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£121 Cheap Flights from Las Vegas (LAS) to Washington (IAD)

View £121 flight on Thu, 22 Oct 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 £121 for one-way flights and £260 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 24 Oct - Wed, 28 Oct
LAS
Las Vegas
IAD
Washington
£260 Return, found 1 day ago
£260
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 24 Oct from Las Vegas to Washington, returning Wed, 28 Oct, priced at £260 found 1 day ago
Alaska Airlines
Wed, 14 Oct - Wed, 21 Oct
LAS
Las Vegas
IAD
Washington
£264 Return, found 17 hours ago
£264
Return
found 17 hours ago
Select Alaska Airlines flight, departing Wed, 14 Oct from Las Vegas to Washington, returning Wed, 21 Oct, priced at £264 found 17 hours ago
Alaska Airlines
Sat, 24 Oct - Sat, 31 Oct
LAS
Las Vegas
IAD
Washington
£284 Return, found 6 days ago
£284
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 24 Oct from Las Vegas to Washington, returning Sat, 31 Oct, priced at £284 found 6 days ago
Alaska Airlines
Sat, 17 Oct - Sat, 24 Oct
LAS
Las Vegas
IAD
Washington
£287 Return, found 1 day ago
£287
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 17 Oct from Las Vegas to Washington, returning Sat, 24 Oct, priced at £287 found 1 day ago
Alaska Airlines
Sat, 24 Oct - Sat, 31 Oct
LAS
Las Vegas
IAD
Washington
£288 Return, found 6 days ago
£288
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 24 Oct from Las Vegas to Washington, returning Sat, 31 Oct, priced at £288 found 6 days ago
Alaska Airlines
Sat, 24 Oct - Sat, 31 Oct
LAS
Las Vegas
IAD
Washington
£289 Return, found 6 days ago
£289
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 24 Oct from Las Vegas to Washington, returning Sat, 31 Oct, priced at £289 found 6 days ago
Alaska Airlines
Sat, 24 Oct - Sat, 31 Oct
LAS
Las Vegas
IAD
Washington
£293 Return, found 6 days ago
£293
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 24 Oct from Las Vegas to Washington, returning Sat, 31 Oct, priced at £293 found 6 days ago
Alaska Airlines
Wed, 14 Oct - Wed, 21 Oct
LAS
Las Vegas
IAD
Washington
£302 Return, found 17 hours ago
£302
Return
found 17 hours ago
Select Alaska Airlines flight, departing Wed, 14 Oct from Las Vegas to Washington, returning Wed, 21 Oct, priced at £302 found 17 hours ago
Alaska Airlines
Wed, 14 Oct - Wed, 21 Oct
LAS
Las Vegas
IAD
Washington
£302 Return, found 17 hours ago
£302
Return
found 17 hours ago
Select Alaska Airlines flight, departing Wed, 14 Oct from Las Vegas to Washington, returning Wed, 21 Oct, priced at £302 found 17 hours ago
Alaska Airlines
Sat, 24 Oct - Wed, 28 Oct
LAS
Las Vegas
IAD
Washington
£305 Return, found 1 day ago
£305
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 24 Oct from Las Vegas to Washington, returning Wed, 28 Oct, priced at £305 found 1 day ago

Find the cheapest month to fly from Las Vegas (LAS) to Washington (IAD)

August is typically the cheapest month to fly

From £74 - £347 per traveller.

Frequently asked questions

How much does a flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find cheap one-way flights from £121 and cheap return flights from £260 LAS to IAD with Expedia. Return flights often range between £370 and £1488. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when LAS to IAD ticket fares go up or down.
What is the cheapest month to fly from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest months to fly from LAS to IAD are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are 2 airlines offering direct flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.). Here are the carriers:
  • United operates 23 direct flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
  • Frontier Airlines operates 7 direct flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
What is the cheapest airline that flies from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Frontier Airlines is one of the cheapest airlines offering nonstop return flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.), with tickets starting from around £178 for flights that can be booked for departure within the next year. Sun Country Airlines offers one of the cheapest connecting return flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) starting from around £283. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Las Vegas, NV (LAS) to Washington, DC (IAD)?
To find a cheap flight from Las Vegas, NV (LAS) to Washington, DC (IAD), 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 traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. United offers the most daily flights from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is great 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.
What is the earliest flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs around 12:05 AM local time. This flight is operated by Delta. This is a seasonal service, active in August. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
A direct flight from Las Vegas, NV (LAS-Harry Reid Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically takes around 4 hours 30 minutes, covering a distance of about 3,317 kilometers. If you opt for a flight with one stop, your journey will be longer, usually taking around 7 hours 30 minutes. Flights with two or more stops generally take about 10 hours 30 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Las Vegas, NV (LAS) to Washington, DC (IAD)?
Select the "Business class" and "First class" filters when looking for Las Vegas, NV (LAS) to Washington, DC (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, DC (IAD) from Las Vegas, NV (LAS)?
If you're planning to travel to Washington from Harry Reid International Airport (LAS), you can fly directly into Washington Dulles International Airport (IAD). Some flights may connect through major hubs like Portland International (PDX), San Diego International (SAN), or Los Angeles International (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) to Washington, DC (IAD)?
If you booked your Las Vegas, NV (LAS) to Washington, DC (IAD) 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
Return price
£260
Distance
3297 km
Average flight time
8 hours 35 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 £260 and range up to £305.  

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 October, 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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*Available to Expedia members.