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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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LAS
23 Feb — 2 Mar1
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 24 January 2026.

Tue 24/207:05
IAD
-
LAS
1 stop9h 20m
Alaska Airlines
Tue 3/318:58
LAS
-
IAD
1 stop19h 29m
Alaska Airlines
Deal found 23/1$404
Wed 11/307:00
IAD
-
LAS
1 stop10h 47m
Delta
Wed 25/311:00
LAS
-
IAD
1 stop9h 49m
Delta
Deal found 23/1$415
Sat 21/218:20
IAD
-
LAS
1 stop31h 08m
Alaska Airlines
Tue 24/206:00
LAS
-
IAD
1 stop8h 27m
Alaska Airlines
Deal found 23/1$423
Tue 17/207:05
IAD
-
LAS
1 stop19h 50m
Alaska Airlines
Tue 24/206:00
LAS
-
IAD
1 stop8h 27m
Alaska Airlines
Deal found 22/1$424
Tue 17/207:30
IAD
-
LAS
1 stop17h 30m
Delta
Thu 26/206:00
LAS
-
IAD
1 stop14h 10m
Delta
Deal found 23/1$430
Wed 18/207:30
IAD
-
LAS
1 stop10h 32m
Delta
Sat 28/211:05
LAS
-
IAD
1 stop9h 05m
Delta
Deal found 23/1$444
Tue 24/207:05
IAD
-
LAS
1 stop9h 20m
Alaska Airlines
Thu 26/207:00
LAS
-
IAD
1 stop19h 40m
Alaska Airlines
Deal found 23/1$453
Mon 9/318:27
IAD
-
LAS
2 stops27h 49m
Alaska Airlines
Wed 11/306:00
LAS
-
IAD
1 stop8h 27m
Alaska Airlines
Deal found 22/1$460

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 24 January 2026.

Round-trip from

$404

One-way from

$185

Popular in

March

Cheapest in

August

Average price

$669
Alaska Airlines
  • Alaska Airlines
  • 24/2-28/2
  • 2 total stops
  • 17h 47m total
  • Washington, D.C. to Las Vegas
Search Deals
Frontier
  • Frontier
  • 12/4
  • 1 total stop
  • 8h 36m total
  • Washington, D.C. to Las Vegas
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($136 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 24 January 2026.
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

Mon 6/4

18:22-09:53

1 stop18h 31m

Las Vegas Harry Reid Intl

Wed 15/4

06:29-17:22

1 stop7h 53m

$479

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 16/2

07:05-23:55

1 stop19h 50m

Las Vegas Harry Reid Intl

Tue 24/2

06:00-17:27

1 stop8h 27m

$495

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 3/3

07:05-22:28

2 stops18h 23m

Las Vegas Harry Reid Intl

Fri 6/3

06:00-05:40

1 stop20h 40m

$507

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 4/3

07:05-22:28

2 stops18h 23m

Las Vegas Harry Reid Intl

Sat 7/3

06:00-17:27

1 stop8h 27m

$517

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 9/3

18:20-10:07

2 stops18h 47m

Las Vegas Harry Reid Intl

Thu 12/3

06:33-17:27

1 stop7h 54m

$564

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Tue 5/5

09:00-16:04

1 stop10h 04m

Las Vegas Harry Reid Intl

Thu 7/5

06:00-05:50

1 stop20h 50m

$568

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 14/2

16:30-22:20

1 stop8h 50m

Las Vegas Harry Reid Intl

Tue 17/2

07:50-17:00

1 stop6h 10m

$570

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sat 14/2

18:20-17:18

2 stops25h 58m

Las Vegas Harry Reid Intl

Sat 21/2

06:00-17:27

1 stop8h 27m

$581

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 16/2

18:20-16:37

1 stop25h 17m

Las Vegas Harry Reid Intl

Fri 20/2

17:58-17:27

1 stop20h 29m

$586

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 29/4

09:00-11:21

Nonstop5h 21m

Las Vegas Harry Reid Intl

Sat 2/5

23:40-07:17

Nonstop4h 37m

$590

Flights are sorted by cheapest return flights first.

Deals found on 23/1

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 16 January 2026.

Booking 27 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 $173). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $431). 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 24 January 2026.

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.

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

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.

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

    Airlines like Alaska Airlines and Southwest fly from Washington, D.C. Dulles Intl Airport to Las Vegas in about 8h 50m. The time it takes to get you to your destination can typically vary by up to 16h 27m. 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 Brussels Airlines(100%), Ethiopian Air(92%) or United Airlines(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 $173). Flying from Washington, D.C. Dulles Intl Airport to Las Vegas in March is currently the most expensive (average of $431). 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.

Can Cheapflights notify me if prices for flights from Dulles Intl to Las Vegas become cheaper?

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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