ONT - LAS

Find cheap flights from Ontario to Las Vegas

1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Las Vegas

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Las Vegas, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Las Vegas, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheap Flight Deals from Ontario to Las Vegas (ONT-LAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Las Vegas that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Ontario to Las Vegas

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Las Vegas.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Multiple Airlines Logo
ONT-LAS
510 kmmulti-stop
Multiple Airlines Logo
LAS-ONT
510 kmmulti-stop
Multiple Airlines
Find Deal

Expert advice for your flight from Ontario to Las Vegas

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are specific to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Southwest

Southwest offers two free checked bags up to 50 pounds each, ideal for family travel.


Use EarlyBird Check-In for a better boarding position, avoiding middle seats.

Read more about Southwestby Blane Bachelor
Frontier

Frontier's Economy Bundle includes a carry-on bag and seat selection, offering budget-friendly options.


Avoid Basic Fare to prevent extra fees for carry-ons and seat selection.

Read more about Frontierby Stefanie Waldek
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

KAYAK's insights & trends for Ontario to Las Vegas flights

Get data-powered insights and trends into flights from Ontario to Las Vegas to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Las Vegas, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ontario to Las Vegas is October, where tickets cost C$ 108 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is C$ 144 and C$ 137 respectively.

Can I save money by flying with a layover from Ontario to Las Vegas?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of C$ 155, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Las Vegas, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Ontario to Las Vegas, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low season

February

High season

August
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly (2% more expensive on average)

When to book flights from Ontario to Las Vegas

Are your dates flexible? Find out the best times to travel from Ontario to Las Vegas based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Las Vegas

  • Is it possible to book direct flights from Ontario to Las Vegas?

    There are many direct flights between Ontario and Las Vegas that are offered each day and these are typically operated by Frontier Airlines. Quite a few flights require passengers to have a layover as well, and you will find that these are usually serviced by Alaska Airlines or American Airlines.

  • How can I travel from downtown Ontario to Ontario International Airport?

    An easy way to get to Ontario International Airport from the city center is by driving or taking a taxi, which will generally take around 10 to 15min depending on what traffic is like at the time. You can also take public transportation, such as bus line 61, which will take you between 15 and 20min on average.

  • What transportation options are there for going from Harry Reid International Airport to downtown Las Vegas?

    To head to downtown Las Vegas once you have landed at Harry Reid International Airport, you can always drive or take a taxi, which will normally take you 20 to 25min. Public transportation is also an option, and bus line CX will bring you to the city center in approximately 45 to 50min.

  • What services are available for passengers with reduced mobility?

    There are employees at Ontario International Airport that are ready to help passengers with limited mobility through security, to their gate, and while boarding the plane. Free wheelchairs are also available for anyone in need. At both Ontario International Airport and Harry Reid International Airport, there are also elevators and ramps, as well as public restrooms that are accessible for individuals with reduced mobility.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Las Vegas?

    Alaska Airlines, Delta, American Airlines, JetBlue, and Hawaiian Airlines offer inflight Wi-Fi service on the Ontario to Las Vegas flight route.

  • Which aircraft models fly most regularly from Ontario to Las Vegas?

    The Airbus A320neo is the aircraft model that flies most regularly on the Ontario to Las Vegas flight route.

  • On which days can I fly direct from Ontario to Las Vegas?

    There are direct flights from Ontario to Las Vegas on a daily basis.

  • How does KAYAK find such low prices on flights from Ontario to Las Vegas?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Las Vegas.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Las Vegas?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Las Vegas?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Las Vegas with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Las Vegas?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Las Vegas from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Ontario to Las Vegas

  • Those that will be traveling with small children will want to keep in mind that Ontario International Airport (ONT) has two baby care rooms that can be found in terminals 2 and 4. These rooms are equipped with changing tables, outlets, comfortable seating, trash cans, running water, and doors that lock.
  • If you’re flying with a dog, you most likely will want to give them the opportunity to stretch their legs after your flight has landed at Harry Reid International Airport (LAS). Head to one of the designated outdoor pet relief areas that are located just outside terminals 1 and 3.
  • Travelers that have some time to kill before their flight departs from Ontario International Airport can always relax in the Escape Lounge. This lounge has multiple locations, found in terminals 2 and 4, and passengers of all airlines can purchase entry tickets.
  • To rent a car once you have landed at Harry Reid International Airport, head to the McCarran Rent-A-Car Center, which you can go to from the airport by taking one of the free blue and white shuttle buses. At this center, you will find offices for several companies, including Alamo, Budget, and Hertz.
  • While there are no hotels directly at Ontario International Airport, there are a few nearby lodging options if you happen to have a flight that departs early in the morning. For example, the Candlewood Suites Ontario Convention Center is around a 5min drive away and has a free airport shuttle for guests.
See more tips

Prefer to fly direct from Ontario to Las Vegas?

Find which airlines fly direct from Ontario Airport to Las Vegas Harry Reid Intl Airport, which days they fly and book direct flights.

Direct departures

Ontario to Las Vegas Harry Reid Intl

Monday

Frontier,Southwest

Frontier,Southwest

Tuesday

Frontier,Southwest

Frontier,Southwest

Wednesday

Frontier,Southwest

Frontier,Southwest

Thursday

Frontier,Southwest

Frontier,Southwest

Friday

Frontier,Southwest

Frontier,Southwest

Saturday

Frontier,Southwest

Frontier,Southwest

Sunday

Frontier,Southwest

Frontier,Southwest

See more nonstop flights

Direct returns

Las Vegas Harry Reid Intl to Ontario

Monday

Frontier,Southwest

Frontier,Southwest

Tuesday

Frontier,Southwest

Frontier,Southwest

Wednesday

Frontier,Southwest

Frontier,Southwest

Thursday

Frontier,Southwest

Frontier,Southwest

Friday

Frontier,Southwest

Frontier,Southwest

Saturday

Frontier,Southwest

Frontier,Southwest

Sunday

Frontier,Southwest

Frontier,Southwest

See more nonstop flights
See more nonstop flights

Top airline flying from Ontario to Las Vegas

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Las Vegas. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Las Vegas? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
5.9
FrontierOverall score based on 3283 reviews
4.6Entertainment
5.6Comfort
4.8Food
6.2Boarding
6.8Crew
Airline reviews

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

2.0 MediocreAnonymous, Apr 2025LAX - PDX
Read more Frontier reviews

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

Landing in terminal 2, but my luggage is terminal 3. We (and others) were looking for it in terminal 1. We probably missed the crew broadcast, but the communication could have been clearer for non native (or elderly) passengers.

I was not permitted on my flight and had to purchase another flight ticket to Las Vegas.

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

Better to put road truck seat in plain it so uncomfortable can not adjustable and fill metal don’t have cushions at all it’s very hard to travel for five hours

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.