$103 Cheap Flights from Washington (IAD) to Las Vegas (LAS)

View $103 flight on Mon, Oct 20, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)

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

Prices were available within the past 7 days and start at $103 for one-way flights and $176 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Oct 20 - Sat, Oct 25
IAD
Washington
LAS
Las Vegas
$176 Roundtrip, found 3 hours ago
$176
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Mon, Oct 20 from Washington to Las Vegas, returning Sat, Oct 25, priced at $176 found 3 hours ago
Frontier Airlines
Sun, Oct 26 - Thu, Oct 30
IAD
Washington
LAS
Las Vegas
$180 Roundtrip, found 12 hours ago
$180
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Sun, Oct 26 from Washington to Las Vegas, returning Thu, Oct 30, priced at $180 found 12 hours ago
Frontier Airlines
Sun, Oct 26 - Thu, Oct 30
IAD
Washington
LAS
Las Vegas
$186 Roundtrip, found 12 hours ago
$186
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Sun, Oct 26 from Washington to Las Vegas, returning Thu, Oct 30, priced at $186 found 12 hours ago
Frontier Airlines
Mon, Oct 20 - Fri, Oct 24
IAD
Washington
LAS
Las Vegas
$206 Roundtrip, found 1 hour ago
$206
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Oct 20 from Washington to Las Vegas, returning Fri, Oct 24, priced at $206 found 1 hour ago
Frontier Airlines
Sat, Oct 11 - Fri, Oct 17
IAD
Washington
LAS
Las Vegas
$226 Roundtrip, just found
$226
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Oct 11 from Washington to Las Vegas, returning Fri, Oct 17, priced at $226 just found
Frontier Airlines
Sun, Oct 26 - Thu, Oct 30
IAD
Washington
LAS
Las Vegas
$236 Roundtrip, found 12 hours ago
$236
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Sun, Oct 26 from Washington to Las Vegas, returning Thu, Oct 30, priced at $236 found 12 hours ago
Alaska Airlines
Sat, Nov 15 - Wed, Nov 19
IAD
Washington
LAS
Las Vegas
$262 Roundtrip, found 2 hours ago
$262
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sat, Nov 15 from Washington to Las Vegas, returning Wed, Nov 19, priced at $262 found 2 hours ago
American Airlines
Wed, Oct 29 - Thu, Oct 30
IAD
Washington
LAS
Las Vegas
$280 Roundtrip, found 1 hour ago
$280
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Oct 29 from Washington to Las Vegas, returning Thu, Oct 30, priced at $280 found 1 hour ago
United
Mon, Nov 10 - Wed, Nov 19
IAD
Washington
LAS
Las Vegas
$283 Roundtrip, found 1 hour ago
$283
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Nov 10 from Washington to Las Vegas, returning Wed, Nov 19, priced at $283 found 1 hour ago
Southwest Airlines
Fri, Oct 31 - Thu, Nov 6
IAD
Washington
LAS
Las Vegas
$317 Roundtrip, found 1 hour ago
$317
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Fri, Oct 31 from Washington to Las Vegas, returning Thu, Nov 6, priced at $317 found 1 hour ago

Find the cheapest month to fly from Washington (IAD) to Las Vegas (LAS)

May is typically the cheapest month to fly

From $122 - $500 per traveler.

Alternative airports near Las Vegas

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to McCarran Intl. LAS. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $656
LAS
McCarran Intl.
CheapestClosest
Average driving time to city center6 min
Flights from $656

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS) cost?
Snag a cheap one-way flight from $103 or cheap return flight from $176 from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
Planning your getaway for October is a great way to save, as it's the cheapest month for flights between IAD and LAS. You'll often find the lowest prices during off-peak months.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
Board a nonstop flight with United Airlines and head straight from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS).
How many flights per day from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
When jetting out of Washington Dulles Intl. Airport (IAD), you'll have a choice from an average of 3 daily direct flights to Harry Reid Intl. Airport (LAS).
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
The 9 AM departures from IAD to LAS are the most sought after. These flights can come with a higher price due to their popularity. If you want to save money, book during off-peak hours.
What day of the week has the most flights from IAD to LAS?
Friday has the most flights from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS). Consider jetting off on this day and you'll have the best chance of finding a departure that works with your plans.
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
Catch the earliest flight at around 9:00AM UTC-5, heading out of Washington Dulles Intl. Airport (IAD). You'll be flying for roughly 5h 23m, touching down at Harry Reid Intl. Airport (LAS) at approximately 11:23AM UTC-8.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
The average flight time from IAD to LAS is 5 hours and 23 minutes, covering a distance of 2,100 mi.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
To avoid possible delays on the Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS) route, aim to fly before 3 PM. Later departures have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Las Vegas from Washington Dulles Intl. Airport (IAD)?
Harry Reid Intl. Airport (LAS) is the only airport in Las Vegas with direct flights from Washington Dulles Intl. Airport (IAD). Browse the available options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS) last-minute?
Holding off until just before your departure to book your flight from IAD to LAS often results in higher prices. Although you may find some last-minute deals, there's no guarantee. Be flexible with your itinerary to boost your chances of getting a bargain.
Is it cheaper to book an IAD to LAS flight and hotel package?
Opting for an IAD to LAS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Choose from our impressive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS)?
You can usually reschedule or cancel your IAD to LAS flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

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
$175
Distance
2060 mi
Average flight time
2 hours 2 mins

Book with confidence

Book with confidence

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 October. 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 $103 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.

 

Washington to Las Vegas Flights

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