£139 Cheap Flights from Las Vegas (LAS) to Washington (IAD)

View £139 flight on Tue, 18 Aug 2026Opens in a new window

Popular airlines from Harry Reid Intl. Airport (LAS) to Washington Dulles International Airport (IAD)

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Cheap Flights from Las Vegas (LAS) to Washington (IAD)

Prices were available within the past 7 days and start at £139 for one-way flights and £278 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£278 Return, found 4 hours ago
£278
Return
found 4 hours ago
Select American Airlines flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £278 found 4 hours ago
Delta
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£278 Return, found 4 hours ago
£278
Return
found 4 hours ago
Select Delta flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £278 found 4 hours ago
American Airlines
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£301 Return, found 4 hours ago
£301
Return
found 4 hours ago
Select American Airlines flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £301 found 4 hours ago
Alaska Airlines
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£309 Return, found 4 hours ago
£309
Return
found 4 hours ago
Select Alaska Airlines flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £309 found 4 hours ago
United
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£312 Return, found 4 hours ago
£312
Return
found 4 hours ago
Select United flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £312 found 4 hours ago
United
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£316 Return, found 4 hours ago
£316
Return
found 4 hours ago
Select United flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £316 found 4 hours ago
Delta
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£319 Return, found 4 hours ago
£319
Return
found 4 hours ago
Select Delta flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £319 found 4 hours ago
Delta
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£323 Return, found 4 hours ago
£323
Return
found 4 hours ago
Select Delta flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £323 found 4 hours ago
American Airlines
Tue, 18 Aug - Wed, 2 Sept
LAS
Las Vegas
IAD
Washington
£333 Return, found 4 hours ago
£333
Return
found 4 hours ago
Select American Airlines flight, departing Tue, 18 Aug from Las Vegas to Washington, returning Wed, 2 Sept, priced at £333 found 4 hours ago
Delta
Mon, 17 Aug - Tue, 1 Sept
LAS
Las Vegas
IAD
Washington
£338 Return, found 4 hours ago
£338
Return
found 4 hours ago
Select Delta flight, departing Mon, 17 Aug from Las Vegas to Washington, returning Tue, 1 Sept, priced at £338 found 4 hours ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £393
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city centre8 min
Flights from £393

Frequently asked questions

Which airlines fly direct from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter LAS to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, F9 typically offers the lowest fares. UA offers the most daily flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 4 nonstop flights per day from Harry Reid Intl. (LAS) to Washington Dulles Intl. (IAD). For even more choice, look at flights that include layovers, as there are around 96 connecting flights per day. Some common connection points include Los Angeles Intl. (LAX), San Francisco Intl. (SFO), and San Diego Intl. (SAN).
What is the earliest flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Harry Reid International Airport (LAS) to Washington Dulles Intl. (IAD) typically departs at approximately 12:05 AM local time, operated by United Airlines. This is a seasonal service active in June. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
For flights from Harry Reid International Airport (LAS) to Washington Dulles International Airport (IAD), you'll typically find the most options on a Monday, with around 85 flights available. This gives you plenty of flight options to choose from. Major airlines on this route include United Airlines, Alaska Airlines, and Delta Air Lines. Flight schedules are fairly consistent throughout the week, with Monday offering only slightly more flights than other days.
What are the most popular departure times for flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are in the early morning, from 6am to 9am. About 28% of passengers prefer this time. Many major carriers, including United Airlines and Delta Air Lines, offer flights during this window. This timing works well because you can get an early start to your travel day and arrive in Washington, DC with plenty of time for your activities.
How long does it take to fly from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A nonstop flight from LAS to IAD typically takes around 4 hours 30 minutes, covering approximately 2,061 miles. Connecting flights on this route usually add 3 hours to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for LAS to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from McCarran Intl. (LAS)?
When traveling from Harry Reid International Airport (LAS) to Washington, you can fly into Washington Dulles Intl. (IAD) and Ronald Reagan Washington National (DCA). Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), Los Angeles Intl. (LAX) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Harry Reid Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, Delta, United
Return price
£278
Distance
3297 km
Average flight time
9 hours 36 mins

Book with confidence

Compare flights from Las Vegas to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Las Vegas to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Harry Reid Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Harry Reid Intl. (LAS) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Las Vegas to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Harry Reid Intl. to Washington Dulles Intl. start at just £278 and range up to £338.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Las Vegas and Washington
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Las Vegas to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Harry Reid Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Las Vegas to Washington easily and book with confidence

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