HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Las Vegas

$20+ 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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAS
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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.

The best prices from Ontario to Las Vegas Harry Reid Intl are usually found in January or April, booked 90 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap 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 November 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

February

Cheapest in

January

Round-trip from

$48
(Frontier)

One-way from

$22
(Mytrip)
Provider with most accurate pricing for Ontario-Las Vegas Harry Reid Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Las Vegas Harry Reid Intl flights.
Search Deals
High demand for flights, 28% potential price rise
Search Deals
Best time to find cheap flights, 23% potential price drop
Search Deals
From Ontario to Las Vegas Harry Reid Intl
Search Deals
One-way flight from Ontario to Las Vegas Harry Reid Intl
Search Deals

Find flight deals from Ontario to Las Vegas

Cheapest flights from Ontario to Las Vegas
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 November 20, 2024.

This Cheapflightsfares deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2410:39 pmONT - LAS
Nonstop1h 20mFrontier
Thu 12/267:00 amLAS - ONT
Nonstop1h 06mFrontier
Deal found 11/19$48
This eDestinos deal was found by Cheapflights users on 11/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2110:40 pmONT - LAS
Nonstop1h 15mMultiple Airlines
Sun 11/2410:28 pmLAS - ONT
1 stop13h 54mMultiple Airlines
Deal found 11/18$197

Find flights from Ontario to Las Vegas within your budget

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 2,629,791 searches. Data last updated November 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 12/24

10:39 pm-11:59 pm

Nonstop1h 20m

Las Vegas Harry Reid Intl

Thu 12/26

7:00 am-8:06 am

Nonstop1h 06m

$48

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 11/26

10:40 pm-11:55 pm

Nonstop1h 15m

Las Vegas Harry Reid Intl

Thu 11/28

8:00 am-12:04 am

2 stops16h 04m

$194

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 12/18

2:33 pm-3:45 pm

Nonstop1h 12m

$20

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Sun 12/15

8:25 pm-9:30 pm

Nonstop1h 05m

$94

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Tue 12/17

9:55 am-3:51 pm

1 stop5h 56m

$99

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Thu 12/5

9:11 am-9:48 pm

2 stops12h 37m

$112

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Wed 1/8

6:00 am-3:50 pm

2 stops9h 50m

$136

OntarioLas Vegas

ONT - LAS

ONTLAS

Ontario

Mon 1/13

10:47 am-8:17 pm

2 stops9h 30m

$188

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy2 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 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.
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.

Travel insights for flights from Ontario to Las Vegas

Get recent, data-driven insights about flights from Ontario to Las Vegas including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to Las Vegas?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Las Vegas. Price data was last updated on November 15, 2024.

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 90 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, August is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of $198). Flying from Ontario to Las Vegas in May is currently the most expensive (average of $256). 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 November 20, 2024.

A simple way to save on the total cost of your ticket is to fly from Ontario to Las Vegas in the evening. If you’re flexible enough to do this you can expect to save up to 8% on your trip compared to booking a flight at noon.

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 November 18, 2024.

Travelers seeking maximum savings on their Ontario to Las Vegas flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Las Vegas ranges from 0.1 - 0.8 inches per month. February is typically the wettest month, when rainfall can reach 0.8 in. May is typically the driest time to visit Las Vegas when rainfall is around 0.1 in.

Temperature in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Las Vegas, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 93.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 November 20, 2024.
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Alaska Airlines
8.0
Very good
9,461 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Frontier
6.1
Okay
3,539 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Comfort

8.1

Overall

8.1

Food

7.2

Boarding

8.2

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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.

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

    Las Vegas Harry Reid Intl is the airport most travelers will use when flying to Las Vegas from Ontario. Booking flights from Ontario (ONT) to Harry Reid Intl (LAS) should be relatively easy as there are 5 daily flights to Las Vegas from 7 different airlines. 1h 01m is how long a flight from Ontario to Las Vegas Harry Reid Intl will take if you book a nonstop flight.

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

    The Ontario to Las Vegas Harry Reid Intl flight path was viewed by 264 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What is the cheapest airline to fly from Ontario to Las Vegas round-trip?

    Currently priced at $48, Frontier will fly you from Ontario to Las Vegas and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Users have found that Frontier is 48% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Ontario to Las Vegas one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $22. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Ontario to Las Vegas for a low price.

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

    Looking for the cheapest flight from Ontario to Las Vegas? While on average our users pay $135, our data indicates the cheapest price to be $23. The most popular route (Ontario - Las Vegas Harry Reid Intl), is priced around $37.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Las Vegas 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 Ontario to Las Vegas?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Las Vegas (average of $198). Flying from Ontario to Las Vegas in May is currently the most expensive (average of $256). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Las Vegas

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Las Vegas flights
San Francisco to Las Vegas flights
Santa Ana to Las Vegas flights
Oakland to Las Vegas flights
Burbank to Las Vegas flights
San Jose to Las Vegas flights
San Diego to Las Vegas flights
Sacramento to Las Vegas flights
Los Angeles to Reno flights
Fresno to Las Vegas flights
Stockton to Las Vegas flights
Santa Rosa to Las Vegas flights
Reno to Las Vegas flights
Burbank to Reno flights
Ontario to Reno flights
Santa Ana to Reno flights
Long Beach to Las Vegas flights
Las Vegas to Reno flights
Palm Springs to Las Vegas flights
San Francisco to Reno flights
Oakland to Reno flights
San Diego to Reno flights
Long Beach to Reno flights
San Luis Obispo to Las Vegas flights
San Jose to Reno flights
Santa Barbara to Las Vegas flights
Sacramento to Reno flights
Medford to Las Vegas flights
Monterey to Las Vegas flights
Bakersfield to Las Vegas flights
Fresno to Reno flights
Palm Springs to Reno flights
Santa Monica to Las Vegas flights
Santa Rosa to Reno flights
Santa Barbara to Reno flights
Redding to Las Vegas flights
San Luis Obispo to Reno flights
Concord to Las Vegas flights
Arcata to Las Vegas flights
Santa Maria to Las Vegas flights
Monterey to Reno flights
Tijuana to Las Vegas flights
Medford to Reno flights
Bakersfield to Reno flights
Yuma to Las Vegas flights
Los Angeles to Twin Falls flights
San Francisco to Elko flights
Yuma to Reno flights
Tijuana to Reno flights

Top 7 airlines flying from Ontario to Las Vegas

Discover the top 7 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$37Average$76FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$38Average$208FlexibilityNo cancel feeOn-time75%
FrontierCheapest$40Average$90FlexibilityNo cancel feeOn-time62%
DeltaCheapest$55Average$113FlexibilityNo cancel feeOn-timeN/A
Ravn AlaskaCheapest$86Average$134FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$176Average$246FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$199Average$458FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines