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Islip

$66+ Cheap flights from Pennsylvania to Islip, NY (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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Feb 15 — Feb 221
Sun 2/15
Sun 2/22
1 adult, Economy
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Cheap flight deals from Pennsylvania to Islip

Keep the following information in mind while searching for Pennsylvania to Islip flight deals. Data was last updated January 16, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$162
(Kiwi.com)

One-way from

$66
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$227
Provider with most accurate pricing for Philadelphia-New York (NYC) flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-New York (NYC) flights.
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From Pennsylvania to Islip Long Island
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One-way flight from Pennsylvania to Islip Long Island
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Highest demand for flights based on searches. 11% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Pennsylvania to Islip

Cheapest flights from Pennsylvania to Islip
Explore the most affordable flight options available from Pennsylvania to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/14. 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.
Sat 1/314:25 pm
JFK
-
ISP
1 stop16h 15m
Frontier
Sun 3/15:30 am
ISP
-
JFK
2 stops19h 33m
Frontier
Deal found 1/14$162
This Frontier deal was found by Cheapflights users on 1/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/19:58 pm
IAD
-
ISP
1 stop10h 43m
Frontier
Mon 4/139:41 am
ISP
-
IAD
1 stop11h 32m
Frontier
Deal found 1/14$175
This Kiwi.com deal was found by Cheapflights users on 1/13. 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 2/86:57 pm
PHL
-
ISP
1 stop18h 34m
Multiple Airlines
Sat 2/215:07 pm
ISP
-
PHL
1 stop15h 05m
Multiple Airlines
Deal found 1/13$182
This Frontier deal was found by Cheapflights users on 1/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/19:58 pm
IAD
-
ISP
1 stop10h 43m
Frontier
Sat 4/118:19 pm
ISP
-
IAD
1 stop11h 59m
Frontier
Deal found 1/14$196
This Kiwi.com deal was found by Cheapflights users on 1/15. 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.
Thu 2/56:30 am
LGA
-
ISP
1 stop12h 18m
Multiple Airlines
Sun 2/87:53 pm
ISP
-
LGA
2 stops25h 36m
Multiple Airlines
Deal found 1/15$207
This Kiwi.com deal was found by Cheapflights users on 1/15. 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.
Sat 2/147:46 pm
PHL
-
ISP
1 stop12h 02m
Multiple Airlines
Sat 2/218:23 pm
ISP
-
PHL
2 stops38h 55m
Multiple Airlines
Deal found 1/15$207
This Kiwi.com deal was found by Cheapflights users on 1/15. 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.
Thu 2/511:05 am
EWR
-
ISP
1 stop7h 43m
Multiple Airlines
Sun 2/87:26 pm
ISP
-
EWR
2 stops23h 33m
Multiple Airlines
Deal found 1/15$208
This Frontier deal was found by Cheapflights users on 1/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/19:58 pm
IAD
-
ISP
1 stop10h 43m
Frontier
Sun 4/128:19 pm
ISP
-
IAD
1 stop11h 59m
Frontier
Deal found 1/14$210
This Frontier deal was found by Cheapflights users on 1/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/49:58 pm
IAD
-
ISP
1 stop10h 43m
Frontier
Mon 4/139:41 am
ISP
-
IAD
1 stop11h 32m
Frontier
Deal found 1/14$229
This Frontier deal was found by Cheapflights users on 1/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/29:58 pm
IAD
-
ISP
1 stop10h 43m
Frontier
Sat 4/118:19 pm
ISP
-
IAD
1 stop11h 59m
Frontier
Deal found 1/14$231
This Kiwi.com deal was found by Cheapflights users on 1/14. 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.
Mon 1/262:00 pm
EWR
-
ISP
1 stop6h 05m
Multiple Airlines
Sun 2/17:26 pm
ISP
-
EWR
2 stops23h 33m
Multiple Airlines
Deal found 1/14$232
This Frontier deal was found by Cheapflights users on 1/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/39:19 am
IAD
-
ISP
1 stop9h 52m
Frontier
Mon 4/139:41 am
ISP
-
IAD
1 stop11h 32m
Frontier
Deal found 1/14$240

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania 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 January 16, 2026.
Use the filters below to find and compare flights from Pennsylvania to Islip that are best for you.

