Cheap Alaska Airlines flights Boston (BOS) to Seattle (SEA)

You’ll find budget-friendly return Alaska Airlines flights from BOS to SEA by filtering your results from “Price (lowest to highest)” on Expedia. Or search for options 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.

January is one of the cheapest months to jet away to Seattle with Alaska Airlines. You could also find fantastic deals on one-way and round-trip tickets in February.

Begin your search one to three months ahead of your departure date to find cheap fares on Alaska Airlines flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA). 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.* Get your timing spot on, and you can enjoy significant savings on domestic flights.*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.

Choose from one of Alaska Airlines’s 12 direct weekly flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA). To view available options, enter your travel dates, origin and destination and hit search. Then select the “Nonstop” and “Airline” filters.

It takes around 6h 38m to travel nonstop from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.

If it’s flexibility you’re after, Saturday offers the most choice for Alaska Airlines flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA). You can select from 2 different departures.

The first flight from BOS to SEA with Alaska Airlines leaves at 7:00AM UTC-5. You’ll touch down at 10:38AM UTC-8. The last Alaska Airlines flight of the day leaves at 5:55PM UTC-5 and arrives at 9:34PM UTC-8. With approximately 20% fewer cancellations for early and mid-morning departures, setting off early is usually the smartest choice.**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.

Hop on an Alaska Airlines flight from Logan Intl. Airport (BOS) to Seattle, and you’ll probably arrive at Seattle - Tacoma Intl. Airport (SEA). This is the airline’s primary hub here.

Jetting off from BOS to SEA with Alaska Airlines comes with plenty of perks, such as an excellent in-flight experience and top-tier customer service. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s on top of 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 board a Boeing 737 MAX 9 or a Boeing 737-800 when flying Alaska Airlines from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA). However, keep in mind that a different aircraft may be assigned due to operational demands.

Changes are generally free within 24 hours of making your booking, but your airline may add a charge after that. For further information about altering your reservation, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to adjust your plans without being charged, check the “Changes included” or “No cancel fee” filter when planning your next adventure.