$80 Cheap Flights from Las Vegas (LAS) to Washington (IAD)

View $80 flight on Thu, Aug 14, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $80 for one-way flights and $145 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Oct 11 - Sun, Oct 12
LAS
Las Vegas
IAD
Washington
$145 Roundtrip, found 3 days ago
$145
Roundtrip
found 3 days ago
Select United flight, departing Sat, Oct 11 from Las Vegas to Washington, returning Sun, Oct 12, priced at $145 found 3 days ago
United
Sat, Aug 30 - Sun, Aug 31
LAS
Las Vegas
IAD
Washington
$154 Roundtrip, found 6 hours ago
$154
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Aug 30 from Las Vegas to Washington, returning Sun, Aug 31, priced at $154 found 6 hours ago
Frontier Airlines
Mon, Aug 4 - Sun, Aug 10
LAS
Las Vegas
IAD
Washington
$154 Roundtrip, found 1 day ago
$154
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Aug 4 from Las Vegas to Washington, returning Sun, Aug 10, priced at $154 found 1 day ago
United
Thu, Sep 18 - Sat, Sep 20
LAS
Las Vegas
IAD
Washington
$157 Roundtrip, found 5 days ago
$157
Roundtrip
found 5 days ago
Select United flight, departing Thu, Sep 18 from Las Vegas to Washington, returning Sat, Sep 20, priced at $157 found 5 days ago
United
Wed, Aug 20 - Sat, Aug 23
LAS
Las Vegas
IAD
Washington
$159 Roundtrip, just found
$159
Roundtrip
just found
Select United flight, departing Wed, Aug 20 from Las Vegas to Washington, returning Sat, Aug 23, priced at $159 just found
United
Tue, Aug 5 - Sun, Aug 10
LAS
Las Vegas
IAD
Washington
$160 Roundtrip, found 5 days ago
$160
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 5 from Las Vegas to Washington, returning Sun, Aug 10, priced at $160 found 5 days ago
Frontier Airlines
Tue, Jul 29 - Tue, Aug 5
LAS
Las Vegas
IAD
Washington
$174 Roundtrip, found 2 days ago
$174
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, Jul 29 from Las Vegas to Washington, returning Tue, Aug 5, priced at $174 found 2 days ago
Alaska Airlines
Thu, Aug 7 - Sun, Aug 10
LAS
Las Vegas
IAD
Washington
$191 Roundtrip, just found
$191
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Aug 7 from Las Vegas to Washington, returning Sun, Aug 10, priced at $191 just found
Hawaiian Airlines
Mon, Aug 18 - Sun, Aug 31
LAS
Las Vegas
IAD
Washington
$232 Roundtrip, found 3 days ago
$232
Roundtrip
found 3 days ago
Select Hawaiian Airlines flight, departing Mon, Aug 18 from Las Vegas to Washington, returning Sun, Aug 31, priced at $232 found 3 days ago
American Airlines
Tue, Sep 9 - Tue, Sep 23
LAS
Las Vegas
IAD
Washington
$239 Roundtrip, found 4 days ago
$239
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 9 from Las Vegas to Washington, returning Tue, Sep 23, priced at $239 found 4 days ago

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

May is typically the cheapest month to fly

From $110 - $348 per traveler.

Graph displaying average flight prices per month

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. Closest option available. Average driving time to city center is 8 minutes. Flights from $337
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $337
Flights from Las Vegas (LAS) to Washington (IAD)
Origin airport
Harry Reid Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$144
Distance
2060 mi
Average flight time
8 hours 56 mins

Las Vegas to Washington Flights

The cheapest times to fly from Las Vegas to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Las Vegas to Washington are during the month of October. You can find some of the cheapest flights from Las Vegas to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Las Vegas to Washington

Sunday is one of the best days to book for cheap flights from Las Vegas to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Las Vegas to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Las Vegas to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $80 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Las Vegas to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Las Vegas to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD) cost?
Snag cheap return tickets starting at $133 from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United and Southwest Airlines flight leaving LAS on August 7 2025 and touching down at IAD. The price was last updated on July 13 2025 and has not changed since.
What is the cheapest month to fly from LAS to IAD?
The cheapest flights from LAS to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
When heading out of Harry Reid Intl. Airport (LAS), you can get on a nonstop flight to Washington Dulles Intl. Airport (IAD) with United Airlines.
What is the cheapest airline that flies from LAS to IAD?
With tickets starting at $67 for a one-way flight from LAS to IAD, United is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from LAS on October 8 2025. Prices were last updated on July 13 2025 and have not changed since.
How many flights per day from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
When jetting out of Harry Reid Intl. Airport (LAS), you can take your pick from an average of 3 daily direct flights to Washington Dulles Intl. Airport (IAD).
What are the most popular departure times for flights from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
Flights between LAS and IAD are busiest at 1 PM. For a more relaxed experience and possibly cheaper tickets, choose a departure that's outside typical rush times.
What day of the week has the most flights from LAS to IAD?
Tuesday offers the most flights from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD). Consider leaving on this day and you'll have the best chance of finding a departure that fits your itinerary.
What is the earliest flight from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
The first flight of the day leaving Harry Reid Intl. Airport (LAS) is at around 8:40AM UTC-8. Board this plane and you'll land at Washington Dulles Intl. Airport (IAD) at approximately 4:07PM UTC-5. The total time in the air is 4h 27m.
How long does it take to fly from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
The average flight duration from LAS to IAD is 4 hours and 27 minutes, covering a total distance of 2,100 mi.
What airline has the least delays from LAS to IAD?
With 100% of flights typically arriving on schedule, Frontier Airlines has the best on-time performance for nonstop flights from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD). To keep track of your flight status and receive notifications about any changes, head to the Expedia App.
What is the best time to fly from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
To avoid possible delays on the Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD) route, aim to travel before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from Harry Reid Intl. Airport (LAS)?
Catch a direct flight from Harry Reid Intl. Airport (LAS) to Washington and touch down at any one of these airports:

  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)
  • Washington Dulles Intl. Airport (IAD)
  • Ronald Reagan Washington National Airport (DCA)

Is it cheaper to buy a plane ticket from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your plane ticket from LAS to IAD right before your trip is generally more expensive. But if you're flexible with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a LAS to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a LAS to IAD flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place will take the stress out of planning your trip. Just secure your flights and choose from our wide range of hotels, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
You can usually reschedule or cancel your LAS to IAD flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more details on our Customer Service portal.

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