HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$61+ 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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.

The best prices from Boston Logan Intl to Washington, D.C. Dulles Intl are usually found in January or August, booked 51 days in advance, depart on a Friday or Wednesday and return on a Thursday

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$110
(Frontier)

One-way from

$61
(Frontier)

Popular in

April

Cheapest in

January

Average price

$277

Good round-trip deal

$334 or less

Good one-way deal

$161 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. 6% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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

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 February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/256:00 amBOS - IAD
1 stop7h 16mFrontier
Tue 3/255:54 pmIAD - BOS
1 stop6h 40mFrontier
Deal found 2/20$108
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/195:30 amBOS - IAD
Nonstop1h 44mUnited Airlines
Thu 3/208:50 amIAD - BOS
Nonstop1h 35mUnited Airlines
Deal found 2/20$118
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/25:15 amBOS - IAD
3 stops30h 11mMultiple Airlines
Mon 4/75:40 pmIAD - BOS
3 stops28h 12mMultiple Airlines
Deal found 2/20$242
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/286:00 amBOS - IAD
1 stop5h 25mDelta
Sat 3/112:05 pmIAD - BOS
1 stop5h 44mDelta
Deal found 2/20$257
This American Airlines deal was found by Cheapflights users on 2/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1212:00 pmBOS - IAD
2 stops11h 58mAmerican Airlines
Sat 3/156:27 amIAD - BOS
1 stop7h 13mAmerican Airlines
Deal found 2/20$299

Find flights from Boston to Dulles Intl within your budget

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 February 20, 2025.

Fly from

Boston

Fly to

Dulles Intl

Route

Depart

Return

Price

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 3/25

6:00 am-1:16 pm

1 stop7h 16m

Washington, D.C. Dulles Intl

Tue 3/25

5:54 pm-12:34 am

1 stop6h 40m

$108

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 3/19

5:30 am-7:14 am

Nonstop1h 44m

Washington, D.C. Dulles Intl

Thu 3/20

8:50 am-10:25 am

Nonstop1h 35m

$118

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 4/2

5:15 am-11:26 am

3 stops30h 11m

Washington, D.C. Dulles Intl

Mon 4/7

5:40 pm-9:52 pm

3 stops28h 12m

$242

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 3/3

6:00 am-11:25 am

1 stop5h 25m

Washington, D.C. Dulles Intl

Mon 3/3

5:16 pm-11:37 pm

1 stop6h 21m

$257

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 3/12

12:00 pm-11:58 pm

2 stops11h 58m

Washington, D.C. Dulles Intl

Sat 3/15

6:27 am-1:40 pm

1 stop7h 13m

$299

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 4/2

6:00 am-5:04 pm

1 stop11h 04m

$61

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sun 3/23

5:30 am-7:14 am

Nonstop1h 44m

$69

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 4/8

11:14 am-11:20 am

3 stops24h 06m

$114

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sun 5/25

6:00 am-11:51 am

1 stop5h 51m

$124

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sun 5/18

6:00 am-1:22 pm

1 stop7h 22m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 12 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 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.

Travel insights for flights from Boston to Dulles Intl

Get recent, data-driven insights about flights from Boston to Dulles Intl including ideal travel times, pricing trends, and more.

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 February 14, 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 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, August is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 February 20, 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 afternoon, which can drop the price by up to 37% versus a flight at noon.

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 February 16, 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. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Boston to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Boston to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 20, 2025.

The most flights from BOS to IAD are scheduled on a Thursday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

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.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

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).

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 February 20, 2025.
Get a feel of what it's like to fly with Delta, United Airlines and Allegiant Air from Boston to Washington, D.C. by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Allegiant Air
7.3
Good
765 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Sun Country Air
7.0
Good
374 reviews
Delta
8.0
Very good
8,220 reviews

Food

7.3

Overall

8.0

Comfort

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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

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

    According to our current data, Frontier ($110), United Airlines ($118), and American Airlines ($257) offers the cheapest pricing from Boston to Washington, D.C. Dulles Intl Airport. Users have found that Frontier is 61% 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?

    $61 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $69 and $124, 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 (96%), Air China (94%), ANA( 92%).

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

    On average you can expect to pay $1,070 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $94 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, August is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 Boston?

Book flights to Boston if you plan to visit one of these locations
Arlington
Alexandria
Fairfax
Springfield
Rockville
Tysons
Gaithersburg
Silver Spring
Fredericksburg
Linthicum Heights
Laurel
Falls Church
Woodbridge
Sterling
Easton
Herndon
Bowie
Reston
National Harbor
Oxon Hill

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$46Average$85FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$73Average$197FlexibilityNo cancel feeOn-time62%
DeltaCheapest$153Average$248FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$155Average$285FlexibilityNo 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.