Cheap Alaska Airlines flights Seattle (SEA) to Washington (IAD)

You’ll find affordable return Alaska Airlines flights from SEA to IAD by filtering your results from “Price (lowest to highest)” on Expedia. Or look for deals 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.

Browse for return or one-way flights to Washington in January or February. You could find a cheap fare with Alaska Airlines during these off-season months.

To find cheap Alaska Airlines fares from Seattle - Tacoma Intl. Airport (SEA) to Washington Dulles Intl. Airport (IAD), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect the overall price. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**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.

Alaska Airlines has direct flights from Seattle - Tacoma Intl. Airport (SEA) to Washington Dulles Intl. Airport (IAD), with 7 departures each week. Just apply the “Nonstop” and “Airline” filters while searching on Expedia to find all direct Alaska Airlines flights to IAD.

From takeoff till landing, a nonstop Alaska Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Washington Dulles Intl. Airport (IAD) typically takes 5h 3m.

The earliest Alaska Airlines flight from SEA to IAD takes off at 9:54AM UTC-8, arriving at 5:57PM UTC-5. If you want to jet off later, the last Alaska Airlines flight leaves SEA at 9:54AM UTC-8 and touches down at IAD at 5:57PM UTC-5. Flying early is often a good option as morning flights are less likely to experience cancellations.**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.

When heading from Seattle - Tacoma Intl. Airport (SEA) to Washington with Alaska Airlines, you’ll probably touch down at Washington Dulles Intl. Airport (IAD). This is the airline’s main hub in this destination. Other nearby airports such as Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) may have cheaper tickets, so it’s smart to consider all options on Expedia.

Alaska Airlines makes traveling from SEA to IAD more comfortable with top-tier customer service and a rewarding loyalty program. You even have the chance to collect points with Mileage Plan. Remember to join Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be on a Boeing 737-900 or a Boeing 737 MAX 9 when flying Alaska Airlines from Seattle - Tacoma Intl. Airport (SEA) to Washington Dulles Intl. Airport (IAD). However, keep in mind that a different aircraft may be assigned depending on operational requirements.

You can usually cancel or change your flight, although there may be a charge if you made your booking over 24 hours ago. Need flexible options? Use our “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you have to adjust your plans. To make modifications, visit “Trips,” select your flight and click on “Manage Booking” for more details.