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

Frontier, Hawaiian Airlines, and Delta can get you from Las Vegas to Washington, D.C. Dulles Intl Airport in just under 7h 29m. Your travel time can differ by up to 4h 14m. 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 $141. Additional round-trip tickets that might be worth considering are offered by Southwest and United Airlines, with the lowest prices starting at $204 and $244, respectively. Users have found that Frontier is 64% cheaper than the other options available to this destination.

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

Travelers seeking maximum savings on their Las Vegas to Washington, D.C. Dulles Intl Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Las Vegas to Washington, D.C. Dulles Intl Airport

The most flights from LAS to IAD are scheduled on a Monday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 $633, our data shows the cheapest flight currently is $107. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $163 for that flight.

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 (96%), United Airlines (89%) or Austrian Airlines (87%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from Las Vegas to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from Las Vegas to Washington, D.C. Dulles Intl Airport are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

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 7 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 5 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.

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.

$105+ Cheap Flights from Las Vegas to Washington, D.C. Dulles Intl Airport

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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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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 Tuesday

Cheap flight deals from Las Vegas to Dulles Intl

Round-trip from	$156 (Priceline)
One-way from	$105 (Kiwi.com)
Popular in	October
Cheapest in	July
Average price	$417
Good round-trip deal	$307 or less
Good one-way deal	$161 or less

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

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One-way flight from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($66 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

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Price to beat on a round-trip flight from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from Las Vegas Harry Reid Intl to Washington, D.C. Dulles Intl.

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Find 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 September 16, 2025.

Fri 10/109:05 pmLAS - IAD

1 stop11h 54mFrontier

Mon 10/2010:04 amIAD - LAS

1 stop8h 52mFrontier

Deal found 9/15

$156

Thu 10/169:05 pmLAS - IAD

1 stop9h 04mFrontier

Mon 10/204:45 pmIAD - LAS

1 stop8h 03mFrontier

Deal found 9/14

$160

Wed 10/2911:50 pmLAS - IAD

Nonstop4h 19mUnited Airlines

Wed 11/57:41 pmIAD - LAS

Nonstop5h 19mUnited Airlines

Deal found 9/15

$163

Thu 10/169:05 pmLAS - IAD

1 stop9h 04mFrontier

Sun 10/198:02 pmIAD - LAS

1 stop16h 33mFrontier

Deal found 9/15

$164

Thu 11/612:44 pmLAS - IAD

1 stop8h 27mFrontier

Sun 11/96:00 amIAD - LAS

1 stop8h 34mFrontier

Deal found 9/14

$165

Thu 10/3012:44 pmLAS - IAD

1 stop7h 45mFrontier

Mon 11/38:36 pmIAD - LAS

1 stop16h 31mFrontier

Deal found 9/16

$168

Wed 10/2911:02 pmLAS - IAD

1 stop16h 25mFrontier

Sun 11/25:00 amIAD - LAS

1 stop8h 34mFrontier

Deal found 9/14

$170

Fri 9/2612:55 amLAS - IAD

1 stop8h 07mFrontier

Sat 10/2512:54 pmIAD - LAS

1 stop8h 27mFrontier

Deal found 9/14

$176

Thu 9/2511:00 pmLAS - IAD

1 stop10h 55mFrontier

Mon 9/291:55 pmIAD - LAS

1 stop10h 28mFrontier

Deal found 9/14

$179

Mon 10/67:00 amLAS - IAD

1 stop13h 16mFrontier

Sat 10/119:38 pmIAD - LAS

1 stop14h 49mFrontier

Deal found 9/15

$180

Thu 9/2511:00 pmLAS - IAD

1 stop10h 55mFrontier

Sun 9/287:14 pmIAD - LAS

1 stop16h 56mFrontier

Deal found 9/14

$184

Best flights from Las Vegas to Dulles Intl
Discover carefully curated flight deals from Las Vegas to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2025.

