Cheap Flights from Ontario (ONT) to Las Vegas (LAS)

View AU$138 flight on Wed, 6 Aug. 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 35% on select hotels after you book a flight*
  • payments icon
    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 AU$138 for one-way flights and AU$307 for return, for the period specified. Prices and availability are subject to change. Additional terms apply.
American Airlines
Tue., 1 Jul. - Sat., 5 Jul.
ONT
Ontario
LAS
Las Vegas
AU$307
Return
Found 4 days ago
Select American Airlines flight, departing Tue., 1 Jul. from Ontario to Las Vegas, returning Sat., 5 Jul., priced at AU$307 Found 4 days ago
American Airlines
Sun., 6 Jul. - Thu., 10 Jul.
ONT
Ontario
LAS
Las Vegas
AU$353
Return
Found 3 days ago
Select American Airlines flight, departing Sun., 6 Jul. from Ontario to Las Vegas, returning Thu., 10 Jul., priced at AU$353 Found 3 days ago
American Airlines
Thu., 26 Feb. - Fri., 27 Feb.
ONT
Ontario
LAS
Las Vegas
AU$355
Return
Found 19 hours ago
Select American Airlines flight, departing Thu., 26 Feb. from Ontario to Las Vegas, returning Fri., 27 Feb., priced at AU$355 Found 19 hours ago
American Airlines
Sun., 21 Sep. - Wed., 24 Sep.
ONT
Ontario
LAS
Las Vegas
AU$356
Return
Found 1 hour ago
Select American Airlines flight, departing Sun., 21 Sep. from Ontario to Las Vegas, returning Wed., 24 Sep., priced at AU$356 Found 1 hour ago
American Airlines
Tue., 29 Jul. - Tue., 12 Aug.
ONT
Ontario
LAS
Las Vegas
AU$368
Return
Found 2 days ago
Select American Airlines flight, departing Tue., 29 Jul. from Ontario to Las Vegas, returning Tue., 12 Aug., priced at AU$368 Found 2 days ago
American Airlines
Sat., 26 Jul. - Tue., 12 Aug.
ONT
Ontario
LAS
Las Vegas
AU$398
Return
Found 2 days ago
Select American Airlines flight, departing Sat., 26 Jul. from Ontario to Las Vegas, returning Tue., 12 Aug., priced at AU$398 Found 2 days ago
American Airlines
Sun., 21 Sep. - Tue., 23 Sep.
ONT
Ontario
LAS
Las Vegas
AU$400
Return
Found 2 days ago
Select American Airlines flight, departing Sun., 21 Sep. from Ontario to Las Vegas, returning Tue., 23 Sep., priced at AU$400 Found 2 days ago
Alaska Airlines
Wed., 15 Oct. - Sat., 18 Oct.
ONT
Ontario
LAS
Las Vegas
AU$514
Return
Found 5 days ago
Select Alaska Airlines flight, departing Wed., 15 Oct. from Ontario to Las Vegas, returning Sat., 18 Oct., priced at AU$514 Found 5 days ago
Hawaiian Airlines
Mon., 21 Jul. - Sun., 3 Aug.
ONT
Ontario
LAS
Las Vegas
AU$631
Return
Found 2 days ago
Select Hawaiian Airlines flight, departing Mon., 21 Jul. from Ontario to Las Vegas, returning Sun., 3 Aug., priced at AU$631 Found 2 days ago
United
Fri., 4 Jul. - Sun., 13 Jul.
ONT
Ontario
LAS
Las Vegas
AU$778
Return
Found 2 days ago
Select United flight, departing Fri., 4 Jul. from Ontario to Las Vegas, returning Sun., 13 Jul., priced at AU$778 Found 2 days ago
Flight from Ontario to Las Vegas route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Harry Reid Intl.
Airlines serving
American Airlines
Return price
AU$307
Distance
314 km
Average flight time
1 hour 5 mins

Your quick guide to flights from Ontario to Las Vegas

Pick up great flights from Ontario to Las Vegas

With Expedia, you have your pick of 7 flights a day with 20 airlines covering flights from Ontario to Las Vegas. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Ontario to Las Vegas that take around 1 hours.

Find cheap flights from Ontario to Las Vegas

From the great flight deals with prices currently ranging from AU$307 to AU$778, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Ontario to Las Vegas around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Las Vegas is normally in July.

Reasons to book your flight from Ontario to Las Vegas with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Ontario to Las Vegas across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Las Vegas right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

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 AU$307. 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.

Explore a world of travel with Expedia

Ontario Airports

Los Angeles

Los Angeles Intl. to Las Vegas
AU$109.90

Orange County

John Wayne to Las Vegas
AU$149.40

Burbank

Hollywood Burbank to Las Vegas
AU$284.70

Long Beach

*Available to Expedia members.