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Dulles Intl

$75+ 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Find cheap flights from Boston to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. Dulles Intl are usually found in January or March, booked 59 days in advance, depart on a Friday or Saturday and return on a Wednesday

Cheap flight deals from Boston to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$144
(United Airlines)

One-way from

$75
(Priceline)

Popular in

June

Cheapest in

January

Average price

$308

Good round-trip deal

$275 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Boston Logan Intl-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Washington, D.C. Dulles Intl flights.
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From Boston Logan Intl to Washington, D.C. Dulles Intl
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One-way flight from Boston Logan Intl to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Boston Logan Intl to Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Boston Logan Intl to Washington, D.C. Dulles Intl.
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Find flight deals from Boston to Dulles Intl

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 October 23, 2025.

This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:30 amBOS - IAD
Nonstop1h 43mUnited Airlines
Wed 11/125:33 pmIAD - BOS
1 stop5h 14mUnited Airlines
Deal found 10/22$144
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:30 amBOS - IAD
Nonstop1h 43mUnited Airlines
Sun 11/99:00 amIAD - BOS
Nonstop1h 38mUnited Airlines
Deal found 10/22$145
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:30 amBOS - IAD
Nonstop1h 43mUnited Airlines
Mon 11/1710:07 pmIAD - BOS
Nonstop1h 35mUnited Airlines
Deal found 10/22$146
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:30 amBOS - IAD
Nonstop1h 43mUnited Airlines
Thu 11/69:00 amIAD - BOS
Nonstop1h 38mUnited Airlines
Deal found 10/21$147
This Kiwi.com deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/111:43 amBOS - IAD
1 stop12h 12mMultiple Airlines
Tue 11/48:40 amIAD - BOS
2 stops15h 19mMultiple Airlines
Deal found 10/22$149
This United Airlines deal was found by Cheapflights users on 10/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/19:30 amBOS - IAD
Nonstop1h 43mUnited Airlines
Tue 11/410:07 pmIAD - BOS
Nonstop1h 35mUnited Airlines
Deal found 10/21$152
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/15:30 amBOS - IAD
Nonstop1h 43mUnited Airlines
Mon 11/35:33 pmIAD - BOS
1 stop5h 09mUnited Airlines
Deal found 10/22$153
This Frontier deal was found by Cheapflights users on 10/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/279:50 amBOS - IAD
1 stop5h 49mFrontier
Fri 10/318:36 pmIAD - BOS
1 stop11h 52mFrontier
Deal found 10/20$156

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 23, 2025.
Use the filters below to find and compare flights from Boston to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Boston

Fly to

Dulles Intl

Route

Depart

Return

Price

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 11/6

5:30 am-7:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 11/12

5:33 pm-10:47 pm

1 stop5h 14m

$144

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 11/19

5:30 am-7:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 11/23

10:07 pm-11:42 pm

Nonstop1h 35m

$147

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 11/1

2:21 pm-4:08 pm

Nonstop1h 47m

Washington, D.C. Dulles Intl

Mon 11/3

5:33 pm-10:42 pm

1 stop5h 09m

$155

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 12/9

5:30 am-7:14 am

Nonstop1h 44m

Washington, D.C. Dulles Intl

Wed 12/10

12:51 pm-2:29 pm

Nonstop1h 38m

$157

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 11/17

5:30 am-7:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Tue 11/18

9:00 am-10:38 am

Nonstop1h 38m

$157

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 11/4

5:30 am-7:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Wed 11/5

10:07 pm-11:42 pm

Nonstop1h 35m

$157

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 10/30

5:30 am-7:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Fri 10/31

6:00 am-10:43 am

1 stop4h 43m

$157

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 10/28

9:30 am-11:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Fri 10/31

6:00 am-10:43 am

1 stop4h 43m

$157

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 12/17

12:02 pm-4:30 pm

1 stop4h 28m

Washington, D.C. Dulles Intl

Sat 1/3

10:17 pm-11:54 pm

Nonstop1h 37m

$163

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 10/31

5:30 am-7:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sat 11/1

10:07 pm-11:42 pm

Nonstop1h 35m

$182

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

Showing 1-10 of 21 results
1
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Compare providers for flights from Boston to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Boston to Dulles Intl in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Boston-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boston-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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 October 17, 2025.

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 59 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, May is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $132). Flying from Boston to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $181). 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 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 October 23, 2025.

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 evening, which can drop the price by up to 63% versus a flight in the afternoon.

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 October 19, 2025.

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. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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

Economy Class offers 32-inch pitch and personal entertainment monitors on most aircraft.


Cloud 9 passengers enjoy real Champagne and Ethiopian dishes like doro wot.

Read more about Ethiopian Airby Paul Rubio
United Airlines

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


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

Read more about United Airlinesby Harriet Baskas
Airports
BOS

Use the FlyLogan App to pre-order meals and save time at BOS. Most eateries participate, making it a convenient option.

Read more about BOSby Paul Rubio
IAD

Take the Washington Metro Silver Line to reach downtown from IAD in under 40 minutes. It's a cost-effective option.

Read more about IADby Ramsey Qubein
Our travel experts
Paul Rubio

Paul Rubio

Expert on Ethiopian Air and BOS

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated October 23, 2025.
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.
Delta
7.9
Good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,981 reviews
Delta
7.9
Good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,992 reviews
Delta
7.9
Good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
JetBlue
7.2
Good
2,908 reviews
Delta
7.9
Good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Spirit Airlines
6.3
Okay
8,099 reviews
Delta
7.9
Good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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?

    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 9 flights from Logan Intl to Washington, D.C. Dulles Intl per day from 4 different airlines.

  • 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 $144. 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 82% cheaper than the other options available to this destination.

  • 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: Egyptair (100%), Ethiopian Air (100%), Air China( 94%).

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

    On average you can expect to pay $825 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $98 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $97.

  • 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.

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

    Currently, May is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $132). Flying from Boston to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $181). 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.

See more FAQs

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

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Springfield
Silver Spring
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Largo
Oxon Hill
Laurel
Towson
National Harbor
Waldorf

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Top 4 airlines flying from Boston to Dulles Intl

Discover the top 4 airlines that operate flights from Boston to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$51Average$121FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$68Average$287FlexibilityNo cancel feeOn-time62%
DeltaCheapest$84Average$277FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$156Average$280FlexibilityNo cancel feeOn-time69%

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