€121 Cheap Flights Ontario to Las Vegas (ONT-LAS)

View €121 flight on Mon, 8 Dec 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Intl. Airport (LAS)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 15% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at €121 for one-way flights and €232 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€232 Return, found 6 days ago
€232
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €232 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€255 Return, found 6 days ago
€255
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €255 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€272 Return, found 6 days ago
€272
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €272 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€276 Return, found 6 days ago
€276
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €276 found 6 days ago
Delta
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€279 Return, found 6 days ago
€279
Return
found 6 days ago
Select Delta flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €279 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€283 Return, found 6 days ago
€283
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €283 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€295 Return, found 6 days ago
€295
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €295 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€298 Return, found 6 days ago
€298
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €298 found 6 days ago
American Airlines
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€303 Return, found 6 days ago
€303
Return
found 6 days ago
Select American Airlines flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €303 found 6 days ago
United
Mon, 9 Feb - Thu, 19 Feb
ONT
Ontario
LAS
Las Vegas
€351 Return, found 6 days ago
€351
Return
found 6 days ago
Select United flight, departing Mon, 9 Feb from Ontario to Las Vegas, returning Thu, 19 Feb, priced at €351 found 6 days ago

Find the cheapest month to fly from Ontario (ONT) to Las Vegas (LAS)

October is typically the cheapest month to fly

From €42 - €74 per traveller.

Frequently asked questions

How much is a flight from Ontario Airport to LAS?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip flight between Ontario Airport and LAS was €232. Cheap fares don't stick around for long, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Ontario Airport to Harry Reid Airport (formerly McCarran Airport)?
This can vary between air carriers, as each has its own set of terms and conditions. Head to the Customer Service Portal, where there are easy-to-follow instructions on how to cancel online.
How do I find cheap flights from ONT to Harry Reid Airport (formerly McCarran Airport) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Ontario Airport to LAS flights, you'll see a "no change fees" filter for you to select.
How far is the flight from ONT to LAS?
It's just 320 kilometres between Ontario and Las Vegas. It's quite possible that you'll spend more time travelling to and from the airport than you will actually flying!
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Airport (formerly McCarran Airport)?
Southwest Airlines (WN) is one of the preferred choices for travellers jetting between Ontario Airport and LAS. Take your pick of the 143 flights it operates on this route each month. Frontier Airlines (F9) is also worth considering. It offers 56 flights every month. Between these two airlines, you'll be able to find a great deal from Ontario to Las Vegas.
Are Los Angeles - Ontario Intl. Airport (ONT) to Harry Reid Airport (formerly McCarran Airport) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from ONT to Harry Reid Airport (formerly McCarran Airport) at the last minute could be your ticket to a great deal. However, it could end up costing you a whole lot more! If you'd prefer to err on the side of caution, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to a year in advance. If your preferred carrier hasn't released tickets yet, check back frequently as deals are updated on Expedia all the time.

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Harry Reid Intl.
Return price
€231
Distance
314 km
Average flight time
1 hour 5 mins

Book with confidence

Perfect flights from Ontario to Las Vegas

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Ontario to Las Vegas. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Los Angeles - Ontario Intl. to Harry Reid Intl. ticket options cater to your travel preferences, with incredible one-way fares from €121 and roundtrip prices from €232. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Harry Reid Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Las Vegas.
Perfect flights from Ontario to Las Vegas

Explore a world of travel with Expedia

*Available to Expedia members.