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Islip

$135+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
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Cheap 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 February 14, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:29 pm
JFK
-
ISP
1 stop22h 10m
Frontier
Wed 3/49:33 am
ISP
-
JFK
2 stops15h 30m
Frontier
Deal found 2/11$176
This Kiwi.com deal was found by Cheapflights users on 2/12. 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.
Fri 2/273:30 pm
EWR
-
ISP
1 stop19h 40m
Multiple Airlines
Mon 3/23:34 pm
ISP
-
EWR
1 stop17h 26m
Multiple Airlines
Deal found 2/12$185
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/144:55 pm
LGA
-
ISP
1 stop20h 33m
Multiple Airlines
Mon 5/184:07 pm
ISP
-
LGA
1 stop23h 53m
Multiple Airlines
Deal found 2/11$206
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/112:00 pm
EWR
-
ISP
2 stops28h 46m
Multiple Airlines
Wed 3/1811:50 am
ISP
-
EWR
1 stop8h 10m
Multiple Airlines
Deal found 2/11$209
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:46 pm
PHL
-
ISP
1 stop11h 52m
Multiple Airlines
Mon 3/23:34 pm
ISP
-
PHL
1 stop23h 10m
Multiple Airlines
Deal found 2/11$225
This Kiwi.com deal was found by Cheapflights users on 2/12. 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.
Fri 2/274:59 pm
LGA
-
ISP
1 stop18h 11m
Multiple Airlines
Mon 3/22:31 pm
ISP
-
LGA
1 stop5h 18m
Multiple Airlines
Deal found 2/12$226
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/268:39 pm
PHL
-
ISP
2 stops18h 00m
Frontier
Mon 3/23:34 pm
ISP
-
PHL
1 stop23h 10m
Frontier
Deal found 2/11$242
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/178:25 pm
LGA
-
ISP
1 stop12h 48m
Multiple Airlines
Wed 5/206:09 pm
ISP
-
LGA
1 stop5h 35m
Multiple Airlines
Deal found 2/10$242
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:25 pm
LGA
-
ISP
1 stop12h 48m
Frontier
Mon 5/184:07 pm
ISP
-
LGA
2 stops25h 23m
Frontier
Deal found 2/11$244
This Kiwi.com deal was found by Cheapflights users on 2/13. 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.
Thu 4/236:16 pm
PHL
-
ISP
2 stops20h 39m
Multiple Airlines
Sat 4/2511:50 am
ISP
-
PHL
1 stop4h 46m
Multiple Airlines
Deal found 2/13$246
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 5/1412:46 pm
PHL
-
ISP
1 stop20h 27m
Frontier
Sun 5/174:07 pm
ISP
-
PHL
1 stop15h 34m
Frontier
Deal found 2/10$256
This Kiwi.com deal was found by Cheapflights users on 2/13. 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.
Fri 2/276:59 am
EWR
-
ISP
1 stop17h 45m
Multiple Airlines
Sun 3/17:26 pm
ISP
-
EWR
2 stops23h 33m
Multiple Airlines
Deal found 2/13$265

Find flight deals from Pennsylvania to Islip

Keep the following information in mind while searching for Pennsylvania to Islip flight deals. Data was last updated February 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$173
(Trip.com)

One-way from

$135
(Kiwi.com)

Popular in

February

Cheapest in

August

Average price

$493
Provider with most accurate pricing for Philadelphia-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-New York (NYC) flights.
Search Deals
From Pennsylvania to Islip Long Island
Search Deals
One-way flight from Pennsylvania to Islip Long Island
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 14, 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

Wed 2/25

4:29 pm-2:39 pm

1 stop22h 10m

Islip Long Island

Wed 3/4

9:33 am-1:03 am

2 stops15h 30m

$176

NewarkIslip

EWR - ISP

EWRISP

Newark

Fri 2/27

3:30 pm-11:10 am

1 stop19h 40m

Islip Long Island

Mon 3/2

3:34 pm-9:00 am

1 stop17h 26m

$185

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Thu 5/14

4:55 pm-1:28 pm

1 stop20h 33m

Islip Long Island

Mon 5/18

4:07 pm-4:00 pm

1 stop23h 53m

$206

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 2/26

7:46 pm-7:38 am

1 stop11h 52m

Islip Long Island

Mon 3/2

3:34 pm-2:44 pm

1 stop23h 10m

$225

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 2/26

8:39 pm-2:39 pm

2 stops18h 00m

Islip Long Island

Mon 3/2

3:34 pm-2:44 pm

1 stop23h 10m

$242

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Thu 5/14

8:25 pm-9:13 am

1 stop12h 48m

Islip Long Island

Mon 5/18

4:07 pm-5:30 pm

2 stops25h 23m

$244

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 4/23

6:16 pm-1:31 pm

1 stop19h 15m

Islip Long Island

Sat 4/25

11:50 am-4:36 pm

1 stop4h 46m

$247

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 5/14

12:46 pm-9:13 am

1 stop20h 27m

Islip Long Island

Sun 5/17

4:07 pm-7:41 am

1 stop15h 34m

$256

NewarkIslip

EWR - ISP

EWRISP

Newark

Fri 2/27

6:59 am-12:44 am

1 stop17h 45m

Islip Long Island

Sun 3/1

7:26 pm-6:59 pm

2 stops23h 33m

$265

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 2/28

10:29 am-7:48 am

2 stops21h 19m

Islip Long Island

Wed 3/4

9:33 am-9:25 am

1 stop23h 52m

$266

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

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 $42). Flying from Pennsylvania to Islip, New York in October is currently the most expensive (average of $66). 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, JetBlue, and Southwest can get you from Pennsylvania to Islip, New York in just under 6h 05m. Your travel time can differ by up to 16h 05m. The distance from Pennsylvania to Islip, New York is about 248 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 Washington, D.C. Dulles Intl - Islip Long Island or New York John F Kennedy 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 $42). Flying from Pennsylvania to Islip, New York in October is currently the most expensive (average of $66). 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 February 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

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