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

You can find cheap round-trip Alaska Airlines flights from SEA to BOS by organizing your results from “Price (lowest to highest)” on Expedia. Or look 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 Boston with Alaska Airlines. You could also find great prices on one-way and return tickets in February.

Search for affordable Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) one to three months prior to your departure day. 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. Regardless of fare class and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book 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.

Yes, you can travel from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) on one of Alaska Airlines’s 12 weekly direct flights. Use our “Nonstop” and “Airline” filters to find the Alaska Airlines flight that’ll take you to BOS at a time that suits you.

From takeoff to touchdown, a direct Alaska Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) takes approximately 5h 25m.

Alaska Airlines has the most flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) on Wednesday. With up to 2 daily departures, you’ll get the most options and flexibility on this day.

The first Alaska Airlines flight from SEA to BOS departs at 7:55AM UTC-8, landing at 4:24PM UTC-5. If you’d like to head off later, the last Alaska Airlines flight leaves SEA at 3:45PM UTC-8 and lands at BOS at 11:59PM UTC-5. Flying early is generally a good idea 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.

Logan Intl. Airport (BOS) is the main Boston hub for Alaska Airlines flights from Seattle - Tacoma Intl. Airport (SEA).

Alaska Airlines makes traveling from SEA to BOS more enjoyable with a rewarding loyalty program and an excellent in-flight experience. You could even start earning points with Mileage Plan. Be sure to sign up to 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.

For the Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) route, Alaska Airlines typically operates Boeing 737 MAX 9 and Boeing 737-800 planes. Don’t forget that last-minute changes can occur for operational demands, meaning your flight could be on a different aircraft.

Changes are usually free within 24 hours of booking, but your airline may charge you after that time. For further information about modifying your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to update your itinerary without additional costs, check the “Changes included” or “No cancel fee” filter when planning your next trip.