$123 Cheap Flights from Nantucket (ACK) to Washington (IAD)

View $123 flight on Tue, Jun 9, 2026Opens in a new window

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

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Nantucket to Washington (ACK-IAD)

Prices were available within the past 7 days and start at $123 for one-way flights and $854 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cape Air
Fri, Dec 5 - Sun, Dec 7
ACK
Nantucket
IAD
Washington
$854 Roundtrip, found 6 days ago
$854
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Dec 5 from Nantucket to Washington, returning Sun, Dec 7, priced at $854 found 6 days ago
Cape Air
Fri, Dec 5 - Sun, Dec 7
ACK
Nantucket
IAD
Washington
$859 Roundtrip, found 6 days ago
$859
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Dec 5 from Nantucket to Washington, returning Sun, Dec 7, priced at $859 found 6 days ago
Cape Air
Fri, Dec 5 - Sun, Dec 7
ACK
Nantucket
IAD
Washington
$874 Roundtrip, found 6 days ago
$874
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Dec 5 from Nantucket to Washington, returning Sun, Dec 7, priced at $874 found 6 days ago
Cape Air
Fri, Dec 5 - Sun, Dec 7
ACK
Nantucket
IAD
Washington
$879 Roundtrip, found 6 days ago
$879
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Dec 5 from Nantucket to Washington, returning Sun, Dec 7, priced at $879 found 6 days ago
Cape Air
Fri, Dec 5 - Sun, Dec 7
ACK
Nantucket
IAD
Washington
$894 Roundtrip, found 6 days ago
$894
Roundtrip
found 6 days ago
Select Cape Air flight, departing Fri, Dec 5 from Nantucket to Washington, returning Sun, Dec 7, priced at $894 found 6 days ago
Cape Air
Tue, Dec 23 - Fri, Jan 2
ACK
Nantucket
IAD
Washington
$895 Roundtrip, found 3 days ago
$895
Roundtrip
found 3 days ago
Select Cape Air flight, departing Tue, Dec 23 from Nantucket to Washington, returning Fri, Jan 2, priced at $895 found 3 days ago
Cape Air
Tue, Dec 23 - Fri, Jan 2
ACK
Nantucket
IAD
Washington
$900 Roundtrip, found 3 days ago
$900
Roundtrip
found 3 days ago
Select Cape Air flight, departing Tue, Dec 23 from Nantucket to Washington, returning Fri, Jan 2, priced at $900 found 3 days ago
United
Sat, Jul 4 - Sat, Jul 11
ACK
Nantucket
IAD
Washington
$910 Roundtrip, found 3 days ago
$910
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jul 4 from Nantucket to Washington, returning Sat, Jul 11, priced at $910 found 3 days ago
Cape Air
Tue, Dec 23 - Fri, Jan 2
ACK
Nantucket
IAD
Washington
$915 Roundtrip, found 3 days ago
$915
Roundtrip
found 3 days ago
Select Cape Air flight, departing Tue, Dec 23 from Nantucket to Washington, returning Fri, Jan 2, priced at $915 found 3 days ago
Cape Air
Tue, Dec 23 - Fri, Jan 2
ACK
Nantucket
IAD
Washington
$920 Roundtrip, found 3 days ago
$920
Roundtrip
found 3 days ago
Select Cape Air flight, departing Tue, Dec 23 from Nantucket to Washington, returning Fri, Jan 2, priced at $920 found 3 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 $547
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $547

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 $123 or cheap return flight from $854 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)?
December 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.

Travel information

Origin airport
Nantucket Memorial
Destination airport
Washington Dulles Intl.
Roundtrip price
$854
Distance
421 mi

Book with confidence

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 December. 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 $123 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.

 

Nantucket to Washington Flights

Explore a world of travel with Expedia

*Available to One Key members.