Which airline has the best punctuality record on Washington, D.C. to Las Vegas flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 16% of flights being delayed.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to Las Vegas?

Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 2h 26m.

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to Las Vegas?

San Diego (SAN) – chosen by Cheapflights users on 50% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Las Vegas on Cheapflights.

What is the most punctual flight time for Washington, D.C. to Las Vegas flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

How often are flights from Washington, D.C. to Las Vegas delayed?

About 17% of weekly flights between Washington, D.C. and Las Vegas have experienced delays in the past year, with the average delay time being 178 minutes.

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to Las Vegas?

Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 7h 51m.

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to Las Vegas?

Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $184.

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

There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Las Vegas in 10h 30m. Fly via Delta to get the fastest option. Airlines will cover a distance of 2059 mi.

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

Flying on Spirit Airlines is currently your cheapest option to Las Vegas, with prices starting at $88. Additional round-trip tickets that might be worth considering are offered by Frontier and United Airlines, with the lowest prices starting at $97 and $224, respectively. These flights start at 77% lower than the current average price 3 months from now.

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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $62. However, be on the lookout for offers from United Airlines and Southwest, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Las Vegas for a low price.

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

The most flights from IAD to LAS are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

In terms of precipitation, rainfall in Las Vegas ranges from 0.1 - 0.8 inches per month. February is typically the wettest month, when rainfall can reach 0.8 in. May is typically the driest time to visit Las Vegas when rainfall is around 0.1 in.

If weather is an important factor for your trip to Las Vegas, 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 93.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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

Looking at all options, your cheapest flight can be booked for $161. While the most popular route (Washington, D.C. Dulles Intl - Las Vegas Harry Reid Intl) can be booked for $168 on average, our data indicates $1,320 when flying from Washington, D.C. Dulles Intl Airport to Las Vegas.

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

The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Las Vegas are ITA Airways (100%), Ethiopian Air (90%) and United Airlines (86%).

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

Consider United Airlines, Frontier or Southwest when booking your flight. These represent the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to Las Vegas.

Most accurate provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Las Vegas flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Washington, D.C. Dulles Intl Airport-Las Vegas flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Las Vegas flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Las Vegas flights, Cheapflights users trust CheapOair the most. CheapOair 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 Washington, D.C. Dulles Intl Airport-Las Vegas flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Las Vegas Harry Reid Intl (LAS), located 6.2 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Las Vegas. 7 airlines have flights to Harry Reid Intl from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl should not be difficult; the airport handles an average of 5 inbound flights from Washington, D.C. Dulles Intl per day.

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

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

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

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

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

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

$113+ Flights from Washington, D.C. Dulles Intl Airport to Las Vegas

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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

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.

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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl are usually found in August or July, booked 20 days in advance, depart on a Saturday or Tuesday and return on a Thursday

Cheap flight deals from Dulles Intl to Las Vegas

Cheapest flights from Dulles Intl to Las Vegas
Explore the most affordable flight options available from Dulles Intl to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Wed 12/317:01 pmIAD - LAS

2 stops17h 44mFrontier

Wed 1/711:03 pmLAS - IAD

1 stop29h 52mFrontier

Deal found 12/25

$322

Mon 12/296:05 amIAD - LAS

1 stop12h 53mFrontier

Thu 1/86:15 amLAS - IAD

1 stop11h 41mFrontier

Deal found 12/26

$353

Fri 12/266:05 amIAD - LAS

1 stop12h 53mFrontier

Wed 1/710:58 pmLAS - IAD

1 stop9h 30mFrontier

Deal found 12/25

$373

Tue 12/306:34 amIAD - LAS

1 stop12h 24mFrontier

Wed 1/710:58 pmLAS - IAD

1 stop9h 30mFrontier

Deal found 12/26

$380

Mon 12/296:05 amIAD - LAS

1 stop12h 53mFrontier

Mon 1/56:05 amLAS - IAD

1 stop9h 11mFrontier

Deal found 12/26

$383

Fri 12/266:05 amIAD - LAS

1 stop12h 53mFrontier

Mon 1/56:05 amLAS - IAD

1 stop9h 11mFrontier

Deal found 12/25

$403

Tue 12/306:34 amIAD - LAS

1 stop12h 24mFrontier

Mon 1/56:05 amLAS - IAD

1 stop9h 11mFrontier

Deal found 12/26

$413

Wed 12/317:01 pmIAD - LAS

1 stop23h 57mMultiple Airlines

Mon 1/58:59 pmLAS - IAD

2 stops18h 53mMultiple Airlines

Deal found 12/25

$431

Mon 12/296:05 amIAD - LAS

1 stop12h 53mFrontier

Fri 1/26:05 amLAS - IAD

1 stop9h 11mFrontier

Deal found 12/26

$432

Sun 12/285:35 amIAD - LAS

1 stop13h 23mFrontier

Mon 1/56:05 amLAS - IAD

1 stop9h 11mFrontier

Deal found 12/26

$433

Fri 12/266:05 amIAD - LAS

1 stop12h 53mFrontier

Thu 1/16:05 amLAS - IAD

1 stop9h 11mFrontier

Deal found 12/25

$452

Best flights from Dulles Intl to Las Vegas
Discover carefully curated flight deals from Dulles Intl to Las Vegas that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 28, 2025.

