$168 Find Cheap Flights from Seattle to Boston

The cheapest month for flights from Seattle to Boston is January, where tickets cost $369 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $878 and $827 respectively.

To get a below average price on the flight from Seattle to Boston, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

In the past 3 days, the cheapest return tickets from Seattle to Boston were found on JetBlue ($335) and Hawaiian Airlines ($403).

Seattle and Boston are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (28 flights per week), Delta (19 flights per week), and JetBlue (7 flights per week).

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are between 7 and 8 direct flights that take off from Seattle and land in Boston, with an average flight time of 5h 25m. The most common departure time is 15:00 and most flights take off in the morning. Each week, there are 54 flights. The most frequent day of departure is Monday, when 15% of all weekly flights depart. The fewest flights depart on a Saturday.

Direct flights from Seattle generally make it to Boston in 5h 16m. The flying distance between the two cities is 6,441 km.

Early birds can take the earliest flight from Seattle at 07:25 and will be landing in Boston at 16:00.

If you prefer to fly at night, the latest flight from Seattle to Boston jets off at 23:40 and lands at 08:00.