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 United Airlines and Southwest, with the lowest prices starting at $252 and $256, respectively. Users have found that Frontier is 65% 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.

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 $1,067, our data shows the cheapest flight currently is $88. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $187 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 Austrian Airlines (87%), Brussels Airlines (87%) or United Airlines (82%) 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 is the cheapest day to fly round-trip from Las Vegas to Washington, D.C. Dulles Intl Airport?

Departing on a Wednesday is a good option for securing a great price. You can expect to save up to 65% when planning your travel around this day of the week.

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

Flights from Las Vegas to Washington, D.C. Dulles Intl Airport lean towards being more expensive in November. Prices are generally better when you fly from Las Vegas to Washington, D.C. Dulles Intl Airport in August, with the cheapest ticket starting at $94.

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 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.

$91+ Cheap Flights from Las Vegas to Washington, D.C. Dulles Intl Airport

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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 Tuesday

Cheap flight deals from Las Vegas to Dulles Intl

Round-trip from	$160 (CheapOair)
One-way from	$91 (FlightHub)
Popular in	October
Cheapest in	July
Average price	$348
Good round-trip deal	$166 or less
Good one-way deal	$154 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. 15% potential increase in price ($72 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).

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Average for round-trip flights in August 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 agosto 14, 2025.

vie. 10/1012:55 amLAS - IAD

1 stop8h 04mFrontier

lun. 10/134:45 pmIAD - LAS

1 stop8h 03mFrontier

Deal found 8/14

$160

jue. 8/2810:56 pmLAS - IAD

Nonstop4h 34mFrontier

lun. 9/18:00 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 8/11

$165

mié. 10/111:04 pmLAS - IAD

1 stop16h 20mFrontier

sáb. 10/41:02 pmIAD - LAS

1 stop13h 48mFrontier

Deal found 8/14

$166

jue. 11/61:19 pmLAS - IAD

1 stop7h 52mFrontier

lun. 11/1010:24 amIAD - LAS

1 stop8h 23mFrontier

Deal found 8/14

$168

mié. 9/1011:04 pmLAS - IAD

1 stop16h 20mFrontier

dom. 9/141:55 pmIAD - LAS

1 stop10h 28mFrontier

Deal found 8/14

$170

lun. 8/2510:08 pmLAS - IAD

1 stop20h 31mFrontier

jue. 8/288:00 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 8/14

$172

jue. 10/309:05 pmLAS - IAD

1 stop9h 24mFrontier

lun. 11/310:24 amIAD - LAS

1 stop8h 23mFrontier

Deal found 8/14

$173

mié. 10/112:55 amLAS - IAD

1 stop29h 22mFrontier

lun. 10/66:10 amIAD - LAS

1 stop13h 31mFrontier

Deal found 8/13

$182

vie. 9/512:55 amLAS - IAD

1 stop29h 22mFrontier

vie. 9/127:14 pmIAD - LAS

1 stop23h 25mFrontier

Deal found 8/14

$183

vie. 8/2210:56 pmLAS - IAD

Nonstop4h 34mFrontier

mar. 8/269:30 amIAD - LAS

1 stop9h 22mFrontier

Deal found 8/13

$187

vie. 8/2210:56 pmLAS - IAD

Nonstop4h 34mFrontier

dom. 8/246:10 amIAD - LAS

1 stop17h 49mFrontier

Deal found 8/14

$194

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 agosto 14, 2025.

