$486 Cheap Flights from Islip (ISP) to Nantucket (ACK)

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Islip to Nantucket Flights

The cheapest times to fly from Islip 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 Islip to Nantucket are during the month of September. You can find some of the cheapest flights from Islip to Nantucket with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Islip to Nantucket

Sunday is one of the best days to book for cheap flights from Islip 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 Islip 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 Islip to Nantucket in 2026. You can also book with separate airlines for your outbound and return journeys, from $486 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 Islip 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 Islip 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 Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) cost?

You can find cheap one-way flights from $486 and cheap return flights $1,096 ISP to ACK with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when ISP to ACK ticket fares go up or down.

What is the cheapest month to fly from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

The cheapest month to fly from ISP to ACK is September when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.

Which airlines fly direct from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

Enter ISP to ACK and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

How do I find cheap flights from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

To find a cheap flight from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

What is the best time to fly from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

What is the earliest flight from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

The earliest flight from Islip, NY (ISP) to Nantucket, MA (ACK) typically departs at around 7:30 AM, operated by 9K. This seasonal service is active in August, making it a great option for summer travelers looking to enjoy Nantucket early in the day. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

How long does it take to fly from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

Flying from ISP to ACK with a connection usually takes about 3 hours 20 minutes, traveling roughly 161 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.

Can you fly business or first class from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

Select the "Business class" and "First class" filters when looking for ISP to ACK flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.

How do I earn miles on a Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) flight with Expedia?

It's easy to earn miles on a Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

What airports do you fly into for Nantucket from MacArthur (ISP)?

From MacArthur (ISP), you can fly into Nantucket Memorial (ACK) to reach Nantucket. Some flights may connect through major hubs like Logan Intl. (BOS) before reaching Nantucket. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Is it cheaper to buy a plane ticket from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) at the last minute?

Typically, booking a last minute flight from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Is it cheaper to book a Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) flight and hotel package?

Securing a Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) Nantucket Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

Can I cancel or change the date of my flight from Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial)?

If you booked your Islip, NY (ISP-MacArthur) to Nantucket, MA (ACK-Nantucket Memorial) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.