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Cheap flights from Boston to Washington, D.C. Dulles Intl Airport from £61

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 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
22 Jan — 29 Jan1
1 adult

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 17 January 2025.

Round-trip from

£91

One-way from

£61

Popular in

April

Cheapest in

January

Average price

£174
Frontier
  • Frontier
  • 14/4-21/4
  • 2 total stops
  • 18h 44m total
  • Boston to Washington, D.C.
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United Airlines
  • United Airlines
  • 18/2
  • Nonstop
  • 1h 46m total
  • Boston to Washington, D.C.
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High demand for flights, 8% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for round-trip flights in January 2025
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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 17 January 2025.

Mon 14/405:10BOS - IAD
1 stop9h 25mFrontier
Tue 15/417:52IAD - BOS
1 stop6h 55mFrontier
Deal found 16/1£91
Fri 7/209:35BOS - IAD
Nonstop1h 46mUnited Airlines
Tue 11/208:20IAD - BOS
Nonstop1h 35mUnited Airlines
Deal found 17/1£120
Fri 14/206:00BOS - IAD
1 stop5h 25mDelta
Tue 18/206:00IAD - BOS
1 stop6h 04mDelta
Deal found 16/1£223

Find flights from Boston to Dulles Intl within your budget

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 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 14/4

05:10-14:35

1 stop9h 25m

Washington, D.C. Dulles Intl

Mon 21/4

15:25-00:44

1 stop9h 19m

£91

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 7/2

09:35-11:21

Nonstop1h 46m

Washington, D.C. Dulles Intl

Mon 10/2

22:24-23:59

Nonstop1h 35m

£120

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 14/2

06:00-11:25

1 stop5h 25m

Washington, D.C. Dulles Intl

Wed 19/2

06:00-12:04

1 stop6h 04m

£223

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 18/2

14:00-15:46

Nonstop1h 46m

£61

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 14/2

06:00-11:25

1 stop5h 25m

£101

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 22/1

07:25-16:18

2 stops8h 53m

£329

Flights are sorted by cheapest return flights first.

Deals found on 17/1

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.

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 return flight from Boston to Dulles Intl. Price data was last updated on 10 January 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 £938). 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 17 January 2025.

When flying from Boston to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 17 January 2025.

The most flights from BOS to IAD are scheduled on a Thursday (16 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 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 17 January 2025.
To help decide which airline to fly from Boston to Washington, D.C., see what other customers have to say about United Airlines and Delta. 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.
Delta
8.0
Very Good
8,512 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

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

Delta
8.0
Very Good
8,512 reviews
Delta
8.0
Very Good
8,512 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

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

United Airlines
7.4
Good
8,965 reviews
Delta
8.0
Very Good
8,512 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

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

Frontier
6.1
Okay
3,438 reviews
Delta
8.0
Very Good
8,512 reviews
Check prices

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

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?

    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 13 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 Frontier is currently your cheapest option to Washington, D.C. Dulles Intl Airport, with prices starting at £91. Additional return tickets that might be worth considering are offered by United Airlines and Delta, with the lowest prices starting at £120 and £223, respectively. Users have found that Frontier is 61% cheaper than the other options available to this destination.

  • 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 (96%), Air China (94%) and ANA (93%).

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

    On average you can expect to pay £971 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £85 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at £112.

  • 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 £938). 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
Arlington
Woodbridge
College Park
Laurel
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Alternative routes for Boston to Dulles Intl

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Why should you use Cheapflights to find cheap flight tickets from Boston to Dulles Intl?

Cheapflights helps you find that perfect flight to Dulles Intl from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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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