$117 Cheap Alaska Airlines flights Washington (IAD) to Las Vegas (LAS)

You’ll discover affordable round-trip Alaska Airlines flights from $184 from IAD to LAS by organizing your results from “Price (lowest to highest)” on Expedia. Or look for deals from $117 for a one-way journey.**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.

Browse for one-way or round-trip flights to Las Vegas in January or June. You could find lower fares with Alaska Airlines during these off-peak travel months.

Begin your search one to three months ahead of your departure date to get cheaper fares on Alaska Airlines flights from Washington Dulles Intl. Airport (IAD) to Harry Reid Intl. Airport (LAS). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic journeys.*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.

To see if there’s a direct trip from IAD to LAS with Alaska Airlines or other airlines, use our “Nonstop” filter when searching for tickets.

Browse Alaska Airlines’s earliest flights from IAD to LAS by checking our “Morning” and “Early Morning” filters. Not only will you get to where you’re going 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.

Alaska Airlines flights from Washington Dulles Intl. Airport (IAD) to Las Vegas come in to land at Harry Reid Intl. Airport (LAS). This is the main entry point here.

Offering an excellent in-flight experience and top-tier customer service, Alaska Airlines is a favorite for many passengers flying from IAD to LAS. What’s more, if you’re a Mileage Plan and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee will generally apply if you cancel or reschedule your booking more than 24 hours after it’s confirmed. To find flexible fares, select our “Changes included” and “No cancel fee” boxes when you look for flights. For additional information on changing or canceling your reservation, head to “Trips,” select your flight and tick “Manage Booking.”