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Cheap flights from Boston to Washington, D.C. Dulles Intl Airport from £48

BOS — IAD
4 Dec — 11 Dec1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. Dulles Intl are usually found in January or December, booked 77 days in advance, depart on a Tuesday or Monday and return on a Monday

Cheap flight deals from Boston to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Dulles Intl

Tue 1/1219:33 -
Nonstop1h 47m
Thu 3/1208:40 -
Nonstop1h 39m
Deal found 3/11£87
Tue 8/1214:36 -
Nonstop1h 47m
Sat 12/1208:40 -
Nonstop1h 39m
Deal found 3/11£94
Wed 2/1219:33 -
Nonstop1h 47m
Fri 4/1217:30 -
Nonstop1h 42m
Deal found 4/11£97
Mon 23/1105:30 -
Nonstop1h 40m
Fri 27/1108:40 -
Nonstop1h 39m
Deal found 2/11£104
Tue 1/1219:33 -
Nonstop1h 47m
Tue 29/1208:40 -
Nonstop1h 40m
Deal found 4/11£108
Wed 30/1205:45 -
Nonstop1h 47m
Fri 1/122:20 -
Nonstop1h 39m
Deal found 1/11£116
Thu 26/1114:40 -
Nonstop1h 47m
Tue 1/1222:19 -
Nonstop1h 40m
Deal found 4/11£119
Thu 26/1105:30 -
Nonstop1h 40m
Wed 9/1208:40 -
Nonstop1h 39m
Deal found 1/11£119
Wed 2/1214:36 -
Nonstop1h 47m
Thu 3/1208:35 -
1 stop3h 52m
Deal found 30/10£120
Wed 25/1118:05 -
1 stop4h 21m
Tue 1/1222:19 -
Nonstop1h 40m
Deal found 31/10£124

Find flight deals from Boston to Dulles Intl

Round-trip from

£87

One-way from

£48

Popular in

October

Cheapest in

January

Average price

£233

Good one-way deal

£682 or less
United Airlines
  • United Airlines
  • 1/12-4/12
  • Nonstop
  • 3h 20m total
  • Boston to Washington, D.C.
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United Airlines
  • United Airlines
  • 6/1-31/12
  • 1 total stop
  • 4h 03m total
  • Boston to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£18 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in November 2026
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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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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Boston to Washington, D.C. Dulles Intl Airport that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Wed 13/1

12:26-16:29

1 stop4h 03m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£48

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Fri 15/1

12:26-16:29

1 stop4h 03m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£69
Fastest return journey

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Mon 23/11

05:30-07:10

Nonstop1h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£78

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Thu 31/12

05:45-07:32

Nonstop1h 47m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£78

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Wed 16/12

05:45-07:25

Nonstop1h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£78

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Wed 17/2

05:45-07:34

Nonstop1h 49m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£78

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Thu 26/11

05:30-07:10

Nonstop1h 40m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£89

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Fri 18/12

06:05-11:49

1 stop5h 44m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£96

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Thu 31/12

05:30-11:56

1 stop6h 26m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£96

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Sun 22/11

05:30-10:57

1 stop5h 27m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£97

Flights are sorted by cheapest return flights first.

Deals found on 31/10

Showing 1-10 of 24 resultsSorted by cheapest first
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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

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?

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 76 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 £186). Flying from Boston to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of £302). 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?

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.

How much does it cost for a return flight from Boston to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Boston to Washington, D.C. Dulles Intl Airport flights typically cost between £170 and £353 in December.
The cheapest return price found within the last 5 days was £87 on United Airlines (1 Dec–4 Dec).

Related info for your journey

  • 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 12 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.

  • How long is the flight from Boston to Washington, D.C. Dulles Intl Airport?

    There are many flights that can get you from Boston to Washington, D.C. Dulles Intl Airport in 3h 53m. Fly via United Airlines to get the fastest option. There are 411 mi between Boston and Washington, D.C. Dulles Intl Airport.

  • 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 Ethiopian Air (97%), Air China (94%) and Egyptair (92%).

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

    On average you can expect to pay £682 for a flight from Boston to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is £682 while the most popular route, (Boston Logan Intl - Washington, D.C. Dulles Intl) is currently priced at £192.

  • 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 £186). Flying from Boston to Washington, D.C. Dulles Intl Airport in October is currently the most expensive (average of £302). 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 Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Alexandria
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Glen Burnie
Springfield
Sterling

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Boston to Dulles Intl

Boston to Reagan-National flights

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

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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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