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

Flying on United Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $159. Additional round-trip tickets that might be worth considering are offered by Frontier and Alaska Airlines, with the lowest prices starting at $165 and $201, respectively. Users have found that United Airlines is 61% 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 United Airlines, with whom users have recently found tickets for as low as $80. However, be on the lookout for offers from Frontier and Hawaiian Airlines, 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 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 $789, our data shows the cheapest flight currently is $69. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $156 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 (85%), Brussels Airlines (85%) or United Airlines (85%) 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 56% 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 December. 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 $159.

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 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.

$80+ Flights from Las Vegas to Washington, D.C. Dulles Intl Airport

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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 May or July, booked 67 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Las Vegas to Dulles Intl

Round-trip from	$159 (United Airlines)
One-way from	$80 (United Airlines)
Popular in	October
Cheapest in	May
Average price	$357
Good round-trip deal	$198 or less
Good one-way deal	$109 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. 12% potential increase in price ($57 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

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Average for round-trip flights in June 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 June 19, 2025.

Thu 7/3111:00 pmLAS - IAD

Nonstop4h 34mFrontier

Tue 8/57:30 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 6/18

$159

Fri 7/118:30 amLAS - IAD

Nonstop4h 37mUnited Airlines

Sat 7/125:55 pmIAD - LAS

Nonstop5h 04mUnited Airlines

Deal found 6/18

$179

Thu 7/108:30 amLAS - IAD

1 stop7h 49mAlaska Airlines

Mon 7/147:59 pmIAD - LAS

1 stop17h 33mAlaska Airlines

Deal found 6/19

$201

Tue 8/58:30 pmLAS - IAD

1 stop7h 23mMultiple Airlines

Tue 8/127:30 amIAD - LAS

Nonstop4h 59mMultiple Airlines

Deal found 6/19

$214

Mon 8/1811:31 pmLAS - IAD

1 stop6h 41mDelta

Sat 8/305:25 pmIAD - LAS

1 stop7h 21mDelta

Deal found 6/18

$257

Wed 8/207:35 amLAS - IAD

1 stop6h 40mSouthwest

Wed 8/275:45 amIAD - LAS

2 stops12h 45mSouthwest

Deal found 6/18

$268

Thu 7/1711:55 pmLAS - IAD

1 stop9h 34mSun Country Air

Sun 7/2012:40 pmIAD - LAS

1 stop12h 59mSun Country Air

Deal found 6/18

$275

Sat 8/167:50 amLAS - IAD

1 stop8h 06mAmerican Airlines

Tue 9/26:27 amIAD - LAS

2 stops11h 21mAmerican Airlines

Deal found 6/19

$362

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 June 19, 2025.

Fri 8/1511:59 pmLAS - IAD

Nonstop4h 35mUnited Airlines

Wed 9/37:59 pmIAD - LAS

Nonstop4h 59mUnited Airlines

Deal found 6/17

$159

Tue 7/2911:00 pmLAS - IAD

Nonstop4h 34mFrontier

Mon 8/47:30 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 6/19

$165

Thu 8/78:30 amLAS - IAD

1 stop7h 49mAlaska Airlines

Tue 8/125:25 pmIAD - LAS

1 stop19h 12mAlaska Airlines

Deal found 6/17

$201

Tue 8/58:30 pmLAS - IAD

1 stop7h 23mMultiple Airlines

Tue 8/127:30 amIAD - LAS

Nonstop4h 59mMultiple Airlines

Deal found 6/19

$214

Fri 8/1511:55 amLAS - IAD

1 stop7h 55mSouthwest

Wed 9/35:45 amIAD - LAS

1 stop8h 00mSouthwest

Deal found 6/17

$257

Thu 7/31:05 pmLAS - IAD

1 stop7h 38mDelta

Sat 7/56:00 amIAD - LAS

1 stop7h 53mDelta

Deal found 6/17

$267

Thu 7/1711:55 pmLAS - IAD

1 stop9h 34mSun Country Air

Sun 8/1011:04 amIAD - LAS

1 stop25h 50mSun Country Air

Deal found 6/17

$275

Wed 10/1512:14 amLAS - IAD

1 stop7h 31mAmerican Airlines

Mon 10/205:31 pmIAD - LAS

1 stop8h 52mAmerican Airlines

Deal found 6/19

$357

Last-minute flights from Las Vegas to Dulles Intl
Discover last-minute flight deals from Las Vegas to Dulles Intl. Data last updated June 19, 2025 and is based on user searches.