vie. 10/1012:55 amLAS - IAD

1 stop8h 04mFrontier

lun. 10/134:45 pmIAD - LAS

1 stop8h 03mFrontier

Deal found 8/14

$160

jue. 8/2810:56 pmLAS - IAD

Nonstop4h 34mFrontier

lun. 9/18:00 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 8/11

$165

mié. 10/111:04 pmLAS - IAD

1 stop16h 20mFrontier

sáb. 10/41:02 pmIAD - LAS

1 stop13h 48mFrontier

Deal found 8/14

$166

jue. 11/61:19 pmLAS - IAD

1 stop7h 52mFrontier

lun. 11/1010:24 amIAD - LAS

1 stop8h 23mFrontier

Deal found 8/14

$168

mié. 11/128:49 pmLAS - IAD

1 stop9h 40mFrontier

dom. 11/166:00 amIAD - LAS

1 stop8h 59mFrontier

Deal found 8/14

$170

mié. 9/1011:04 pmLAS - IAD

1 stop16h 20mFrontier

dom. 9/141:55 pmIAD - LAS

1 stop10h 28mFrontier

Deal found 8/14

$170

vie. 9/1911:04 pmLAS - IAD

1 stop16h 20mFrontier

dom. 9/217:09 pmIAD - LAS

1 stop17h 01mFrontier

Deal found 8/14

$172

jue. 10/309:05 pmLAS - IAD

1 stop9h 24mFrontier

lun. 11/310:24 amIAD - LAS

1 stop8h 23mFrontier

Deal found 8/14

$173

vie. 11/710:08 pmLAS - IAD

1 stop22h 47mFrontier

lun. 11/1010:24 amIAD - LAS

1 stop25h 56mFrontier

Deal found 8/13

$177

jue. 9/2511:00 pmLAS - IAD

1 stop10h 55mFrontier

lun. 9/2910:17 amIAD - LAS

1 stop14h 24mFrontier

Deal found 8/14

$177

vie. 9/262:38 pmLAS - IAD

1 stop18h 24mFrontier

dom. 9/286:10 amIAD - LAS

1 stop18h 13mFrontier

Deal found 8/14

$177

mié. 10/112:55 amLAS - IAD

1 stop29h 22mFrontier

lun. 10/66:10 amIAD - LAS

1 stop13h 31mFrontier

Deal found 8/13

$182

Last-minute flights from Las Vegas to Dulles Intl
Discover last-minute flight deals from Las Vegas to Dulles Intl. Data last updated agosto 14, 2025 and is based on user searches.

sáb. 8/1611:00 pmLAS - IAD

Nonstop4h 34mFrontier

mié. 8/209:30 amIAD - LAS

1 stop11h 48mFrontier

Deal found 8/11

$205

mié. 8/2010:56 pmLAS - IAD

Nonstop4h 34mFrontier

dom. 8/246:10 amIAD - LAS

1 stop17h 49mFrontier

Deal found 8/13

$196

mié. 8/2010:56 pmLAS - IAD

Nonstop4h 34mFrontier

mié. 8/279:30 amIAD - LAS

1 stop11h 48mFrontier

Deal found 8/13

$201

jue. 8/2110:56 pmLAS - IAD

Nonstop4h 34mFrontier

sáb. 8/236:10 amIAD - LAS

1 stop15h 54mFrontier

Deal found 8/11

$208

jue. 8/2110:56 pmLAS - IAD

Nonstop4h 34mFrontier

lun. 8/255:37 pmIAD - LAS

1 stop25h 15mFrontier

Deal found 8/12

$212

vie. 8/2210:56 pmLAS - IAD

Nonstop4h 34mFrontier

mar. 8/269:30 amIAD - LAS

1 stop9h 22mFrontier

Deal found 8/13

$187

vie. 8/2210:56 pmLAS - IAD

Nonstop4h 34mFrontier

dom. 8/246:10 amIAD - LAS

1 stop17h 49mFrontier

Deal found 8/14

$194

vie. 8/2212:59 amLAS - IAD

1 stop8h 03mFrontier

lun. 8/258:00 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 8/13

$204

vie. 8/2212:59 amLAS - IAD

1 stop8h 03mFrontier

mié. 8/279:30 amIAD - LAS

1 stop11h 48mFrontier

Deal found 8/12

$225

vie. 8/2210:56 pmLAS - IAD

Nonstop4h 34mFrontier

jue. 9/117:14 pmIAD - LAS

1 stop16h 56mFrontier

Deal found 8/14

$227

dom. 8/2412:59 amLAS - IAD

2 stops16h 49mFrontier

jue. 8/288:00 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 8/14

$216

lun. 8/2510:08 pmLAS - IAD

1 stop20h 31mFrontier

jue. 8/288:00 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 8/14

$172

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 agosto 14, 2025.