Wed 10/2212:55 amLAS - IAD

2 stops11h 43mFrontier

Mon 10/275:00 pmIAD - LAS

1 stop8h 06mFrontier

Deal found 9/15

$199

Thu 11/136:00 amLAS - IAD

1 stop8h 13mHawaiian Airlines

Fri 11/145:40 pmIAD - LAS

1 stop8h 53mHawaiian Airlines

Deal found 9/15

$226

Sat 10/116:00 amLAS - IAD

1 stop7h 29mDelta

Tue 10/145:52 pmIAD - LAS

1 stop7h 37mDelta

Deal found 9/14

$257

Tue 10/78:30 amLAS - IAD

Nonstop4h 40mUnited Airlines

Mon 10/207:59 pmIAD - LAS

Nonstop5h 00mUnited Airlines

Deal found 9/15

$263

Wed 10/810:11 amLAS - IAD

1 stop11h 12mAlaska Airlines

Mon 10/205:42 pmIAD - LAS

1 stop8h 45mAlaska Airlines

Deal found 9/15

$272

Thu 10/306:00 amLAS - IAD

1 stop8h 13mHawaiian Airlines

Mon 11/35:40 pmIAD - LAS

1 stop8h 53mHawaiian Airlines

Deal found 9/15

$226

Mon 10/611:10 pmLAS - IAD

1 stop6h 50mDelta

Wed 10/226:18 amIAD - LAS

1 stop6h 57mDelta

Deal found 9/15

$262

Tue 10/78:30 amLAS - IAD

Nonstop4h 40mUnited Airlines

Tue 10/217:59 pmIAD - LAS

Nonstop5h 00mUnited Airlines

Deal found 9/15

$263

Tue 10/710:45 pmLAS - IAD

Nonstop4h 35mUnited Airlines

Sat 10/257:59 pmIAD - LAS

Nonstop5h 00mUnited Airlines

Deal found 9/15

$263

Sat 10/118:30 amLAS - IAD

Nonstop4h 40mUnited Airlines

Mon 10/207:59 pmIAD - LAS

Nonstop5h 00mUnited Airlines

Deal found 9/15

$286

Tue 10/78:30 amLAS - IAD

Nonstop4h 40mUnited Airlines

Sat 10/115:36 pmIAD - LAS

1 stop7h 11mUnited Airlines

Deal found 9/15

$290

Wed 10/2911:50 pmLAS - IAD

Nonstop4h 19mUnited Airlines

Wed 11/56:59 pmIAD - LAS

1 stop7h 53mUnited Airlines

Deal found 9/15

$290

Last-minute flights from Las Vegas to Dulles Intl
Discover last-minute flight deals from Las Vegas to Dulles Intl. Data last updated September 16, 2025 and is based on user searches.

Thu 9/2511:00 pmLAS - IAD

1 stop10h 55mFrontier

Mon 9/291:55 pmIAD - LAS

1 stop10h 28mFrontier

Deal found 9/14

$179

Thu 9/2511:00 pmLAS - IAD

1 stop10h 55mFrontier

Sun 9/287:14 pmIAD - LAS

1 stop16h 56mFrontier

Deal found 9/14

$184

Fri 9/2612:55 amLAS - IAD

1 stop8h 07mFrontier

Sat 10/2512:54 pmIAD - LAS

1 stop8h 27mFrontier

Deal found 9/14

$176

Mon 10/67:00 amLAS - IAD

1 stop13h 16mFrontier

Sat 10/119:38 pmIAD - LAS

1 stop14h 49mFrontier

Deal found 9/15

$180

Fri 10/109:05 pmLAS - IAD

1 stop11h 54mFrontier

Mon 10/2010:04 amIAD - LAS

1 stop8h 52mFrontier

Deal found 9/15

$156

Fri 10/109:05 pmLAS - IAD

1 stop11h 54mFrontier

Tue 10/149:00 amIAD - LAS

1 stop14h 47mFrontier

Deal found 9/16

$182

Thu 10/169:05 pmLAS - IAD

1 stop9h 04mFrontier

Mon 10/204:45 pmIAD - LAS

1 stop8h 03mFrontier

Deal found 9/14

$160

Thu 10/169:05 pmLAS - IAD

1 stop9h 04mFrontier

Sun 10/198:02 pmIAD - LAS

1 stop16h 33mFrontier

Deal found 9/15

$164

Wed 10/2911:50 pmLAS - IAD

Nonstop4h 19mUnited Airlines

Wed 11/57:41 pmIAD - LAS

Nonstop5h 19mUnited Airlines

Deal found 9/15

$163

Wed 10/2911:02 pmLAS - IAD

1 stop16h 25mFrontier

Sun 11/25:00 amIAD - LAS

1 stop8h 34mFrontier

Deal found 9/14

$170

Fri 10/3111:02 pmLAS - IAD

1 stop17h 49mFrontier

Sun 11/25:00 amIAD - LAS

1 stop8h 34mFrontier

Deal found 9/14

$168

One-way flights from Las Vegas to Dulles Intl
Search for one-way flight options from Las Vegas to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 16, 2025.

