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

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

  Cheapflights users have found 15 Alaska Airlines flights for under $400 on the BOS-SEA route. Prices on flights to Seattle from Boston 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 8,672 Alaska Airlines reviews by Cheapflights users is 6.4 (out of a maximum rating of 10). If you are considering flying BOS-SEA with Cheapflights, apply your desired dates to the form above to see our best pricing for your trip to Seattle with Alaska Airlines.

Currently, the most affordable month to book a Alaska Airlines flight from Boston to Seattle in January, with an average price of $247. Conversely, traveling with Alaska Airlines from Boston to Seattle in July will be the most expensive, with an average cost of $407. 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 Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).