$108 Cheap Flights from Nantucket (ACK) to Washington (IAD)

View $108 flight on Wed, Aug 27, 2025Opens in a new window

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

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Cheap Flights from Nantucket to Washington (ACK-IAD)

Prices were available within the past 7 days and start at $108 for one-way flights and $211 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Aug 28 - Sun, Aug 31
ACK
Nantucket
IAD
Washington
$211 Roundtrip, found 9 hours ago
$211
Roundtrip
found 9 hours ago
Select Delta flight, departing Thu, Aug 28 from Nantucket to Washington, returning Sun, Aug 31, priced at $211 found 9 hours ago
United
Thu, Aug 28 - Sun, Aug 31
ACK
Nantucket
IAD
Washington
$212 Roundtrip, found 9 hours ago
$212
Roundtrip
found 9 hours ago
Select United flight, departing Thu, Aug 28 from Nantucket to Washington, returning Sun, Aug 31, priced at $212 found 9 hours ago
Delta
Thu, Aug 14 - Tue, Aug 19
ACK
Nantucket
IAD
Washington
$227 Roundtrip, found 5 days ago
$227
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Aug 14 from Nantucket to Washington, returning Tue, Aug 19, priced at $227 found 5 days ago
American Airlines
Thu, Aug 28 - Sun, Aug 31
ACK
Nantucket
IAD
Washington
$236 Roundtrip, found 9 hours ago
$236
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Thu, Aug 28 from Nantucket to Washington, returning Sun, Aug 31, priced at $236 found 9 hours ago
Delta
Thu, Aug 28 - Sun, Aug 31
ACK
Nantucket
IAD
Washington
$241 Roundtrip, found 9 hours ago
$241
Roundtrip
found 9 hours ago
Select Delta flight, departing Thu, Aug 28 from Nantucket to Washington, returning Sun, Aug 31, priced at $241 found 9 hours ago
Delta
Thu, Aug 14 - Sat, Aug 23
ACK
Nantucket
IAD
Washington
$246 Roundtrip, found 5 days ago
$246
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Aug 14 from Nantucket to Washington, returning Sat, Aug 23, priced at $246 found 5 days ago
Delta
Thu, Aug 28 - Sat, Aug 30
ACK
Nantucket
IAD
Washington
$247 Roundtrip, found 9 hours ago
$247
Roundtrip
found 9 hours ago
Select Delta flight, departing Thu, Aug 28 from Nantucket to Washington, returning Sat, Aug 30, priced at $247 found 9 hours ago
Delta
Tue, Aug 26 - Tue, Sep 2
ACK
Nantucket
IAD
Washington
$251 Roundtrip, found 9 hours ago
$251
Roundtrip
found 9 hours ago
Select Delta flight, departing Tue, Aug 26 from Nantucket to Washington, returning Tue, Sep 2, priced at $251 found 9 hours ago
Delta
Fri, Aug 29 - Sat, Aug 30
ACK
Nantucket
IAD
Washington
$252 Roundtrip, found 9 hours ago
$252
Roundtrip
found 9 hours ago
Select Delta flight, departing Fri, Aug 29 from Nantucket to Washington, returning Sat, Aug 30, priced at $252 found 9 hours ago
Delta
Thu, Aug 14 - Mon, Aug 18
ACK
Nantucket
IAD
Washington
$255 Roundtrip, found 5 days ago
$255
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Aug 14 from Nantucket to Washington, returning Mon, Aug 18, priced at $255 found 5 days ago

Alternative airports near Washington

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

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $198
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $198
Flights from Nantucket (ACK) to Washington (IAD)
Origin airport
Nantucket Memorial
Destination airport
Washington Dulles Intl.
Airlines serving
Delta, United
Roundtrip price
$210
Distance
421 mi

Nantucket to Washington Flights

The cheapest times to fly from Nantucket to Washington

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 Nantucket to Washington are during the month of August. You can find some of the cheapest flights from Nantucket to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Nantucket to Washington

Sunday is one of the best days to book for cheap flights from Nantucket to Washington: 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 Nantucket to Washington

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 Nantucket to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $108 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 Nantucket to Washington 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 Nantucket to Washington 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 Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD) cost?
Grab a cheap one-way flight from $108 or cheap return flight from $211 from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD)?
August is the cheapest month to fly from ACK to IAD. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD)?
Use the filter tool on Expedia to compare airlines and find the most affordable carrier that'll fly you from ACK to IAD. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD)?
Nonstop flights from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ACK to IAD?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, carrier 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 Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD)?
Choose a flight from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD) that takes off before 3 PM to reduce the risk of cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from ACK to IAD are typically more expensive. To secure the best rates, start searching for flights ahead of time. That being said, if you're flexible with your travel plans, it's possible to score a cheap ticket right before your trip.
Is it cheaper to book an ACK to IAD flight and hotel package?
You can save money by securing an ACK to IAD flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your preferred flights and accommodations, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Nantucket Memorial Airport (ACK) to Washington Dulles Intl. Airport (IAD)?
Typically, it's possible to cancel or reschedule your ACK to IAD flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.