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Dulles Intl

$108+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ACK — IAD
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
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 August 7, 2025.

Round-trip from

$222
(Delta)

One-way from

$108
(Delta)

Popular in

November

Cheapest in

January

Average price

$177
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. 5% potential increase in price ($10 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 August 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 August 7, 2025.

This Delta deal was found by Cheapflights users on 8/6. 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 8/223:26 pmACK - IAD
1 stop4h 17mDelta
Tue 8/266:00 amIAD - ACK
2 stops10h 09mDelta
Deal found 8/6$222
This American Airlines deal was found by Cheapflights users on 8/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/202:03 pmMVY - IAD
2 stops8h 53mAmerican Airlines
Sat 8/236:34 amIAD - MVY
1 stop4h 33mAmerican Airlines
Deal found 8/7$272
This United Airlines deal was found by Cheapflights users on 8/5. 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 8/226:46 pmACK - IAD
1 stop4h 13mUnited Airlines
Tue 8/268:40 amIAD - ACK
1 stop6h 40mUnited Airlines
Deal found 8/5$276
This American Airlines deal was found by Cheapflights users on 8/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/221:41 pmACK - IAD
2 stops9h 15mAmerican Airlines
Sun 8/246:34 amIAD - ACK
2 stops6h 30mAmerican Airlines
Deal found 8/7$397
This Delta deal was found by Cheapflights users on 8/7. 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 8/223:26 pmACK - IAD
1 stop4h 17mDelta
Sun 8/246:00 amIAD - ACK
2 stops8h 46mDelta
Deal found 8/7$448
This American Airlines deal was found by Cheapflights users on 8/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/202:03 pmMVY - IAD
2 stops8h 53mAmerican Airlines
Fri 8/227:25 pmIAD - MVY
2 stops17h 43mAmerican Airlines
Deal found 8/6$450
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 9/184:16 pmACK - IAD
1 stop6h 23mUnited Airlines
Fri 9/1910:33 pmIAD - ACK
2 stops16h 38mUnited Airlines
Deal found 8/6$495
This United deal was found by Cheapflights users on 8/6. 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.
Tue 8/191:01 pmHYA - IAD
1 stop25h 42mMultiple Airlines
Fri 8/2210:18 pmIAD - HYA
1 stop22h 09mMultiple Airlines
Deal found 8/6$531
This American Airlines deal was found by Cheapflights users on 8/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/222:03 pmMVY - IAD
2 stops8h 53mAmerican Airlines
Mon 8/257:25 pmIAD - MVY
2 stops18h 08mAmerican Airlines
Deal found 8/6$595
This United deal was found by Cheapflights users on 8/7. 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 8/2210:29 amHYA - IAD
2 stops10h 12mMultiple Airlines
Mon 8/2512:40 pmIAD - HYA
2 stops7h 47mMultiple Airlines
Deal found 8/7$596
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 8/216:46 pmACK - IAD
1 stop4h 13mUnited Airlines
Fri 8/2210:20 pmIAD - ACK
2 stops11h 59mUnited Airlines
Deal found 8/6$615
This United deal was found by Cheapflights users on 8/6. 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 8/810:29 amHYA - IAD
1 stop6h 01mMultiple Airlines
Sun 8/178:35 amIAD - HYA
2 stops12h 14mMultiple Airlines
Deal found 8/6$658

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 August 7, 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

Fri 8/22

3:26 pm-7:43 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Tue 8/26

6:00 am-4:09 pm

2 stops10h 09m

$222

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Wed 8/20

2:03 pm-10:56 pm

2 stops8h 53m

Washington, D.C. Dulles Intl

Sat 8/23

6:34 am-11:07 am

1 stop4h 33m

$272

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Fri 8/22

6:46 pm-10:59 pm

1 stop4h 13m

Washington, D.C. Dulles Intl

Tue 8/26

8:40 am-3:20 pm

1 stop6h 40m

$276

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Fri 8/22

1:41 pm-10:56 pm

2 stops9h 15m

Washington, D.C. Dulles Intl

Sun 8/24

6:34 am-1:04 pm

2 stops6h 30m

$397

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Fri 8/22

3:26 pm-7:43 pm

1 stop4h 17m

Washington, D.C. Dulles Intl

Sun 8/24

6:00 am-2:46 pm

2 stops8h 46m

$448

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Wed 8/20

2:03 pm-10:56 pm

2 stops8h 53m

Washington, D.C. Dulles Intl

Fri 8/22

7:25 pm-1:08 pm

2 stops17h 43m

$450

NantucketWashington, D.C.

ACK - IAD

ACKIAD

Nantucket Memorial

Thu 9/18

4:16 pm-10:39 pm

1 stop6h 23m

Washington, D.C. Dulles Intl

Fri 9/19

10:33 pm-3:11 pm

2 stops16h 38m

$495

HyannisWashington, D.C.

HYA - IAD

HYAIAD

Hyannis Barnstable

Tue 8/19

1:01 pm-2:43 pm

1 stop25h 42m

Washington, D.C. Dulles Intl

Fri 8/22

10:18 pm-8:27 pm

1 stop22h 09m

$531

West TisburyWashington, D.C.

MVY - IAD

MVYIAD

West Tisbury Martha's Vineyard

Fri 8/22

2:03 pm-10:56 pm

2 stops8h 53m

Washington, D.C. Dulles Intl

Mon 8/25

7:25 pm-1:33 pm

2 stops18h 08m

$595

HyannisWashington, D.C.

HYA - IAD

HYAIAD

Hyannis Barnstable

Fri 8/22

10:29 am-8:41 pm

2 stops10h 12m

Washington, D.C. Dulles Intl

Mon 8/25

12:40 pm-8:27 pm

2 stops7h 47m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/7

Showing 1-10 of 41 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.

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 August 7, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,987 reviews
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,987 reviews

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 Hyannis Barnstable - Washington, D.C. Dulles Intl. You may also consider Nantucket Memorial - 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.

  • What is the cheapest month to book a flight from Cape Cod and the Islands to Washington, D.C. Dulles Intl Airport?

    Currently, July 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 $303). 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
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Easton
Fairfax
Manassas
Falls Church
Laurel
Rockville
Oxon Hill
Springfield
National Harbor
Dundalk
Waldorf

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