HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$89+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
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 Wednesday

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 May 11, 2026.

This United Airlines deal was found by Cheapflights users on 5/6. 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.
Wed 6/35:45 am
BOS
-
IAD
Nonstop1h 38m
United Airlines
Sat 6/610:10 pm
IAD
-
BOS
Nonstop1h 49m
United Airlines
Deal found 5/6$164
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Wed 5/275:44 pm
BOS
-
IAD
1 stop5h 35m
United Airlines
Wed 6/310:10 pm
IAD
-
BOS
Nonstop1h 49m
United Airlines
Deal found 5/8$167
This United Airlines deal was found by Cheapflights users on 5/6. 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 6/235:45 am
BOS
-
IAD
Nonstop1h 38m
United Airlines
Tue 6/306:33 am
IAD
-
BOS
1 stop4h 43m
United Airlines
Deal found 5/6$169
This United Airlines deal was found by Cheapflights users on 5/7. 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.
Wed 7/155:45 am
BOS
-
IAD
Nonstop1h 38m
United Airlines
Wed 7/295:25 pm
IAD
-
BOS
Nonstop1h 49m
United Airlines
Deal found 5/7$171
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Wed 5/277:27 pm
BOS
-
IAD
Nonstop1h 49m
United Airlines
Thu 5/2810:10 pm
IAD
-
BOS
Nonstop1h 49m
United Airlines
Deal found 5/8$177
This United Airlines deal was found by Cheapflights users on 5/7. 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 6/162:15 pm
BOS
-
IAD
Nonstop1h 42m
United Airlines
Sat 6/2010:10 pm
IAD
-
BOS
Nonstop1h 49m
United Airlines
Deal found 5/7$182
This United Airlines deal was found by Cheapflights users on 5/7. 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 5/285:45 am
BOS
-
IAD
Nonstop1h 38m
United Airlines
Mon 6/110:10 pm
IAD
-
BOS
Nonstop1h 49m
United Airlines
Deal found 5/7$184
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Tue 6/96:00 am
BOS
-
IAD
1 stop17h 17m
Frontier
Tue 6/167:30 am
IAD
-
BOS
1 stop17h 57m
Frontier
Deal found 5/10$188
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Mon 6/19:29 am
BOS
-
IAD
1 stop6h 17m
Multiple Airlines
Mon 6/811:07 am
IAD
-
BOS
1 stop20h 45m
Multiple Airlines
Deal found 5/10$189

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 May 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$164
(United Airlines)

One-way from

$89
(United Airlines)

Popular in

June

Cheapest in

December

Average price

$287

Good round-trip deal

$324 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.
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. 4% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 11, 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

Wed 7/8

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Mon 7/13

10:10 pm-11:59 pm

Nonstop1h 49m

$182

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 5/28

9:30 am-11:12 am

Nonstop1h 42m

Washington, D.C. Dulles Intl

Mon 6/1

12:35 pm-5:57 pm

1 stop5h 22m

$194

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 6/18

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Sun 6/21

10:10 pm-11:59 pm

Nonstop1h 49m

$217

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sun 5/24

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Sun 5/24

10:10 pm-11:59 pm

Nonstop1h 49m

$223

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 6/3

9:30 am-11:12 am

Nonstop1h 42m

Washington, D.C. Dulles Intl

Wed 6/10

5:25 pm-7:14 pm

Nonstop1h 49m

$223

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sun 5/31

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Wed 6/3

10:10 pm-11:59 pm

Nonstop1h 49m

$227

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 7/3

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Sat 7/11

10:10 pm-11:59 pm

Nonstop1h 49m

$227

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 6/13

2:15 pm-3:57 pm

Nonstop1h 42m

Washington, D.C. Dulles Intl

Wed 6/17

10:10 pm-11:59 pm

Nonstop1h 49m

$227

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 7/31

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Sun 8/2

6:33 am-11:16 am

1 stop4h 43m

$227
Quickest round-trip

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 6/9

5:45 am-7:23 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Tue 6/9

12:58 pm-2:43 pm

Nonstop1h 45m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/7

Showing 1-10 of 21 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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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?

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 $247). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $349). 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 May 11, 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 69% versus a flight in the afternoon.

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

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 May 11, 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
7.9
Good
8,452 reviews

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,452 reviews
Delta
7.9
Good
8,452 reviews

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,700 reviews
Delta
7.9
Good
8,452 reviews

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
JetBlue
7.2
Good
2,973 reviews
Delta
7.9
Good
8,452 reviews

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Spirit Airlines
6.3
Okay
8,634 reviews
Delta
7.9
Good
8,452 reviews

Entertainment

7.8

Comfort

7.8

Food

7.2

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 17 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 38m. United Airlines provides one of the quickest options available for as low as $182. 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 ($70), Delta ($80), and JetBlue ($131) offers the cheapest pricing from Boston to Washington, D.C. Dulles Intl Airport. Users have found that Spirit Airlines is 76% 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?

    $84 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Delta and JetBlue, with prices starting from $88 and $89, 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%), Ethiopian Air (98%), ANA( 92%).

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

    On average you can expect to pay $566 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $108 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $137.

  • 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 $247). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $349). 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
Tysons
Owings Mills
Springfield
Arlington
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Silver Spring
Hanover
Laurel
Woodbridge
Waldorf
Largo
Clinton
Hunt Valley
Cordova
Reston

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.

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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$70Average$145FlexibilityNo cancel feeOn-time65%
DeltaCheapest$80Average$256FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$131Average$287FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$161Average$296FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights