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Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $158

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
6 May — 13 May1
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 1 May 2025.

Round-trip from

$317

One-way from

$158

Popular in

December

Cheapest in

May

Average price

$602
Frontier
  • Frontier
  • 14/6-21/6
  • Nonstop
  • 9h 28m total
  • Washington, D.C. to Las Vegas
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Frontier
  • Frontier
  • 13/5
  • Nonstop
  • 5h 15m total
  • Washington, D.C. to Las Vegas
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($60 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 1 May 2025.

Sat 14/607:30IAD - LAS
Nonstop5h 00mFrontier
Sat 21/623:02LAS - IAD
Nonstop4h 28mFrontier
Deal found 30/4$317
Sat 30/812:35IAD - LAS
Nonstop5h 00mUnited Airlines
Sun 7/908:30LAS - IAD
Nonstop4h 39mUnited Airlines
Deal found 30/4$336
Thu 15/507:31IAD - LAS
Nonstop5h 15mMultiple Airlines
Sat 17/507:10LAS - IAD
1 stop8h 15mMultiple Airlines
Deal found 29/4$352
Sat 31/519:25IAD - LAS
1 stop19h 25mAlaska Airlines
Tue 3/607:10LAS - IAD
1 stop8h 15mAlaska Airlines
Deal found 30/4$359
Sun 25/517:14IAD - LAS
1 stop8h 16mHawaiian Airlines
Fri 30/506:00LAS - IAD
1 stop7h 14mHawaiian Airlines
Deal found 1/5$383
Mon 16/612:40IAD - LAS
1 stop13h 02mSun Country Air
Wed 18/618:18LAS - IAD
1 stop14h 31mSun Country Air
Deal found 30/4$399
Wed 21/506:00IAD - LAS
1 stop6h 50mDelta
Tue 27/500:54LAS - IAD
1 stop7h 22mDelta
Deal found 30/4$402
Sat 12/719:00IAD - LAS
1 stop6h 40mSouthwest
Tue 15/710:05LAS - IAD
2 stops9h 40mSouthwest
Deal found 30/4$514

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 1 May 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 14/6

07:30-09:30

Nonstop5h 00m

Las Vegas Harry Reid Intl

Sat 21/6

23:02-06:30

Nonstop4h 28m

$317

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 30/8

12:35-14:35

Nonstop5h 00m

Las Vegas Harry Reid Intl

Sun 7/9

08:30-16:09

Nonstop4h 39m

$336

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 15/5

07:31-09:46

Nonstop5h 15m

Las Vegas Harry Reid Intl

Sat 17/5

07:10-18:25

1 stop8h 15m

$352

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 31/5

19:25-11:50

1 stop19h 25m

Las Vegas Harry Reid Intl

Tue 3/6

07:10-18:25

1 stop8h 15m

$359

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 25/5

17:14-22:30

1 stop8h 16m

Las Vegas Harry Reid Intl

Fri 30/5

06:00-16:14

1 stop7h 14m

$383

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 16/6

12:40-22:42

1 stop13h 02m

Las Vegas Harry Reid Intl

Wed 18/6

18:18-11:49

1 stop14h 31m

$399

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 21/5

06:00-09:50

1 stop6h 50m

Las Vegas Harry Reid Intl

Tue 27/5

00:54-11:16

1 stop7h 22m

$402

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 12/7

19:00-22:40

1 stop6h 40m

Las Vegas Harry Reid Intl

Tue 15/7

10:05-22:45

2 stops9h 40m

$514

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Fri 4/7

17:55-19:59

Nonstop5h 04m

$169

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 25/5

17:14-22:30

1 stop8h 16m

$183

Flights are sorted by cheapest return flights first.

Deals found on 30/4

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 25 April 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 1 May 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 1 May 2025.
To help decide which airline to fly from Washington, D.C. to Las Vegas, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
9,972 reviews
Check prices

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
9,972 reviews
Alaska Airlines
8.0
Very Good
9,972 reviews
Check prices

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very Good
4,294 reviews
Alaska Airlines
8.0
Very Good
9,972 reviews
Check prices

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very Good
7,934 reviews
Alaska Airlines
8.0
Very Good
9,972 reviews
Check prices

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,409 reviews
Alaska Airlines
8.0
Very Good
9,972 reviews
Check prices

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Qatar Airways
7.4
Good
3,563 reviews
Alaska Airlines
8.0
Very Good
9,972 reviews
Check prices

Boarding

8.1

Overall

8.0

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 3 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, Frontier ($317), United Airlines ($336), and Alaska Airlines ($359) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Las Vegas. Frontier is priced at 56% 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 Frontier. According to our data, you can fly for as low as $158. Users have also found prices from $169 and $184 on United 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 Ethiopian Air(90%), United Airlines(68%) or Austrian 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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