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$165+ 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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Apr 16 — Apr 231
Thu 4/16
Thu 4/23
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 March 17, 2026.

This Southwest deal was found by Cheapflights users on 3/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/204:30 pm
ISP
-
PIT
1 stop3h 30m
Southwest
Fri 4/245:45 am
PIT
-
ISP
1 stop6h 05m
Southwest
Deal found 3/12$225
This Southwest deal was found by Cheapflights users on 3/16. 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 4/104:30 pm
ISP
-
PIT
1 stop3h 30m
Southwest
Mon 4/135:00 pm
PIT
-
ISP
1 stop6h 30m
Southwest
Deal found 3/16$249
This Southwest deal was found by Cheapflights users on 3/16. 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 5/44:30 pm
ISP
-
PIT
1 stop3h 30m
Southwest
Thu 5/72:45 pm
PIT
-
ISP
2 stops8h 45m
Southwest
Deal found 3/16$265
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
Thu 4/164:07 pm
ISP
-
PHL
1 stop15h 34m
Multiple Airlines
Thu 4/236:12 pm
PHL
-
ISP
2 stops40h 58m
Multiple Airlines
Deal found 3/14$290
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 8/167:49 pm
ISP
-
PIT
1 stop16h 59m
Breeze Airways
Fri 8/213:37 pm
PIT
-
ISP
1 stop21h 56m
Breeze Airways
Deal found 3/16$320
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
Thu 4/164:07 pm
ISP
-
PHL
1 stop15h 34m
Frontier
Thu 4/2310:38 pm
PHL
-
ISP
1 stop10h 35m
Frontier
Deal found 3/14$324
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 4/1511:50 am
ISP
-
PHL
2 stops23h 51m
Multiple Airlines
Sun 4/1910:38 pm
PHL
-
ISP
1 stop10h 35m
Multiple Airlines
Deal found 3/16$325
This Southwest deal was found by Cheapflights users on 3/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/196:05 am
ISP
-
PIT
1 stop6h 00m
Southwest
Mon 8/2411:20 am
PIT
-
ISP
1 stop5h 05m
Southwest
Deal found 3/13$326
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 4/164:07 pm
ISP
-
PHL
1 stop15h 34m
Frontier
Sun 4/1910:38 pm
PHL
-
ISP
1 stop10h 35m
Frontier
Deal found 3/16$333
This Kiwi.com deal was found by Cheapflights users on 3/16. 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 4/164:07 pm
ISP
-
PHL
1 stop15h 34m
Multiple Airlines
Sun 4/195:32 pm
PHL
-
ISP
2 stops19h 59m
Multiple Airlines
Deal found 3/16$339
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Mon 3/308:45 pm
ISP
-
PIT
2 stops36h 53m
Multiple Airlines
Fri 4/37:40 pm
PIT
-
ISP
1 stop14h 50m
Multiple Airlines
Deal found 3/15$340
This Southwest deal was found by Cheapflights users on 3/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/305:55 pm
ISP
-
PIT
1 stop5h 45m
Southwest
Fri 4/32:30 pm
PIT
-
ISP
1 stop8h 10m
Southwest
Deal found 3/15$341

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 March 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$187
(Southwest)

One-way from

$165
(Kiwi.com)
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

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 March 17, 2026.
Use the filters below to find and compare flights from Islip to Pennsylvania that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Fri 4/10

4:30 pm-8:00 pm

1 stop3h 30m

Pittsburgh

Mon 4/13

5:00 pm-11:30 pm

1 stop6h 30m

$249

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Mon 5/4

4:30 pm-8:00 pm

1 stop3h 30m

Pittsburgh

Thu 5/7

2:45 pm-11:30 pm

2 stops8h 45m

$265

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Mon 4/20

4:30 pm-8:00 pm

1 stop3h 30m

Pittsburgh

Fri 4/24

10:35 am-8:25 pm

2 stops9h 50m

$287

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/15

11:50 am-11:41 am

2 stops23h 51m

Philadelphia

Sun 4/19

10:38 pm-9:13 am

1 stop10h 35m

$325

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Mon 3/30

8:45 pm-9:38 am

2 stops36h 53m

Pittsburgh

Fri 4/3

7:40 pm-10:30 am

1 stop14h 50m

$340

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Fri 5/15

5:10 pm-10:50 pm

1 stop5h 40m

Washington, D.C. Reagan-National

Sat 5/16

1:05 pm-10:40 pm

1 stop9h 35m

$352

IslipNew York

ISP - LGA

ISPLGA

Islip Long Island

Sun 4/12

7:59 pm-11:00 am

2 stops39h 01m

New York LaGuardia

Sun 4/19

8:25 pm-9:13 am

1 stop12h 48m

$355

IslipScranton

ISP - AVP

ISPAVP

Islip Long Island

Tue 6/2

5:27 pm-8:52 am

2 stops39h 25m

Wilkes-Barre Scranton

Tue 6/9

7:07 pm-9:08 am

1 stop14h 01m

$372

IslipNew York

ISP - LGA

ISPLGA

Islip Long Island

Fri 4/17

4:07 pm-10:00 am

2 stops17h 53m

New York LaGuardia

Sun 4/19

8:25 pm-9:13 am

1 stop12h 48m

$398

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 3/29

7:26 pm-8:39 am

2 stops37h 13m

Philadelphia

Thu 4/2

10:56 pm-10:56 am

1 stop12h 00m

$400

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/14

Showing 1-10 of 60 resultsSorted by cheapest first
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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 February is currently the most expensive (average of $99). 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 $249, 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 - Pittsburgh or Islip Long Island - New York John F Kennedy Intl 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 February is currently the most expensive (average of $99). 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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