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Dulles Intl

$129+ Cheap flights from Las Vegas (LAS) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — IAD
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Find cheap flights from Las Vegas to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl are usually found in July or May, booked 67 days in advance, depart on a Thursday or Friday and return on a Saturday

Cheap flight deals from Las Vegas to Dulles Intl

Cheapest flights from Las Vegas to Dulles Intl
Explore the most affordable flight options available from Las Vegas to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.

This Expedia deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/57:05 am
LAS
-
IAD
1 stop7h 52m
Frontier
Sat 3/78:09 am
IAD
-
LAS
1 stop17h 40m
Frontier
Deal found 2/1$218
This Travelocity deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1212:19 pm
LAS
-
IAD
1 stop9h 17m
Multiple Airlines
Tue 5/196:42 pm
IAD
-
LAS
1 stop7h 48m
Multiple Airlines
Deal found 1/31$224
This Kiwi.com deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/612:59 am
LAS
-
IAD
2 stops20h 37m
Frontier
Mon 4/138:30 pm
IAD
-
LAS
1 stop29h 06m
Frontier
Deal found 2/1$227
This CheapOair deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1511:59 pm
LAS
-
IAD
1 stop28h 28m
Frontier
Mon 4/206:20 am
IAD
-
LAS
1 stop10h 23m
Frontier
Deal found 2/1$232
This Cheapflightsfares deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:05 am
LAS
-
IAD
1 stop7h 52m
Frontier
Fri 2/2710:23 am
IAD
-
LAS
1 stop14h 23m
Frontier
Deal found 2/1$234
This Mytrip deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/181:00 pm
LAS
-
IAD
1 stop8h 21m
Frontier
Wed 3/256:20 am
IAD
-
LAS
1 stop9h 06m
Frontier
Deal found 2/1$240
This Cheapflightsfares deal was found by Cheapflights users on 2/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:41 pm
LAS
-
IAD
1 stop8h 55m
Frontier
Wed 4/226:20 am
IAD
-
LAS
1 stop10h 23m
Frontier
Deal found 2/1$241
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2612:17 pm
LAS
-
IAD
2 stops42h 17m
Frontier
Thu 3/511:22 am
IAD
-
LAS
1 stop14h 26m
Frontier
Deal found 2/2$242
This Expedia deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:58 pm
LAS
-
IAD
1 stop19h 29m
Multiple Airlines
Sat 3/78:09 am
IAD
-
LAS
1 stop17h 40m
Multiple Airlines
Deal found 1/31$244
This Kiwi.com deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
LAS
-
IAD
2 stops14h 36m
Multiple Airlines
Fri 5/88:09 am
IAD
-
LAS
1 stop17h 27m
Multiple Airlines
Deal found 2/2$248
This Expedia deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:00 am
LAS
-
IAD
1 stop8h 27m
Multiple Airlines
Sat 2/2810:29 am
IAD
-
LAS
1 stop9h 32m
Multiple Airlines
Deal found 1/31$250
This United Airlines deal was found by Cheapflights users on 1/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:41 am
LAS
-
IAD
Nonstop4h 27m
United Airlines
Sat 3/76:15 am
IAD
-
LAS
1 stop8h 33m
United Airlines
Deal found 1/31$253

Find flight deals from Las Vegas to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Las Vegas (LAS) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$218
(Expedia)

One-way from

$129
(Expedia)

Popular in

November

Cheapest in

July

Average price

$405

Good round-trip deal

$405 or less

Good one-way deal

$218 or less
Provider with most accurate pricing for Las Vegas Harry Reid Intl-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Las Vegas Harry Reid Intl-Washington, D.C. Dulles Intl flights.
Search Deals
From Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Las Vegas to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Las Vegas to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Las Vegas

