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Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $178

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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
3 Jan — 10 Jan1
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 4 December 2025.

Wed 31/1209:00IAD - LAS
Nonstop5h 27mUnited Airlines
Thu 1/123:53LAS - IAD
Nonstop4h 22mUnited Airlines
Deal found 2/12$360
Wed 31/1220:25IAD - LAS
Nonstop5h 20mUnited Airlines
Tue 6/108:30LAS - IAD
Nonstop4h 30mUnited Airlines
Deal found 1/12$433
Wed 31/1216:40IAD - LAS
1 stop9h 25mSouthwest
Wed 7/107:25LAS - IAD
1 stop6h 25mSouthwest
Deal found 1/12$439
Wed 31/1220:25IAD - LAS
Nonstop5h 20mUnited Airlines
Wed 7/108:30LAS - IAD
Nonstop4h 30mUnited Airlines
Deal found 1/12$492
Wed 31/1217:06IAD - LAS
1 stop9h 53mDelta
Wed 7/110:10LAS - IAD
1 stop7h 27mDelta
Deal found 2/12$498

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 4 December 2025.

Round-trip from

$342

One-way from

$178

Popular in

March

Cheapest in

August

Average price

$765
Alaska Airlines
  • Alaska Airlines
  • 3/2-6/2
  • 2 total stops
  • 16h 09m total
  • Washington, D.C. to Las Vegas
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United Airlines
  • United Airlines
  • 6/1
  • Nonstop
  • 5h 27m total
  • Washington, D.C. to Las Vegas
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($140 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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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 4 December 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

Fri 23/1

08:30-10:57

Nonstop5h 27m

Las Vegas Harry Reid Intl

Tue 27/1

08:30-16:00

Nonstop4h 30m

$346

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 29/1

17:26-23:28

1 stop9h 02m

Las Vegas Harry Reid Intl

Mon 2/2

19:52-17:04

1 stop18h 12m

$355

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 18/1

17:26-23:28

1 stop9h 02m

Las Vegas Harry Reid Intl

Sat 24/1

06:00-17:04

1 stop8h 04m

$358

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 11/2

07:30-15:00

1 stop10h 30m

Las Vegas Harry Reid Intl

Sun 15/2

11:05-23:10

1 stop9h 05m

$372

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 19/2

07:30-15:02

1 stop10h 32m

Las Vegas Harry Reid Intl

Sat 21/2

11:06-23:15

1 stop9h 09m

$372

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 8/2

17:26-23:28

1 stop9h 02m

Las Vegas Harry Reid Intl

Mon 9/2

19:52-17:04

1 stop18h 12m

$372

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Thu 8/1

06:00-14:35

2 stops11h 35m

Las Vegas Harry Reid Intl

Thu 15/1

11:00-23:10

1 stop9h 10m

$379

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Fri 9/1

07:30-14:35

1 stop10h 05m

Las Vegas Harry Reid Intl

Fri 16/1

06:05-16:46

1 stop7h 41m

$381

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Fri 23/1

07:30-15:00

1 stop10h 30m

Las Vegas Harry Reid Intl

Mon 26/1

07:00-19:09

1 stop9h 09m

$381

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 21/1

08:30-10:57

Nonstop5h 27m

Las Vegas Harry Reid Intl

Sat 24/1

23:50-07:13

Nonstop4h 23m

$386

Flights are sorted by cheapest return flights first.

Deals found on 3/12

Showing 1-10 of 23 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 28 November 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, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $181). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $471). 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 4 December 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 6 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 27m. The time it takes to get you to your destination can typically vary by up to 5h 03m. 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 ITA Airways(100%), United Airlines(89%) or Ethiopian Air(88%), 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, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Las Vegas (average of $181). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $471). 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.

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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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