$592 Cheap Flights from Harrisburg (MDT) to Islip (ISP)

View $592 flight on Mon, May 25, 2026Opens in a new window

Popular airlines from Harrisburg Intl. Airport (MDT) to MacArthur Airport (ISP)

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Cheap Flights from Harrisburg to Islip (MDT-ISP)

Prices were available within the past 7 days and start at $592 for one-way flights and $945 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$945 Roundtrip, found 4 days ago
$945
Roundtrip
found 4 days ago
Select United flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $945 found 4 days ago
United
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,005 Roundtrip, found 4 days ago
$1,005
Roundtrip
found 4 days ago
Select United flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,005 found 4 days ago
American Airlines
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,015 Roundtrip, found 4 days ago
$1,015
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,015 found 4 days ago
United
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,017 Roundtrip, found 4 days ago
$1,017
Roundtrip
found 4 days ago
Select United flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,017 found 4 days ago
American Airlines
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,033 Roundtrip, found 4 days ago
$1,033
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,033 found 4 days ago
American Airlines
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,052 Roundtrip, found 4 days ago
$1,052
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,052 found 4 days ago
American Airlines
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,070 Roundtrip, found 4 days ago
$1,070
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,070 found 4 days ago
Delta
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,075 Roundtrip, found 4 days ago
$1,075
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,075 found 4 days ago
United
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,077 Roundtrip, found 4 days ago
$1,077
Roundtrip
found 4 days ago
Select United flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,077 found 4 days ago
American Airlines
Tue, Apr 28 - Tue, May 5
MDT
Harrisburg
ISP
Islip
$1,081 Roundtrip, found 4 days ago
$1,081
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Apr 28 from Harrisburg to Islip, returning Tue, May 5, priced at $1,081 found 4 days ago

Frequently asked questions

How much does a flight from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) cost?
You can find cheap one-way flights from $592 and cheap return flights from $945 MDT to ISP 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 MDT to ISP ticket fares go up or down.
What is the cheapest month to fly from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
The cheapest month to fly from MDT to ISP is April 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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
Enter MDT to ISP and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
American Airlines, United and Delta are just some of the carriers that fly from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
To find a cheap flight from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur), 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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from MDT to ISP. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
Flights from MDT to ISP with one stop typically take around 4 hours 20 minutes, covering approximately 197 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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
Select the "Business class" and "First class" filters when looking for MDT to ISP 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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) flight with Expedia?
It's easy to earn miles on a Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) 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.
Is it cheaper to buy a plane ticket from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) at the last minute?
Typically, booking a last minute flight from Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) 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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) flight and hotel package?
Securing a Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) flight and hotel package 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 Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur)?
If you booked your Harrisburg, PA (MDT-Harrisburg Intl.) to Islip, NY (ISP-MacArthur) 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.

Travel information

Origin airport
Harrisburg Intl.
Destination airport
MacArthur
Roundtrip price
$944
Distance
196 mi

*Flight schedules are subject to change.

*Available to One Key members.

 

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