Cheap flights from Boston to Washington, D.C. from £45

The cheapest month to fly to Washington, D.C. from Boston is in January. Flight prices, which tend to average around £167, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in January, then you should wait until December to fly from Boston, when ticket prices are also cheap, with an average price of £169.

On average, the least expensive day to fly to Washington, D.C. from Boston is on a Sunday. momondo users have found tickets for Sunday departures for as low as £217. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Tuesday is the most expensive day to depart from Boston because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £331.

In the evening is the cheapest time of day to fly from Boston to Washington, D.C. when you can find flight prices for as low as £174. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly at midday, with an average ticket price of £368. Departure times at midday fall within the peak daily travel times, which is why tickets can be more expensive.

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 £232 when searching weeks before you fly. 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 £175 on momondo.

There are 3 cabin classes available to choose from on Boston 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 11% on your flight if you consider stops on a Boston to Washington, D.C. flight.

As of October 2026, prices for Boston to Washington, D.C. flights are approximately 39% more expensive when compared to flights at the same time last year.

Historically, on average around 20% 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 133 minutes.

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

Saturday is statistically the day of the week that experiences the fewest 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 fewest delays on this route over the last 12 months, with about 18% of their flights experiencing any sort of delay.

As of October 2026, there are 71 flights per day flying from Boston to Washington, D.C.. The most common time of day flights depart is 09:00, with 34% of flights taking off in the afternoon.

501 flights are operational weekly from Boston to Washington, D.C. as of October 2026. The most popular departure day for this route is Thu, with 19% of flights per week taking off on this day.