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$79+ Cheap flights from Islip, NY (ISP) to Pennsylvania

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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Islip to Pennsylvania

Cheapest flights from Islip to Pennsylvania
Explore the most affordable flight options available from Islip to Pennsylvania. 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 1/27. 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.
Wed 2/1111:50 am
ISP
-
PHL
1 stop9h 55m
Multiple Airlines
Thu 3/55:30 am
PHL
-
ISP
1 stop9h 09m
Multiple Airlines
Deal found 1/27$182
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/94:30 pm
ISP
-
PIT
1 stop3h 30m
Southwest
Mon 4/135:00 pm
PIT
-
ISP
1 stop3h 25m
Southwest
Deal found 1/26$207
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.
Wed 2/1111:50 am
ISP
-
PIT
2 stops28h 49m
Multiple Airlines
Sun 2/155:45 am
PIT
-
ISP
1 stop13h 21m
Multiple Airlines
Deal found 1/27$286
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.
Wed 2/1111:50 am
ISP
-
LGA
1 stop7h 59m
Multiple Airlines
Sun 2/157:40 am
LGA
-
ISP
2 stops11h 26m
Multiple Airlines
Deal found 1/27$294
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.
Mon 3/231:22 pm
ISP
-
PHL
1 stop22h 19m
Frontier
Thu 3/2610:33 pm
PHL
-
ISP
1 stop14h 14m
Frontier
Deal found 1/28$298
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.
Mon 3/231:22 pm
ISP
-
PHL
2 stops19h 17m
Multiple Airlines
Thu 3/2610:33 pm
PHL
-
ISP
1 stop14h 14m
Multiple Airlines
Deal found 1/28$321
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.
Mon 3/22:10 pm
ISP
-
DCA
2 stops8h 45m
Southwest
Tue 3/37:55 am
DCA
-
ISP
1 stop6h 40m
Southwest
Deal found 1/27$332
This Southwest deal was found by Cheapflights users on 1/29. 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 4/226:55 am
ISP
-
DCA
1 stop8h 50m
Southwest
Sat 4/251:05 pm
DCA
-
ISP
1 stop8h 20m
Southwest
Deal found 1/29$337
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.
Sun 3/224:34 pm
ISP
-
PHL
2 stops31h 42m
Multiple Airlines
Thu 3/2610:33 pm
PHL
-
ISP
1 stop14h 14m
Multiple Airlines
Deal found 1/28$338
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.
Wed 2/1112:40 pm
ISP
-
PIT
2 stops8h 05m
Southwest
Sun 2/1512:25 pm
PIT
-
ISP
2 stops10h 15m
Southwest
Deal found 1/27$349
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 6/46:00 am
ISP
-
PIT
1 stop5h 45m
Southwest
Fri 6/56:05 am
PIT
-
ISP
2 stops8h 25m
Southwest
Deal found 1/27$366
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.
Fri 2/276:35 am
ISP
-
DCA
1 stop8h 20m
Southwest
Sun 3/17:30 am
DCA
-
ISP
1 stop9h 15m
Southwest
Deal found 1/27$397

Find flight deals from Islip to Pennsylvania

Keep the following information in mind while searching for Islip to Pennsylvania flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$182
(Kiwi.com)

One-way from

$79
(Kiwi.com)

Popular in

October

Cheapest in

March

Average price

$377
Provider with most accurate pricing for New York (NYC)-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Philadelphia flights.
Search Deals
From Islip Long Island to Pennsylvania
Search Deals
One-way flight from Islip Long Island to Pennsylvania
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($25 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 Islip to Pennsylvania 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 Islip to Pennsylvania that are best for you.

Fly from

Islip

Fly to

Pennsylvania

Route

Depart

Return

Price

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 2/11

11:50 am-9:45 pm

1 stop9h 55m

Philadelphia

Thu 3/5

5:30 am-2:39 pm

1 stop9h 09m

$182

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Thu 4/9

4:30 pm-8:00 pm

1 stop3h 30m

Pittsburgh

Mon 4/13

5:00 pm-8:25 pm

1 stop3h 25m

$207

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Wed 2/11

11:50 am-4:39 pm

2 stops28h 49m

Pittsburgh

Sun 2/15

5:45 am-7:06 pm

1 stop13h 21m

$286

IslipNew York

ISP - LGA

ISPLGA

Islip Long Island

Wed 2/11

11:50 am-7:49 pm

1 stop7h 59m

New York LaGuardia

Sun 2/15

7:40 am-7:06 pm

2 stops11h 26m

$294

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 3/23

1:22 pm-11:41 am

1 stop22h 19m

Philadelphia

Thu 3/26

10:33 pm-12:47 pm

1 stop14h 14m

$298

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 3/23

1:22 pm-8:39 am

2 stops19h 17m

Philadelphia

Thu 3/26

10:33 pm-12:47 pm

1 stop14h 14m

$321

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Mon 3/2

2:10 pm-10:55 pm

2 stops8h 45m

Washington, D.C. Reagan-National

Tue 3/3

7:55 am-2:35 pm

1 stop6h 40m

$332

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Wed 4/22

6:55 am-3:45 pm

1 stop8h 50m

Washington, D.C. Reagan-National

Sat 4/25

1:05 pm-9:25 pm

1 stop8h 20m

$337

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 3/22

4:34 pm-12:16 am

2 stops31h 42m

Philadelphia

Thu 3/26

10:33 pm-12:47 pm

1 stop14h 14m

$338

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Wed 2/11

12:40 pm-8:45 pm

2 stops8h 05m

Pittsburgh

Sun 2/15

12:25 pm-10:40 pm

2 stops10h 15m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 44 results
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Best time to book a flight from Islip to Pennsylvania

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

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

Currently, May is the cheapest month in which you can book a flight from Islip, New York to Pennsylvania (average of $31). Flying from Islip, New York to Pennsylvania in January is currently the most expensive (average of $81). 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 Islip to Pennsylvania. 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 from for flights from Islip to Pennsylvania?

    Located just 7.2 mi from the city center, Islip Long Island (ISP) is the airport most travelers will use when flying to Pennsylvania from Islip.

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

    For as low as $207, Southwest can have you in Pennsylvania from Islip, New York in 3h 30m. There are 375 mi between Islip, New York and Pennsylvania. This flight may include one or multiple stops.

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

    When deciding which route to take from Islip, New York to Pennsylvania consider Islip Long Island - Washington, D.C. Reagan-National, Islip Long Island - Philadelphia or Islip Long Island - Pittsburgh as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Pennsylvania 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 Islip, New York to Pennsylvania?

    Currently, May is the cheapest month in which you can book a flight from Islip, New York to Pennsylvania (average of $31). Flying from Islip, New York to Pennsylvania in January is currently the most expensive (average of $81). 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

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Alternative routes for Islip to Pennsylvania

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