Cheap Alaska Airlines flights Baltimore (BWI) to Seattle (SEA)

Make use of the “Price (lowest to highest)” filter on Expedia to look for cheap Alaska Airlines round-trip flights from BWI to SEA. Affordable one-way fares are available too.**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.

Alaska Airlines flights to Seattle tend to be more affordable in the low-season months of January and February. Whether you’re after a return or one-way ticket, you could score a better deal then.

Search for cheap Alaska Airlines flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Seattle - Tacoma Intl. Airport (SEA) one to three months ahead of your day of 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 usually Sunday and the most expensive day 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.

Hop on one of Alaska Airlines’s 5 direct weekly flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Seattle - Tacoma Intl. Airport (SEA). To view available options, enter your travel dates, origin and destination and hit search. Then use the “Nonstop” and “Airline” filters.

On average, it takes 6h 1m to fly nonstop from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.

Taking off from BWI at 6:59PM UTC-5, the first Alaska Airlines flight to SEA arrives at 10:00PM UTC-8. Flying earlier in the day means you’ll be less likely to experience delays.* After something later? The last Alaska Airlines flight from BWI to SEA departs at 6:59PM UTC-5 and touches down at 10:00PM UTC-8.*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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Seattle land at Seattle - Tacoma Intl. Airport (SEA). This is the main gateway here.

Jetting off from BWI to SEA with Alaska Airlines means enjoying a range of perks, such as a rewarding loyalty program and an excellent in-flight experience. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s in addition to the Mileage Plan points you can earn with Alaska Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

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

Depending on the type of fare you purchased, a fee typically applies if you cancel or reschedule your booking more than 24 hours after it’s confirmed. To secure tickets with more flexibility, select our “Changes included” or “No cancel fee” filter when you search for flights. For more details on modifying or canceling your reservation, head to “Trips,” select your flight and tick “Manage Booking.”