Fly from

Pennsylvania

Fly to

Islip

Route

Depart

Return

Price

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Sat 1/31

4:25 pm-8:40 am

1 stop16h 15m

Islip Long Island

Sun 3/1

5:30 am-1:03 am

2 stops19h 33m

$162

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 4/1

9:58 pm-8:41 am

1 stop10h 43m

Islip Long Island

Mon 4/13

9:41 am-9:13 pm

1 stop11h 32m

$175

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 2/8

6:57 pm-1:31 pm

1 stop18h 34m

Islip Long Island

Sat 2/21

5:07 pm-8:12 am

1 stop15h 05m

$182

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 2/14

7:46 pm-7:48 am

1 stop12h 02m

Islip Long Island

Sat 2/21

11:41 am-11:16 pm

1 stop11h 35m

$182

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 4/1

9:58 pm-8:41 am

1 stop10h 43m

Islip Long Island

Sat 4/11

8:19 pm-8:18 am

1 stop11h 59m

$196

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Thu 2/5

6:30 am-6:48 pm

1 stop12h 18m

Islip Long Island

Sun 2/8

7:53 pm-9:29 pm

2 stops25h 36m

$207

NewarkIslip

EWR - ISP

EWRISP

Newark

Thu 2/5

11:05 am-6:48 pm

1 stop7h 43m

Islip Long Island

Sun 2/8

7:26 pm-6:59 pm

2 stops23h 33m

$208

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 4/2

9:58 pm-8:41 am

1 stop10h 43m

Islip Long Island

Mon 4/13

9:41 am-9:13 pm

1 stop11h 32m

$210

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Wed 4/1

9:58 pm-8:41 am

1 stop10h 43m

Islip Long Island

Sun 4/12

8:19 pm-8:18 am

1 stop11h 59m

$210

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 4/4

9:58 pm-8:41 am

1 stop10h 43m

Islip Long Island

Mon 4/13

9:41 am-9:13 pm

1 stop11h 32m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Pennsylvania 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.

Cheapflights Insights

Everything you need to know about your flight from Pennsylvania to Islip

What is the cheapest month to book a flight from Pennsylvania to Islip, New York?

Currently, April is the cheapest month in which you can book a flight from Pennsylvania to Islip, New York (average of $41). Flying from Pennsylvania to Islip, New York in October is currently the most expensive (average of $65). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

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

  • What airport do you fly into for flights to Islip from Pennsylvania?

    If you book a flight to Islip from Pennsylvania, you will be flying to Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

  • How long is the flight from Pennsylvania to Islip, New York?

    Frontier and Southwest can get you from Pennsylvania to Islip, New York in just under 8h 45m. Your travel time can differ by up to 7h 30m. The distance from Pennsylvania to Islip, New York is about 375 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Pennsylvania to Islip, New York?

    The most popular route from Pennsylvania to Islip, New York is Washington, D.C. Reagan-National - Islip Long Island. You may also consider New York John F Kennedy Intl - Islip Long Island or Washington, D.C. Dulles Intl - Islip Long Island.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Pennsylvania 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.

  • What is the cheapest month to book a flight from Pennsylvania to Islip, New York?

    Currently, April is the cheapest month in which you can book a flight from Pennsylvania to Islip, New York (average of $41). Flying from Pennsylvania to Islip, New York in October is currently the most expensive (average of $65). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

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

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Alternative routes for Pennsylvania to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Pennsylvania to Islip

Discover the top airline that operate flights from Pennsylvania to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

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