HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$86+ 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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pennsylvania to Islip with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/31. 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 2/155:15 am
EWR
-
ISP
2 stops10h 57m
Multiple Airlines
Tue 2/178:00 am
ISP
-
EWR
1 stop30h 05m
Multiple Airlines
Deal found 1/31$317
This Southwest deal was found by Cheapflights users on 2/1. 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 2/273:25 pm
PIT
-
ISP
2 stops8h 05m
Southwest
Sun 3/15:35 pm
ISP
-
PIT
1 stop5h 45m
Southwest
Deal found 2/1$326
This Southwest deal was found by Cheapflights users on 2/2. 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 3/47:55 am
DCA
-
ISP
1 stop6h 40m
Southwest
Wed 3/116:10 am
ISP
-
DCA
1 stop5h 50m
Southwest
Deal found 2/2$327
This Southwest deal was found by Cheapflights users on 2/2. 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 9/196:20 am
PIT
-
ISP
2 stops8h 10m
Southwest
Sat 9/265:30 am
ISP
-
PIT
2 stops8h 30m
Southwest
Deal found 2/2$331
This Southwest deal was found by Cheapflights users on 2/1. 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 3/37:55 am
DCA
-
ISP
1 stop6h 40m
Southwest
Sun 3/812:20 pm
ISP
-
DCA
1 stop8h 30m
Southwest
Deal found 2/1$337
This Southwest deal was found by Cheapflights users on 2/2. 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 3/51:00 pm
DCA
-
ISP
1 stop9h 40m
Southwest
Sun 3/812:20 pm
ISP
-
DCA
1 stop8h 30m
Southwest
Deal found 2/2$342
This Southwest deal was found by Cheapflights users on 1/31. 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 9/45:35 am
PIT
-
ISP
1 stop4h 05m
Southwest
Fri 9/116:10 am
ISP
-
PIT
1 stop6h 00m
Southwest
Deal found 1/31$369
This Southwest deal was found by Cheapflights users on 2/2. 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 3/37:55 am
DCA
-
ISP
1 stop6h 40m
Southwest
Fri 3/612:15 pm
ISP
-
DCA
1 stop10h 30m
Southwest
Deal found 2/2$372
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 2/511:05 am
EWR
-
ISP
1 stop7h 43m
Multiple Airlines
Sun 2/87:26 pm
ISP
-
EWR
2 stops28h 04m
Multiple Airlines
Deal found 2/1$397
This Frontier deal was found by Cheapflights users on 2/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:10 am
IAD
-
ISP
1 stop26h 37m
Frontier
Sun 3/85:08 pm
ISP
-
IAD
1 stop14h 16m
Frontier
Deal found 2/2$405
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/52:10 pm
IAD
-
ISP
1 stop21h 05m
Multiple Airlines
Sun 3/85:08 pm
ISP
-
IAD
2 stops21h 10m
Multiple Airlines
Deal found 2/2$407
This Southwest deal was found by Cheapflights users on 2/1. 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 3/77:10 am
DCA
-
ISP
2 stops10h 10m
Southwest
Tue 3/102:20 pm
ISP
-
DCA
2 stops8h 15m
Southwest
Deal found 2/1$419

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 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$317
(Kiwi.com)

One-way from

$86
(Trip.com)

Popular in

November

Cheapest in

August

Average price

$408
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 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 3, 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

NewarkIslip

EWR - ISP

EWRISP

Newark

Sun 2/15

5:15 am-4:12 pm

2 stops10h 57m

Islip Long Island

Tue 2/17

8:00 am-2:05 pm

1 stop30h 05m

$317

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Fri 2/27

5:00 am-4:45 pm

1 stop11h 45m

Islip Long Island

Sun 3/1

1:10 pm-6:30 pm

1 stop5h 20m

$326

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Sat 3/7

6:05 am-1:45 pm

1 stop7h 40m

Islip Long Island

Tue 3/10

6:10 am-12:00 pm

1 stop5h 50m

$327

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Wed 3/4

7:55 am-2:35 pm

1 stop6h 40m

Islip Long Island

Wed 3/11

6:10 am-12:00 pm

1 stop5h 50m

$327

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 3/3

7:55 am-2:35 pm

1 stop6h 40m

Islip Long Island

Sun 3/8

12:20 pm-8:50 pm

1 stop8h 30m

$337

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 3/5

1:00 pm-10:40 pm

1 stop9h 40m

Islip Long Island

Sun 3/8

12:20 pm-8:50 pm

1 stop8h 30m

$342

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 3/3

7:55 am-2:35 pm

1 stop6h 40m

Islip Long Island

Fri 3/6

12:15 pm-10:55 pm

2 stops10h 40m

$372

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 3/5

10:10 am-12:47 pm

1 stop26h 37m

Islip Long Island

Sun 3/8

5:08 pm-7:24 am

1 stop14h 16m

$405

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 3/5

2:10 pm-11:15 am

1 stop21h 05m

Islip Long Island

Sun 3/8

5:08 pm-2:18 pm

2 stops21h 10m

$407

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Tue 2/17

7:30 am-1:30 pm

1 stop6h 00m

Islip Long Island

Sat 2/21

3:25 pm-9:55 pm

1 stop6h 30m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 40 results
1
2
3
4

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, Frontier, and JetBlue can get you from Pennsylvania to Islip, New York in just under 11h 09m. Your travel time can differ by up to 15h 28m. The distance from Pennsylvania to Islip, New York is about 41 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 $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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Pennsylvania to Islip

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to John F Kennedy Intl flights
San Francisco to Newark flights
San Francisco to LaGuardia flights
Dallas/Fort Worth to John F Kennedy Intl flights
Los Angeles to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Miami to John F Kennedy Intl flights
Fort Lauderdale to John F Kennedy Intl flights
Orlando to John F Kennedy Intl flights
Atlanta to LaGuardia flights
Los Angeles to Newark flights
Fort Lauderdale to Newark flights
Miami to Newark flights
Dallas/Fort Worth to Newark flights
Los Angeles to LaGuardia flights
Denver to Newark flights
Hobby to LaGuardia flights
Fort Lauderdale to LaGuardia flights
O'Hare Intl to John F Kennedy Intl flights
Miami to LaGuardia flights
Atlanta to John F Kennedy Intl flights
Hobby to John F Kennedy Intl flights
Seattle to Newark flights
O'Hare Intl to LaGuardia flights
Raleigh to LaGuardia flights
Denver to LaGuardia flights
Hobby to Newark flights
Charlotte to John F Kennedy Intl flights
Atlanta to Newark flights
O'Hare Intl to Newark flights
Denver to John F Kennedy Intl flights
Orlando to LaGuardia flights
San Jose to John F Kennedy Intl flights
Austin to John F Kennedy Intl flights
Raleigh to John F Kennedy Intl flights
Tampa to John F Kennedy Intl flights
Orlando to Newark flights
Sky Harbor Intl to John F Kennedy Intl flights
San Jose to Newark flights
Oakland to John F Kennedy Intl flights
West Palm Beach to Newark flights
George Bush Intcntl to John F Kennedy Intl flights
Tampa to LaGuardia flights
George Bush Intcntl to Newark flights
Seattle to John F Kennedy Intl flights
Tampa to Newark flights
Raleigh to Newark flights
Oakland to Newark flights
Minneapolis to John F Kennedy Intl flights
Minneapolis to LaGuardia flights

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 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights