$100 Cheap Alaska Airlines flights Las Vegas (LAS) to Washington (IAD)

View $100 flight on Wed, Aug 13, 2025Opens in a new window

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$100 Cheap Alaska Airlines flights Las Vegas (LAS) to Washington (IAD)

Prices were available within the past 7 days and start at $100 for one-way flights and $181 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Aug 7 - Sun, Aug 10
LAS
Las Vegas
IAD
Washington
$181 Roundtrip, found 10 hours ago
$181
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Thu, Aug 7 from Las Vegas to Washington, returning Sun, Aug 10, priced at $181 found 10 hours ago
Alaska Airlines
Thu, Jul 17 - Tue, Aug 26
LAS
Las Vegas
IAD
Washington
$224 Roundtrip, found 17 hours ago
$224
Roundtrip
found 17 hours ago
Select Alaska Airlines flight, departing Thu, Jul 17 from Las Vegas to Washington, returning Tue, Aug 26, priced at $224 found 17 hours ago
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
Popular airline
Frontier Airlines
Distance
2060 mi
Average flight time
8 hours 56 mins

Frequently asked questions

How much is an Alaska Airlines flight from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
You'll discover affordable return Alaska Airlines flights from $181 from LAS to IAD by filtering your results from "Price (lowest to highest)" on Expedia. Or search for options from $100 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from LAS to IAD with Alaska Airlines?
Alaska Airlines flights to Washington tend to be more affordable in the low-season months of January and February. Whether you're after a one-way or a return ticket, you could find a better deal then.
What is the cheapest time to book flights from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD) with Alaska Airlines?
Look for affordable Alaska Airlines flights from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD) one to three months ahead of your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and itinerary, the ideal day to book a domestic flight is generally Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Alaska Airlines fly nonstop from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
Enter your dates, click search and check "Nonstop" on Expedia to browse any direct flights from LAS to IAD with Alaska Airlines or other carriers.
What is the earliest Alaska Airlines flight from LAS to IAD?
Find Alaska Airlines's earliest flights from LAS to IAD by selecting the "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures are also 20% less likely to be canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Alaska Airlines fly into in Washington?
Washington Dulles Intl. Airport (IAD) is the primary Washington gateway for Alaska Airlines flights from Harry Reid Intl. Airport (LAS).
Why fly with Alaska Airlines from LAS to IAD?
Offering top-tier customer service and a rewarding loyalty program, Alaska Airlines is a popular option for many passengers heading from LAS to IAD. Plus, if you're a Mileage Plan and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future getaways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Alaska Airlines flight from Harry Reid Intl. Airport (LAS) to Washington Dulles Intl. Airport (IAD)?
Changes are generally free within 24 hours of making a booking, but your airline may add a charge after that time. For further information about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to adjust your plans without being charged, apply the "No cancel fee" or "Changes included" filter when planning your next trip.

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*Available to One Key members.