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Dulles Intl

$100+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — IAD
Sep 2 — Sep 91
Wed 9/2
Wed 9/9
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

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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 October or August, booked 56 days in advance, depart on a Thursday or Friday and return on a Wednesday

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 August 3, 2026.

This deal was found by Cheapflights users on 7/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:00 am
LAS
-
IAD
1 stop7h 36m
Frontier
Sun 10/116:00 am
IAD
-
LAS
Nonstop4h 58m
Frontier
Deal found 7/31$153
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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.
Tue 9/1510:46 pm
LAS
-
IAD
Nonstop4h 34m
Frontier
Tue 9/226:00 am
IAD
-
LAS
Nonstop4h 58m
Frontier
Deal found 7/30$156
This Super.com deal was found by Cheapflights users on 7/30. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2310:46 pm
LAS
-
IAD
Nonstop4h 34m
Frontier
Mon 9/286:00 am
IAD
-
LAS
Nonstop4h 58m
Frontier
Deal found 7/30$157
This Super.com deal was found by Cheapflights users on 7/31. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:30 am
LAS
-
IAD
Nonstop4h 34m
Frontier
Mon 9/78:59 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/31$158
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2410:46 pm
LAS
-
IAD
Nonstop4h 34m
Frontier
Sat 10/36:00 am
IAD
-
LAS
Nonstop4h 58m
Frontier
Deal found 7/30$159
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/212:30 am
LAS
-
IAD
Nonstop4h 34m
Frontier
Mon 9/78:59 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/30$160
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 8/1212:46 am
LAS
-
IAD
Nonstop4h 34m
Frontier
Mon 8/179:50 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/30$161
This eDestinos deal was found by Cheapflights users on 7/30. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:40 am
LAS
-
IAD
1 stop13h 12m
Frontier
Mon 8/248:59 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/30$162
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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.
Tue 8/1112:46 am
LAS
-
IAD
Nonstop4h 34m
Frontier
Thu 8/208:59 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/29$163
This Super.com deal was found by Cheapflights users on 7/29. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:46 am
LAS
-
IAD
Nonstop4h 34m
Frontier
Thu 8/208:59 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/29$164
This Super.com deal was found by Cheapflights users on 7/30. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:30 am
LAS
-
IAD
Nonstop4h 34m
Frontier
Sun 8/238:59 am
IAD
-
LAS
Nonstop4h 55m
Frontier
Deal found 7/30$168

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 August 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$153

One-way from

$100
(United Airlines)

Popular in

March

Cheapest in

October

Average price

$361

Good round-trip deal

$249 or less

Good one-way deal

$167 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. 4% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 9/23

8:20 am-3:58 pm

Nonstop4h 38m

Washington, D.C. Dulles Intl

Sun 9/27

6:00 pm-8:08 pm

Nonstop5h 08m

$249

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Fri 8/21

7:05 am-4:42 pm

1 stop6h 37m

Washington, D.C. Dulles Intl

Fri 8/28

5:47 pm-11:10 pm

1 stop8h 23m

$257

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Mon 8/31

11:30 pm-11:49 am

1 stop9h 19m

Washington, D.C. Dulles Intl

Mon 9/7

6:00 am-10:33 am

1 stop7h 33m

$263

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Fri 8/28

10:00 pm-10:04 am

1 stop9h 04m

Washington, D.C. Dulles Intl

Fri 9/4

7:15 pm-12:40 am

1 stop8h 25m

$263

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 10/8

1:08 pm-11:26 pm

1 stop7h 18m

Washington, D.C. Dulles Intl

Tue 10/13

5:13 pm-9:04 pm

1 stop6h 51m

$269

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Fri 8/14

11:47 am-11:21 pm

1 stop8h 34m

Washington, D.C. Dulles Intl

Sun 8/16

6:00 am-11:01 am

1 stop8h 01m

$289

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 10/15

12:59 am-11:21 am

1 stop7h 22m

Washington, D.C. Dulles Intl

Tue 10/20

3:03 pm-7:52 pm

1 stop7h 49m

$289

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 11/25

7:45 am-3:13 pm

Nonstop4h 28m

Washington, D.C. Dulles Intl

Fri 11/27

5:40 pm-7:58 pm

Nonstop5h 18m

$317

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 8/18

8:20 am-3:58 pm

Nonstop4h 38m

Washington, D.C. Dulles Intl

Wed 8/26

12:55 pm-2:59 pm

Nonstop5h 04m

$329
Quickest round-trip

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 8/20

11:57 pm-7:30 am

Nonstop4h 33m

Washington, D.C. Dulles Intl

Wed 8/26

12:55 pm-2:59 pm

Nonstop5h 04m

$331

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 21 resultsSorted by cheapest first
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3

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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
Super.comPrice Accuracy-Trust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy1 starTrust 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?

Booking 55 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, October is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $355). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $537). 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 August 3, 2026.

It’s optimal to fly from Las Vegas to Washington, D.C. Dulles Intl Airport in the evening. By choosing this option you can save up to 73% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost to fly round-trip from Las Vegas to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Las Vegas to Washington, D.C. Dulles Intl Airport flights typically cost between $252 and $457 in October.
The cheapest round-trip price found within the last 5 days was $153 on Frontier (Oct 8-Oct 11).

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 August 3, 2026.
Read through reviews of airlines operating flights from Las Vegas to Washington, D.C. Dulles Intl Airport, such as Delta,United Airlines, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,486 reviews

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,486 reviews
Delta
7.8
Good
8,486 reviews

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
10,058 reviews
Delta
7.8
Good
8,486 reviews

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Frontier
5.6
Fair
2,740 reviews
Delta
7.8
Good
8,486 reviews

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 6 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 and Delta can get you from Las Vegas to Washington, D.C. Dulles Intl Airport in just under 4h 38m. Your travel time can differ by up to 1h 59m. 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 $177. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $256 and $267, respectively. Users have found that Frontier is 58% 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 $122. However, be on the lookout for offers from United Airlines and Delta, 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 Ethiopian Air (89%), Austrian Airlines (87%) or Brussels Airlines (87%) 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 $1,617, our data shows the cheapest flight currently is $45. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $178 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, October is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $355). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in March is currently the most expensive (average of $537). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Sterling
Clinton
Oxon Hill
Hunt Valley
Woodbridge

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Las Vegas to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Las Vegas to Baltimore flights
Las Vegas to Reagan-National flights
Reno to Dulles Intl flights
Reno to Baltimore flights
Reno to Reagan-National flights
Twin Falls to Baltimore flights

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 August 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$177Average$343FlexibilityNo cancel feeOn-time62%
DeltaCheapest$256Average$296FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$267Average$472FlexibilityNo cancel feeOn-time69%

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