LAS - IAD

$160 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 8/7. 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
$270
Typical prices: $351-$206
Frontier
Wed 7/8Thu 7/16
LAS - IAD • Non-stop
Cheapest non-stop
$271
Typical prices: $347-$193
Frontier
Mon 7/6Tue 7/14
LAS - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United Economy Plus adds up to six inches more legroom than standard economy.
Frontier Premium Bundle adds priority boarding and extra-legroom Premium seats.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $270 (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 Frontier and United Airlines. Average duration is 4h 37m
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
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
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+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, Jul 8 - Thu, Jul 16
Frontier Logo
12:46 am - 8:20 am
LAS
-
IAD
4h 34mnonstop
Frontier Logo
1:32 pm - 9:17 pm
IAD
-
LAS
10h 45m
1 stop
$270Frontier
Mon, Jul 6 - Tue, Jul 14
Frontier Logo
12:46 am - 8:20 am
LAS
-
IAD
4h 34mnonstop
Frontier Logo
9:50 am - 11:45 am
IAD
-
LAS
4h 55mnonstop
$271Frontier
Fri, Jul 3 - Sat, Jul 11
Frontier Logo
12:50 am - 8:25 am
LAS
-
IAD
4h 35mnonstop
Frontier Logo
9:57 pm - 10:32 pm
IAD
-
LAS
27h 35m
2 stops
$272Frontier
Mon, Jul 13 - Tue, Jul 14
United Airlines Logo
11:30 pm - 9:24 am
LAS
-
IAD
6h 54m
1 stop
United Airlines Logo
8:10 pm - 10:19 pm
IAD
-
LAS
5h 09mnonstop
$273United Airlines
Fri, Jun 26 - Wed, Jul 1
Frontier Logo
12:50 am - 8:25 am
LAS
-
IAD
4h 35mnonstop
Frontier Logo
9:55 am - 11:53 am
IAD
-
LAS
4h 58mnonstop
$274Frontier
Wed, Jul 8 - Thu, Jul 16
Frontier Logo
12:46 am - 8:20 am
LAS
-
IAD
4h 34mnonstop
Frontier Logo
9:50 am - 11:45 am
IAD
-
LAS
4h 55mnonstop
$275Frontier
Wed, Jul 8 - Sun, Jul 12
Frontier Logo
12:46 am - 8:20 am
LAS
-
IAD
4h 34mnonstop
Frontier Logo
1:32 pm - 12:04 pm
IAD
-
LAS
25h 32m
1 stop
$278Frontier
Mon, Aug 31 - Tue, Sep 8
Frontier Logo
12:15 am - 7:50 am
LAS
-
IAD
4h 35mnonstop
Frontier Logo
9:20 am - 11:18 am
IAD
-
LAS
4h 58mnonstop
$279Frontier
Sat, Jul 25 - Tue, Aug 4
Frontier Logo
6:00 am - 9:12 pm
LAS
-
IAD
12h 12m
1 stop
Frontier Logo
9:50 am - 11:45 am
IAD
-
LAS
4h 55mnonstop
$281Frontier
Wed, Jul 29 - Mon, Aug 3
Frontier Logo
12:46 am - 8:20 am
LAS
-
IAD
4h 34mnonstop
Frontier Logo
9:50 am - 11:45 am
IAD
-
LAS
4h 55mnonstop
$282Frontier
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.

How much is a round-trip flight from Las Vegas to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Las Vegas to Washington, D.C. Dulles Intl Airport departing in July.

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 Tuesday, 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 $306 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $537 and $481 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 $409, 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 2 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 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 seasonMarch
Cheapest flight$160
Best time to beat the crowds but there is an average 31% increase in price.
Most popular time to fly and prices are also 26% 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 5 days, the lowest price for a flight from Las Vegas to Washington, D.C. Dulles Intl Airport was $160 for a one-way ticket and $270 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, 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 8 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 $461 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 $213 or less one-way and $347 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

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

Direct returns

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

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,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 8396 reviews
7.2Food
7.8Entertainment
8.5Crew
7.8Comfort
8.1Boarding
Airline reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

2.0 MediocreTravis, Jun 2026
SFO - LAX
Read more Delta reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

Connection flights should be spaced out farther because too close I missed my connection.

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

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

Information on your arrival and departure airports