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Dulles Intl

$329+ Cheap flights from Cape Cod and the Islands 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ACK — IAD
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
1 adult, Economy
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Cheap flight deals from Cape Cod and the Islands to Dulles Intl

Keep the following information in mind while searching for Cape Cod and the Islands to Dulles Intl flight deals. Data was last updated October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

November

Cheapest in

January

Average price

$210
Provider with most accurate pricing for Boston Logan Intl-Washington, D.C. (WAS) flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Washington, D.C. (WAS) flights.
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Highest demand for flights based on searches. 4% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Cape Cod and the Islands to Dulles Intl

Cheapest flights from Cape Cod and the Islands to Dulles Intl
Explore the most affordable flight options available from Cape Cod and the Islands to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 2, 2025.

This United deal was found by Cheapflights users on 9/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:00 amMVY - IAD
2 stops9h 05mMultiple Airlines
Wed 10/1510:19 pmIAD - MVY
2 stops17h 21mMultiple Airlines
Deal found 9/30$775
This United deal was found by Cheapflights users on 10/1. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/102:43 pmMVY - IAD
1 stop16h 28mMultiple Airlines
Mon 10/138:50 amIAD - MVY
1 stop7h 23mMultiple Airlines
Deal found 10/1$1,194

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cape Cod and the Islands 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 October 2, 2025.
Use the filters below to find and compare flights from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Cape Cod and the Islands

Fly to

Dulles Intl

Route

Depart

Return

Price

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Wed 10/15

4:38 pm-2:25 pm

3 stops45h 47m

$329

HyannisWashington, D.C.

HYA - IAD

HYAIAD

Hyannis Barnstable

Tue 10/7

9:57 am-4:05 pm

2 stops6h 08m

$343

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Thu 10/23

11:05 am-4:20 pm

1 stop5h 15m

$552

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Tue 10/14

5:36 pm-7:46 pm

3 stops26h 10m

$608

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Fri 10/10

10:15 pm-4:20 pm

2 stops18h 05m

$657

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Sat 10/11

4:24 pm-11:14 am

2 stops18h 50m

$657

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Sun 10/19

1:43 pm-3:49 pm

3 stops26h 06m

$702

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/30

Best time to book a flight from Cape Cod and the Islands to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Cape Cod and the Islands 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 Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Cape Cod and the Islands 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 are the most popular routes from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport?

    The most popular route from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport is West Tisbury Martha's Vineyard - Washington, D.C. Dulles Intl. You may also consider Nantucket Memorial - Washington, D.C. Dulles Intl or Hyannis Barnstable - Washington, D.C. Dulles Intl.

  • Can I find deals for flights from Cape Cod and the Islands to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Cape Cod and the Islands to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Cape Cod and the Islands to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cape Cod and the Islands to Dulles Intl.

  • Can I find deals for business class flights from Cape Cod and the Islands to Dulles Intl?

    Yes. Cheapflights offers flight deals from Cape Cod and the Islands 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 Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Cape Cod and the Islands 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
Springfield
Hanover
Gaithersburg
Fredericksburg
Fairfax
Linthicum Heights
Falls Church
Owings Mills
Manassas
Oxon Hill
Laurel
Towson
National Harbor
Dundalk
Waldorf

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