Tue 6/2412:50 amLAS - IAD

1 stop7h 32mDelta

Mon 6/305:29 pmIAD - LAS

1 stop8h 16mDelta

Deal found 6/19

$357

Wed 6/257:58 pmLAS - IAD

1 stop17h 27mAlaska Airlines

Wed 7/28:10 amIAD - LAS

1 stop12h 21mAlaska Airlines

Deal found 6/18

$342

Wed 6/257:00 amLAS - IAD

1 stop9h 44mAmerican Airlines

Wed 7/26:55 amIAD - LAS

2 stops10h 48mAmerican Airlines

Deal found 6/18

$402

Thu 6/267:45 amLAS - IAD

2 stops8h 20mSouthwest

Sun 6/295:50 amIAD - LAS

1 stop6h 35mSouthwest

Deal found 6/18

$482

Fri 6/2711:02 pmLAS - IAD

Nonstop4h 28mFrontier

Tue 7/297:30 amIAD - LAS

Nonstop4h 59mFrontier

Deal found 6/18

$228

Fri 6/2711:59 pmLAS - IAD

1 stop18h 38mSun Country Air

Mon 7/281:34 pmIAD - LAS

1 stop6h 47mSun Country Air

Deal found 6/18

$315

Fri 6/274:27 pmLAS - IAD

2 stops18h 28mMultiple Airlines

Mon 6/3010:13 amIAD - LAS

1 stop13h 57mMultiple Airlines

Deal found 6/17

$379

Sat 6/2811:59 pmLAS - IAD

Nonstop4h 35mUnited Airlines

Fri 8/110:10 pmIAD - LAS

Nonstop5h 04mUnited Airlines

Deal found 6/18

$437

Thu 7/31:05 pmLAS - IAD

1 stop7h 38mDelta

Wed 7/305:23 pmIAD - LAS

1 stop7h 17mDelta

Deal found 6/18

$257

Thu 7/108:30 amLAS - IAD

1 stop7h 49mAlaska Airlines

Mon 7/147:59 pmIAD - LAS

1 stop17h 33mAlaska Airlines

Deal found 6/19

$201

Thu 7/107:45 amLAS - IAD

2 stops8h 20mSouthwest

Wed 7/165:35 pmIAD - LAS

1 stop8h 40mSouthwest

Deal found 6/18

$292

Fri 7/118:30 amLAS - IAD

Nonstop4h 37mUnited Airlines

Sat 7/125:55 pmIAD - LAS

Nonstop5h 04mUnited Airlines

Deal found 6/18

$179

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 June 19, 2025.

