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Islip

$82+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Jan 1 — Jan 81
Thu 1/1
Thu 1/8
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 December 2, 2025.

This Expedia deal was found by Cheapflights users on 11/30. 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.
Mon 12/159:26 amIAD - ISP
1 stop14h 33mFrontier
Fri 12/198:35 pmISP - IAD
1 stop24h 55mFrontier
Deal found 11/30$208
This Mytrip deal was found by Cheapflights users on 12/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/89:26 amIAD - ISP
1 stop14h 33mFrontier
Thu 12/111:15 pmISP - IAD
1 stop19h 16mFrontier
Deal found 12/1$213
This Mytrip deal was found by Cheapflights users on 12/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/159:26 amIAD - ISP
1 stop14h 33mFrontier
Thu 12/186:00 amISP - IAD
1 stop27h 48mFrontier
Deal found 12/1$217
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
Mon 12/89:26 amIAD - ISP
1 stop14h 33mMultiple Airlines
Thu 12/1111:40 amISP - IAD
2 stops20h 51mMultiple Airlines
Deal found 12/1$222
This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
Tue 12/165:30 amPHL - ISP
1 stop14h 04mMultiple Airlines
Thu 12/184:40 pmISP - PHL
1 stop19h 50mMultiple Airlines
Deal found 12/2$233
This Kiwi.com deal was found by Cheapflights users on 12/2. 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.
Wed 12/1712:20 pmPHL - ISP
2 stops23h 05mMultiple Airlines
Sun 12/214:28 pmISP - PHL
1 stop16h 39mMultiple Airlines
Deal found 12/2$248
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
Tue 12/169:00 amIAD - ISP
2 stops10h 34mFrontier
Sat 12/206:40 pmISP - IAD
1 stop26h 23mFrontier
Deal found 12/1$251
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
Tue 12/99:00 amIAD - ISP
2 stops26h 42mFrontier
Sat 12/1310:19 amISP - IAD
1 stop10h 05mFrontier
Deal found 12/1$269
This Kiwi.com deal was found by Cheapflights users on 12/1. 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.
Mon 12/159:26 amIAD - ISP
1 stop14h 33mMultiple Airlines
Thu 12/182:19 pmISP - IAD
2 stops21h 19mMultiple Airlines
Deal found 12/1$291
This Mytrip deal was found by Cheapflights users on 11/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:58 pmIAD - ISP
1 stop13h 27mFrontier
Sun 1/46:15 amISP - IAD
1 stop27h 33mFrontier
Deal found 11/30$317
This Kiwi.com deal was found by Cheapflights users on 11/30. 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 12/410:00 pmPHL - ISP
2 stops15h 45mMultiple Airlines
Sat 12/1310:19 amISP - PHL
1 stop13h 15mMultiple Airlines
Deal found 11/30$338
This Mytrip deal was found by Cheapflights users on 11/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:20 pmIAD - ISP
1 stop11h 53mFrontier
Sun 12/712:07 pmISP - IAD
1 stop20h 24mFrontier
Deal found 11/30$342

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 December 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$147
(Kiwi.com)

One-way from

$82
(Trip.com)

Popular in

November

Cheapest in

August

Average price

$487
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. 18% potential increase in price ($81 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 2, 2025.
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

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 1/22

8:07 pm-6:38 pm

1 stop22h 31m

Islip Long Island

Mon 1/26

7:43 pm-2:44 pm

1 stop19h 01m

$147

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 1/29

8:20 am-6:48 pm

2 stops10h 28m

Islip Long Island

Sun 2/1

7:53 pm-10:26 am

1 stop14h 33m

$182

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 1/9

6:00 am-1:21 pm

1 stop7h 21m

Islip Long Island

Sun 1/11

8:40 pm-12:33 pm

1 stop15h 53m

$183

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 12/15

9:26 am-11:59 pm

1 stop14h 33m

Islip Long Island

Fri 12/19

8:35 pm-9:30 pm

1 stop24h 55m

$208

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 12/8

9:26 am-11:59 pm

1 stop14h 33m

Islip Long Island

Thu 12/11

1:15 pm-8:31 am

1 stop19h 16m

$213

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Fri 2/27

10:00 pm-10:40 am

1 stop12h 40m

Islip Long Island

Sun 3/15

11:55 am-11:05 am

2 stops23h 10m

$214

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 12/15

9:26 am-11:59 pm

1 stop14h 33m

Islip Long Island

Thu 12/18

6:00 am-9:48 am

1 stop27h 48m

$217

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Fri 2/27

10:00 pm-10:40 am

1 stop12h 40m

Islip Long Island

Fri 3/13

8:19 pm-11:05 am

1 stop14h 46m

$219

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 12/8

9:26 am-11:59 pm

1 stop14h 33m

Islip Long Island

Thu 12/11

11:40 am-8:31 am

2 stops20h 51m

$222

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 12/16

5:30 am-7:34 pm

1 stop14h 04m

Islip Long Island

Thu 12/18

4:40 pm-12:30 pm

1 stop19h 50m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 60 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 $70). 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.

What is the cheapest time of day to fly from PA to ISP?

Find hourly flight availability from Pennsylvania to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 2, 2025.

When flying from Pennsylvania to Islip, New York, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 39% versus a flight in the afternoon.

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, JetBlue, and Southwest can get you from Pennsylvania to Islip, New York in just under 9h 15m. Your travel time can differ by up to 13h 16m. The distance from Pennsylvania to Islip, New York is about 248 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 New York John F Kennedy Intl - Islip Long Island. You may also consider Washington, D.C. Reagan-National - 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 $70). 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 December 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$332FlexibilityNo cancel feeOn-time63%

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