Fri 11/710:38 pmLAS - IAD

1 stop22h 17mFrontier

Deal found 9/16

$105

Fri 10/1012:55 amLAS - IAD

1 stop8h 04mFrontier

Deal found 9/13

$106

Fri 12/127:25 amLAS - IAD

1 stop7h 05mHawaiian Airlines

Deal found 9/16

$108

Tue 10/287:25 amLAS - IAD

1 stop6h 48mAlaska Airlines

Deal found 9/15

$110

Wed 11/1211:02 pmLAS - IAD

1 stop17h 49mFrontier

Deal found 9/16

$111

Fri 11/1410:38 pmLAS - IAD

1 stop22h 17mFrontier

Deal found 9/16

$112

Tue 11/47:25 amLAS - IAD

1 stop6h 48mAlaska Airlines

Deal found 9/15

$113

Thu 12/47:56 pmLAS - IAD

1 stop18h 34mAlaska Airlines

Deal found 9/16

$114

Sat 12/1310:35 pmLAS - IAD

1 stop22h 44mFrontier

Deal found 9/16

$115

Tue 10/216:51 pmLAS - IAD

1 stop18h 51mAlaska Airlines

Deal found 9/16

$119

Wed 11/512:41 amLAS - IAD

2 stops12h 53mFrontier

Deal found 9/14

$122

Sun 11/1611:02 pmLAS - IAD

1 stop17h 50mFrontier

Deal found 9/14

$123

Cheapflights Fare Finder

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

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 10/22

12:55 am-3:38 pm

2 stops11h 43m

Washington, D.C. Dulles Intl

Mon 10/27

5:00 pm-10:06 pm

1 stop8h 06m

$199

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 11/13

6:00 am-5:13 pm

1 stop8h 13m

Washington, D.C. Dulles Intl

Fri 11/14

5:40 pm-11:33 pm

1 stop8h 53m

$226

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 10/30

6:00 am-5:13 pm

1 stop8h 13m

Washington, D.C. Dulles Intl

Mon 11/3

5:40 pm-11:33 pm

1 stop8h 53m

$226

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Sat 10/11

6:00 am-4:29 pm

1 stop7h 29m

Washington, D.C. Dulles Intl

Tue 10/14

5:52 pm-10:29 pm

1 stop7h 37m

$257

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Mon 10/6

11:10 pm-9:00 am

1 stop6h 50m

Washington, D.C. Dulles Intl

Wed 10/22

6:18 am-10:15 am

1 stop6h 57m

$262

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 10/7

8:30 am-4:10 pm

Nonstop4h 40m

Washington, D.C. Dulles Intl

Mon 10/20

7:59 pm-9:59 pm

Nonstop5h 00m

$263

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 10/7

8:30 am-4:10 pm

Nonstop4h 40m

Washington, D.C. Dulles Intl

Tue 10/21

7:59 pm-9:59 pm

Nonstop5h 00m

$263

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 10/7

10:45 pm-6:20 am

Nonstop4h 35m

Washington, D.C. Dulles Intl

Sat 10/25

7:59 pm-9:59 pm

Nonstop5h 00m

$263

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 10/8

10:11 am-12:23 am

1 stop11h 12m

Washington, D.C. Dulles Intl

Mon 10/20

5:42 pm-11:27 pm

1 stop8h 45m

$272

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Sat 10/11

8:30 am-4:10 pm

Nonstop4h 40m

Washington, D.C. Dulles Intl

Mon 10/20

7:59 pm-9:59 pm

Nonstop5h 00m

$286

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 23 results

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

Cheapflights partnered with top experts to bring you the best recommendations for your Las Vegas to Washington, D.C. Dulles Intl Airport trip

Airports

LAS

Try the self-service TSA screening at LAS for a quicker security process. Follow video instructions to breeze through.

IAD

Use the Silver Line Metro to reach downtown D.C. from IAD in under 40 minutes, a cost-effective option.

Our travel experts

Ramsey Qubein

Expert on IAD and LAS

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

Prices

Airlines

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

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, August is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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?

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 46% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Dulles Intl

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

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,242 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Delta

8.0

Very good

7,957 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

8,924 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Frontier

5.8

Fair

3,174 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

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 7 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 5 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?
Frontier, Hawaiian Airlines, and Delta can get you from Las Vegas to Washington, D.C. Dulles Intl Airport in just under 7h 29m. Your travel time can differ by up to 4h 14m. 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 $141. Additional round-trip tickets that might be worth considering are offered by Southwest and United Airlines, with the lowest prices starting at $204 and $244, respectively. Users have found that Frontier is 64% cheaper than the other options available to this destination.
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 (96%), United Airlines (89%) or Austrian 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 $633, our data shows the cheapest flight currently is $107. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $163 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, August is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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.

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Top 5 airlines flying from Las Vegas to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$141	Average$218	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$204	Average$413	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$244	Average$423	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$256	Average$383	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$368	Average$495	FlexibilityNo cancel fee	On-time71%

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$105+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Las Vegas to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 Tuesday

Cheap flight deals from Las Vegas to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Las Vegas to Dulles Intl

Cheapest flights from Las Vegas to Dulles IntlExplore 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 September 16, 2025.

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 September 16, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Las Vegas to Washington, D.C. Dulles Intl Airport that are best for you.

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

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IAD

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Weekly flight availability from Las Vegas to Washington, D.C. Dulles Intl Airport

Reviews of airlines servicing Dulles Intl

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

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.

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Alternative routes for Las Vegas to Dulles Intl

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Top 5 airlines flying from Las Vegas to Dulles Intl

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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 September 16, 2025.