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Cheap flights from Washington, D.C. Dulles Intl Airport to Las Vegas from $185

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
22 Jan — 29 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 23 December 2025.

Wed 31/1209:00IAD - LAS
Nonstop5h 27mUnited Airlines
Wed 31/1200:59LAS - IAD
1 stop7h 29mUnited Airlines
Deal found 21/12$580
Wed 31/1208:20IAD - LAS
1 stop9h 30mUnited Airlines
Wed 31/1223:53LAS - IAD
Nonstop4h 22mUnited Airlines
Deal found 21/12$670
Wed 31/1217:06IAD - LAS
1 stop9h 53mDelta
Wed 7/109:35LAS - IAD
1 stop11h 22mDelta
Deal found 22/12$739
Wed 31/1208:20IAD - LAS
1 stop9h 30mUnited Airlines
Mon 5/123:53LAS - IAD
Nonstop4h 22mUnited Airlines
Deal found 21/12$754
Wed 31/1217:06IAD - LAS
1 stop9h 53mDelta
Mon 5/111:35LAS - IAD
1 stop8h 31mDelta
Deal found 22/12$769
Sun 28/1212:58IAD - LAS
1 stop8h 33mDelta
Mon 2/211:00LAS - IAD
1 stop9h 10mDelta
Deal found 21/12$807

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 23 December 2025.

Round-trip from

$352

One-way from

$185

Popular in

December

Cheapest in

August

Average price

$798
Frontier
  • Frontier
  • 5/2-12/2
  • 2 total stops
  • 16h 16m total
  • Washington, D.C. to Las Vegas
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 21/1
  • 1 total stop
  • 8h 05m total
  • Washington, D.C. to Las Vegas
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($152 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 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 23 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

Wed 11/2

07:30-15:00

1 stop10h 30m

Las Vegas Harry Reid Intl

Sat 14/2

11:06-23:34

1 stop9h 28m

$369

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 17/2

07:30-15:02

1 stop10h 32m

Las Vegas Harry Reid Intl

Sat 21/2

11:06-23:34

1 stop9h 28m

$369

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 24/1

06:00-15:00

2 stops12h 00m

Las Vegas Harry Reid Intl

Wed 28/1

11:00-23:10

1 stop9h 10m

$376

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 17/3

07:00-14:48

1 stop10h 48m

Las Vegas Harry Reid Intl

Thu 19/3

11:00-23:49

1 stop9h 49m

$429

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 17/1

18:04-09:36

1 stop18h 32m

Las Vegas Harry Reid Intl

Tue 20/1

18:14-17:04

1 stop19h 50m

$431

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 3/2

17:26-22:31

1 stop8h 05m

Las Vegas Harry Reid Intl

Fri 6/2

18:14-16:26

2 stops19h 12m

$438

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 13/1

08:30-10:57

Nonstop5h 27m

Las Vegas Harry Reid Intl

Wed 14/1

23:50-07:13

Nonstop4h 23m

$462

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 14/1

17:26-22:31

1 stop8h 05m

Las Vegas Harry Reid Intl

Sun 18/1

07:00-16:26

1 stop30h 26m

$468

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 7/2

18:04-22:00

1 stop30h 56m

Las Vegas Harry Reid Intl

Mon 9/2

20:13-17:04

2 stops17h 51m

$495

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 20/1

18:04-19:13

1 stop28h 09m

Las Vegas Harry Reid Intl

Sat 24/1

07:05-17:04

2 stops30h 59m

$495

Flights are sorted by cheapest return flights first.

Deals found on 21/12

Showing 1-10 of 24 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 19 December 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 $179). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $464). 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 23 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 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 Delta and Alaska Airlines fly from Washington, D.C. Dulles Intl Airport to Las Vegas in about 10h 30m. The time it takes to get you to your destination can typically vary by up to 8h 02m. 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%), Ethiopian Air(90%) or United Airlines(86%), 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 $179). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $464). 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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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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