£144 Cheap Flights from Washington (IAD) to Las Vegas (LAS)

View £144 flight on Wed, 2 Sept 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £144 for one-way flights and £278 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
IAD
Washington
LAS
Las Vegas
£278 Return, found 18 hours ago
£278
Return
found 18 hours ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Washington to Las Vegas, returning Wed, 23 Sept, priced at £278 found 18 hours ago
Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
IAD
Washington
LAS
Las Vegas
£293 Return, found 18 hours ago
£293
Return
found 18 hours ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Washington to Las Vegas, returning Wed, 23 Sept, priced at £293 found 18 hours ago
Alaska Airlines
Sat, 12 Sept - Thu, 17 Sept
IAD
Washington
LAS
Las Vegas
£298 Return, found 15 hours ago
£298
Return
found 15 hours ago
Select Alaska Airlines flight, departing Sat, 12 Sept from Washington to Las Vegas, returning Thu, 17 Sept, priced at £298 found 15 hours ago
Alaska Airlines
Wed, 23 Sept - Wed, 30 Sept
IAD
Washington
LAS
Las Vegas
£299 Return, found 3 days ago
£299
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 23 Sept from Washington to Las Vegas, returning Wed, 30 Sept, priced at £299 found 3 days ago
Alaska Airlines
Wed, 16 Sept - Wed, 23 Sept
IAD
Washington
LAS
Las Vegas
£310 Return, found 18 hours ago
£310
Return
found 18 hours ago
Select Alaska Airlines flight, departing Wed, 16 Sept from Washington to Las Vegas, returning Wed, 23 Sept, priced at £310 found 18 hours ago
Alaska Airlines
Tue, 14 Jul - Tue, 21 Jul
IAD
Washington
LAS
Las Vegas
£310 Return, found 3 hours ago
£310
Return
found 3 hours ago
Select Alaska Airlines flight, departing Tue, 14 Jul from Washington to Las Vegas, returning Tue, 21 Jul, priced at £310 found 3 hours ago
Alaska Airlines
Tue, 14 Jul - Tue, 21 Jul
IAD
Washington
LAS
Las Vegas
£312 Return, found 3 hours ago
£312
Return
found 3 hours ago
Select Alaska Airlines flight, departing Tue, 14 Jul from Washington to Las Vegas, returning Tue, 21 Jul, priced at £312 found 3 hours ago
Delta
Thu, 11 Jun - Wed, 17 Jun
IAD
Washington
LAS
Las Vegas
£326 Return, found 2 days ago
£326
Return
found 2 days ago
Select Delta flight, departing Thu, 11 Jun from Washington to Las Vegas, returning Wed, 17 Jun, priced at £326 found 2 days ago
American Airlines
Wed, 5 Aug - Thu, 6 Aug
IAD
Washington
LAS
Las Vegas
£342 Return, found 3 days ago
£342
Return
found 3 days ago
Select American Airlines flight, departing Wed, 5 Aug from Washington to Las Vegas, returning Thu, 6 Aug, priced at £342 found 3 days ago
United
Wed, 10 Jun - Wed, 17 Jun
IAD
Washington
LAS
Las Vegas
£444 Return, found 3 hours ago
£444
Return
found 3 hours ago
Select United flight, departing Wed, 10 Jun from Washington to Las Vegas, returning Wed, 17 Jun, priced at £444 found 3 hours ago

Alternative airports near Las Vegas

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

Select flight to McCarran Intl. LAS. Cheapest and Closest option available. Average driving time to city centre is 6 minutes. Flights from £352
LAS
McCarran Intl.
CheapestClosest
Average driving time to city centre6 min
Flights from £352

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

May is typically the cheapest month to fly

From £134 - £246 per traveller.

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) cost?
One-way flights typically cost between $686 and $2,431 and return flights often range between $686 and $2,431. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
September is typically the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.), with average round-trip fares of approximately 793 CAD. This is about 21% lower than the average price throughout the year. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) include May and August.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
Enter IAD to LAS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
The best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) will differ from traveler to traveler. 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
When looking for the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.), you'll find that September and August are typically the cheapest months, with average round-trip flights around 793 CAD. However, the most popular months for travel are June and May. Since there isn't an overlap between the cheapest and most popular times, you have a choice: you can save money by travelling in late summer, or opt for the busier spring/early summer months when there are more flight options, though prices might be higher. This information is based on booking data from the past year.*Prices based on flights available on Expedia in the last year.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
There are approximately 4 nonstop flights per day from Washington Dulles Intl. (IAD) to Harry Reid Intl. (LAS). For even more choice, look at flights that include layovers, as there are around 79 connecting flights per day. Some common connection points include Seattle - Tacoma Intl. (SEA), Denver Intl. (DEN), and Hartsfield-Jackson Atlanta Intl. (ATL).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
The earliest flight from Washington Dulles Intl. (IAD) to Harry Reid International Airport (LAS) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in February and March. An early departure like this can help you maximize your time in Las Vegas. 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
You'll find the most flight options from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) on a Friday, with around 57 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Delta Air Lines, and American Airlines. Flight options are fairly consistent throughout the week, with Fridays having only slightly more flights than other days.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to Las Vegas, NV (LAS-Harry Reid Intl.) are in the early morning, between 6am and 9am. About 31% of passengers prefer this time window. Many major carriers, including United Airlines and Delta Air Lines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive in Las Vegas with plenty of time to spare.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
Direct flights from IAD to LAS usually take about 5 hours 20 minutes, traveling roughly 2,061 miles. If you opt for a connecting flight, expect to add around 3 hours to your journey. 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
Select the "Business class" and "First class" filters when looking for IAD to LAS flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
A non-stop, one-way business class flight from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) is usually around 1,820 CAD - 1,927 CAD. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid 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 Las Vegas from Washington Dulles Intl. (IAD)?
If you're planning to travel to Las Vegas from Washington Dulles Intl. (IAD), you can fly into Harry Reid International Airport (LAS) Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Denver Intl. (DEN), San Diego Intl. (SAN) before reaching Las Vegas. 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid 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 Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Las Vegas, NV (LAS-Harry Reid 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
Washington Dulles Intl.
Destination airport
Harry Reid Intl.
Return price
£278
Distance
3297 km
Average flight time
2 hours 47 mins

Book with confidence

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

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

The easiest way to view the best deals on flights from Washington to Las Vegas 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 Washington Dulles Intl. to Harry Reid Intl. start at just £278 and range up to £444.  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Harry Reid 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 Washington to Las Vegas easily and book with confidence

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