LAS - IAD

$148 Find Cheap Flights from Las Vegas to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Las Vegas to Dulles Intl departing on 4/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Las Vegas to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Las Vegas to Washington, D.C., as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$254
Overall average: $556
Frontier
Wed 4/1Mon 4/6
LAS - IAD • 1 stop
Cheapest non-stop
$295
Typical prices: $385-$555
United Airlines
Sat 4/18Sat 4/25
LAS - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers extra legroom benefits.
Use the Silver Line Metro for easy access to downtown D.C.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $254 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 4h 34m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 91% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $204 (round-trip)
Shortest trip • 6h 33m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 35% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Dulles Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Las Vegas to Dulles Intl (LAS-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Las Vegas to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Las Vegas to Dulles Intl

Wed, Apr 1 - Mon, Apr 6
Frontier Logo
11:59 pm - 1:44 pm
LAS
-
IAD
10h 45m
1 stop
Frontier Logo
8:34 am - 11:30 am
IAD
-
LAS
29h 56m
1 stop
$254Frontier
Sat, Apr 25 - Sun, May 3
Frontier Logo
11:54 pm - 7:32 am
LAS
-
IAD
28h 38m
1 stop
Frontier Logo
6:20 am - 1:43 pm
IAD
-
LAS
10h 23m
1 stop
$256Frontier
Sun, May 10 - Mon, May 18
Multiple Airlines Logo
10:52 pm - 8:56 am
LAS
-
IAD
7h 04m
1 stop
Multiple Airlines Logo
8:09 am - 10:36 pm
IAD
-
LAS
17h 27m
1 stop
$257Multiple Airlines
Wed, Apr 8 - Mon, Apr 20
Frontier Logo
11:59 pm - 11:33 am
LAS
-
IAD
8h 34m
1 stop
Frontier Logo
6:00 am - 10:28 pm
IAD
-
LAS
19h 28m
1 stop
$258Frontier
Wed, Apr 8 - Wed, Apr 15
Frontier Logo
11:59 pm - 11:33 am
LAS
-
IAD
8h 34m
1 stop
Frontier Logo
7:00 am - 7:32 pm
IAD
-
LAS
15h 32m
1 stop
$259Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
6:00 am - 6:12 pm
LAS
-
IAD
9h 12m
1 stop
Frontier Logo
1:26 pm - 2:10 pm
IAD
-
LAS
27h 44m
2 stops
$260Frontier
Mon, Aug 31 - Mon, Sep 7
Frontier Logo
11:13 am - 5:13 pm
LAS
-
IAD
27h 00m
1 stop
Frontier Logo
5:28 pm - 9:53 am
IAD
-
LAS
19h 25m
1 stop
$261Frontier
Thu, Apr 2 - Mon, Apr 6
Frontier Logo
12:41 pm - 12:36 am
LAS
-
IAD
8h 55m
1 stop
Frontier Logo
8:34 am - 11:30 am
IAD
-
LAS
29h 56m
1 stop
$262Frontier
Wed, Apr 8 - Wed, Apr 15
Frontier Logo
11:59 pm - 11:33 am
LAS
-
IAD
8h 34m
1 stop
Frontier Logo
7:00 am - 3:18 pm
IAD
-
LAS
11h 18m
2 stops
$263Frontier
Sat, May 16 - Thu, May 21
Frontier Logo
11:59 pm - 7:27 am
LAS
-
IAD
28h 28m
1 stop
Frontier Logo
2:08 pm - 11:42 pm
IAD
-
LAS
12h 34m
1 stop
$264Frontier
Booking Insights

KAYAK's insights & trends for Las Vegas to Dulles Intl flights

Get data-powered insights and trends into flights from Las Vegas to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Las Vegas to Washington Dulles Airport?

The average price of all round-trip flights from Las Vegas to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

For Las Vegas to Washington Dulles Airport, Thursday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Washington Dulles Airport back to Las Vegas, the best deals are generally found on Saturday, with Thursday being the most expensive.

What is the cheapest month to fly from Las Vegas to Washington, D.C. Dulles Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Las Vegas to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Las Vegas to Washington, D.C. Dulles Intl Airport is July, where tickets cost $248 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $556 and $500 respectively.

Can I save money by flying with a layover from Las Vegas to Washington, D.C. Dulles Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $448, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Las Vegas to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Las Vegas to Washington, D.C. Dulles Intl Airport, you should book around 3 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Expert advice

Expert advice for your flight from Las Vegas to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Frontier and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Harriet Baskas

Harriet Baskas

Expert on LAS

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Good to know

Low seasonNovember
Cheapest flight$148
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly and prices are also 35% lower on average.
Flight from Las Vegas to Washington Dulles Airport

When to book flights from Las Vegas to Dulles Intl

Are your dates flexible? Find out the best times to travel from Las Vegas to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Las Vegas to Washington Dulles Airport flights

  • Which airline offers favorable carry-on policies to its passengers?

    Spirit Airlines allows passengers to come on board with one carry-on bag and one personal item with a combined maximum weight of 40 lb. This will allow you to travel with your sizable luggage from Las Vegas to Washington Dulles Airport.

