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Cheap flights from Washington, D.C. to Las Vegas from $138

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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LAS
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Washington, D.C. to Las Vegas

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 15 September 2025.

Round-trip from

$245

One-way from

$138

Popular in

December

Cheapest in

August

Average price

$508

Good round-trip deal

$250 or less
United Airlines
  • United Airlines
  • 25/10-1/11
  • Nonstop
  • 9h 28m total
  • Washington, D.C. to Las Vegas
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Southwest
  • Southwest
  • 18/2
  • 1 total stop
  • 8h 50m total
  • Washington, D.C. to Las Vegas
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Highest demand for flights based on searches. 10% potential increase in price ($94 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Las Vegas Harry Reid Intl.
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Find flight deals from Washington, D.C. to Las Vegas

Cheapest flights from Washington, D.C. to Las Vegas
Explore the most affordable flight options available from Washington, D.C. to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 September 2025.

Sat 25/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Sat 1/1108:45LAS - IAD
Nonstop4h 28mUnited Airlines
Deal found 12/9$245
Sat 13/1212:35IAD - LAS
Nonstop5h 23mUnited Airlines
Sun 21/1223:53LAS - IAD
Nonstop4h 22mUnited Airlines
Deal found 12/9$269
Fri 14/1119:41IAD - LAS
Nonstop5h 19mUnited Airlines
Tue 18/1108:45LAS - IAD
Nonstop4h 28mUnited Airlines
Deal found 15/9$278
Wed 15/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Fri 17/1018:22LAS - IAD
1 stop9h 17mUnited Airlines
Deal found 15/9$287
Thu 4/1208:21IAD - LAS
Nonstop5h 13mUnited Airlines
Fri 12/1213:50LAS - IAD
Nonstop4h 20mUnited Airlines
Deal found 15/9$295
Sun 16/1105:05IAD - LAS
2 stops10h 55mSouthwest
Tue 18/1106:20LAS - IAD
1 stop7h 45mSouthwest
Deal found 12/9$307
Wed 5/1119:41IAD - LAS
Nonstop5h 19mUnited Airlines
Sat 8/1113:20LAS - IAD
Nonstop4h 30mUnited Airlines
Deal found 15/9$311
Fri 10/1019:59IAD - LAS
Nonstop5h 00mUnited Airlines
Fri 17/1018:22LAS - IAD
1 stop9h 17mUnited Airlines
Deal found 15/9$317
Tue 28/1017:40IAD - LAS
1 stop7h 46mAlaska Airlines
Tue 4/1117:40LAS - IAD
1 stop20h 33mAlaska Airlines
Deal found 13/9$322
Sun 7/1217:37IAD - LAS
1 stop8h 49mAlaska Airlines
Fri 12/1207:25LAS - IAD
1 stop7h 05mAlaska Airlines
Deal found 15/9$325

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. 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 15 September 2025.
Use the filters below to find and compare flights from Washington, D.C. to Las Vegas that are best for you.

Fly from

Washington, D.C.

Fly to

Las Vegas

Route

Depart

Return

Price

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 4/11

09:00-11:25

Nonstop5h 25m

Las Vegas Harry Reid Intl

Fri 7/11

23:50-07:09

Nonstop4h 19m

$358

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 14/1

15:00-20:37

1 stop8h 37m

Las Vegas Harry Reid Intl

Wed 21/1

06:05-16:30

1 stop7h 25m

$386

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 1/2

13:00-20:28

1 stop10h 28m

Las Vegas Harry Reid Intl

Wed 4/2

07:05-19:12

1 stop9h 07m

$386

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Fri 14/11

17:59-22:30

1 stop7h 31m

Las Vegas Harry Reid Intl

Mon 17/11

00:43-11:34

1 stop7h 51m

$386

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 4/12

17:37-23:26

1 stop8h 49m

Las Vegas Harry Reid Intl

Tue 9/12

07:25-17:30

1 stop7h 05m

$416

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 8/10

06:18-12:45

1 stop9h 27m

Las Vegas Harry Reid Intl

Fri 10/10

23:40-11:57

1 stop9h 17m

$440

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 25/10

19:59-21:59

Nonstop5h 00m

Las Vegas Harry Reid Intl

Wed 29/10

23:50-07:09

Nonstop4h 19m

$461

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 29/10

09:00-11:25

Nonstop5h 25m

Las Vegas Harry Reid Intl

Wed 5/11

23:50-07:09

Nonstop4h 19m

$461

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 20/10

19:59-21:59

Nonstop5h 00m

Las Vegas Harry Reid Intl

Fri 24/10

23:20-06:55

Nonstop4h 35m

$461

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 1/11

19:44-22:03

Nonstop5h 19m

Las Vegas Harry Reid Intl

Tue 4/11

23:50-07:09

Nonstop4h 19m

$461

Flights are sorted by cheapest return flights first.

Deals found on 13/9

Showing 1-10 of 23 results
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Best time to book a flight from Washington, D.C. to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Washington, D.C. 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. to Las Vegas

How far ahead should I book a flight from Washington, D.C. to Las Vegas?

Use this chart to determine the optimal time to book a return flight from Washington, D.C. to Las Vegas. Price data was last updated on 12 September 2025.

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Las Vegas, you should look to book at least 37 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Washington, D.C. to Las Vegas?

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Las Vegas (average of $978). Flying from Washington, D.C. 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 WAS to LAS?

Find hourly flight availability from Washington, D.C. 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 15 September 2025.

When flying from Washington, D.C. 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.

Weekly flight availability from Washington, D.C. to Las Vegas

Explore weekly flight availability from Washington, D.C. 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 15 September 2025.

The most flights from WAS to LAS are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

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

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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.?

    For a flight from Washington, D.C. 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 8 inbound flights from Washington, D.C. per day. 0 airlines have flights to Las Vegas Harry Reid Intl from Washington, D.C. on a regular basis.

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

    Alaska Airlines and Delta can get you from Washington, D.C. to Las Vegas in just under 7h 31m. Your travel time can differ by up to 15m. Washington, D.C. and Las Vegas are separated by a distance of 3314 km. This flight may include one or multiple stops.

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

    The cheapet airlines for a one-way flight from Washington, D.C. to Las Vegas are Southwest ($138), United Airlines ($156), and Hawaiian Airlines ($162).

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. 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 Washington, D.C. to Las Vegas that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Las Vegas flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Las Vegas?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Las Vegas.

  • Can I find deals for business class flights from Washington, D.C. to Las Vegas?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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. to Las Vegas?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to Las Vegas (average of $978). Flying from Washington, D.C. 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

Travelling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
Paradise
Winchester

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Alternative routes for Washington, D.C. to Las Vegas

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Las Vegas flights

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How does Cheapflights help users find flights from Washington, D.C. to Las Vegas?

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Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Las Vegas?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Las Vegas from Washington, D.C..

Can Cheapflights find flights from Washington, D.C. to Las Vegas with no change fees?

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

Can Cheapflights notify me if prices for flights from Washington, D.C. to Las Vegas become cheaper?

Yes! Start tracking prices for Washington, D.C. to Las Vegas flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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