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Dulles Intl

$83+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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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 51 days in advance, depart on a Friday or Thursday 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 julio 31, 2025.

Round-trip from

$144
(United Airlines)

One-way from

$83
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$308

Good round-trip deal

$382 or less

Good one-way deal

$215 or less
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. 7% potential increase in price ($24 potential increase over avg. RT price).
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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 July 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 julio 31, 2025.

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.
sáb. 8/305:30 amBOS - IAD
Nonstop1h 40mUnited Airlines
mié. 9/33:55 pmIAD - BOS
Nonstop1h 39mUnited Airlines
Deal found 7/30$144
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/1411:31 amBOS - IAD
1 stop8h 51mAllegiant Air
lun. 8/183:13 pmIAD - BOS
1 stop18h 01mAllegiant Air
Deal found 7/31$190
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/2312:53 pmBOS - IAD
1 stop7h 55mFrontier
sáb. 8/309:33 pmIAD - BOS
1 stop11h 02mFrontier
Deal found 7/29$205

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 julio 31, 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

sáb. 8/30

5:30 am-7:10 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

mié. 9/3

3:55 pm-5:34 pm

Nonstop1h 39m

$144

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

jue. 8/14

11:31 am-8:22 pm

1 stop8h 51m

Washington, D.C. Dulles Intl

lun. 8/18

3:13 pm-9:14 am

1 stop18h 01m

$190

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

sáb. 8/23

12:53 pm-8:48 pm

1 stop7h 55m

Washington, D.C. Dulles Intl

sáb. 8/30

9:33 pm-8:35 am

1 stop11h 02m

$205

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

jue. 8/7

11:31 am-8:20 pm

1 stop8h 49m

$83

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

vie. 9/5

1:00 pm-2:43 pm

Nonstop1h 43m

$87

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

sáb. 8/23

12:53 pm-8:48 pm

1 stop7h 55m

$99

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

lun. 9/1

6:05 am-12:02 pm

1 stop5h 57m

$124

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

mié. 8/20

6:05 am-10:44 am

2 stops28h 39m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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

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 July 25, 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, July is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $306). Flying from Boston to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 julio 31, 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 21% 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 July 27, 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. Tuesday mornings 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 julio 31, 2025.

The most flights from BOS to IAD are scheduled on a Thursday (19 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 on average).

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 julio 31, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and Allegiant Air 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
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Allegiant Air
7.2
Good
702 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.9
Fair
3,239 reviews
Delta
8.0
Very good
7,981 reviews

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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, United Airlines ($144), Allegiant Air ($190), and Frontier ($205) offers the cheapest pricing from Boston to Washington, D.C. Dulles Intl Airport. Users have found that United Airlines is 48% 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 Allegiant Air. You may also be able to find cheap deals on United Airlines and Frontier, with prices starting from $87 and $99, 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%), Republic Airways (100%), Ethiopian Air( 100%).

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

    On average you can expect to pay $1,424 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $133 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at $144.

  • 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, July is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of $306). Flying from Boston to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Bowie

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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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$51Average$119FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$68Average$346FlexibilityNo cancel feeOn-time62%
DeltaCheapest$108Average$248FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$153Average$283FlexibilityNo cancel feeOn-time69%

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