How long is the flight from Boston to Washington, D.C. Dulles Intl Airport?

A quick flight from Boston to Washington, D.C. Dulles Intl Airport can take about 1h 43m. United Airlines provides one of the quickest options available for as low as $157. Airlines will cover a distance of 411 mi. Generally, flights for this route are nonstop.

What are the cheapest airlines flying from Boston to Washington, D.C. Dulles Intl Airport round-trip?

According to our current data, Spirit Airlines ($51), JetBlue ($68), and Delta ($84) offers the cheapest pricing from Boston to Washington, D.C. Dulles Intl Airport. Users have found that Spirit Airlines is 81% cheaper than the other options available to this destination.

How far ahead should I book a flight from Boston to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from Boston to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Boston to Washington, D.C. Dulles Intl Airport?

Currently, July is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $302). Flying from Boston to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Boston to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Boston to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the cheapest flights from Boston to Washington, D.C. Dulles Intl Airport?

On average you can expect to pay $911 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $133 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $157.

What are the most reliable airlines from Boston to Washington, D.C. Dulles Intl Airport?

Before booking your flight to Washington, D.C. Dulles Intl Airport from Boston, check out the most reliable airlines to get you to your destination on time: Ethiopian Air (97%), Air China (94%), Egyptair( 92%).

What are the most popular airlines that fly from Boston to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from Boston to Washington, D.C. Dulles Intl Airport are JetBlue, Delta and Spirit Airlines. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Boston to Washington, D.C. Dulles Intl Airport?

Leaving on a Thursday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 74% on the overall cost on flights from Boston to Washington, D.C. Dulles Intl Airport.

How far in advance should I book a flight from Boston to Washington, D.C. Dulles Intl Airport?

Users have found that booking a flight from Boston to Washington, D.C. Dulles Intl Airport at least 36 days early can save you up to 79% on average compared to booking a flight this week. If booking 36 days before your flight isn’t an option for you, users have found flights from Boston to Washington, D.C. Dulles Intl Airport for as little as $179 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $334 for flights departing within the next 3 days.

What is the cheapest month to fly from Boston to Washington, D.C. Dulles Intl Airport?

January is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from Boston. Prices for January average $193 per person but you can even find prices for as low as $65. The most expensive prices can be found in the month of November. Opting for a January flight can save you 16% on your journey compared to booking in November

What is the cheapest time of day to fly from BOS to IAD?

When flying from Boston to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 21% versus a flight at noon.

What airport do you fly from for flights from Boston to Washington, D.C. Dulles Intl?

If you book a flight to Washington, D.C. Dulles Intl from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 8 flights from Logan Intl to Washington, D.C. Dulles Intl per day from 4 different airlines.

Can I find deals for flights from Boston to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Boston to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Boston to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Dulles Intl.

Can I find deals for business class flights from Boston to Dulles Intl?

Yes. Cheapflights offers flight deals from Boston to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$79+ Cheap Flights from Boston to Washington, D.C. Dulles Intl Airport

Round-trip from	$157 (United Airlines)
One-way from	$79 (United Airlines)
Popular in	June
Cheapest in	January
Average price	$292
Good round-trip deal	$376 or less
Good one-way deal	$230 or less

Basic Economy restricts carry-ons; only personal items allowed unless exceptions apply.

Economy Plus offers extra legroom and priority seating for MileagePlus Premier members.

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$51	Average$119	FlexibilityNo cancel fee	On-time65%
JetBlue	Cheapest$68	Average$297	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$84	Average$248	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$155	Average$286	FlexibilityNo cancel fee	On-time69%

$79+ Cheap flights from Boston (BOS) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. Dulles Intl are usually found in January or March, booked 61 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Boston to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Boston to Dulles Intl

Cheapest flights from Boston to Dulles IntlExplore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2025.

Explore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Washington, D.C. Dulles Intl Airport that are best for you.

The best insider tips for Boston to Washington, D.C. Dulles Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Boston to Washington, D.C. Dulles Intl Airport trip

Airlines

Ethiopian Air

United Airlines

Airports

BOS

IAD

Our travel experts

Best time to book a flight from Boston to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Boston with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Boston to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Boston to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Dulles Intl. Price data was last updated on August 8, 2025.

What is the cheapest month to book a flight from Boston to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from BOS to IAD?

Find hourly flight availability from Boston to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 19, 2025.

What is the cheapest day to fly from Boston to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Boston to Dulles Intl. Price data was last updated on August 17, 2025.

Reviews of airlines servicing Dulles Intl

Get a feel of what it's like to fly with Delta, United Airlines, and JetBlue from Boston to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boston to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Boston to Washington, D.C. Dulles Intl?

How long is the flight from Boston to Washington, D.C. Dulles Intl Airport?

What are the cheapest airlines flying from Boston to Washington, D.C. Dulles Intl Airport round-trip?

What are the most reliable airlines from Boston to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Boston to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Boston to Dulles Intl that include hotel bookings?

How can I find direct flights from Boston to Dulles Intl?

Can I find deals for business class flights from Boston to Dulles Intl?

What is the cheapest month to book a flight from Boston to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Boston to Dulles Intl

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Boston to Dulles Intl
Explore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 19, 2025.