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$107+ 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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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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 February or January, booked 70 days in advance, depart on a Tuesday or Saturday and return on a Thursday

Cheap flight deals from Dulles Intl to Las Vegas

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Las Vegas (LAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$178
(Frontier)

One-way from

$107
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$518

Good round-trip deal

$294 or less

Good one-way deal

$156 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Las Vegas Harry Reid Intl flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Las Vegas Harry Reid Intl flights.
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From Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl
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One-way flight from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl
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Highest demand for flights based on searches. 2% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Las Vegas Harry Reid Intl.
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Find 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 March 25, 2025.

This Frontier deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/78:01 amIAD - LAS
Nonstop5h 15mFrontier
Sat 5/1711:00 pmLAS - IAD
Nonstop4h 31mFrontier
Deal found 3/25$178
This Travelocity deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/28:01 amIAD - LAS
Nonstop5h 15mMultiple Airlines
Tue 5/66:38 amLAS - IAD
1 stop7h 44mMultiple Airlines
Deal found 3/24$192
This United Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/63:55 pmIAD - LAS
Nonstop5h 17mUnited Airlines
Tue 5/138:25 amLAS - IAD
Nonstop4h 33mUnited Airlines
Deal found 3/24$217
This flugladen.de deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2910:00 amIAD - LAS
1 stop9h 40mHawaiian Airlines
Fri 5/27:08 amLAS - IAD
1 stop7h 51mHawaiian Airlines
Deal found 3/24$226
This Trip.com deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/37:00 amIAD - LAS
1 stop10h 59mAlaska Airlines
Sat 5/106:00 amLAS - IAD
1 stop7h 00mAlaska Airlines
Deal found 3/24$229
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/62:50 pmIAD - LAS
1 stop8h 20mSouthwest
Tue 5/138:30 amLAS - IAD
1 stop6h 25mSouthwest
Deal found 3/24$241
This Cheapflightsfares deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2111:37 amIAD - LAS
1 stop9h 11mSun Country Air
Thu 4/246:43 pmLAS - IAD
1 stop14h 40mSun Country Air
Deal found 3/24$280
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/267:30 amIAD - LAS
1 stop7h 29mDelta
Fri 5/301:10 pmLAS - IAD
1 stop7h 18mDelta
Deal found 3/24$293

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Las Vegas that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 25, 2025.
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

Dulles Intl

Fly to

Las Vegas

Route

Depart

Return

Price

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 5/7

8:01 am-10:16 am

Nonstop5h 15m

Las Vegas Harry Reid Intl

Sat 5/17

11:00 pm-6:31 am

Nonstop4h 31m

$178

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Fri 5/2

8:01 am-10:16 am

Nonstop5h 15m

Las Vegas Harry Reid Intl

Tue 5/6

6:38 am-5:22 pm

1 stop7h 44m

$192

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 5/6

3:55 pm-6:12 pm

Nonstop5h 17m

Las Vegas Harry Reid Intl

Tue 5/13

8:25 am-3:58 pm

Nonstop4h 33m

$217

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 4/29

10:00 am-4:40 pm

1 stop9h 40m

Las Vegas Harry Reid Intl

Fri 5/2

7:08 am-5:59 pm

1 stop7h 51m

$226

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 5/3

7:00 am-2:59 pm

1 stop10h 59m

Las Vegas Harry Reid Intl

Sat 5/10

6:00 am-4:00 pm

1 stop7h 00m

$229

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 5/6

2:50 pm-8:10 pm

1 stop8h 20m

Las Vegas Harry Reid Intl

Tue 5/13

8:30 am-5:55 pm

1 stop6h 25m

$241

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 4/21

11:37 am-5:48 pm

1 stop9h 11m

Las Vegas Harry Reid Intl

Thu 4/24

6:43 pm-12:23 pm

1 stop14h 40m

$280

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 5/26

3:37 pm-10:44 pm

1 stop10h 07m

Las Vegas Harry Reid Intl

Sat 5/31

6:00 am-5:37 pm

1 stop8h 37m

$293

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 6/21

7:30 am-9:30 am

Nonstop5h 00m

$107

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 5/10

3:55 pm-6:12 pm

Nonstop5h 17m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 18 results
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Compare providers for flights from Dulles Intl to Las Vegas

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Las Vegas in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Las Vegas flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for 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

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Las Vegas. Price data was last updated on March 21, 2025.

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 70 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $198). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $269). 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?

Find hourly flight availability from Dulles Intl to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

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 evening tend to be the most expensive. A flight at noon could potentially save you up to 14% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Las Vegas. Price data was last updated on March 16, 2025.

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

Explore weekly flight availability from Dulles Intl to Las Vegas. 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 March 25, 2025.

The most flights from IAD to LAS are scheduled on a Thursday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Rainfall in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average rainfall totals by month.

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.

Temperature in Las Vegas by month

Plan your trip to Las Vegas by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Las Vegas

Get insights into the airlines that provide service to Las Vegas. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Las Vegas. Reviews last updated March 25, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Washington, D.C. to Las Vegas have to say. 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
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,785 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,890 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,330 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,605 reviews
Alaska Airlines
8.0
Very good
9,785 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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?

    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. 8 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.

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

    Flying on Frontier is currently your cheapest option to Las Vegas, with prices starting at $178. Additional round-trip tickets that might be worth considering are offered by United Airlines and Hawaiian Airlines, with the lowest prices starting at $217 and $226, respectively. These flights start at 62% 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 $107. However, be on the lookout for offers from United Airlines and Hawaiian Airlines, 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 United Airlines (81%), Ethiopian Air (72%) and Brussels Airlines (63%).

  • 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 $99. While the most popular route (Washington, D.C. Dulles Intl - Las Vegas Harry Reid Intl) can be booked for $217 on average our data indicates $924 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $198). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $269). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Henderson
Paradise
North Las Vegas
Sunrise Manor
Winchester
Kingman
Primm
Mesquite
Needles
Mount Charleston
Pahrump
Boulder City

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Top 8 airlines flying from Dulles Intl to Las Vegas

Discover the top 8 airlines that operate flights from Dulles Intl to Las Vegas. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$131Average$251FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$132Average$323FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$161Average$313FlexibilityNo cancel feeOn-time65%
DeltaCheapest$258Average$348FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$265Average$347FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$298Average$514FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$332Average$536FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$349Average$495FlexibilityNo cancel feeOn-time71%
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