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Islip

$61+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
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Find 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 October 22, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/144:30 pmLGA - ISP
1 stop18h 07mMultiple Airlines
Mon 11/174:58 pmISP - LGA
1 stop16h 02mMultiple Airlines
Deal found 10/20$151
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/144:30 pmLGA - ISP
1 stop18h 07mFrontier
Mon 11/174:58 pmISP - LGA
2 stops18h 31mFrontier
Deal found 10/20$183
This Trip.com deal was found by Cheapflights users on 10/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:36 pmIAD - ISP
1 stop14h 01mFrontier
Sun 11/169:27 pmISP - IAD
1 stop22h 25mFrontier
Deal found 10/21$183
This Kiwi.com deal was found by Cheapflights users on 10/20. 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 11/148:36 pmIAD - ISP
1 stop14h 01mMultiple Airlines
Sun 11/1611:40 amISP - IAD
2 stops10h 29mMultiple Airlines
Deal found 10/20$202
This Southwest deal was found by Cheapflights users on 10/20. 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 12/65:40 amPIT - ISP
1 stop5h 40mSouthwest
Mon 12/86:15 amISP - PIT
1 stop9h 20mSouthwest
Deal found 10/20$206
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 12/911:05 amEWR - ISP
1 stop8h 29mMultiple Airlines
Thu 12/1111:40 amISP - EWR
2 stops13h 49mMultiple Airlines
Deal found 10/21$222
This Frontier deal was found by Cheapflights users on 10/22. 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.
Fri 10/249:58 pmIAD - ISP
1 stop12h 39mFrontier
Mon 10/279:49 amISP - IAD
1 stop8h 56mFrontier
Deal found 10/22$228
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 12/95:45 amLGA - ISP
1 stop13h 49mMultiple Airlines
Thu 12/112:19 pmISP - LGA
2 stops9h 23mMultiple Airlines
Deal found 10/21$233
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/125:00 pmPHL - ISP
2 stops18h 00mMultiple Airlines
Fri 11/144:58 pmISP - PHL
1 stop8h 26mMultiple Airlines
Deal found 10/22$254
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/1810:39 amEWR - ISP
1 stop7h 03mMultiple Airlines
Tue 11/2511:03 amISP - EWR
1 stop13h 18mMultiple Airlines
Deal found 10/21$254
This Kiwi.com deal was found by Cheapflights users on 10/22. 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 11/67:55 pmPHL - ISP
2 stops17h 57mMultiple Airlines
Mon 11/108:47 pmISP - PHL
1 stop22h 32mMultiple Airlines
Deal found 10/22$264
This Kiwi.com deal was found by Cheapflights users on 10/21. 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 11/189:55 amLGA - ISP
1 stop7h 47mMultiple Airlines
Tue 11/252:19 pmISP - LGA
2 stops33h 02mMultiple Airlines
Deal found 10/21$275

Cheap flight deals from Pennsylvania to Islip

Keep the following information in mind while searching for Pennsylvania to Islip flight deals. Data was last updated October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$151
(Kiwi.com)

One-way from

$61
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$419
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. 15% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 22, 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

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Fri 11/14

4:30 pm-10:37 am

1 stop18h 07m

Islip Long Island

Mon 11/17

4:58 pm-9:00 am

1 stop16h 02m

$151

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Fri 11/14

4:30 pm-10:37 am

1 stop18h 07m

Islip Long Island

Mon 11/17

4:58 pm-11:29 am

2 stops18h 31m

$183

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 11/14

8:36 pm-10:37 am

1 stop14h 01m

Islip Long Island

Sun 11/16

9:27 pm-7:52 pm

1 stop22h 25m

$183

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 11/14

8:36 pm-10:37 am

1 stop14h 01m

Islip Long Island

Sun 11/16

11:40 am-10:09 pm

2 stops10h 29m

$202

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Sat 12/6

5:40 am-11:20 am

1 stop5h 40m

Islip Long Island

Mon 12/8

6:15 am-3:35 pm

1 stop9h 20m

$206

NewarkIslip

EWR - ISP

EWRISP

Newark

Tue 12/9

11:05 am-7:34 pm

1 stop8h 29m

Islip Long Island

Thu 12/11

11:40 am-1:29 am

2 stops13h 49m

$222

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Tue 12/9

5:45 am-7:34 pm

1 stop13h 49m

Islip Long Island

Thu 12/11

2:19 pm-11:42 pm

2 stops9h 23m

$233

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Wed 11/12

5:00 pm-11:00 am

2 stops18h 00m

Islip Long Island

Fri 11/14

4:58 pm-1:24 am

1 stop8h 26m

$254

NewarkIslip

EWR - ISP

EWRISP

Newark

Tue 11/18

10:39 am-5:42 pm

1 stop7h 03m

Islip Long Island

Tue 11/25

11:03 am-12:21 am

1 stop13h 18m

$254

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Tue 11/18

9:55 am-5:42 pm

1 stop7h 47m

Islip Long Island

Tue 11/25

2:19 pm-11:21 pm

2 stops33h 02m

$275

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/20

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 November is currently the most expensive (average of $86). 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 October 22, 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 48% 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, Southwest, and JetBlue can get you from Pennsylvania to Islip, New York in just under 5h 40m. Your travel time can differ by up to 12h 27m. 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 cheapest airlines to fly from Pennsylvania to Islip, New York one-way?

    The cheapest airlines for a one-way flight from Pennsylvania to Islip, New York are Frontier ($110), JetBlue ($116), and Southwest ($123).

  • 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 Washington, D.C. Dulles Intl - Islip Long Island or Pittsburgh - 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 November is currently the most expensive (average of $86). 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
Southampton

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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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

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