A modern airport control tower with a spherical top and a curved, white-roofed building in the foreground.

NT$4,084 Cheap Flights from Las Vegas (LAS) to Washington (IAD)

View NT$4,084 flight on Thu, 2026/8/13Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 45% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at NT$4,084 for one-way flights and NT$8,168 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$8,168 Roundtrip, found 4 days ago
NT$8,168
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$8,168 found 4 days ago
Delta
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$8,683 Roundtrip, found 4 days ago
NT$8,683
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$8,683 found 4 days ago
United
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$9,197 Roundtrip, found 4 days ago
NT$9,197
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$9,197 found 4 days ago
Delta
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$10,562 Roundtrip, found 4 days ago
NT$10,562
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$10,562 found 4 days ago
Delta
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$11,176 Roundtrip, found 4 days ago
NT$11,176
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$11,176 found 4 days ago
United
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$11,358 Roundtrip, found 4 days ago
NT$11,358
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$11,358 found 4 days ago
United
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$11,671 Roundtrip, found 4 days ago
NT$11,671
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$11,671 found 4 days ago
United
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$11,691 Roundtrip, found 4 days ago
NT$11,691
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$11,691 found 4 days ago
Delta
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$11,701 Roundtrip, found 4 days ago
NT$11,701
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$11,701 found 4 days ago
American Airlines
Thu, Aug 13 - Wed, Aug 19
LAS
Las Vegas
IAD
Washington
NT$12,657 Roundtrip, found 4 days ago
NT$12,657
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Aug 13 from Las Vegas to Washington, returning Wed, Aug 19, priced at NT$12,657 found 4 days ago

Frequently asked questions

How much is a flight from LAS to IAD?
Start packing your bags, because round-trip journeys from LAS to Washington Dulles Intl. Airport (IAD) start from NT$8,168. That's based on fares advertised within the last 7 days on Expedia for flights departing within the next year. Prices can go up quickly, so book now to score the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport?
Most flights can be conveniently canceled online, but whether or not you are charged a fee varies between airlines. If you do need to cancel your vacation, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Harry Reid Airport (formerly McCarran Airport) to IAD that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for LAS to Washington Dulles Intl. Airport (IAD) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport?
The average flight time between LAS (LAS) and IAD (IAD) is 8 hours and 1 minute. If you're traveling with kids, it's always a good idea to pack some fruit or snacks in your carry-on bag.
How far is the flight from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport?
Around 3,300 kilometers separates Las Vegas and Chantilly, so pack some entertainment to help you fill in a few hours. That action-packed novel you haven't finished will do the trick.
Which airlines fly direct from Harry Reid Airport (formerly McCarran Airport) to IAD?
United Airlines (UA) will take you from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport safely and comfortably. Choose from 60 direct flights each month on this route.
Are LAS to Dulles Intl. Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices are always on the move, so there are no guarantees. While last-minute flight deals between Harry Reid Airport (formerly McCarran Airport) and Dulles Intl. Airport are of course possible, it's also a good idea to keep a close eye on prices well before you fly. In fact, some airlines publish their prices up to 12 months prior to the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to grab your seat when fare prices drop.

Travel information

Origin airport
Harry Reid Intl.
Destination airport
Washington Dulles Intl.
Roundtrip price
NT$8,168
Distance
3297 km
Average flight time
9 hours 27 mins

Explore a world of travel with Expedia

*Available to Expedia members.