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Ontario

$37+ Cheap flights from Las Vegas to Ontario (LAS - ONT)

LAS — ONT
Dec 9 — Dec 161
Wed 12/9
Wed 12/16
1 adult, Economy
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Cheap flight deals from Las Vegas to Ontario

Cheapest flights from Las Vegas to Ontario

Wed 12/236:01 am -
Nonstop1h 06m
Wed 12/3010:48 pm -
Nonstop1h 04m
Deal found 11/7$37
Tue 12/15:02 pm -
Nonstop1h 09m
Tue 12/811:00 am -
Nonstop1h 10m
Deal found 11/4$38
Wed 12/25:02 pm -
Nonstop1h 09m
Fri 12/1111:00 am -
Nonstop1h 10m
Deal found 11/9$40
Sat 12/1210:45 am -
Nonstop1h 06m
Mon 12/1411:00 am -
Nonstop1h 10m
Deal found 11/5$42
Sat 12/510:45 am -
Nonstop1h 06m
Thu 12/1011:00 am -
Nonstop1h 10m
Deal found 11/4$43
Fri 12/1110:45 am -
Nonstop1h 06m
Sun 12/138:44 am -
Nonstop1h 06m
Deal found 11/9$45
Fri 12/45:02 pm -
Nonstop1h 09m
Wed 12/911:00 am -
Nonstop1h 10m
Deal found 11/7$46
Sat 12/196:12 am -
Nonstop1h 06m
Sun 12/2010:33 pm -
Nonstop1h 04m
Deal found 11/8$47
Fri 12/411:42 am -
Nonstop1h 18m
Sat 12/511:00 am -
Nonstop1h 10m
Deal found 11/5$49

Find flight deals from Las Vegas to Ontario

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$37
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$138

Good round-trip deal

$121 or less

Good one-way deal

$122 or less
Provider with most accurate pricing for Las Vegas Harry Reid Intl-Ontario flight deals.
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Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Ontario flights.
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From Las Vegas Harry Reid Intl to Ontario
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Ontario.
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Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Ontario.
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Cheapflights Fare Finder

 
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

Price

Cheapest round-trip

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Thu 12/31

2:05 pm-5:40 pm

1 stop3h 35m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$74

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Thu 12/17

7:10 am-10:45 am

1 stop3h 35m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$74

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Sun 12/20

7:50 am-12:25 pm

1 stop4h 35m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$74

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Tue 12/1

2:05 pm-5:40 pm

1 stop3h 35m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$74

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Thu 1/7

3:55 pm-7:50 pm

1 stop3h 55m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$74

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Thu 11/26

9:50 am-4:50 pm

1 stop7h 00m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$74

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Tue 12/8

3:54 pm-11:23 pm

1 stop7h 29m

Ontario

Thu 12/10

8:44 am-9:50 am

Nonstop1h 06m

$81

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Mon 11/23

6:10 am-10:50 am

1 stop4h 40m

Ontario

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$124
Quickest round-trip

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Mon 12/14

6:45 am-7:45 am

Nonstop1h 00m

Ontario

Mon 12/21

1:00 pm-2:05 pm

Nonstop1h 05m

$127

Las VegasOntario

LAS Las Vegas Harry Reid Intl - ONT Ontario

LASONT

Las Vegas Harry Reid Intl

Sun 12/6

8:55 pm-10:00 pm

Nonstop1h 05m

Ontario

Mon 12/7

1:30 pm-2:35 pm

Nonstop1h 05m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/8

Showing 1-10 of 22 resultsSorted by cheapest first
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Compare providers for flights from Las Vegas to Ontario

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Super.comPrice Accuracy-Trust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
GotogatePrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Las Vegas to Ontario

What is the cheapest month to book a flight from Las Vegas to Ontario?

Currently, January is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $78). Flying from Las Vegas to Ontario in June is currently the most expensive (average of $330). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LAS to ONT?

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 afternoon, which can drop the price by up to 27% versus a flight at noon.

What is the cheapest day to fly from Las Vegas to Ontario?

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.

How much does it cost to fly round-trip from Las Vegas to Ontario?

Airfare is below average for this route at the moment.

Las Vegas to Ontario flights typically cost between $109 and $214 in December.
The cheapest round-trip price found within the last 5 days was $37 on Frontier (Dec 23-Dec 30).

The best insider tips for Las Vegas to Ontario flights

Cheapflights partnered with top experts to bring you the best recommendations for your Las Vegas to Ontario trip
Our travel experts
Bill Fink

Bill Fink

Expert on ONT

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LAS

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Ontario

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.
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Entertainment

7.4

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Southwest
8.0
Very good
4,219 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Entertainment

7.4

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!
Frontier
5.5
Fair
2,506 reviews
Southwest
8.0
Very good
4,219 reviews

Crew

8.6

Entertainment

7.4

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Related info for your journey

  • What airports do I use to fly from Las Vegas to Ontario?

    If you wish to fly to Ontario from Las Vegas, then you need to book flights from Las Vegas Harry Reid Intl to Ontario. There are 6 flights from Harry Reid Intl (LAS) to Ontario (ONT) per day to choose from. Flights to Ontario from Harry Reid Intl are available from 2 different airlines, which means you should have some options if you want to compare airfare deals. 1h 05m is how long a nonstop flight from Las Vegas to Ontario typically takes.

  • How popular is this Las Vegas to Ontario flight route?

    Within the past month, 26 users have taken a look at flights from Las Vegas Harry Reid Intl to Ontario.

  • How long is the flight from Las Vegas to Ontario?

    There are many flights that can get you from Las Vegas to Ontario in 1h. Fly via Frontier or Southwest to get the fastest option. The distance between Las Vegas and Ontario is about 197 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Las Vegas to Ontario round-trip?

    Cheapflights users have booked flights from Las Vegas to Ontario round-trip from $56. Another airline that can offer you cheap pricing is Southwest. You may be able to fly from Las Vegas to Ontario for 73% less than the average price by searching for these airlines.

  • What are the most reliable airlines from Las Vegas to Ontario?

    The top 3 most reliable airlines when flying from Las Vegas to Ontario are Volaris (90%), Frontier (88%) and Southwest (70%).

  • What are the cheapest flights from Las Vegas to Ontario?

    On average you can expect to pay $211 for a flight from Las Vegas to Ontario. The cheapest flight overall is $49 while the most popular route, (Las Vegas Harry Reid Intl - Ontario) is currently priced at $38.

  • Can I find deals for flights from Las Vegas to Ontario that include hotel bookings?

    Yes. In addition to deals on Las Vegas to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Las Vegas to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Las Vegas to Ontario.

  • Can I find deals for business class flights from Las Vegas to Ontario?

    Yes. Cheapflights offers flight deals from Las Vegas to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Las Vegas to Ontario?

    Currently, January is the cheapest month in which you can book a flight from Las Vegas to Ontario (average of $78). Flying from Las Vegas to Ontario in June is currently the most expensive (average of $330). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Las Vegas to Ontario

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$148FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$167Average$320FlexibilityNo cancel feeOn-time63%

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