Find Alaska Airlines(AS) flights from Seattle to Boston

At the moment, you can catch a nonstop flight from Seattle to Boston with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes about 5 hours 30 minutes to fly from Seattle to Boston.

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Boston is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

Based on Trip.com data in the past 4 weeks, there is 54 flight per week flying from Seattle to Boston. You can check the weekly schedule for popular airlines on this route below: Delta Air Lines: S/M/T/W/T/F/S -- DL459 (08:06)

The cheapest months to fly from Seattle to Boston is October, when demand for travel is lower.

After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Seattle to Boston on December 8, 2025 with American Airlines, with prices starting at IDR 3,504,111.

You can land at any one of the following hubs in Boston, with Seattle–Tacoma International Airport to Logan International Airport (SEA-BOS) is by far the most common option on this route: Hartford Barnes Airport (BNH) Logan International Airport (BOS) Portsmouth International Airport at Pease (PSM).

The time difference between Boston and Seattle is 3h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.