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Dulles Intl

$214+ 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 6/11. Fares are subject to change and may not be available on all flights or dates of travel.
MVY — IAD
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
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 January 12, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$491
(United Airlines)

One-way from

$148
(Delta)

Popular in

November

Cheapest in

January

Average price

$178
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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From Cape Cod and the Islands to Washington, D.C. Dulles Intl
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One-way flight from Cape Cod and the Islands to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 11% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 12, 2026.

This United Airlines deal was found by Cheapflights users on 1/11. 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.
Fri 5/294:15 pm
ACK
-
IAD
1 stop6h 45m
United Airlines
Sun 5/316:00 am
IAD
-
ACK
1 stop3h 56m
United Airlines
Deal found 1/11$491
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Tue 7/144:15 pm
ACK
-
IAD
1 stop6h 45m
United Airlines
Wed 7/156:00 am
IAD
-
ACK
1 stop3h 56m
United Airlines
Deal found 1/11$608
This Delta deal was found by Cheapflights users on 1/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/292:10 pm
ACK
-
IAD
1 stop5h 06m
Delta
Sun 5/3110:40 am
IAD
-
ACK
2 stops7h 25m
Delta
Deal found 1/11$623
This United Airlines deal was found by Cheapflights users on 1/11. 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.
Sat 6/64:15 pm
ACK
-
IAD
1 stop6h 45m
United Airlines
Sun 6/76:00 am
IAD
-
ACK
1 stop3h 56m
United Airlines
Deal found 1/11$654
This Delta deal was found by Cheapflights users on 1/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/62:10 pm
ACK
-
IAD
1 stop5h 06m
Delta
Sun 6/710:40 am
IAD
-
ACK
2 stops7h 25m
Delta
Deal found 1/11$814

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 January 12, 2026.
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

Fri 5/29

4:15 pm-11:00 pm

1 stop6h 45m

Washington, D.C. Dulles Intl

Sun 5/31

6:00 am-9:56 am

1 stop3h 56m

$491

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Fri 5/29

2:10 pm-7:16 pm

1 stop5h 06m

Washington, D.C. Dulles Intl

Sun 5/31

10:40 am-6:05 pm

2 stops7h 25m

$623

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Sat 6/6

4:15 pm-11:00 pm

1 stop6h 45m

Washington, D.C. Dulles Intl

Sun 6/7

6:00 am-9:56 am

1 stop3h 56m

$654

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Sat 6/6

2:10 pm-7:16 pm

1 stop5h 06m

Washington, D.C. Dulles Intl

Sun 6/7

10:40 am-6:05 pm

2 stops7h 25m

$814

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Fri 6/12

3:10 pm-7:16 pm

1 stop4h 06m

$214

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Thu 6/11

3:10 pm-7:16 pm

1 stop4h 06m

$214

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Mon 7/6

4:15 pm-11:00 pm

1 stop6h 45m

$474

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Sun 6/14

4:15 pm-11:00 pm

1 stop6h 45m

$474

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Sun 6/14

1:53 pm-3:37 pm

2 stops25h 44m

$681

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Mon 5/25

3:10 pm-7:16 pm

1 stop4h 06m

$684

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/11

Showing 1-10 of 11 results
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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.

  • How long is the flight from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport?

    United Airlines and Delta can get you from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport in just under 5h 06m. Your travel time can differ by up to 1h 39m. Airlines will cover a distance of 421 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 Nantucket Memorial - Washington, D.C. Dulles Intl. You may also consider Hyannis Barnstable - Washington, D.C. Dulles Intl or West Tisbury Martha's Vineyard - 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.

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
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Hanover
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Upper Marlboro

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