Alaska Airlines flights from Seattle to Boston (SEA - BOS)

• Can I get a flight from Seattle to Boston on Alaska Airlines for under $400?

  Cheapflights users have found 21 Alaska Airlines flights for under $400 on the SEA-BOS route. Prices on flights to Boston from Seattle can vary based on many factors including dates. To look at price based on your preferred dates, click here.

• How do most travelers feel about Alaska Airlines?

  The average rating from 8,675 Alaska Airlines reviews by Cheapflights users is 6.4 (out of a maximum rating of 10). If you are considering flying SEA-BOS with Cheapflights, apply your desired dates to the form above to see our best pricing for your trip to Boston with Alaska Airlines.

Currently, the most affordable month to book a Alaska Airlines flight from Seattle to Boston in January, with an average price of $218. Conversely, traveling with Alaska Airlines from Seattle to Boston in July will be the most expensive, with an average cost of $328. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).