vie. 9/192:38 pmLAS - IAD

1 stop18h 24mFrontier

Deal found 8/14

$91

jue. 9/411:00 pmLAS - IAD

1 stop10h 55mFrontier

Deal found 8/14

$93

mié. 9/1711:04 pmLAS - IAD

1 stop16h 20mFrontier

Deal found 8/14

$94

jue. 9/1111:00 pmLAS - IAD

1 stop10h 55mFrontier

Deal found 8/14

$95

lun. 9/2911:00 pmLAS - IAD

1 stop17h 55mFrontier

Deal found 8/13

$97

sáb. 12/61:50 pmLAS - IAD

Nonstop4h 20mUnited Airlines

Deal found 8/12

$99

vie. 11/1412:58 amLAS - IAD

1 stop8h 01mMultiple Airlines

Deal found 8/12

$100

mié. 8/273:15 pmLAS - IAD

1 stop26h 33mFrontier

Deal found 8/14

$101

mié. 12/106:00 amLAS - IAD

1 stop8h 25mHawaiian Airlines

Deal found 8/13

$102

vie. 10/311:20 pmLAS - IAD

Nonstop4h 35mUnited Airlines

Deal found 8/13

$104

jue. 11/136:00 amLAS - IAD

1 stop8h 13mHawaiian Airlines

Deal found 8/12

$107

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

vie. 10/10

12:55 am-11:59 am

1 stop8h 04m

Washington, D.C. Dulles Intl

lun. 10/13

4:45 pm-9:48 pm

1 stop8h 03m

$160

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

jue. 8/28

10:56 pm-6:30 am

Nonstop4h 34m

Washington, D.C. Dulles Intl

lun. 9/1

8:00 am-9:59 am

Nonstop4h 59m

$165

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

mié. 10/1

11:04 pm-6:24 pm

1 stop16h 20m

Washington, D.C. Dulles Intl

sáb. 10/4

1:02 pm-11:50 pm

1 stop13h 48m

$166

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

jue. 11/6

1:19 pm-12:11 am

1 stop7h 52m

Washington, D.C. Dulles Intl

lun. 11/10

10:24 am-3:47 pm

1 stop8h 23m

$168

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

mié. 11/12

8:49 pm-9:29 am

1 stop9h 40m

Washington, D.C. Dulles Intl

dom. 11/16

6:00 am-11:59 am

1 stop8h 59m

$170

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

mié. 9/10

11:04 pm-6:24 pm

1 stop16h 20m

Washington, D.C. Dulles Intl

dom. 9/14

1:55 pm-9:23 pm

1 stop10h 28m

$170

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

vie. 9/19

11:04 pm-6:24 pm

1 stop16h 20m

Washington, D.C. Dulles Intl

dom. 9/21

7:09 pm-9:10 am

1 stop17h 01m

$172

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

jue. 10/30

9:05 pm-9:29 am

1 stop9h 24m

Washington, D.C. Dulles Intl

lun. 11/3

10:24 am-3:47 pm

1 stop8h 23m

$173

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

vie. 11/7

10:08 pm-11:55 pm

1 stop22h 47m

Washington, D.C. Dulles Intl

lun. 11/10

10:24 am-9:20 am

1 stop25h 56m

$177

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

jue. 9/25

11:00 pm-12:55 pm

1 stop10h 55m

Washington, D.C. Dulles Intl

lun. 9/29

10:17 am-9:41 pm

1 stop14h 24m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 24 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

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, July is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $302). 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 49% 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

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,244 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

8.0

Very good

7,980 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

8,916 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.8

Fair

3,217 reviews

Southwest

8.0

Very good

4,244 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

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 5 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.
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 United Airlines and Southwest, with the lowest prices starting at $252 and $256, respectively. Users have found that Frontier is 65% 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 Austrian Airlines (87%), Brussels Airlines (87%) or United Airlines (82%) 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 $1,067, our data shows the cheapest flight currently is $88. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $187 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, July is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $302). 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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Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Las Vegas to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$141	Average$217	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$252	Average$429	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$256	Average$426	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$258	Average$373	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$368	Average$495	FlexibilityNo cancel fee	On-time71%

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$91+ 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 9/17. 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 agosto 14, 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 agosto 14, 2025.

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

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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 August 8, 2025.

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

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 agosto 14, 2025.

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.

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

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

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

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

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

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

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

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

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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 agosto 14, 2025.