$105 Cheap United flights from Las Vegas to Washington (LAS to IAD)

Find The Best Day To Fly from Las Vegas to Washington

Amazing United LAS to IAD Flight Deals

The cheapest flights to Washington Dulles Intl. found within the past 7 days were $420 round trip and $105 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Oct 16 - Fri, Oct 31
LAS
Las Vegas
IAD
Washington
$420 Roundtrip, found 4 days ago
$420
Roundtrip
found 4 days ago
Select United flight, departing Thu, Oct 16 from Las Vegas to Washington, returning Fri, Oct 31, priced at $420 found 4 days ago

IAD From LAS Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Hilton Garden Inn Washington DC/Greenbelt

Hilton Garden Inn Washington DC/Greenbelt

3 out of 5
Price was $446, price is now $385 per person
$385
per person
Oct 22 - Oct 26
found 22 hours ago
Roundtrip flight included
Las Vegas (LAS) to Washington (DCA)
Global Luxury Suites Bethesda Chevy Chase

Global Luxury Suites Bethesda Chevy Chase

3.5 out of 5
Save 100% on your flight
Price was $752, price is now $596 per person
$596
per person
Oct 22 - Oct 26
found 22 hours ago
Roundtrip flight included
Las Vegas (LAS) to Washington (DCA)
Embassy Suites by Hilton Tysons Corner

Embassy Suites by Hilton Tysons Corner

3.5 out of 5
Price was $968, price is now $837 per person
$837
per person
Oct 22 - Oct 26
found 22 hours ago
Roundtrip non-stop flight included
Las Vegas (LAS) to Washington (DCA)
Don't see what you're looking for?
See all available trips from Harry Reid Intl. to Washington Dulles Intl.
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Frequently asked questions

Can I catch a flight from LAS to Dulles Intl. Airport right now?
It's prudent to know about any travel advice reports and quarantine requirements in effect in your destination city. Be sure to go to our Covid-19 Travel Advisor for up-to-date info on booking a flight to Washington Dulles Intl. Airport (IAD).
What terminal is United Airlines at Harry Reid Airport (formerly McCarran Airport)?
If you're flying from LAS to Washington Dulles Intl. Airport (IAD) with United Airlines, there's a good chance you'll be taking off from terminal 3. Your airline should be able to let you know exactly which terminal you'll be hopping off the plane at.
Are there United Airlines non-stop flights from LAS to IAD?
There are. Book your seat on a direct flight with United Airlines from LAS to Washington Dulles Intl. Airport (IAD), and you won't have to worry about annoying stopovers or catching a connecting flight.
How long is a United Airlines flight from LAS to IAD?
As it will take about 5 hours and 24 minutes for your United Airlines flight to head from LAS to IAD, think about popping a few travel games in your carry-on bag. You never know — the person sitting beside you might relish the opportunity to play to break up the trip.
What type of aircraft does United Airlines fly from LAS to IAD?
United Airlines typically uses the Boeing 737 MAX 9 or the Boeing 737-900 on the route between LAS and IAD.
How many direct and indirect flights does United Airlines fly from LAS to IAD?
You'll have plenty of flexibility if you're thinking about flying with United Airlines between LAS and IAD. It operates at least 4 flights each day.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Dulles Intl. Airport, please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Las Vegas LAS to Washington IAD 

To find the best deals on flights to Las Vegas from Washington with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Las Vegas LAS to Washington IAD with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $420 to $420, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Las Vegas LAS to Washington IAD 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Las Vegas to Washington costs from $105. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to Washington IAD from  Las Vegas LAS with United 

To find a cheap United flight from Las Vegas LAS to Washington IAD, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Las Vegas LAS to Washington IAD 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as October, or if you book a flight with a stopover. 

 

Find nonstop flights from Las Vegas LAS to Washington IAD with United 

If you’re keen to be on Washington soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Las Vegas LAS to Washington IAD 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to Washington IAD from  Las Vegas LAS with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to Washington

Hyatt Regency Dulles

Hyatt Regency Dulles

4 out of 5
2300 Dulles Corner Blvd, Herndon, VA
This hotel features an indoor pool, A 24-hour gym, and a restaurant. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public ...
8.8/10 Excellent! (1,440 reviews)
"The hotel was clean, very nice and quiet. The shuttle easily took me to the airport. It runs on a half hour time schedule and you should come at least 5-10 minutes ahead to guarantee that you will make it to the shuttle."

Reviewed on Sep 18, 2025

Hyatt Regency Dulles
Hyatt Place Herndon Dulles Airport East

Hyatt Place Herndon Dulles Airport East

3 out of 5
13711 Sayward Blvd, Herndon, VA
This hotel features a restaurant, an indoor pool, and a bar/lounge. Traveling on business? Take advantage of the free WiFi in public areas, express check-out, ...
8.2/10 Very Good! (2,503 reviews)
"Very friendly staff, airport transportation, dining options with transportation.. need to remove or replace rugs .. clean rooms.."

Reviewed on Sep 17, 2025

Hyatt Place Herndon Dulles Airport East
Courtyard by Marriott Dulles Airport Herndon

Courtyard by Marriott Dulles Airport Herndon

3 out of 5
13715 Sayward Blvd, Herndon, VA
This hotel features a restaurant, a 24-hour gym, and a bar/lounge. Traveling on business? Take advantage of the business center, free WiFi in public areas, and ...
8.8/10 Excellent! (1,009 reviews)
"The people in this hotel have a good service attitude. Drivers who pick up and drop off at the airport very polite. The room is also very clean. The only thing is the food provided by the restaurant inside.There are not many kinds. But all the food tastes good.The price is also very reasonable."

Reviewed on Sep 15, 2025

Courtyard by Marriott Dulles Airport Herndon
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.