 stop4h 15m
$294
Las VegasOntario
LAS - ONT
LASONT
Las Vegas Harry Reid Intl
Sat 11/7
7:40 am-11:20 am
1 stop3h 40m
Ontario
Sat 11/7
1:10 pm-7:10 pm
2 stops6h 00m
$294
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*3 stars | |
| 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
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 $87). Flying from Las Vegas to Ontario in March is currently the most expensive (average of $186). 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 June 4, 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 40% 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 May 30, 2026.
Travelers seeking maximum savings on their Las Vegas to Ontario flight should consider departing on Tuesday at noon when fares are most often at their lowest. Tuesday mornings 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 June 4, 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
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
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.
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Alternative routes for Las Vegas to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
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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 June 4, 2026.
Las Vegas and Ontario flights
Browse other Las Vegas and Ontario flight options. Last updated on June 4, 2026.
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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 June 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$53 | Average$107 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$97 | Average$308 | FlexibilityNo cancel fee | On-time63% |