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Islip

$303+ Cheap flights from Harrisburg to Islip, NY (MDT - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
MDT — ISP
Aug 10 — Aug 171
Mon 8/10
Mon 8/17
1 adult, Economy
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Cheap flight deals from Harrisburg to Islip

Cheapest flights from Harrisburg to Islip
Explore the most affordable flight options available from Harrisburg to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 11, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/128:58 pm
MDT
-
ISP
1 stop12h 55m
Multiple Airlines
Tue 7/145:27 pm
ISP
-
MDT
2 stops19h 53m
Multiple Airlines
Deal found 7/9$955
This United deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/255:55 pm
MDT
-
ISP
2 stops27h 04m
Multiple Airlines
Tue 7/282:16 pm
ISP
-
MDT
2 stops23h 34m
Multiple Airlines
Deal found 7/11$1,075
This United deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:55 pm
MDT
-
ISP
2 stops17h 01m
Multiple Airlines
Sat 7/187:05 am
ISP
-
MDT
2 stops11h 39m
Multiple Airlines
Deal found 7/9$1,195
This United deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:55 pm
MDT
-
ISP
2 stops27h 04m
Multiple Airlines
Mon 7/2710:05 am
ISP
-
MDT
2 stops30h 51m
Multiple Airlines
Deal found 7/8$1,204
This United deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:59 pm
MDT
-
ISP
2 stops14h 31m
Multiple Airlines
Sun 7/265:34 pm
ISP
-
MDT
2 stops16h 06m
Multiple Airlines
Deal found 7/9$1,213

Find flight deals from Harrisburg to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Harrisburg (MDT) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,204
(United)

One-way from

$303
(Kiwi.com)
Provider with most accurate pricing for Harrisburg-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Harrisburg-Islip Long Island flights.
Search Deals
From Harrisburg to Islip Long Island
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One-way flight from Harrisburg to Islip Long Island
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Harrisburg to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 11, 2026.
Use the filters below to find and compare flights from Harrisburg to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HarrisburgIslip

MDT - ISP

MDTISP

Harrisburg

Sat 7/25

5:55 pm-8:59 pm

2 stops27h 04m

Islip Long Island

Tue 7/28

2:16 pm-1:50 pm

2 stops23h 34m

$1,075

HarrisburgIslip

MDT - ISP

MDTISP

Harrisburg

Thu 7/23

5:55 pm-8:59 pm

2 stops27h 04m

Islip Long Island

Mon 7/27

10:05 am-4:56 pm

2 stops30h 51m

$1,204
Quickest round-trip

HarrisburgIslip

MDT - ISP

MDTISP

Harrisburg

Fri 7/24

7:59 pm-10:30 am

2 stops14h 31m

Islip Long Island

Sun 7/26

5:34 pm-9:40 am

2 stops16h 06m

$1,213
Cheapest one-way
Quickest one-way

HarrisburgIslip

MDT - ISP

MDTISP

Harrisburg

Wed 7/22

2:10 pm-7:09 pm

2 stops28h 59m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Sorted by cheapest first

Compare providers for flights from Harrisburg to Islip

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Harrisburg to Islip in July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Harrisburg-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harrisburg-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harrisburg-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harrisburg-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harrisburg-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Harrisburg to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Harrisburg with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Harrisburg to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Harrisburg to Islip that include hotel bookings?

    Yes. In addition to deals on Harrisburg to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Harrisburg to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harrisburg to Islip.

  • Can I find deals for business class flights from Harrisburg to Islip?

    Yes. Cheapflights offers flight deals from Harrisburg to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead

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