Fly to

Dulles Intl

Route

Depart

Return

Price

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 3/3

8:41 am-4:08 pm

Nonstop4h 27m

Washington, D.C. Dulles Intl

Sat 3/7

6:15 am-11:48 am

1 stop8h 33m

$253

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 4/8

8:10 am-3:49 pm

Nonstop4h 39m

Washington, D.C. Dulles Intl

Wed 4/22

1:10 pm-6:27 pm

1 stop8h 17m

$277

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 2/24

1:10 pm-11:19 pm

1 stop7h 09m

Washington, D.C. Dulles Intl

Sat 2/28

3:58 pm-8:31 pm

1 stop7h 33m

$299

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 3/10

11:59 pm-7:20 am

1 stop28h 21m

Washington, D.C. Dulles Intl

Sat 3/14

5:05 am-4:21 pm

1 stop14h 16m

$301

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 2/24

6:55 am-3:50 pm

1 stop5h 55m

Washington, D.C. Dulles Intl

Sat 2/28

4:30 pm-10:20 pm

1 stop8h 50m

$308

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 3/3

6:00 am-4:50 pm

1 stop7h 50m

Washington, D.C. Dulles Intl

Sat 3/7

6:05 pm-12:05 am

2 stops9h 00m

$310

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 2/24

6:00 am-5:27 pm

1 stop8h 27m

Washington, D.C. Dulles Intl

Sun 3/1

7:05 am-3:11 pm

1 stop11h 06m

$320

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 2/25

6:00 am-5:27 pm

1 stop8h 27m

Washington, D.C. Dulles Intl

Sat 2/28

7:05 am-10:07 am

2 stops30h 02m

$325

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 3/10

10:02 am-5:27 pm

2 stops28h 25m

Washington, D.C. Dulles Intl

Wed 4/8

6:22 pm-9:53 am

1 stop18h 31m

$350

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 3/3

1:55 pm-9:20 pm

Nonstop4h 25m

$134

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

Showing 1-10 of 20 results
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Compare providers for flights from Las Vegas to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Las Vegas to Dulles Intl in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Las Vegas-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Las Vegas-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Las Vegas-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Las Vegas-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Las Vegas-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Las Vegas to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Las Vegas with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Las Vegas to Washington, D.C. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Las Vegas to Dulles Intl. Price data was last updated on January 30, 2026.

Booking 67 days in advance of your planned departure date is, on average, the best time to get cheap flights from Las Vegas to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, May is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $113). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $307). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LAS to IAD?

Find hourly flight availability from Las Vegas to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 3, 2026.

It’s optimal to fly from Las Vegas to Washington, D.C. Dulles Intl Airport in the afternoon. By choosing this option you can save up to 53% on the cost of your flight, compared to a flight at noon.

The best insider tips for Las Vegas to Washington, D.C. Dulles Intl Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Las Vegas to Washington, D.C. Dulles Intl Airport trip
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on IAD and LAS

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated February 3, 2026.
Read through reviews of airlines operating flights from Las Vegas to Washington, D.C. Dulles Intl Airport, such as Delta, United Airlines, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,132 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,132 reviews
Delta
7.9
Good
8,132 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,231 reviews
Delta
7.9
Good
8,132 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.7
Fair
3,051 reviews
Delta
7.9
Good
8,132 reviews

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Crew

8.5

Overall

7.9

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Las Vegas to Washington, D.C. Dulles Intl?

    Las Vegas Harry Reid Intl (LAS) is the airport you will fly out of if you book a flight from Las Vegas to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Harry Reid Intl; the airport handles an average of 5 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Las Vegas airport to Washington, D.C. Dulles Intl. It is only a 6.2 mi journey to Harry Reid Intl (LAS) from Las Vegas’s city center.

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

    United Airlines, Frontier, and Southwest can get you from Las Vegas to Washington, D.C. Dulles Intl Airport in just under 4h 27m. Your travel time can differ by up to 23h 54m. There are 2059 mi between Las Vegas and Washington, D.C. Dulles Intl Airport. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Las Vegas to Washington, D.C. Dulles Intl Airport round-trip?

    Flying on Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $128. Additional round-trip tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at $221 and $256, respectively. Users have found that Frontier is 64% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Las Vegas to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $66. However, be on the lookout for offers from United Airlines and Southwest, as they are both options that can get you from Las Vegas to Washington, D.C. Dulles Intl Airport for a low price.

  • What are the most reliable airlines from Las Vegas to Washington, D.C. Dulles Intl Airport?

    No one likes to see their flight delayed. When booking a flight from Las Vegas to Washington, D.C. Dulles Intl Airport consider choosing Brussels Airlines (95%), Austrian Airlines (94%) or United Airlines (91%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from Las Vegas to Washington, D.C. Dulles Intl Airport is generally $1,128, our data shows the cheapest flight currently is $134. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $194 for that flight.

  • Can I find deals for flights from Las Vegas to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Las Vegas to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Las Vegas to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Las Vegas to Dulles Intl.

  • Can I find deals for business class flights from Las Vegas to Dulles Intl?

    Yes. Cheapflights offers flight deals from Las Vegas to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, May is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $113). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $307). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Linthicum Heights
Rockville
Laurel
Towson
Upper Marlboro
Manassas
Largo
Bowie
McLean
Clinton

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Las Vegas to Dulles Intl

Discover the top 3 airlines that operate flights from Las Vegas to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$217FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$221Average$405FlexibilityNo cancel feeOn-time69%
DeltaCheapest$256Average$306FlexibilityNo cancel feeOn-timeN/A

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