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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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
Sep 2 — Sep 91
Wed 9/2
Wed 9/9
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 December or January, booked 68 days in advance, depart on a Friday or Saturday and return on a Saturday

Cheap 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 August 3, 2026.

This Frontier deal was found by Cheapflights users on 7/31. 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.
Sat 9/512:45 pm
BOS
-
IAD
1 stop10h 07m
Frontier
Sun 9/68:39 pm
IAD
-
BOS
1 stop12h 02m
Frontier
Deal found 7/31$160
This United Airlines deal was found by Cheapflights users on 7/31. 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 8/272:28 pm
BOS
-
IAD
Nonstop1h 41m
United Airlines
Mon 8/316:16 am
IAD
-
BOS
1 stop3h 32m
United Airlines
Deal found 7/31$161
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/45:45 am
BOS
-
IAD
Nonstop1h 35m
United Airlines
Sun 9/610:15 pm
IAD
-
BOS
Nonstop1h 44m
United Airlines
Deal found 7/29$162
This United Airlines deal was found by Cheapflights users on 7/29. 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 10/205:45 am
BOS
-
IAD
Nonstop1h 35m
United Airlines
Fri 10/308:37 am
IAD
-
BOS
1 stop3h 49m
United Airlines
Deal found 7/29$163
This Frontier deal was found by Cheapflights users on 7/31. 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.
Fri 8/2812:45 pm
BOS
-
IAD
1 stop10h 07m
Frontier
Sun 8/308:39 pm
IAD
-
BOS
1 stop12h 02m
Frontier
Deal found 7/31$164
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/45:45 am
BOS
-
IAD
Nonstop1h 35m
United Airlines
Mon 9/710:15 pm
IAD
-
BOS
Nonstop1h 44m
United Airlines
Deal found 7/30$166
This Super.com deal was found by Cheapflights users on 7/30. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:45 pm
BOS
-
IAD
1 stop10h 07m
Frontier
Fri 9/1111:12 am
IAD
-
BOS
1 stop23h 39m
Frontier
Deal found 7/30$167
This Frontier deal was found by Cheapflights users on 8/2. 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 10/269:15 am
BOS
-
IAD
1 stop9h 54m
Frontier
Sat 10/318:04 pm
IAD
-
BOS
1 stop14h 12m
Frontier
Deal found 8/2$169
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:36 am
BOS
-
IAD
1 stop7h 38m
Frontier
Sat 9/54:52 pm
IAD
-
BOS
1 stop16h 17m
Frontier
Deal found 7/30$170
This United Airlines deal was found by Cheapflights users on 7/31. 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 8/226:00 pm
BOS
-
IAD
1 stop4h 59m
United Airlines
Mon 8/246:16 am
IAD
-
BOS
1 stop3h 32m
United Airlines
Deal found 7/31$171

Find 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 August 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$156
(Super.com)

One-way from

$75
(Jetabroad)

Popular in

June

Cheapest in

December

Average price

$326

Good round-trip deal

$340 or less

Good one-way deal

$222 or less
Provider with most accurate pricing for Boston Logan Intl-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Washington, D.C. Dulles Intl flights.
Search Deals
From Boston Logan Intl to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Boston Logan Intl to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Boston Logan Intl to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Boston Logan Intl to Washington, D.C. Dulles Intl.
Search Deals

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 August 3, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 9/18

5:45 am-7:20 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Sun 9/20

6:15 am-9:48 am

1 stop3h 33m

$161

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 9/29

7:38 am-11:25 am

1 stop3h 47m

Washington, D.C. Dulles Intl

Wed 9/30

10:15 pm-11:59 pm

Nonstop1h 44m

$161

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 8/29

5:45 am-7:20 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 9/2

6:16 am-11:17 am

1 stop5h 01m

$161

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 9/21

6:00 pm-10:59 pm

1 stop4h 59m

Washington, D.C. Dulles Intl

Wed 9/23

8:35 am-10:18 am

Nonstop1h 43m

$161
Quickest round-trip

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 9/29

5:45 am-7:20 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Fri 10/2

10:15 pm-11:59 pm

Nonstop1h 44m

$200

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 9/5

7:23 pm-9:08 pm

Nonstop1h 45m

Washington, D.C. Dulles Intl

Mon 9/7

10:15 pm-11:59 pm

Nonstop1h 44m

$204

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 10/20

9:30 am-11:11 am

Nonstop1h 41m

Washington, D.C. Dulles Intl

Thu 10/22

1:10 pm-2:55 pm

Nonstop1h 45m

$216

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 9/26

5:45 am-7:20 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 9/30

10:15 pm-11:59 pm

Nonstop1h 44m

$221

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 9/4

7:00 pm-10:59 pm

1 stop3h 59m

Washington, D.C. Dulles Intl

Tue 9/8

5:28 pm-7:19 pm

Nonstop1h 51m

$227

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 8/22

6:00 pm-10:59 pm

1 stop4h 59m

Washington, D.C. Dulles Intl

Wed 8/26

8:35 am-10:18 am

Nonstop1h 43m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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?

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 67 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, December is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $248). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $371). 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 August 3, 2026.

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 morning, which can drop the price by up to 27% versus a flight at noon.

How much does it cost to fly round-trip from Boston to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Boston to Washington, D.C. Dulles Intl Airport flights typically cost between $255 and $440 in September.
The cheapest round-trip price found within the last 5 days was $156 on Frontier (Sep 2-Sep 9).

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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Boston to Washington, D.C. Dulles Intl Airport trip
Our travel experts
Paul Rubio

Paul Rubio

Expert on Ethiopian Air and BOS

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 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

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 August 3, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andJetBlue 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
7.8
Good
8,483 reviews

Comfort

7.8

Overall

7.8

Entertainment

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
Delta
7.8
Good
8,483 reviews
Delta
7.8
Good
8,483 reviews

Comfort

7.8

Overall

7.8

Entertainment

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
United Airlines
7.4
Good
10,057 reviews
Delta
7.8
Good
8,483 reviews

Comfort

7.8

Overall

7.8

Entertainment

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
JetBlue
7.2
Good
3,027 reviews
Delta
7.8
Good
8,483 reviews

Comfort

7.8

Overall

7.8

Entertainment

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Cidalia,Aug 2023

BOS - MIA

I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours

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 20 flights from Logan Intl to Washington, D.C. Dulles Intl per day from 3 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 35m. United Airlines provides one of the quickest options available for as low as $161. 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, Delta ($84), JetBlue ($131), and United Airlines ($160) offers the cheapest pricing from Boston to Washington, D.C. Dulles Intl Airport. Users have found that Delta is 72% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Boston to Washington, D.C. Dulles Intl Airport one-way?

    $83 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $84 and $88, respectively.

  • 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%), Air China (94%), Ethiopian Air( 93%).

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

    On average you can expect to pay $1,063 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $131 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $117.

  • 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, December is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $248). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $371). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Sterling
Clinton
Oxon Hill
Hunt Valley
Woodbridge

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Boston to Dulles Intl

Discover the top 3 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 August 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$84Average$198FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$131Average$267FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$160Average$301FlexibilityNo cancel feeOn-time69%

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