Cheap flights from Boston to Washington, D.C. from $48

The month of March is, on average, the cheapest month to fly to Washington, D.C. from Boston, with most prices found around $191. If you’re not able to fly to Washington, D.C. in March, then September is your next best option. Flight prices from Boston to Washington, D.C. during September average around $192.

On average, the least expensive day to fly to Washington, D.C. from Boston is on a Friday. momondo users have found tickets for Friday departures for as low as $295. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Washington, D.C. for around $384.

In the afternoon is the cheapest time of day to fly from Boston to Washington, D.C. when you can find flight prices for as low as $298. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $394. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Boston Logan Intl to Washington, D.C. Reagan-National for the best Boston Logan Intl - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $284 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Boston for as low as $189 on momondo.

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

You could potentially save up to 12% on your flight if you consider stops on a Boston to Washington, D.C. flight.

As of February 2026, prices for Boston to Washington, D.C. flights are approximately 62% more expensive when compared to flights at the same time last year.

Spirit Airlines, United Airlines, and Delta are the most popular carriers operating from Boston Logan Intl to Washington, D.C.

American Airlines, JetBlue and Southwest are the top three most popular airlines that fly to Washington, D.C. from Boston according to our data. American Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 6 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between Boston and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 129 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, American Airlines have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

The number of flights available between Boston and Washington, D.C. is 73 per day as of February 2026. The most frequent departure time is 5:00PM, with 48% of daily flights leaving in the afternoon.

The number of flights available between Boston and Washington, D.C. is 511 per week as of February 2026. The most frequent departure day is Sun, with 17% of weekly flights leaving on this day.