Fri 9/128:30 amLAS - IAD

Nonstop4h 39mUnited Airlines

Deal found 6/17

$80

Thu 7/1711:00 pmLAS - IAD

Nonstop4h 34mFrontier

Deal found 6/19

$84

Wed 10/297:25 amLAS - IAD

1 stop6h 41mHawaiian Airlines

Deal found 6/19

$95

Thu 9/185:14 pmLAS - IAD

1 stop20h 33mAlaska Airlines

Deal found 6/17

$106

Fri 10/36:30 amLAS - IAD

1 stop11h 16mAllegiant Air

Deal found 6/17

$121

Thu 7/312:50 amLAS - IAD

1 stop7h 32mDelta

Deal found 6/17

$129

Fri 7/47:30 amLAS - IAD

2 stops11h 40mSouthwest

Deal found 6/17

$135

Sun 7/1311:59 pmLAS - IAD

1 stop8h 44mSun Country Air

Deal found 6/18

$143

Thu 10/23:06 pmLAS - IAD

2 stops21h 43mMultiple Airlines

Deal found 6/17

$151

Fri 9/198:30 amLAS - IAD

2 stops11h 19mAmerican Airlines

Deal found 6/18

$183

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

Thu 7/31

11:00 pm-6:34 am

Nonstop4h 34m

Washington, D.C. Dulles Intl

Tue 8/5

7:30 am-9:29 am

Nonstop4h 59m

$159

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Fri 7/11

8:30 am-4:07 pm

Nonstop4h 37m

Washington, D.C. Dulles Intl

Sat 7/12

5:55 pm-7:59 pm

Nonstop5h 04m

$179

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 7/10

8:30 am-7:19 pm

1 stop7h 49m

Washington, D.C. Dulles Intl

Mon 7/14

7:59 pm-10:32 am

1 stop17h 33m

$201

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 8/5

8:30 pm-6:53 am

1 stop7h 23m

Washington, D.C. Dulles Intl

Tue 8/12

7:30 am-9:29 am

Nonstop4h 59m

$214

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Mon 8/18

12:35 am-11:20 am

1 stop7h 45m

Washington, D.C. Dulles Intl

Fri 8/22

5:25 pm-10:21 pm

1 stop7h 56m

$257

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Wed 8/20

7:35 am-5:15 pm

1 stop6h 40m

Washington, D.C. Dulles Intl

Wed 8/27

5:45 am-5:00 pm

2 stops14h 15m

$268

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 7/17

11:55 pm-12:29 pm

1 stop9h 34m

Washington, D.C. Dulles Intl

Sun 7/20

12:40 pm-10:39 pm

1 stop12h 59m

$275

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Tue 7/8

10:37 pm-8:33 am

1 stop6h 56m

Washington, D.C. Dulles Intl

Wed 7/9

11:49 am-5:58 pm

2 stops9h 09m

$356

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Sat 7/26

11:59 pm-7:34 am

Nonstop4h 35m

$80

Las VegasWashington, D.C.

LAS - IAD

LASIAD

Las Vegas Harry Reid Intl

Thu 7/17

11:00 pm-6:34 am

Nonstop4h 34m

$84

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 18 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, August is the cheapest month in which you can book a flight from Las Vegas to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $347). 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 afternoon. By choosing this option you can save up to 41% on the cost of your flight, compared to a flight in the morning.

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 Tuesday afternoons when fares are most often at their lowest. Sunday at noon 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 Wednesday (8 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Dulles Intl by month

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.

Temperature in Dulles Intl by month

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).

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Las Vegas to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,284 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,966 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Hawaiian Airlines

7.8

Good

2,509 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,818 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 6 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 United Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at $159. Additional round-trip tickets that might be worth considering are offered by Frontier and Alaska Airlines, with the lowest prices starting at $165 and $201, respectively. Users have found that United Airlines is 61% 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 United Airlines, with whom users have recently found tickets for as low as $80. However, be on the lookout for offers from Frontier and Hawaiian Airlines, 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 Austrian Airlines (85%), Brussels Airlines (85%) or United Airlines (85%) 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 $789, our data shows the cheapest flight currently is $69. When looking at the most popular route, (Las Vegas Harry Reid Intl - Washington, D.C. Dulles Intl), you can expect to pay $156 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 $309). Flying from Las Vegas to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $347). 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

Arlington

Woodbridge

Alexandria

Tysons

Silver Spring

Linthicum Heights

Fredericksburg

Fairfax

Gaithersburg

Easton

Towson

Manassas

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National Harbor

Dundalk

Waldorf

Bowie

Hanover

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$134	Average$214	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$258	Average$356	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$270	Average$455	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$332	Average$426	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$368	Average$495	FlexibilityNo cancel fee	On-time71%

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$80+ 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 9/12. 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 May or July, booked 67 days in advance, depart on a Thursday or Wednesday 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 June 19, 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 June 19, 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

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

IAD

Our travel experts

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.

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 June 13, 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 June 19, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Las Vegas to Dulles Intl. Price data was last updated on June 15, 2025.

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

Explore weekly flight availability from Las Vegas to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 19, 2025.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Las Vegas to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of 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 cheapest airlines to fly from Las Vegas to Washington, D.C. Dulles Intl Airport one-way?

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 June 19, 2025.