Tue 2/37:30 amIAD - LAS

1 stop10h 30mDelta

Tue 2/1011:00 amLAS - IAD

1 stop9h 10mDelta

Deal found 12/26

$285

Sun 1/255:17 pmIAD - LAS

1 stop7h 42mUnited Airlines

Tue 1/278:30 amLAS - IAD

Nonstop4h 30mUnited Airlines

Deal found 12/26

$317

Wed 2/187:05 amIAD - LAS

1 stop16h 17mAlaska Airlines

Sat 2/216:00 amLAS - IAD

1 stop8h 27mAlaska Airlines

Deal found 12/27

$324

Thu 2/55:30 amIAD - LAS

1 stop6h 50mSouthwest

Sat 2/79:15 amLAS - IAD

2 stops9h 55mSouthwest

Deal found 12/27

$336

Wed 3/117:00 amIAD - LAS

1 stop10h 47mDelta

Tue 3/174:05 pmLAS - IAD

1 stop28h 44mDelta

Deal found 12/26

$295

Wed 1/283:19 pmIAD - LAS

1 stop8h 08mUnited Airlines

Sat 1/311:55 pmLAS - IAD

Nonstop4h 30mUnited Airlines

Deal found 12/28

$317

Sat 1/246:00 amIAD - LAS

2 stops12h 00mDelta

Wed 1/2811:00 amLAS - IAD

1 stop9h 10mDelta

Deal found 12/27

$300

Wed 2/257:05 amIAD - LAS

2 stops16h 09mAlaska Airlines

Mon 3/26:58 pmLAS - IAD

1 stop19h 29mAlaska Airlines

Deal found 12/26

$330

Wed 2/187:30 amIAD - LAS

1 stop10h 32mDelta

Mon 2/2311:17 pmLAS - IAD

1 stop9h 18mDelta

Deal found 12/27

$306

Wed 2/257:30 amIAD - LAS

1 stop17h 30mDelta

Mon 3/210:10 pmLAS - IAD

1 stop8h 03mDelta

Deal found 12/27

$306

Sun 2/86:00 amIAD - LAS

1 stop7h 22mDelta

Tue 2/102:10 pmLAS - IAD

1 stop6h 38mDelta

Deal found 12/26

$327

Thu 2/57:00 amIAD - LAS

1 stop8h 41mDelta

Sun 2/89:35 amLAS - IAD

1 stop6h 26mDelta

Deal found 12/27

$327

Last-minute flights from Dulles Intl to Las Vegas
Discover last-minute flight deals from Dulles Intl to Las Vegas. Data last updated December 28, 2025 and is based on user searches.

