$53 Cheap Flights from Washington (IAD) to Las Vegas (LAS)

View $53 flight on Wed, May 14, 2025Opens in a new window

  • 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 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

Cheap Flights from Washington to Las Vegas (IAD-LAS)

Prices were available within the past 7 days and start at $53 for one-way flights and $106 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, May 14 - Sat, May 17
IAD
Washington
LAS
Las Vegas
$106 Roundtrip, just found
$106
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 14 from Washington to Las Vegas, returning Sat, May 17, priced at $106 just found
Frontier Airlines
Wed, May 14 - Sat, May 24
IAD
Washington
LAS
Las Vegas
$122 Roundtrip, just found
$122
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 14 from Washington to Las Vegas, returning Sat, May 24, priced at $122 just found
Frontier Airlines
Sat, May 17 - Tue, May 27
IAD
Washington
LAS
Las Vegas
$123 Roundtrip, just found
$123
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 17 from Washington to Las Vegas, returning Tue, May 27, priced at $123 just found
Frontier Airlines
Tue, May 13 - Wed, Jun 4
IAD
Washington
LAS
Las Vegas
$127 Roundtrip, found 1 hour ago
$127
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, May 13 from Washington to Las Vegas, returning Wed, Jun 4, priced at $127 found 1 hour ago
Frontier Airlines
Sun, May 18 - Wed, May 21
IAD
Washington
LAS
Las Vegas
$138 Roundtrip, just found
$138
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, May 18 from Washington to Las Vegas, returning Wed, May 21, priced at $138 just found
Frontier Airlines
Tue, May 6 - Tue, Jul 8
IAD
Washington
LAS
Las Vegas
$139 Roundtrip, found 2 days ago
$139
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, May 6 from Washington to Las Vegas, returning Tue, Jul 8, priced at $139 found 2 days ago
United
Tue, Jul 1 - Fri, Jul 4
IAD
Washington
LAS
Las Vegas
$215 Roundtrip, found 11 hours ago
$215
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Jul 1 from Washington to Las Vegas, returning Fri, Jul 4, priced at $215 found 11 hours ago
Alaska Airlines
Sun, May 25 - Wed, May 28
IAD
Washington
LAS
Las Vegas
$241 Roundtrip, just found
$241
Roundtrip
just found
Select Alaska Airlines flight, departing Sun, May 25 from Washington to Las Vegas, returning Wed, May 28, priced at $241 just found
Delta
Sun, May 25 - Fri, May 30
IAD
Washington
LAS
Las Vegas
$257 Roundtrip, just found
$257
Roundtrip
just found
Select Delta flight, departing Sun, May 25 from Washington to Las Vegas, returning Fri, May 30, priced at $257 just found
Southwest Airlines
Sat, Jul 12 - Wed, Jul 16
IAD
Washington
LAS
Las Vegas
$257 Roundtrip, found 4 hours ago
$257
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Sat, Jul 12 from Washington to Las Vegas, returning Wed, Jul 16, priced at $257 found 4 hours ago
Flights from Washington (IAD) to Las Vegas (LAS)
Origin airport
Washington Dulles Intl.
Destination airport
Harry Reid Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$106
Distance
2060 mi

Washington to Las Vegas Flights

The cheapest times to fly from Washington to Las Vegas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Las Vegas are during the month of May. You can find some of the cheapest flights from Washington to Las Vegas with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Washington to Las Vegas

Sunday is one of the best days to book for cheap flights from Washington to Las Vegas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Washington to Las Vegas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Las Vegas in 2025. You can also book with separate airlines for your outbound and return journeys, from $53 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Las Vegas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Las Vegas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Harry Reid Airport (formerly McCarran Airport)?
United Airlines operates a direct flight setting off from Washington Dulles Intl. Airport (IAD) at 12:30PM and touching down at McCarran Intl. Airport (LAS) at 2:48PM — a flight duration of 5 hours and 18 minutes. Select your perfect seat, bring something to keep you busy and the time will pass by quickly.
Is it cheaper to buy a plane ticket from IAD to McCarran Intl. Airport (LAS) last minute?
Being spontaneous is an amazing way to explore the globe, but it isn’t necessarily the smartest way to score a cheap fare. Consider booking your Washington Dulles Intl. Airport (IAD) to McCarran Intl. Airport (LAS) journey ahead of time instead of leaving it to the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. You can unleash your spontaneous side when you’re exploring McCarran Intl. Airport (LAS)!
What airline has the least delays from Dulles Intl. Airport to LAS?
If you’d rather not be stuck at the airport for hours — or worse, have your trip upended because of a flight delay — travel with United Airlines. Around 81% of its IAD to LAS services get in on time. You can check your flight status before making your way to the airport through the free Expedia App. It also delivers real-time alerts about other key info, such as changes to your gate number and how to reach your hotel. Everything you need to know is right there in your pocket!
What airports do you fly into for Las Vegas from Washington?
From Washington, you can get to Las Vegas via McCarran Intl. Airport (LAS), Henderson Executive Airport (HSH) and North Las Vegas Airport (VGT). Research which hub is right for you before you make a decision. If you decide on McCarran Intl. Airport (LAS), it’s around 2 mi southeast of downtown. Use the money you save when booking your seat with Expedia to check out the city’s awesome attractions, such as Thomas and Mack Center and Fashion Show Mall.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to McCarran Airport?
The most popular departure times for flights from Dulles Intl. Airport to LAS are between 12:00 PM - 1:00 PM on United Airlines. It’s a good idea to head off in the morning. The earlier you go, the greater your chances of a delay-free flight with lighter air traffic in the sky.
Can I change the date of my flight from IAD to Harry Reid Airport (formerly McCarran Airport)?
Make changes quickly to your Washington Dulles Intl. Airport (IAD) to McCarran Airport flight via the Expedia Trips portal. But before you begin, check the rules and conditions in your itinerary to see what the airline will allow you to do and if fees apply for changes. Some carriers have a change fee per person, plus any difference in ticket prices. But if you booked in the last 24 hours, you may be able to cancel for free and arrange new flights. You can also swing by our Customer Service portal for further information and to connect with our Virtual Agent.

Explore a world of travel with Expedia

*Available to One Key members.