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$80+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
Jul 21 — Jul 281
Mon 7/21
Mon 7/28
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 July or June, booked 53 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 July 16, 2025.

Round-trip from

$156
(Cheapflightsfares)

One-way from

$80
(United Airlines)

Popular in

December

Cheapest in

July

Average price

$259

Good round-trip deal

$196 or less

Good one-way deal

$126 or less
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. 14% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 16, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/13. 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.
Sat 7/267:30 amIAD - LAS
Nonstop4h 59mFrontier
Sat 8/211:00 pmLAS - IAD
Nonstop4h 34mFrontier
Deal found 7/13$156
This United Airlines deal was found by Cheapflights users on 7/15. 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.
Mon 9/112:35 pmIAD - LAS
Nonstop5h 00mUnited Airlines
Wed 9/108:30 amLAS - IAD
Nonstop4h 39mUnited Airlines
Deal found 7/15$159
This Hawaiian Airlines deal was found by Cheapflights users on 7/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/165:40 pmIAD - LAS
1 stop8h 53mHawaiian Airlines
Wed 11/197:25 amLAS - IAD
1 stop6h 48mHawaiian Airlines
Deal found 7/15$200
This Alaska Airlines deal was found by Cheapflights users on 7/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/15:52 pmIAD - LAS
1 stop8h 34mAlaska Airlines
Thu 9/187:47 pmLAS - IAD
1 stop18h 05mAlaska Airlines
Deal found 7/15$201

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 July 16, 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

Sat 7/26

7:30 am-9:29 am

Nonstop4h 59m

Las Vegas Harry Reid Intl

Sat 8/2

11:00 pm-6:34 am

Nonstop4h 34m

$156

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 9/1

7:59 pm-9:58 pm

Nonstop4h 59m

Las Vegas Harry Reid Intl

Thu 9/4

1:15 pm-8:51 pm

Nonstop4h 36m

$159

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 9/1

5:52 pm-11:26 pm

1 stop8h 34m

Las Vegas Harry Reid Intl

Thu 9/4

5:14 pm-4:52 pm

1 stop20h 38m

$201

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 8/23

7:59 pm-9:58 pm

Nonstop4h 59m

$80

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 7/30

7:30 am-9:29 am

Nonstop4h 59m

$84

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 9/15

5:52 pm-11:26 pm

1 stop8h 34m

$94

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 9/9

5:52 pm-9:37 am

1 stop18h 45m

$106

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 8/2

5:23 pm-9:40 pm

1 stop7h 17m

$129

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 8/21

5:40 pm-9:48 am

2 stops19h 08m

$131

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 10/12

12:46 pm-10:46 pm

1 stop13h 00m

$140

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/15

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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.

Read more about IADby Ramsey Qubein
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.

Read more about LASby Ramsey Qubein
Our travel experts
Ramsey Qubein

Ramsey Qubein

Expert on IAD and LAS

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 July 11, 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 53 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 July 16, 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 afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 20% 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 July 13, 2025.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Las Vegas flight should consider departing on Tuesday mornings when fares are most often at their lowest. Monday 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 July 16, 2025.

The most flights from IAD to LAS are scheduled on a Monday (7 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Las Vegas?

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 July 16, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,580 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,863 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Sun Country Air
6.9
Okay
335 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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 $156. Another option worth looking into is United Airlines, starting at $159 round trip. 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 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 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 Frontier (75%), Ethiopian Air (72%) and Brussels Airlines (62%).

  • 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 $79. While the most popular route (Washington, D.C. Dulles Intl - Las Vegas Harry Reid Intl) can be booked for $141 on average our data indicates $985 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 Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
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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 July 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$199FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$161Average$308FlexibilityNo cancel feeOn-time65%
DeltaCheapest$256Average$342FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$256Average$473FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$256Average$500FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$257Average$315FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$323Average$370FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$368Average$523FlexibilityNo cancel feeOn-time71%

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