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Islip

$70+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
Tue 2/245:45 pm
PIT
-
ISP
1 stop14h 55m
Multiple Airlines
Sun 3/15:51 pm
ISP
-
PIT
1 stop19h 33m
Multiple Airlines
Deal found 1/26$200
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 3/65:30 am
PHL
-
ISP
1 stop8h 01m
Multiple Airlines
Mon 3/91:22 pm
ISP
-
PHL
1 stop29h 29m
Multiple Airlines
Deal found 1/27$231
This Southwest deal was found by Cheapflights users on 1/28. 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.
Thu 2/1910:40 am
PIT
-
ISP
1 stop5h 45m
Southwest
Sun 2/221:10 pm
ISP
-
PIT
1 stop5h 20m
Southwest
Deal found 1/28$261
This Southwest deal was found by Cheapflights users on 1/27. 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.
Thu 4/162:45 pm
PIT
-
ISP
2 stops8h 45m
Southwest
Sun 4/195:25 pm
ISP
-
PIT
1 stop6h 20m
Southwest
Deal found 1/27$277
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Tue 2/106:54 pm
PHL
-
ISP
1 stop16h 16m
Multiple Airlines
Thu 2/123:34 pm
ISP
-
PHL
1 stop7h 42m
Multiple Airlines
Deal found 1/27$303
This Southwest deal was found by Cheapflights users on 1/27. 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 5/266:40 am
PIT
-
ISP
1 stop5h 15m
Southwest
Fri 5/294:30 pm
ISP
-
PIT
1 stop3h 30m
Southwest
Deal found 1/27$306
This Southwest deal was found by Cheapflights users on 1/28. 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.
Wed 8/196:10 am
PIT
-
ISP
1 stop6h 00m
Southwest
Sun 8/236:20 am
ISP
-
PIT
1 stop6h 00m
Southwest
Deal found 1/28$307
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:55 pm
DCA
-
ISP
1 stop14h 00m
JetBlue
Tue 3/249:45 am
ISP
-
DCA
1 stop8h 14m
JetBlue
Deal found 1/28$345
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 1/294:19 pm
EWR
-
ISP
1 stop21h 02m
Multiple Airlines
Thu 2/57:26 pm
ISP
-
EWR
2 stops23h 33m
Multiple Airlines
Deal found 1/28$348
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 4/248:00 am
LGA
-
ISP
2 stops27h 10m
Multiple Airlines
Thu 4/304:07 pm
ISP
-
LGA
1 stop23h 53m
Multiple Airlines
Deal found 1/26$366
This Southwest deal was found by Cheapflights users on 1/28. 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.
Mon 3/161:00 pm
DCA
-
ISP
1 stop9h 40m
Southwest
Tue 3/246:10 am
ISP
-
DCA
1 stop5h 50m
Southwest
Deal found 1/28$383
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/69:35 am
IAD
-
ISP
1 stop11h 12m
Frontier
Sun 2/158:01 pm
ISP
-
IAD
1 stop11h 19m
Frontier
Deal found 1/26$442

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$200
(Kiwi.com)

One-way from

$70
(Trip.com)

Popular in

November

Cheapest in

August

Average price

$227
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
Highest demand for flights based on searches. 11% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 29, 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

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Tue 2/24

5:45 pm-8:40 am

1 stop14h 55m

Islip Long Island

Sun 3/1

5:51 pm-1:24 pm

1 stop19h 33m

$200

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 3/6

5:30 am-1:31 pm

1 stop8h 01m

Islip Long Island

Mon 3/9

1:22 pm-6:51 pm

1 stop29h 29m

$231

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Thu 2/19

10:40 am-4:25 pm

1 stop5h 45m

Islip Long Island

Sun 2/22

1:10 pm-6:30 pm

1 stop5h 20m

$261

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Thu 4/16

2:45 pm-11:30 pm

2 stops8h 45m

Islip Long Island

Sun 4/19

5:25 pm-11:45 pm

1 stop6h 20m

$277

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 2/10

6:54 pm-11:10 am

1 stop16h 16m

Islip Long Island

Thu 2/12

3:34 pm-11:16 pm

1 stop7h 42m

$303

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Tue 5/26

6:40 am-11:55 am

1 stop5h 15m

Islip Long Island

Fri 5/29

4:30 pm-8:00 pm

1 stop3h 30m

$306

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Tue 2/24

12:35 pm-9:55 pm

2 stops9h 20m

Islip Long Island

Sun 3/1

5:35 am-2:30 pm

2 stops8h 55m

$344

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Fri 4/24

8:00 am-11:10 am

2 stops27h 10m

Islip Long Island

Thu 4/30

4:07 pm-4:00 pm

1 stop23h 53m

$366

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Wed 2/11

10:00 am-4:15 pm

1 stop6h 15m

Islip Long Island

Sun 2/15

12:35 pm-10:05 pm

1 stop9h 30m

$369

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 3/16

1:00 pm-10:40 pm

1 stop9h 40m

Islip Long Island

Tue 3/24

6:10 am-12:00 pm

1 stop5h 50m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 44 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 December 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?

    Southwest, JetBlue, and Frontier can get you from Pennsylvania to Islip, New York in just under 5h 45m. Your travel time can differ by up to 15h 43m. 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 Washington, D.C. Dulles Intl - Islip Long Island or Pittsburgh - 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 December 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

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