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$137+ Cheap flights from Dulles Intl (IAD) to Nantucket (ACK)

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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ACK
Aug 11 — Aug 181
Tue 8/11
Tue 8/18
1 adult, Economy
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Cheap flight deals from Dulles Intl to Nantucket

Cheapest flights from Dulles Intl to Nantucket
Explore the most affordable flight options available from Dulles Intl to Nantucket. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 12, 2026.

This American Airlines deal was found by Cheapflights users on 7/9. 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.
Mon 8/35:03 am
IAD
-
ACK
2 stops7h 23m
American Airlines
Fri 8/72:03 pm
ACK
-
IAD
2 stops8h 52m
American Airlines
Deal found 7/9$277
This American Airlines deal was found by Cheapflights users on 7/12. 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.
Tue 8/116:10 am
IAD
-
ACK
2 stops9h 01m
American Airlines
Tue 8/182:03 pm
ACK
-
IAD
2 stops8h 52m
American Airlines
Deal found 7/12$278
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Sun 7/196:33 am
IAD
-
ACK
1 stop6h 47m
American Airlines
Fri 7/241:50 pm
ACK
-
IAD
1 stop5h 50m
American Airlines
Deal found 7/9$280
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Mon 8/36:33 am
IAD
-
ACK
1 stop3h 42m
United Airlines
Thu 8/134:15 pm
ACK
-
IAD
1 stop6h 44m
United Airlines
Deal found 7/9$296
This American Airlines deal was found by Cheapflights users on 7/8. 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.
Sun 8/25:03 am
IAD
-
ACK
2 stops10h 05m
American Airlines
Tue 8/412:56 pm
ACK
-
IAD
2 stops9h 09m
American Airlines
Deal found 7/8$297
This American Airlines deal was found by Cheapflights users on 7/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/195:03 am
IAD
-
ACK
2 stops10h 05m
American Airlines
Wed 7/2212:56 pm
ACK
-
IAD
2 stops11h 14m
American Airlines
Deal found 7/11$305
This American Airlines deal was found by Cheapflights users on 7/9. 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 8/56:10 am
IAD
-
ACK
2 stops9h 01m
American Airlines
Wed 8/1212:53 pm
ACK
-
IAD
2 stops10h 02m
American Airlines
Deal found 7/9$323
This United Airlines deal was found by Cheapflights users on 7/7. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:33 am
IAD
-
ACK
1 stop3h 42m
United Airlines
Thu 7/233:44 pm
ACK
-
IAD
1 stop5h 16m
United Airlines
Deal found 7/7$325
This American Airlines deal was found by Cheapflights users on 7/10. 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.
Sun 7/126:33 am
IAD
-
ACK
1 stop6h 47m
American Airlines
Fri 7/171:50 pm
ACK
-
IAD
1 stop5h 50m
American Airlines
Deal found 7/10$331
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Sun 7/266:33 am
IAD
-
ACK
1 stop3h 42m
United Airlines
Wed 7/293:44 pm
ACK
-
IAD
1 stop5h 16m
United Airlines
Deal found 7/8$346
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Sun 8/26:33 am
IAD
-
ACK
2 stops8h 35m
American Airlines
Fri 8/1411:17 am
ACK
-
IAD
2 stops9h 39m
American Airlines
Deal found 7/9$347
This American Airlines deal was found by Cheapflights users on 7/10. 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 8/127:57 am
IAD
-
ACK
2 stops7h 14m
American Airlines
Mon 8/1711:17 am
ACK
-
IAD
2 stops11h 38m
American Airlines
Deal found 7/10$349

Find flight deals from Dulles Intl to Nantucket

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Nantucket (ACK). 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 July 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$277
(American Airlines)

One-way from

$137
(United Airlines)

Popular in

June

Cheapest in

December

Average price

$285
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Nantucket Memorial flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Nantucket Memorial flights.
Search Deals
From Washington, D.C. Dulles Intl to Nantucket Memorial
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Nantucket Memorial
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Nantucket 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 July 12, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Nantucket that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Mon 8/10

6:33 am-10:15 am

1 stop3h 42m

Nantucket Memorial

Thu 8/13

4:15 pm-10:59 pm

1 stop6h 44m

$382

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Tue 8/25

8:36 am-3:03 pm

1 stop6h 27m

Nantucket Memorial

Thu 8/27

4:15 pm-10:59 pm

1 stop6h 44m

$382

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Sat 8/22

10:22 pm-3:49 pm

2 stops17h 27m

Nantucket Memorial

Wed 8/26

4:15 pm-10:59 pm

1 stop6h 44m

$456

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Sat 8/22

10:41 pm-9:12 am

1 stop10h 31m

Nantucket Memorial

Fri 8/28

4:15 pm-9:28 pm

1 stop5h 13m

$480

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Sun 8/16

8:35 am-3:03 pm

1 stop6h 28m

Nantucket Memorial

Wed 8/19

4:15 pm-10:59 pm

1 stop6h 44m

$492

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Tue 9/1

8:36 am-3:03 pm

1 stop6h 27m

Nantucket Memorial

Sun 9/6

4:45 pm-9:23 am

1 stop16h 38m

$504
Quickest round-trip

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Mon 8/3

6:33 am-10:15 am

1 stop3h 42m

Nantucket Memorial

Wed 8/5

3:44 pm-9:00 pm

1 stop5h 16m

$542

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Tue 9/1

8:36 am-3:03 pm

1 stop6h 27m

Nantucket Memorial

Sat 9/5

3:44 pm-7:35 am

2 stops15h 51m

$555
Cheapest one-way

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Sun 7/26

6:33 am-3:08 pm

2 stops8h 35m

$149
Quickest one-way

Washington, D.C.Nantucket

IAD - ACK

IADACK

Washington, D.C. Dulles Intl

Tue 7/28

6:33 am-10:15 am

1 stop3h 42m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 20 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Nantucket flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Nantucket flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Nantucket flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Nantucket flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Nantucket flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Nantucket

Have a flexible travel schedule? Discover the best time to fly to Nantucket from Dulles Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Nantucket. 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 into for flights to Nantucket from Washington, D.C. Dulles Intl?

    Nantucket Memorial (ACK) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Nantucket. You should not have trouble finding flights to Memorial from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Nantucket airport from Washington, D.C. Dulles Intl. It is only a 2.8 mi journey from Memorial (ACK) to Nantucket’s city center.

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

    Airlines like American Airlines and United Airlines fly from Washington, D.C. Dulles Intl Airport to Nantucket in about 3h 42m. The time it takes to get you to your destination can typically vary by up to 3h 41m. There are 421 mi between Washington, D.C. Dulles Intl Airport and Nantucket. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Dulles Intl to Nantucket that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to Nantucket?

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

  • Can I find deals for business class flights from Dulles Intl to Nantucket?

    Yes. Cheapflights offers flight deals from Dulles Intl to Nantucket by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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