£78 Cheap Flights from Boston (BOS) to Washington (IAD)

View £78 flight on Tue, 9 Jun 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to Washington Dulles International Airport (IAD)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Boston (BOS) to Washington (IAD)

Prices were available within the past 7 days and start at £78 for one-way flights and £169 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, 17 May - Wed, 27 May
BOS
Boston
IAD
Washington
£169 Return, found 6 days ago
£169
Return
found 6 days ago
Select United flight, departing Sun, 17 May from Boston to Washington, returning Wed, 27 May, priced at £169 found 6 days ago
United
Tue, 19 May - Sun, 24 May
BOS
Boston
IAD
Washington
£182 Return, found 6 days ago
£182
Return
found 6 days ago
Select United flight, departing Tue, 19 May from Boston to Washington, returning Sun, 24 May, priced at £182 found 6 days ago
Delta
Tue, 23 Jun - Sat, 4 Jul
BOS
Boston
IAD
Washington
£183 Return, found 3 days ago
£183
Return
found 3 days ago
Select Delta flight, departing Tue, 23 Jun from Boston to Washington, returning Sat, 4 Jul, priced at £183 found 3 days ago
United
Fri, 8 May - Sat, 9 May
BOS
Boston
IAD
Washington
£183 Return, found 3 days ago
£183
Return
found 3 days ago
Select United flight, departing Fri, 8 May from Boston to Washington, returning Sat, 9 May, priced at £183 found 3 days ago
United
Thu, 21 May - Wed, 27 May
BOS
Boston
IAD
Washington
£184 Return, found 6 days ago
£184
Return
found 6 days ago
Select United flight, departing Thu, 21 May from Boston to Washington, returning Wed, 27 May, priced at £184 found 6 days ago
Delta
Sat, 6 Jun - Tue, 23 Jun
BOS
Boston
IAD
Washington
£186 Return, found 3 days ago
£186
Return
found 3 days ago
Select Delta flight, departing Sat, 6 Jun from Boston to Washington, returning Tue, 23 Jun, priced at £186 found 3 days ago
Delta
Thu, 7 May - Sat, 9 May
BOS
Boston
IAD
Washington
£186 Return, found 3 days ago
£186
Return
found 3 days ago
Select Delta flight, departing Thu, 7 May from Boston to Washington, returning Sat, 9 May, priced at £186 found 3 days ago
Delta
Thu, 7 May - Sat, 9 May
BOS
Boston
IAD
Washington
£190 Return, found 3 days ago
£190
Return
found 3 days ago
Select Delta flight, departing Thu, 7 May from Boston to Washington, returning Sat, 9 May, priced at £190 found 3 days ago
American Airlines
Fri, 15 May - Mon, 18 May
BOS
Boston
IAD
Washington
£201 Return, found 6 days ago
£201
Return
found 6 days ago
Select American Airlines flight, departing Fri, 15 May from Boston to Washington, returning Mon, 18 May, priced at £201 found 6 days ago
Alaska Airlines
Thu, 17 Sept - Tue, 22 Sept
BOS
Boston
IAD
Washington
£456 Return, found 6 days ago
£456
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 17 Sept from Boston to Washington, returning Tue, 22 Sept, priced at £456 found 6 days ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £176
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city centre8 min
Flights from £176

Frequently asked questions

How much does a flight from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
One-way flights typically cost between £379 and £1,100 and return flights often range between £379 and £1,100. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
February is typically the cheapest month to fly from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.), with average return fares of approximately £304. This is about 19% lower than the average price throughout the year. February often sees lower prices as it's outside of peak holiday travel periods, leading to less demand. Other cheap months to fly from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) include January and September.
Which airlines fly direct from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter BOS to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Boston, MA (BOS-Logan Intl.) (BOS) to Washington, DC (IAD-Washington Dulles Intl.) (IAD) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, UA typically offers the lowest fares. DL offers the most daily flights from Boston, MA (BOS-Logan Intl.) (BOS) to Washington, DC (IAD-Washington Dulles Intl.) (IAD), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
When looking for the best time to fly from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.), it's helpful to consider both price and popularity. Based on booking data from the past year, the cheapest months to fly are typically January and February, with average return flights around £304. However, the most popular months for this route are July and November, which means you'll find plenty of flight options during these times. Since there isn't an overlap between the cheapest and most popular months, you'll need to decide what's most important for your trip: saving money in the quieter months or having more schedule flexibility during peak travel times.
How many flights per day from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 4 nonstop flights per day from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.). For even more choice, look at flights that include layovers, as there are around 89 connecting flights per day. Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), Liberty Intl. (EWR), and O'Hare Intl. (ORD).
What is the earliest flight from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in June, July, and August. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) on a Friday, with around 40 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Delta Air Lines, United Airlines, and American Airlines. Fridays offer notably more flight options compared to other days of the week, making it a popular choice for travellers.
What are the most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are between 9am and 12pm. About 26% of passengers prefer this time. Many major carriers, including United Airlines, Delta Air Lines and American Airlines, offer flights during this window. This timing works well for many travellers as it allows for a productive morning before heading to the airport, or an early afternoon arrival at your destination.
How long does it take to fly from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Direct flights from BOS to IAD usually take about 1 hour 50 minutes, traveling roughly 411 miles. If you opt for a connecting flight, expect to add around 4 hours 10 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for BOS to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from Logan Intl. (BOS)?
From Logan Intl. (BOS), you can fly into Ronald Reagan Washington National (DCA) and Washington Dulles Intl. (IAD) in Washington. Some flights may connect through major hubs like Nantucket Memorial (ACK), Baltimore Washington Intl. Thurgood Marshall (BWI), Lebanon Municipal (LEB) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Boston, MA (BOS-Logan Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Logan Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Return price
£169
Distance
657 km
Average flight time
2 hours 59 mins

Book with confidence

Compare flights from Boston to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Boston to Washington. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Washington Dulles Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Logan Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Logan Intl. (BOS) to Washington Dulles Intl. (IAD)

The easiest way to view the best deals on flights from Boston to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Logan Intl. to Washington Dulles Intl. start at just £169 and range up to £456.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Boston and Washington
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Boston to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Logan Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Boston to Washington easily and book with confidence

Explore a world of travel with Expedia

*Available to Expedia members.