Mon 1/59:58 pmIAD - LAS

1 stop14h 45mFrontier

Sat 1/1010:58 pmLAS - IAD

1 stop9h 30mFrontier

Deal found 12/26

$253

Mon 1/59:58 pmIAD - LAS

1 stop14h 45mFrontier

Thu 1/86:15 amLAS - IAD

1 stop11h 41mFrontier

Deal found 12/26

$254

Wed 1/76:00 amIAD - LAS

1 stop13h 57mFrontier

Mon 1/1211:33 pmLAS - IAD

1 stop9h 10mFrontier

Deal found 12/26

$252

Fri 1/98:40 amIAD - LAS

1 stop28h 28mFrontier

Fri 1/1611:03 pmLAS - IAD

1 stop30h 01mFrontier

Deal found 12/27

$251

Sun 1/1811:00 amIAD - LAS

1 stop12h 52mMultiple Airlines

Sun 1/2511:51 amLAS - IAD

1 stop19h 04mMultiple Airlines

Deal found 12/26

$248

Mon 1/198:51 amIAD - LAS

1 stop16h 41mFrontier

Thu 1/2211:59 amLAS - IAD

1 stop18h 56mFrontier

Deal found 12/26

$244

Mon 1/198:51 amIAD - LAS

1 stop16h 41mFrontier

Fri 1/3011:36 pmLAS - IAD

1 stop8h 08mFrontier

Deal found 12/26

$249

Tue 1/206:04 pmIAD - LAS

1 stop20h 07mHawaiian Airlines

Sat 1/245:42 pmLAS - IAD

1 stop19h 44mHawaiian Airlines

Deal found 12/26

$245

Tue 1/2011:00 amIAD - LAS

1 stop14h 28mMultiple Airlines

Sat 1/241:01 amLAS - IAD

2 stops35h 02mMultiple Airlines

Deal found 12/27

$246

Fri 1/2310:50 amIAD - LAS

1 stop10h 20mFrontier

Thu 1/297:00 amLAS - IAD

1 stop23h 55mFrontier

Deal found 12/26

$242

Sat 1/2411:39 amIAD - LAS

1 stop14h 19mFrontier

Sun 2/111:59 pmLAS - IAD

1 stop13h 29mFrontier

Deal found 12/26

$250

Sat 1/3111:39 amIAD - LAS

1 stop14h 18mMultiple Airlines

Mon 2/26:00 amLAS - IAD

1 stop8h 04mMultiple Airlines

Deal found 12/26

$243

One-way flights from Dulles Intl to Las Vegas
Search for one-way flight options from Dulles Intl to Las Vegas. Find affordable one-way fares based on user searches. Data last updated December 28, 2025.

Sun 2/157:20 pmIAD - LAS

1 stop23h 11mFrontier

Deal found 12/26

$113

Sat 1/2411:39 amIAD - LAS

1 stop14h 19mFrontier

Deal found 12/27

$115

Thu 1/89:59 pmIAD - LAS

1 stop13h 20mFrontier

Deal found 12/27

$117

Fri 1/98:40 amIAD - LAS

1 stop28h 28mFrontier

Deal found 12/26

$118

Sun 2/89:18 amIAD - LAS

2 stops17h 26mFrontier

Deal found 12/27

$119

Fri 1/168:53 pmIAD - LAS

1 stop17h 49mFrontier

Deal found 12/25

$120

Fri 2/65:33 pmIAD - LAS

1 stop8h 24mFrontier

Deal found 12/27

$125

Wed 3/256:20 amIAD - LAS

1 stop19h 28mFrontier

Deal found 12/27

$127

Fri 1/92:58 pmIAD - LAS

2 stops22h 10mMultiple Airlines

Deal found 12/27

$128

Sat 1/2411:39 amIAD - LAS

3 stops25h 52mMultiple Airlines

Deal found 12/27

$129

Find flight deals from Dulles Intl to Las Vegas

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$242 (Kiwi.com)
One-way from	$113 (Kiwi.com)
Popular in	December
Cheapest in	August
Average price	$534
Good round-trip deal	$407 or less
Good one-way deal	$250 or less

Provider with most accurate pricing for Washington, D.C. Dulles Intl-Las Vegas Harry Reid Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Las Vegas Harry Reid Intl flights.

Search Deals

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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($70 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 December 2025

Search Deals

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

Search Deals

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

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 2/3

7:30 am-3:00 pm

1 stop10h 30m

Las Vegas Harry Reid Intl

Tue 2/10

11:00 am-11:10 pm

1 stop9h 10m

$285

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 3/11

7:00 am-2:47 pm

1 stop10h 47m

Las Vegas Harry Reid Intl

Tue 3/17

4:05 pm-11:49 pm

1 stop28h 44m

$295

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 1/24

6:00 am-3:00 pm

2 stops12h 00m

Las Vegas Harry Reid Intl

Wed 1/28

11:00 am-11:10 pm

1 stop9h 10m

$300

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 2/18

7:30 am-3:02 pm

1 stop10h 32m

Las Vegas Harry Reid Intl

Mon 2/23

11:17 pm-11:35 am

1 stop9h 18m

$306

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 2/25

7:30 am-10:00 pm

1 stop17h 30m

Las Vegas Harry Reid Intl

Mon 3/2

10:10 pm-9:13 am

1 stop8h 03m

$306

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 1/25

5:17 pm-9:59 pm

1 stop7h 42m

Las Vegas Harry Reid Intl

Tue 1/27

8:30 am-4:00 pm

Nonstop4h 30m

$317

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 1/28

3:19 pm-8:27 pm

1 stop8h 08m

Las Vegas Harry Reid Intl

Sat 1/31

1:55 pm-9:25 pm

Nonstop4h 30m

$317

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 2/18

7:05 am-8:22 pm

1 stop16h 17m

Las Vegas Harry Reid Intl

Sat 2/21

6:00 am-5:27 pm

1 stop8h 27m

$324

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 2/8

6:00 am-10:22 am

1 stop7h 22m

Las Vegas Harry Reid Intl

Tue 2/10

2:10 pm-11:48 pm

1 stop6h 38m

$327

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 2/5

7:00 am-12:41 pm

1 stop8h 41m

Las Vegas Harry Reid Intl

Sun 2/8

9:35 am-7:01 pm

1 stop6h 26m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 24 results

Compare providers for flights from Dulles Intl to Las Vegas

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Las Vegas in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust Score*2 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
CheapOair	Price Accuracy3 stars	Trust 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 Washington, D.C. Dulles Intl Airport-Las Vegas flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Washington, D.C. Dulles Intl Airport-Las Vegas flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Las Vegas flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Las Vegas flights, Cheapflights users trust CheapOair the most. CheapOair 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 Washington, D.C. Dulles Intl Airport-Las Vegas 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 Dulles Intl to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Las Vegas

