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Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $135

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
7 Sep — 14 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Las Vegas

Enter your travel dates to find the best prices.

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 8 August 2026.

Fri 28/818:00 -
Nonstop5h 08m
Mon 31/823:57 -
Nonstop4h 33m
Deal found 7/8$268
Tue 1/908:59 -
Nonstop4h 55m
Sun 13/900:59 -
1 stop7h 34m
Deal found 5/8$271
Tue 25/808:31 -
1 stop7h 44m
Sat 29/823:57 -
Nonstop4h 33m
Deal found 3/8$277
Mon 24/818:00 -
Nonstop5h 08m
Sat 29/823:57 -
Nonstop4h 33m
Deal found 4/8$311
Sat 22/808:31 -
1 stop7h 44m
Wed 26/823:57 -
Nonstop4h 33m
Deal found 3/8$319
Thu 27/817:26 -
1 stop7h 33m
Mon 31/823:57 -
Nonstop4h 33m
Deal found 6/8$325
Sun 30/809:00 -
Nonstop5h 04m
Fri 4/923:57 -
Nonstop4h 33m
Deal found 4/8$333
Fri 21/817:26 -
1 stop7h 33m
Mon 24/823:57 -
Nonstop4h 33m
Deal found 3/8$348
Sun 8/1108:40 -
Nonstop5h 22m
Wed 11/1123:50 -
Nonstop4h 22m
Deal found 6/8$353
Sat 22/808:31 -
1 stop7h 44m
Mon 24/823:57 -
Nonstop4h 33m
Deal found 6/8$362
Fri 28/817:47 -
1 stop8h 23m
Mon 31/813:20 -
1 stop8h 14m
Deal found 7/8$365

Find 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 8 August 2026.

Round-trip from

$268

One-way from

$135

Popular in

October

Cheapest in

August

Average price

$435
United Airlines
  • United Airlines
  • 25/8-1/9
  • Nonstop
  • 9h 42m total
  • Washington, D.C. to Las Vegas
Search Deals
United Airlines
  • United Airlines
  • 31/8
  • Nonstop
  • 5h 08m total
  • Washington, D.C. to Las Vegas
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($112 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 8 August 2026.
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

Cheapest return flight

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Mon 19/10

18:00-20:08

Nonstop5h 08m

Las Vegas Harry Reid Intl

Sat 24/10

23:55-07:28

Nonstop4h 33m

$353
Fastest return journey

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Sun 6/12

17:50-20:07

Nonstop5h 17m

Las Vegas Harry Reid Intl

Sun 13/12

23:00-06:22

Nonstop4h 22m

$353

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Wed 18/11

08:40-11:02

Nonstop5h 22m

Las Vegas Harry Reid Intl

Mon 23/11

23:50-07:12

Nonstop4h 22m

$353

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Sat 29/8

17:47-23:05

1 stop8h 18m

Las Vegas Harry Reid Intl

Tue 1/9

05:50-16:38

1 stop7h 48m

$365

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Tue 25/8

15:03-19:46

1 stop7h 43m

Las Vegas Harry Reid Intl

Thu 27/8

23:45-09:20

1 stop6h 35m

$365

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Fri 28/8

17:47-23:10

1 stop8h 23m

Las Vegas Harry Reid Intl

Mon 31/8

05:50-16:38

1 stop7h 48m

$365

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Wed 4/11

17:40-19:58

Nonstop5h 18m

Las Vegas Harry Reid Intl

Wed 11/11

07:00-17:55

1 stop7h 55m

$367

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Tue 1/9

08:28-12:10

1 stop6h 42m

Las Vegas Harry Reid Intl

Mon 14/9

23:24-10:21

1 stop7h 57m

$373

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Mon 24/8

06:00-12:38

1 stop9h 38m

Las Vegas Harry Reid Intl

Sat 29/8

06:00-16:42

1 stop7h 42m

$373

Washington, D.C.Las Vegas

IAD Washington, D.C. Dulles Intl - LAS Las Vegas Harry Reid Intl

IADLAS

Washington, D.C. Dulles Intl

Wed 26/8

07:00-12:06

1 stop8h 06m

Las Vegas Harry Reid Intl

Fri 4/9

14:48-00:34

1 stop6h 46m

$373

Flights are sorted by cheapest return flights first.

Deals found on 3/8

Showing 1-10 of 21 resultsSorted by cheapest first
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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?

Booking 8 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $435). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in October is currently the most expensive (average of $1,058). 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 8 August 2026.

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.

How much does it cost for a return flight from Washington, D.C. Dulles Intl Airport to Las Vegas?

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Las Vegas flights typically cost between $284 and $647 in August.
The cheapest return price found within the last 5 days was $268 on United Airlines (28 Aug–31 Aug).

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 5 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 and Delta fly from Washington, D.C. Dulles Intl Airport to Las Vegas in about 5h 08m. The time it takes to get you to your destination can typically vary by up to 2h 35m. 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 Ethiopian Air(88%), United Airlines(86%) or Austrian Airlines(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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $435). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in October is currently the most expensive (average of $1,058). 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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Can Cheapflights find flights from Dulles Intl to Las Vegas with no change fees?

Yes, we can. To see specific flights from Dulles Intl to Las Vegas with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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