LAS - IAD

$127 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 2/21. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$215
Overall average: $405
Frontier
Wed 2/11Sun 3/1
LAS - IAD • 1 stop
Cheapest non-stop
$357
Typical prices: $381-$591
United Airlines
Wed 2/18Wed 3/4
LAS - IAD • Non-stop
Our travelers' advice
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
Frontier
Cheapest • from $215 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 39% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 35% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
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, Feb 11 - Sun, Mar 1
Frontier Logo
11:59 pm - 4:43 pm
LAS
-
IAD
13h 44m
1 stop
Frontier Logo
11:15 am - 10:48 pm
IAD
-
LAS
14h 33m
1 stop
$215Frontier
Fri, Feb 20 - Sat, Mar 7
Frontier Logo
5:54 am - 9:34 am
LAS
-
IAD
24h 40m
2 stops
Frontier Logo
8:09 am - 10:49 pm
IAD
-
LAS
17h 40m
1 stop
$216Frontier
Wed, Feb 18 - Mon, Mar 2
Multiple Airlines Logo
10:21 am - 9:25 am
LAS
-
IAD
20h 04m
2 stops
Multiple Airlines Logo
10:20 am - 6:42 pm
IAD
-
LAS
11h 22m
1 stop
$217Multiple Airlines
Sat, Feb 21 - Sat, Mar 7
Frontier Logo
11:03 pm - 8:09 am
LAS
-
IAD
30h 06m
1 stop
Frontier Logo
8:09 am - 10:49 pm
IAD
-
LAS
17h 40m
1 stop
$219Frontier
Thu, Feb 12 - Sat, Feb 28
Multiple Airlines Logo
7:05 am - 5:57 pm
LAS
-
IAD
7h 52m
1 stop
Multiple Airlines Logo
10:29 am - 10:46 pm
IAD
-
LAS
15h 17m
2 stops
$221Multiple Airlines
Tue, Feb 24 - Fri, Feb 27
Multiple Airlines Logo
11:03 pm - 9:25 am
LAS
-
IAD
31h 22m
1 stop
Multiple Airlines Logo
10:23 am - 6:42 pm
IAD
-
LAS
11h 19m
1 stop
$224Multiple Airlines
Wed, Feb 25 - Fri, Feb 27
Frontier Logo
11:59 pm - 10:33 am
LAS
-
IAD
7h 34m
1 stop
Frontier Logo
10:23 am - 9:46 pm
IAD
-
LAS
14h 23m
1 stop
$228Frontier
Thu, Feb 12 - Mon, Feb 16
Frontier Logo
7:05 am - 5:57 pm
LAS
-
IAD
7h 52m
1 stop
Frontier Logo
6:37 pm - 11:29 pm
IAD
-
LAS
7h 52m
1 stop
$230Frontier
Thu, Feb 19 - Sun, Mar 1
Multiple Airlines Logo
12:17 pm - 9:25 am
LAS
-
IAD
18h 08m
1 stop
Multiple Airlines Logo
11:15 am - 10:46 pm
IAD
-
LAS
14h 31m
2 stops
$231Multiple Airlines
Fri, Feb 20 - Sat, Mar 7
Multiple Airlines Logo
11:46 am - 9:34 am
LAS
-
IAD
18h 48m
2 stops
Multiple Airlines Logo
8:09 am - 10:49 pm
IAD
-
LAS
17h 40m
1 stop
$232Multiple Airlines
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 $237 (return) on average. On the other hand, the most expensive months are January and November, where the average cost of round-trip tickets is $481 and $464 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 39% 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$127
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly and prices are also 36% 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 $127 for a one-way ticket and $215 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, Delta, and American Airlines 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 $395 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 $199 or less one-way and $405 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 8112 reviews
7.8Entertainment
7.2Food
8.1Boarding
7.9Comfort
8.5Crew
Airline reviews

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

2.0 MediocreGary, Jan 2026
CLE - DTW
Read more Delta reviews

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

The flight was delayed and oversold. I volunteered to give up my seat for compensation. Thinking I could get a good night's sleep instead of arriving home at 2 am. It took over an hour to get the new reservation confirmed, three different gate attendants, and two red coats. It took even longer to confirm the overnight hotel, and when I arrived, the line was 45 minutes long, with two people checking in, and at least 15 people slowly, very slowly—no food except frozen convenience food, no coupon for food from airlines. Slept, headed back to the airport, and that flight had an equipment change and a gate change just as they were about to board. It took an additional hour to board as they cleaned the plane from storage.

There was no wifi available on this flight. And there were no screens, no onboard entertainment, no entertainment options at all. It was like travelling in the 1990s again, except without even a main screen for options. Seats, as usual, were tight and uncomfortable.

Good seat comfort ORF to ATL. Bad seat ATL to SEA (terrible lumbar support, hard, ouch)..

Because I was moved to an exit row, the snacks in economy comfort, the selection of snacks was better.

I upgraded to first. Quick and easy boarding. Comfortable seat with power and a nice IPA.

Probably not the fault of Delta but there was delay after delay after delay and I ended up getting home 4 hours later then I should have at 1:30 in the morning

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.

The flight crew where really good. Better then the crew from BNE to SFO

Safe made to destination. Late to start at GVA for icy reasons but we fought our next fly.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

l really enjoy very much the flight was very pleasant

The flight was delayed for 1:30 hours for maintenance issues. They should give more information about connecting flights. For a Business Cabin the Crew was mediocre.

The food is terrible. The same pasta or chicken with bad taste and presentation

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

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.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

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

Information on your arrival and departure airports