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Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $139

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
12 Oct — 19 Oct1
1 adult
1 adult, Economy

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 12 September 2025.

Round-trip from

$246

One-way from

$139

Popular in

December

Cheapest in

July

Average price

$600
United Airlines
  • United Airlines
  • 21/2-28/2
  • Nonstop
  • 9h 20m total
  • Washington, D.C. to Las Vegas
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Southwest
  • Southwest
  • 1/11
  • 1 total stop
  • 8h 55m total
  • Washington, D.C. to Las Vegas
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Highest demand for flights based on searches. 16% potential increase in price ($174 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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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 12 September 2025.

Sat 4/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Tue 7/1022:45LAS - IAD
Nonstop4h 35mUnited Airlines
Deal found 10/9$246
Wed 1/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Sat 4/1019:05LAS - IAD
1 stop8h 34mUnited Airlines
Deal found 10/9$255
Mon 27/1019:41IAD - LAS
Nonstop5h 19mUnited Airlines
Tue 28/1023:50LAS - IAD
Nonstop4h 19mUnited Airlines
Deal found 11/9$270
Sat 25/1017:00IAD - LAS
1 stop9h 25mSouthwest
Tue 28/1006:30LAS - IAD
1 stop6h 30mSouthwest
Deal found 10/9$276
Tue 4/1119:41IAD - LAS
Nonstop5h 19mUnited Airlines
Fri 7/1119:04LAS - IAD
1 stop8h 44mUnited Airlines
Deal found 11/9$279
Sat 11/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Sat 18/1019:05LAS - IAD
1 stop8h 34mUnited Airlines
Deal found 11/9$288
Mon 20/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Thu 23/1023:20LAS - IAD
Nonstop4h 35mUnited Airlines
Deal found 11/9$294
Sat 1/1117:00IAD - LAS
1 stop8h 55mSouthwest
Fri 7/1106:45LAS - IAD
1 stop7h 25mSouthwest
Deal found 11/9$300
Mon 20/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Tue 21/1023:20LAS - IAD
Nonstop4h 35mUnited Airlines
Deal found 10/9$303
Tue 11/1119:41IAD - LAS
Nonstop5h 19mUnited Airlines
Sat 15/1108:45LAS - IAD
Nonstop4h 28mUnited Airlines
Deal found 9/9$312
Fri 3/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Mon 6/1023:20LAS - IAD
Nonstop4h 35mUnited Airlines
Deal found 11/9$318
Sat 1/1117:40IAD - LAS
1 stop7h 46mAlaska Airlines
Tue 4/1107:25LAS - IAD
1 stop6h 48mAlaska Airlines
Deal found 12/9$323

Cheapflights Fare Finder

 
Customise 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 647,157 searches. Data last updated 12 September 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 11/10

19:59-21:59

Nonstop5h 00m

Las Vegas Harry Reid Intl

Sat 18/10

23:20-06:55

Nonstop4h 35m

$279

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 19/2

08:45-11:18

Nonstop5h 33m

Las Vegas Harry Reid Intl

Sun 22/2

23:47-07:14

Nonstop4h 27m

$294

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 12/11

17:40-22:26

1 stop7h 46m

Las Vegas Harry Reid Intl

Mon 17/11

17:40-17:13

1 stop20h 33m

$341

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 18/10

12:50-17:52

1 stop8h 02m

Las Vegas Harry Reid Intl

Tue 21/10

23:20-06:55

Nonstop4h 35m

$351

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 15/11

12:36-18:23

1 stop8h 47m

Las Vegas Harry Reid Intl

Mon 17/11

00:43-11:34

1 stop7h 51m

$388

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 3/11

17:40-23:33

1 stop8h 53m

Las Vegas Harry Reid Intl

Thu 6/11

06:00-17:13

1 stop8h 13m

$391

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 21/10

19:59-21:59

Nonstop5h 00m

Las Vegas Harry Reid Intl

Tue 28/10

23:50-07:09

Nonstop4h 19m

$397

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 17/12

08:21-10:34

Nonstop5h 13m

Las Vegas Harry Reid Intl

Wed 24/12

08:30-16:00

Nonstop4h 30m

$397

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Fri 3/10

19:59-21:59

Nonstop5h 00m

Las Vegas Harry Reid Intl

Wed 8/10

12:10-22:06

1 stop6h 56m

$398

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 15/10

19:59-21:59

Nonstop5h 00m

Las Vegas Harry Reid Intl

Wed 22/10

19:05-06:39

1 stop8h 34m

$406

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 24 results
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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 return 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 return flight from Dulles Intl to Las Vegas. Price data was last updated on 29 August 2025.

Booking 20 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas. 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 Washington, D.C. Dulles Intl Airport to Las Vegas?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $978). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in December is currently the most expensive (average of $1,513). 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 12 September 2025.

When flying from Washington, D.C. Dulles Intl Airport to Las Vegas, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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?

    For a flight from Washington, D.C. Dulles Intl to Las Vegas, you will be flying into Harry Reid Intl. Las Vegas Harry Reid Intl (LAS) is just 10.0 km from the centre vof the city. Harry Reid Intl is the only Las Vegas airport and it handles 4 inbound flights from Washington, D.C. Dulles Intl per day. 0 airlines have flights to Las Vegas Harry Reid Intl from Washington, D.C. Dulles Intl on a regular basis.

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

    Airlines like United Airlines, Alaska Airlines, and Delta fly from Washington, D.C. Dulles Intl Airport to Las Vegas in about 5h. The time it takes to get you to your destination can typically vary by up to 3h 47m. There are 3314 km between Washington, D.C. Dulles Intl Airport and Las Vegas. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Las Vegas consider choosing United Airlines(76%), Frontier(71%) or Ethiopian Air(71%), as they are the most reliable in getting you off to your destination on time.

  • 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 holiday 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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $978). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in December is currently the most expensive (average of $1,513). 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

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