  • Which airline among those flying from Las Vegas to Washington Dulles Airport offers special meals?

    For those passengers traveling from Las Vegas to IAD airport with specific dietary requirements, book an airline that serves special meals. American Airlines will allow you to meet all your dietary needs depending on your order. It offers various special meals like vegetarian, gluten-free, and diabetic.

  • How can I easily get from Washington Dulles Airport (IAD) to the city center?

    One of the quickest and most reliable means of transport you can consider using when leaving IAD airport upon arrival is a taxi. On the other hand, you can choose the private Washington Dulles Airport shuttle to take you to your preferred destination.

  • What are the most popular layovers when flying from Las Vegas (LAS) to Washington Dulles Airport?

    Booking United Airlines will allow you to experience one layover during your journey. You will have one stop before reaching your destination at Denver International Airport (DEN) before landing at IAD.

  • What is the cheapest flight from Las Vegas to Washington, D.C. Dulles Intl Airport?

    In the last 3 days, the lowest price for a flight from Las Vegas to Washington, D.C. Dulles Intl Airport was $148 for a one-way ticket and $254 for a round-trip.

  • Do I need a passport to fly between Las Vegas and Washington Dulles Airport?

    No

  • Which airlines offer Wi-Fi service onboard planes from Las Vegas to Washington Dulles Airport?

    JetBlue, Air Canada, American Airlines, and Delta offer inflight Wi-Fi service on the Las Vegas to Washington Dulles Airport flight route.

  • Which aircraft models fly most regularly from Las Vegas to Washington Dulles Airport?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Las Vegas to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Las Vegas to Washington Dulles Airport?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Las Vegas and Washington Dulles Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Las Vegas to Washington Dulles Airport?

    There are nonstop flights from Las Vegas to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Las Vegas to Washington, D.C., Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Las Vegas to Washington, D.C. are Delta and United Airlines. With an average price for the route of $306 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $412 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Las Vegas to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Las Vegas to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Las Vegas to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Las Vegas is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Las Vegas to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Las Vegas with another airline. Booking your flights between Las Vegas and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Las Vegas to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Las Vegas up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Las Vegas to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $254 or less one-way and $510 or less round-trip.
  • When you are planning to fly from Las Vegas, you will have to start your journey at Harry Reid International Airport (LAS) and land at Washington Dulles International Airport (IAD). You also have an alternative of departing from Boulder City Municipal Airport (BLD) and arriving at Baltimore/Washington International Thurgood Marshall Airport (BWI), but this route is less popular with cheaper flights.
  • If you are planning to travel with your kid from Las Vegas to IAD with your kid, you need to book a kid-friendly airline that will make your kid's journey more enjoyable and memorable. JetBlue is one of the kid-friendly airlines you can consider. It has great amenities like an in-flight entertainment, kid's movies, and kid’s meals.
  • When you are located in Las Vegas's downtown area and you are looking for a suitable mode of transport to LAS airport, you should consider taking a bus. It is the most reliable and convenient means of transport linking the airport to downtown.
  • For you to qualify to travel with your pet from Las Vegas to IAD airport, you are required to book an airline that allows passengers to come on board with their pets. Alaska Airlines allows you to travel with your pet in the cabin as long as the pet's weight and that of the carrier combined does not exceed 20 lb.
  • Reduced mobility passengers who are planning to fly from Las Vegas to IAD airport should book one of the airlines flying out of Las Vegas that offers mobility services to such travelers. Frontier Airlines is one of the suitable airlines you can book. It offers wheelchair services to enhance your movement and its on-board staff are always ready to offer assistance when needed.

Prefer to fly direct from Las Vegas to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl.
Find which airlines fly direct from Las Vegas Harry Reid Intl Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 3 airlines serving from Las Vegas to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Las Vegas to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Las Vegas to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8277 reviews
7.9Comfort
7.8Entertainment
8.5Crew
7.2Food
8.1Boarding
Airline reviews

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

8.0 ExcellentMary, Mar 2026
LGA - MKE
Read more Delta reviews

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

Delayed. Hot. Passenger next to me was so large I couldn’t move.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

The boarding process doesn't make sense since some people that will sit behind your rows are boarded before you and then they take up the luggage space above your head. I then have to wait for people to get off the plane before I can go back to get my luggage.

Good flight. Connector flight was delayed so made a short turnaround in Atlanta which was stressful. Otherwise, great crew, Staff in ATL was very informative about the delay and ensured people their connections were fine. Notified the ones that were not. Great communication.

The flight went very well, but the flight attendants didn't serve and food or drinks other than 1st class due to rough air but to be honest it wasn't that bumpy and I felt that they could've at least offered water and coffee perhaps. Also serving 1st class only is a bad look. I've been in 1st class many times and I would've felt that if the turbulence was too rough for the main cabin, it would be too rough for 1st class too.

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

Bad food, bad service, cold cabin with no additional blankets when asked for (they told me they don’t provide additional blankets). I’m a frequent traveler and this is one of the worst companies I traveled with (by the way I thought that I booked my ticket with Lufthansa but I didn’t see that the flights were handled by United).

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

Everything you need to know for your flight from Las Vegas to Dulles Intl

Information on your arrival and departure airports