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Islip

$133+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Mar 12 — Mar 191
Thu 3/12
Thu 3/19
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 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:00 pm
JFK
-
ISP
1 stop20h 13m
Frontier
Fri 5/84:07 pm
ISP
-
JFK
1 stop19h 43m
Frontier
Deal found 2/8$250
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/38:25 pm
LGA
-
ISP
1 stop12h 48m
Multiple Airlines
Fri 5/84:07 pm
ISP
-
LGA
1 stop21h 53m
Multiple Airlines
Deal found 2/8$266
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:29 pm
EWR
-
ISP
2 stops16h 26m
Multiple Airlines
Fri 5/84:07 pm
ISP
-
EWR
1 stop16h 48m
Multiple Airlines
Deal found 2/8$272
This Kiwi.com deal was found by Cheapflights users on 2/6. 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 3/710:43 pm
EWR
-
ISP
2 stops19h 03m
Multiple Airlines
Sat 3/1411:50 am
ISP
-
EWR
1 stop8h 10m
Multiple Airlines
Deal found 2/6$290
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:22 pm
PHL
-
ISP
1 stop29h 20m
Multiple Airlines
Fri 2/273:34 pm
ISP
-
PHL
1 stop7h 42m
Multiple Airlines
Deal found 2/8$299
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/81:00 pm
JFK
-
ISP
1 stop9h 28m
Frontier
Sun 4/128:36 pm
ISP
-
JFK
2 stops37h 53m
Frontier
Deal found 2/8$320
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 4/175:30 am
PHL
-
ISP
1 stop8h 01m
Multiple Airlines
Sun 4/193:50 pm
ISP
-
PHL
2 stops19h 12m
Multiple Airlines
Deal found 2/7$321
This Southwest deal was found by Cheapflights users on 2/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am
DCA
-
ISP
1 stop8h 55m
Southwest
Tue 9/1510:30 am
ISP
-
DCA
1 stop11h 30m
Southwest
Deal found 2/8$332
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/610:30 pm
EWR
-
ISP
2 stops12h 40m
Multiple Airlines
Sun 3/85:08 pm
ISP
-
EWR
1 stop15h 52m
Multiple Airlines
Deal found 2/8$333
This Southwest deal was found by Cheapflights users on 2/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:00 am
DCA
-
ISP
1 stop7h 40m
Southwest
Tue 3/176:10 am
ISP
-
DCA
1 stop5h 50m
Southwest
Deal found 2/8$337
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 2/229:07 pm
IAD
-
ISP
1 stop17h 58m
Frontier
Thu 2/263:34 pm
ISP
-
IAD
1 stop15h 46m
Frontier
Deal found 2/7$360
This Southwest deal was found by Cheapflights users on 2/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/251:05 pm
DCA
-
ISP
1 stop8h 20m
Southwest
Sun 4/265:15 am
ISP
-
DCA
1 stop6h 45m
Southwest
Deal found 2/8$362

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 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$178
(Kiwi.com)

One-way from

$133
(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 10, 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

Sun 5/3

6:00 am-2:55 pm

2 stops32h 55m

Islip Long Island

Fri 5/8

4:07 pm-11:50 am

1 stop19h 43m

$260

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Sun 5/3

8:25 pm-9:13 am

1 stop12h 48m

Islip Long Island

Fri 5/8

4:07 pm-2:00 pm

1 stop21h 53m

$266

NewarkIslip

EWR - ISP

EWRISP

Newark

Sun 5/3

10:29 pm-2:55 pm

2 stops16h 26m

Islip Long Island

Fri 5/8

4:07 pm-8:55 am

1 stop16h 48m

$272

NewarkIslip

EWR - ISP

EWRISP

Newark

Sat 3/7

10:43 pm-5:46 pm

2 stops19h 03m

Islip Long Island

Sat 3/14

11:50 am-8:00 pm

1 stop8h 10m

$290

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 2/23

6:22 pm-11:42 pm

1 stop29h 20m

Islip Long Island

Fri 2/27

3:34 pm-11:16 pm

1 stop7h 42m

$299

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Wed 4/8

1:00 pm-10:28 pm

1 stop9h 28m

Islip Long Island

Sun 4/12

8:36 pm-10:29 am

2 stops37h 53m

$320

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 4/17

5:30 am-1:31 pm

1 stop8h 01m

Islip Long Island

Sun 4/19

3:50 pm-11:41 am

1 stop19h 51m

$332

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 3/10

6:00 am-1:40 pm

1 stop7h 40m

Islip Long Island

Tue 3/17

6:10 am-12:00 pm

1 stop5h 50m

$337

NewarkIslip

EWR - ISP

EWRISP

Newark

Fri 3/6

2:00 pm-8:05 pm

1 stop6h 05m

Islip Long Island

Sun 3/8

5:08 pm-9:00 am

1 stop15h 52m

$344

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 2/22

9:07 pm-3:05 pm

1 stop17h 58m

Islip Long Island

Thu 2/26

3:34 pm-7:20 am

1 stop15h 46m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 48 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, Southwest, and JetBlue can get you from Pennsylvania to Islip, New York in just under 7h 40m. Your travel time can differ by up to 25h 15m. 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 Newark - 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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

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