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Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $173

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
30 Mar — 6 Apr1
1 adult

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 25 March 2025.

Round-trip from

$345

One-way from

$173

Popular in

December

Cheapest in

February

Average price

$824
United Airlines
  • United Airlines
  • 6/5-13/5
  • Nonstop
  • 9h 50m total
  • Washington, D.C. to Las Vegas
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United Airlines
  • United Airlines
  • 7/5
  • Nonstop
  • 5h 19m total
  • Washington, D.C. to Las Vegas
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 25 March 2025.

Tue 6/515:55IAD - LAS
Nonstop5h 17mUnited Airlines
Tue 13/508:25LAS - IAD
Nonstop4h 33mUnited Airlines
Deal found 24/3$345
Wed 7/508:01IAD - LAS
Nonstop5h 15mFrontier
Wed 14/523:00LAS - IAD
Nonstop4h 31mFrontier
Deal found 24/3$347
Wed 7/507:00IAD - LAS
1 stop10h 59mMultiple Airlines
Wed 14/523:00LAS - IAD
Nonstop4h 31mMultiple Airlines
Deal found 24/3$360
Wed 7/507:00IAD - LAS
1 stop10h 59mAlaska Airlines
Sat 10/506:00LAS - IAD
1 stop7h 00mAlaska Airlines
Deal found 24/3$375
Mon 5/517:00IAD - LAS
1 stop8h 24mHawaiian Airlines
Fri 9/519:14LAS - IAD
1 stop9h 29mHawaiian Airlines
Deal found 25/3$382
Sun 4/519:00IAD - LAS
1 stop7h 25mSouthwest
Fri 9/505:50LAS - IAD
1 stop9h 05mSouthwest
Deal found 25/3$383
Tue 15/407:25IAD - LAS
1 stop9h 45mDelta
Tue 22/423:30LAS - IAD
1 stop6h 37mDelta
Deal found 25/3$476
Sun 13/411:51IAD - LAS
1 stop13h 52mSun Country Air
Thu 17/418:35LAS - IAD
1 stop13h 48mSun Country Air
Deal found 24/3$597

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 25 March 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

Tue 6/5

15:55-18:12

Nonstop5h 17m

Las Vegas Harry Reid Intl

Tue 13/5

08:25-15:58

Nonstop4h 33m

$345

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 7/5

08:01-10:16

Nonstop5h 15m

Las Vegas Harry Reid Intl

Wed 14/5

23:00-06:31

Nonstop4h 31m

$347

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 7/5

07:00-14:59

1 stop10h 59m

Las Vegas Harry Reid Intl

Wed 14/5

23:00-06:31

Nonstop4h 31m

$360

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 7/5

07:00-14:59

1 stop10h 59m

Las Vegas Harry Reid Intl

Sat 10/5

06:00-16:00

1 stop7h 00m

$375

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 5/5

17:00-22:24

1 stop8h 24m

Las Vegas Harry Reid Intl

Fri 9/5

17:34-07:43

1 stop11h 09m

$382

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 4/5

19:00-23:25

1 stop7h 25m

Las Vegas Harry Reid Intl

Fri 9/5

05:50-17:55

1 stop9h 05m

$383

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 15/4

07:25-14:10

1 stop9h 45m

Las Vegas Harry Reid Intl

Tue 22/4

23:30-09:07

1 stop6h 37m

$476

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 13/4

11:51-22:43

1 stop13h 52m

Las Vegas Harry Reid Intl

Thu 17/4

18:35-11:23

1 stop13h 48m

$597

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 7/5

15:55-18:12

Nonstop5h 17m

$173

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 3/5

17:00-22:24

1 stop8h 24m

$188

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 15 results
1
2

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 21 March 2025.

Booking 70 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 $1,549). 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 25 March 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.

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 3.0 - 20.0 inches per month. February is typically the wettest month, when rainfall can reach 20.0 mm. May is typically the driest time to visit Las Vegas when rainfall is around 3.0 mm.

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 34.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 9.0 C).

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 25 March 2025.
To help decide which airline to fly from Washington, D.C. to Las Vegas, see what other customers have to say about Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very Good
4,274 reviews
Check prices

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very Good
4,274 reviews
Southwest
8.1
Very Good
4,274 reviews
Check prices

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very Good
9,789 reviews
Southwest
8.1
Very Good
4,274 reviews
Check prices

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very Good
7,890 reviews
Southwest
8.1
Very Good
4,274 reviews
Check prices

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,330 reviews
Southwest
8.1
Very Good
4,274 reviews
Check prices

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,605 reviews
Southwest
8.1
Very Good
4,274 reviews
Check prices

Overall

8.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.1

Food

7.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

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

    According to our current data, United Airlines ($345), Frontier ($347), and Alaska Airlines ($375) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Las Vegas. United Airlines is priced at 54% lower than the current average price of a flight leaving 3 months from now.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $173. Users have also found prices from $188 and $192 on Alaska Airlines and Southwest, respectively.

  • 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(81%), Ethiopian Air(72%) or Brussels Airlines(63%), 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 $1,549). 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

Travelling 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
Paradise
Winchester

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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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