Cheap flights from Boston to Washington from $139

The month of October is, on average, the cheapest month to fly to State of Washington from Boston, with most prices found around $349. If you aren’t able to travel to State of Washington during the month of October, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $366.

The cheapest day to depart from Boston to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $444. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Boston to State of Washington for around $574.

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $431. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $511 on average. Flights to State of Washington from Boston in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Boston Logan Intl to Seattle/Tacoma Intl for the best Boston Logan Intl - Washington flight prices

You are more likely to see cheaper flights to State of Washington from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $412 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Boston for as low as $374 on momondo.

There are 4 cabin classes available to choose from on Boston to State of Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, JetBlue, and Delta are the most popular carriers operating from Boston Logan Intl to Washington

Delta, Alaska Airlines and JetBlue are the top three most popular airlines that fly to State of Washington from Boston according to our data. Delta is the first choice among our users, with 39% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 8 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

As of August 2026, there are 35 flights per day flying from Boston to State of Washington. The most common time of day flights depart is 7:00AM, with 50% of flights taking off at noon.

As of August 2026, 250 flights take off from Boston and land in State of Washington each week. The most common flight departure day for this route is Sun, with 19% of weekly flights taking off on this day.