$98 Cheap Flights from Washington (IAD) to Nantucket (ACK)

View $98 flight on Tue, Jul 22, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Nantucket, MA (ACK-Nantucket Memorial)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Nantucket (IAD-ACK)

Prices were available within the past 7 days and start at $98 for one-way flights and $202 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Aug 12 - Wed, Aug 27
IAD
Washington
ACK
Nantucket
$202 Roundtrip, found 10 hours ago
$202
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Aug 12 from Washington to Nantucket, returning Wed, Aug 27, priced at $202 found 10 hours ago
Delta
Tue, Jul 15 - Thu, Jul 24
IAD
Washington
ACK
Nantucket
$217 Roundtrip, found 3 days ago
$217
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jul 15 from Washington to Nantucket, returning Thu, Jul 24, priced at $217 found 3 days ago
United
Mon, Sep 1 - Fri, Sep 5
IAD
Washington
ACK
Nantucket
$219 Roundtrip, found 5 days ago
$219
Roundtrip
found 5 days ago
Select United flight, departing Mon, Sep 1 from Washington to Nantucket, returning Fri, Sep 5, priced at $219 found 5 days ago
Delta
Tue, Jul 29 - Tue, Aug 12
IAD
Washington
ACK
Nantucket
$222 Roundtrip, found 3 days ago
$222
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jul 29 from Washington to Nantucket, returning Tue, Aug 12, priced at $222 found 3 days ago
Delta
Tue, Aug 5 - Thu, Aug 7
IAD
Washington
ACK
Nantucket
$227 Roundtrip, found 14 hours ago
$227
Roundtrip
found 14 hours ago
Select Delta flight, departing Tue, Aug 5 from Washington to Nantucket, returning Thu, Aug 7, priced at $227 found 14 hours ago
Delta
Wed, Jul 9 - Thu, Jul 17
IAD
Washington
ACK
Nantucket
$232 Roundtrip, found 7 hours ago
$232
Roundtrip
found 7 hours ago
Select Delta flight, departing Wed, Jul 9 from Washington to Nantucket, returning Thu, Jul 17, priced at $232 found 7 hours ago
United
Tue, Jul 15 - Fri, Jul 18
IAD
Washington
ACK
Nantucket
$235 Roundtrip, found 5 days ago
$235
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 15 from Washington to Nantucket, returning Fri, Jul 18, priced at $235 found 5 days ago
Delta
Tue, Jul 29 - Tue, Aug 19
IAD
Washington
ACK
Nantucket
$246 Roundtrip, found 3 days ago
$246
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jul 29 from Washington to Nantucket, returning Tue, Aug 19, priced at $246 found 3 days ago
Delta
Tue, Jul 29 - Wed, Aug 6
IAD
Washington
ACK
Nantucket
$248 Roundtrip, found 3 days ago
$248
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jul 29 from Washington to Nantucket, returning Wed, Aug 6, priced at $248 found 3 days ago
American Airlines
Tue, Aug 5 - Thu, Aug 7
IAD
Washington
ACK
Nantucket
$282 Roundtrip, found 14 hours ago
$282
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Tue, Aug 5 from Washington to Nantucket, returning Thu, Aug 7, priced at $282 found 14 hours ago

Alternative airports near Nantucket

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Martha's Vineyard MVY. Flights from $295
MVY
Martha's Vineyard
Flights from $295
Select flight to Barnstable Municipal HYA. Flights from $544
HYA
Barnstable Municipal
Flights from $544
Flights from Washington (IAD) to Nantucket (ACK)
Origin airport
Washington Dulles Intl.
Destination airport
Nantucket Memorial
Airlines serving
American Airlines, Delta, United
Roundtrip price
$201
Distance
421 mi

Washington to Nantucket Flights

The cheapest times to fly from Washington to Nantucket

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Nantucket are during the month of August. You can find some of the cheapest flights from Washington to Nantucket with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Nantucket

Sunday is one of the best days to book for cheap flights from Washington to Nantucket: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Nantucket

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Nantucket in 2025. You can also book with separate airlines for your outbound and return journeys, from $98 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Nantucket flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Nantucket airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK) cost?
Discover the latest flight deals from IAD to ACK by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAD to ACK?
The cheapest flights from IAD to ACK are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from IAD to ACK?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from IAD to ACK. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK)?
There aren't any daily nonstop flights from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from IAD to ACK?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK)?
Opt for a flight from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK) last-minute?
Holding off until just before your trip to book your flight from IAD to ACK generally means paying more. While you may find some last-minute offers, they're not always guaranteed. Keep your travel schedule open for a better chance of getting a bargain.
Is it cheaper to book an IAD to ACK flight and hotel package?
You can save money by securing an IAD to ACK flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've chosen your preferred flights and accommodations, consider other add-ons like activities, car rentals and tours.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Nantucket Memorial Airport (ACK)?
In most instances, you can modify or cancel your IAD to ACK flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need further details, visit our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.