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Cheap flights from Boston to Washington, D.C. Dulles Intl Airport from £62

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
20 Apr — 27 Apr1
1 adult

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 Wednesday or Monday and return on a Monday

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 15 April 2025.

Round-trip from

£122

One-way from

£62

Popular in

October

Cheapest in

January

Average price

£235

Good one-way deal

£176 or less
United Airlines
  • United Airlines
  • 7/5-10/5
  • Nonstop
  • 3h 20m total
  • Boston to Washington, D.C.
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United Airlines
  • United Airlines
  • 7/5
  • Nonstop
  • 1h 41m total
  • Boston to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£14 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
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Average for round-trip flights in April 2025
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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 15 April 2025.

Wed 7/512:30BOS - IAD
Nonstop1h 41mUnited Airlines
Sat 10/515:55IAD - BOS
Nonstop1h 39mUnited Airlines
Deal found 13/4£122
Sat 26/405:30BOS - IAD
1 stop6h 01mDelta
Tue 29/409:20IAD - BOS
1 stop6h 40mDelta
Deal found 14/4£200

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 15 April 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

Wed 7/5

12:30-14:11

Nonstop1h 41m

Washington, D.C. Dulles Intl

Sat 10/5

15:55-17:34

Nonstop1h 39m

£122

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 26/4

17:55-23:07

1 stop5h 12m

Washington, D.C. Dulles Intl

Wed 30/4

12:11-18:59

1 stop6h 48m

£200

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 7/5

09:30-11:11

Nonstop1h 41m

£62

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 29/8

06:00-11:55

1 stop5h 55m

£94

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 13/6

11:37-14:32

2 stops26h 55m

£103

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 7/5

07:00-23:58

1 stop16h 58m

£203

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 28/4

17:50-16:22

2 stops22h 32m

£215

Flights are sorted by cheapest return flights first.

Deals found on 14/4

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 return 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 return flight from Boston to Dulles Intl. Price data was last updated on 11 April 2025.

To ensure you get the cheapest price possible for a flight from Boston to Washington, D.C. Dulles Intl Airport, you should look to book at least 51 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Boston to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 15 April 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 morning, which can drop the price by up to 41% versus a flight at midday.

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 15 April 2025.

The most flights from BOS to IAD are scheduled on a Monday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 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 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 15 April 2025.
To help decide which airline to fly from Boston to Washington, D.C., see what other customers have to say about Alaska Airlines, Delta and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
9,871 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very Good
9,871 reviews
Alaska Airlines
8.0
Very Good
9,871 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very Good
7,917 reviews
Alaska Airlines
8.0
Very Good
9,871 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,656 reviews
Alaska Airlines
8.0
Very Good
9,871 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very Good
9,871 reviews
Check prices

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.1

Entertainment

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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?

    Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Logan Intl; the airport handles an average of 16 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Boston airport to Washington, D.C. Dulles Intl. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.

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

    Flying on United Airlines is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at £122. Another option worth looking into is Delta, starting at £200 return. Users have found that United Airlines is 41% 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?

    One-way options have recently been found by users for as low as £62 on United Airlines. Other airlines that offer cheap prices include Delta from £94 and Alaska Airlines from £203 one-way.

  • What are the most reliable airlines from Boston to Washington, D.C. Dulles Intl Airport?

    The top 3 most reliable airlines when flying from Boston to Washington, D.C. Dulles Intl Airport are Egyptair (100%), Air China (100%) and Ethiopian Air (95%).

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

    On average you can expect to pay £176 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £176 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at £304.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Boston to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Silver Spring
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Why should you use Cheapflights to find cheap flight tickets from Boston to Dulles Intl?

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Can Cheapflights find flights from Boston to Dulles Intl with no change fees?

Yes, we can. To see specific flights from Boston to Dulles Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Boston to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Boston today and book when prices fit your budget.

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