$70 Cheap Flights from Las Vegas (LAS) to Washington (IAD)

View $70 flight on Wed, Jan 7, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $70 for one-way flights and $130 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Nov 19 - Thu, Nov 20
LAS
Las Vegas
IAD
Washington
$130 Roundtrip, found 2 days ago
$130
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Nov 19 from Las Vegas to Washington, returning Thu, Nov 20, priced at $130 found 2 days ago
Frontier Airlines
Thu, Jan 8 - Sun, Jan 18
LAS
Las Vegas
IAD
Washington
$144 Roundtrip, found 6 hours ago
$144
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Jan 8 from Las Vegas to Washington, returning Sun, Jan 18, priced at $144 found 6 hours ago
Frontier Airlines
Thu, Jan 8 - Sun, Jan 18
LAS
Las Vegas
IAD
Washington
$147 Roundtrip, found 6 hours ago
$147
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Jan 8 from Las Vegas to Washington, returning Sun, Jan 18, priced at $147 found 6 hours ago
Frontier Airlines
Thu, Jan 15 - Sun, Jan 18
LAS
Las Vegas
IAD
Washington
$151 Roundtrip, found 2 hours ago
$151
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Jan 15 from Las Vegas to Washington, returning Sun, Jan 18, priced at $151 found 2 hours ago
Frontier Airlines
Thu, Jan 15 - Sun, Jan 18
LAS
Las Vegas
IAD
Washington
$154 Roundtrip, found 2 hours ago
$154
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Jan 15 from Las Vegas to Washington, returning Sun, Jan 18, priced at $154 found 2 hours ago
Frontier Airlines
Wed, Nov 19 - Thu, Nov 20
LAS
Las Vegas
IAD
Washington
$168 Roundtrip, found 2 days ago
$168
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Nov 19 from Las Vegas to Washington, returning Thu, Nov 20, priced at $168 found 2 days ago
Alaska Airlines
Thu, Jan 8 - Sun, Jan 18
LAS
Las Vegas
IAD
Washington
$217 Roundtrip, found 6 hours ago
$217
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Thu, Jan 8 from Las Vegas to Washington, returning Sun, Jan 18, priced at $217 found 6 hours ago
Delta
Wed, Jan 7 - Sat, Jan 10
LAS
Las Vegas
IAD
Washington
$257 Roundtrip, just found
$257
Roundtrip
just found
Select Delta flight, departing Wed, Jan 7 from Las Vegas to Washington, returning Sat, Jan 10, priced at $257 just found
United
Wed, Feb 25 - Mon, Mar 2
LAS
Las Vegas
IAD
Washington
$357 Roundtrip, just found
$357
Roundtrip
just found
Select United flight, departing Wed, Feb 25 from Las Vegas to Washington, returning Mon, Mar 2, priced at $357 just found
American Airlines
Wed, Feb 25 - Mon, Mar 2
LAS
Las Vegas
IAD
Washington
$377 Roundtrip, just found
$377
Roundtrip
just found
Select American Airlines flight, departing Wed, Feb 25 from Las Vegas to Washington, returning Mon, Mar 2, priced at $377 just found

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

May is typically the cheapest month to fly

From $116 - $501 per traveler.

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 center is 8 minutes. Flights from $137
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $137
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
$130
Distance
2060 mi
Average flight time
8 hours 40 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 November. 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 $70 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?
Get a cheap one-way flight from $70 or cheap return flight from $130 from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
Flying in November can help you save, as it's the cheapest month for flights between LAS and IAD. You'll often find the lowest fares during off-peak months.
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 Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest LAS to IAD flight.
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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*Available to One Key members.