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Islip

$92+ 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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 March 10, 2026.

This Southwest deal was found by Cheapflights users on 3/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:50 am
PIT
-
ISP
1 stop3h 00m
Southwest
Tue 4/146:30 am
ISP
-
PIT
1 stop5h 20m
Southwest
Deal found 3/6$207
This Southwest deal was found by Cheapflights users on 3/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:30 pm
PIT
-
ISP
2 stops9h 40m
Southwest
Fri 4/175:10 pm
ISP
-
PIT
1 stop6h 10m
Southwest
Deal found 3/6$220
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Mon 4/207:10 pm
PHL
-
ISP
2 stops40h 00m
Multiple Airlines
Mon 4/278:31 pm
ISP
-
PHL
1 stop15h 20m
Multiple Airlines
Deal found 3/6$253
This Expedia deal was found by Cheapflights users on 3/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/43:57 pm
IAD
-
ISP
1 stop8h 00m
Frontier
Sat 4/115:45 am
ISP
-
IAD
1 stop9h 25m
Frontier
Deal found 3/7$270
This Southwest deal was found by Cheapflights users on 3/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:00 am
PIT
-
ISP
1 stop9h 05m
Southwest
Tue 6/306:00 am
ISP
-
PIT
1 stop6h 05m
Southwest
Deal found 3/6$306
This Kiwi.com deal was found by Cheapflights users on 3/6. 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.
Mon 6/154:30 pm
PIT
-
ISP
1 stop16h 38m
Multiple Airlines
Sat 6/206:09 pm
ISP
-
PIT
1 stop4h 31m
Multiple Airlines
Deal found 3/6$307
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/511:00 am
JFK
-
ISP
1 stop8h 04m
Frontier
Sun 4/127:59 pm
ISP
-
JFK
2 stops39h 51m
Frontier
Deal found 3/8$323
This Southwest deal was found by Cheapflights users on 3/5. 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 5/294:25 pm
DCA
-
ISP
1 stop6h 05m
Southwest
Sun 5/311:50 pm
ISP
-
DCA
1 stop9h 00m
Southwest
Deal found 3/5$327
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 5/148:09 am
IAD
-
ISP
2 stops11h 04m
Multiple Airlines
Sun 5/174:07 pm
ISP
-
IAD
1 stop15h 20m
Multiple Airlines
Deal found 3/9$329
This Southwest deal was found by Cheapflights users on 3/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:05 am
DCA
-
ISP
1 stop10h 30m
Southwest
Wed 4/86:55 am
ISP
-
DCA
1 stop8h 50m
Southwest
Deal found 3/6$332
This Southwest deal was found by Cheapflights users on 3/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
DCA
-
ISP
1 stop6h 05m
Southwest
Sun 5/105:15 am
ISP
-
DCA
1 stop6h 45m
Southwest
Deal found 3/7$347
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 5/85:30 am
PHL
-
ISP
1 stop7h 58m
Multiple Airlines
Mon 5/114:07 pm
ISP
-
PHL
2 stops25h 53m
Multiple Airlines
Deal found 3/9$354

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$207
(Southwest)

One-way from

$92
(Kiwi.com)

Popular in

February

Cheapest in

August

Average price

$159
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. 14% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 10, 2026.
Use the filters below to find and compare flights from Pennsylvania to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 4/20

7:10 pm-11:10 am

2 stops40h 00m

Islip Long Island

Mon 4/27

8:31 pm-11:51 am

1 stop15h 20m

$253

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 4/4

3:57 pm-11:57 pm

1 stop8h 00m

Islip Long Island

Sat 4/11

5:45 am-3:10 pm

1 stop9h 25m

$270

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Sat 6/27

5:00 am-2:05 pm

1 stop9h 05m

Islip Long Island

Tue 6/30

6:00 am-12:05 pm

1 stop6h 05m

$306

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Wed 4/15

3:50 pm-10:40 pm

1 stop6h 50m

Islip Long Island

Fri 4/17

5:10 pm-11:20 pm

1 stop6h 10m

$310

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Sun 4/5

11:00 am-7:04 pm

1 stop8h 04m

Islip Long Island

Sun 4/12

7:59 pm-11:50 am

2 stops39h 51m

$323

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 5/29

4:25 pm-10:30 pm

1 stop6h 05m

Islip Long Island

Sun 5/31

1:50 pm-10:50 pm

1 stop9h 00m

$327

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 5/14

8:09 am-7:13 pm

2 stops11h 04m

Islip Long Island

Sun 5/17

4:07 pm-7:27 am

1 stop15h 20m

$329

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Sat 6/13

12:00 pm-10:55 pm

2 stops10h 55m

Islip Long Island

Mon 6/15

5:20 am-12:00 pm

1 stop6h 40m

$332

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 4/22

1:00 pm-10:40 pm

1 stop9h 40m

Islip Long Island

Fri 4/24

6:50 am-3:40 pm

1 stop8h 50m

$332

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 4/7

6:05 am-4:35 pm

1 stop10h 30m

Islip Long Island

Wed 4/8

2:30 pm-10:25 pm

2 stops7h 55m

$338

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $43). Flying from Pennsylvania to Islip, New York in February is currently the most expensive (average of $93). 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 and Southwest can get you from Pennsylvania to Islip, New York in just under 9h 05m. Your travel time can differ by up to 6h 35m. 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 Pittsburgh - Islip Long Island or Washington, D.C. Dulles 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 $43). Flying from Pennsylvania to Islip, New York in February is currently the most expensive (average of $93). 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$203Average$310FlexibilityNo cancel feeOn-time63%

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