Prices

Airlines

Delays

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

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Las Vegas may vary depending on when you book. For the best chance of a lower fare, look to book 20 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $119). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $309). 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 IAD to LAS?

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Las Vegas is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 23% on airfare.

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

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Las Vegas flight should consider departing on Saturday mornings 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.

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

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

Airports

IAD

Expect long security queues at IAD, especially in the afternoon. Plan extra time to navigate the terminals efficiently.

LAS

For a quick exit from LAS, rideshares are available but pick up in the parking garage, which can be a long walk in summer.

Our travel experts

Ramsey Qubein

Expert on IAD and LAS

Reviews of airlines servicing Las Vegas

Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Washington, D.C. Dulles Intl Airport to Las Vegas to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

8.0

Very good

4,256 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Delta

7.9

Good

8,019 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,113 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,072 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,065 reviews

Southwest

8.0

Very good

4,256 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

What airport do you fly into for flights to Las Vegas from Washington, D.C. Dulles Intl?
Las Vegas Harry Reid Intl (LAS), located 6.2 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Las Vegas. 7 airlines have flights to Harry Reid Intl from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl should not be difficult; the airport handles an average of 5 inbound flights from Washington, D.C. Dulles Intl per day.
How long is the flight from Washington, D.C. Dulles Intl Airport to Las Vegas?
There are many flights that can get you from Washington, D.C. Dulles Intl Airport to Las Vegas in 10h 30m. Fly via Delta to get the fastest option. Airlines will cover a distance of 2059 mi.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Las Vegas round-trip?
Flying on Spirit Airlines is currently your cheapest option to Las Vegas, with prices starting at $88. Additional round-trip tickets that might be worth considering are offered by Frontier and United Airlines, with the lowest prices starting at $97 and $224, respectively. These flights start at 77% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Las Vegas one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $62. However, be on the lookout for offers from United Airlines and Southwest, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Las Vegas for a low price.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Las Vegas?
The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Las Vegas are ITA Airways (100%), Ethiopian Air (90%) and United Airlines (86%).
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Las Vegas?
Looking at all options, your cheapest flight can be booked for $161. While the most popular route (Washington, D.C. Dulles Intl - Las Vegas Harry Reid Intl) can be booked for $168 on average, our data indicates $1,320 when flying from Washington, D.C. Dulles Intl Airport to Las Vegas.
Can I find deals for flights from Dulles Intl to Las Vegas that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Las Vegas?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Las Vegas.
Can I find deals for business class flights from Dulles Intl to Las Vegas?
Yes. Cheapflights offers flight deals from Dulles Intl to Las Vegas 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 Washington, D.C. Dulles Intl Airport to Las Vegas?
Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $119). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $309). 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 7 airlines flying from Dulles Intl to Las Vegas

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$91	Average$278	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$120	Average$208	FlexibilityNo cancel fee	On-time62%
Alaska Airlines	Cheapest$230	Average$312	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$233	Average$452	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$256	Average$452	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$256	Average$374	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$368	Average$497	FlexibilityNo cancel fee	On-time71%

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$113+ Cheap flights from Dulles Intl (IAD) to Las Vegas (LAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/15. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl are usually found in August or July, booked 20 days in advance, depart on a Saturday or Tuesday and return on a Thursday

Cheap flight deals from Dulles Intl to Las Vegas

Cheapest flights from Dulles Intl to Las VegasExplore the most affordable flight options available from Dulles Intl to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

Explore the most affordable flight options available from Dulles Intl to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

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Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Las Vegas in December.

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

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Cheapflights Insights

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

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

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

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

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

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

How often are flights from Washington, D.C. to Las Vegas delayed?

What is the most punctual flight time for Washington, D.C. to Las Vegas flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on Washington, D.C. to Las Vegas flights?

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to Las Vegas?

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to Las Vegas?

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to Las Vegas?

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to Las Vegas?

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

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Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Las Vegas. 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 into for flights to Las Vegas from Washington, D.C. Dulles Intl?

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

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

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

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

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

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

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

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

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

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Top 7 airlines flying from Dulles Intl to Las Vegas

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Cheapest flights from Dulles Intl to Las Vegas
Explore the most affordable flight options available from Dulles Intl to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.