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Islip

$73+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
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 November 21, 2025.

This Trip.com deal was found by Cheapflights users on 11/18. 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.
Thu 12/410:00 pmPHL - ISP
1 stop21h 34mFrontier
Mon 12/810:19 amISP - PHL
2 stops14h 32mFrontier
Deal found 11/18$180
This Kiwi.com deal was found by Cheapflights users on 11/18. 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
1 stop21h 34mMultiple Airlines
Mon 12/810:19 amISP - PHL
1 stop13h 15mMultiple Airlines
Deal found 11/18$194
This Frontier deal was found by Cheapflights users on 11/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:20 pmIAD - ISP
1 stop11h 53mFrontier
Sun 12/1411:15 amISP - IAD
1 stop9h 09mFrontier
Deal found 11/21$282
This Kiwi.com deal was found by Cheapflights users on 11/19. 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 12/175:59 amEWR - ISP
2 stops16h 45mMultiple Airlines
Wed 12/248:21 pmISP - EWR
1 stop19h 57mMultiple Airlines
Deal found 11/19$293
This Kiwi.com deal was found by Cheapflights users on 11/20. 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 12/1910:43 amIAD - ISP
1 stop13h 16mFrontier
Mon 12/222:04 pmISP - IAD
1 stop6h 59mFrontier
Deal found 11/20$294
This Priceline deal was found by Cheapflights users on 11/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:26 pmIAD - ISP
1 stop6h 33mFrontier
Thu 11/276:00 amISP - IAD
1 stop10h 31mFrontier
Deal found 11/19$302
This Southwest deal was found by Cheapflights users on 11/19. 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 12/196:15 pmPIT - ISP
1 stop5h 40mSouthwest
Sun 12/215:40 amISP - PIT
1 stop7h 05mSouthwest
Deal found 11/19$326
This Frontier deal was found by Cheapflights users on 11/19. 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.
Sun 12/149:20 pmIAD - ISP
1 stop11h 53mFrontier
Sun 12/212:04 pmISP - IAD
1 stop6h 59mFrontier
Deal found 11/19$336
This Frontier deal was found by Cheapflights users on 11/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:26 pmIAD - ISP
1 stop6h 33mFrontier
Fri 11/286:00 amISP - IAD
1 stop10h 31mFrontier
Deal found 11/20$352
This Kiwi.com deal was found by Cheapflights users on 11/20. 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.
Wed 12/311:24 pmJFK - ISP
1 stop8h 53mFrontier
Sat 1/36:40 pmISP - JFK
1 stop15h 20mFrontier
Deal found 11/20$354
This Kiwi.com deal was found by Cheapflights users on 11/20. 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.
Wed 12/3111:05 amEWR - ISP
1 stop8h 36mMultiple Airlines
Sat 1/32:19 pmISP - EWR
2 stops25h 59mMultiple Airlines
Deal found 11/20$355
This Southwest deal was found by Cheapflights users on 11/20. 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.
Fri 12/197:30 amDCA - ISP
1 stop9h 35mSouthwest
Mon 12/226:55 amISP - DCA
1 stop9h 00mSouthwest
Deal found 11/20$362

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 November 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$180
(Trip.com)

One-way from

$73
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$706
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. 24% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 21, 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 12/4

10:00 pm-7:34 pm

1 stop21h 34m

Islip Long Island

Mon 12/8

10:19 am-12:51 am

2 stops14h 32m

$180

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 12/4

10:00 pm-7:34 pm

1 stop21h 34m

Islip Long Island

Mon 12/8

10:19 am-11:34 pm

1 stop13h 15m

$194

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 12/12

9:20 pm-9:13 am

1 stop11h 53m

Islip Long Island

Sun 12/14

11:15 am-8:24 pm

1 stop9h 09m

$282

NewarkIslip

EWR - ISP

EWRISP

Newark

Wed 12/17

5:59 am-10:44 pm

2 stops16h 45m

Islip Long Island

Wed 12/24

8:21 pm-4:18 pm

1 stop19h 57m

$293

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 12/19

10:43 am-11:59 pm

1 stop13h 16m

Islip Long Island

Mon 12/22

2:04 pm-9:03 pm

1 stop6h 59m

$294

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Fri 12/19

6:15 pm-11:55 pm

1 stop5h 40m

Islip Long Island

Sun 12/21

5:40 am-12:45 pm

1 stop7h 05m

$326

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 1/8

7:55 am-2:35 pm

1 stop6h 40m

Islip Long Island

Sun 1/11

2:10 pm-10:55 pm

2 stops8h 45m

$332

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sun 12/14

9:20 pm-9:13 am

1 stop11h 53m

Islip Long Island

Sun 12/21

2:04 pm-9:03 pm

1 stop6h 59m

$336

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Wed 12/31

1:24 pm-10:17 pm

1 stop8h 53m

Islip Long Island

Sat 1/3

6:40 pm-10:00 am

1 stop15h 20m

$354

NewarkIslip

EWR - ISP

EWRISP

Newark

Wed 12/31

11:05 am-7:41 pm

1 stop8h 36m

Islip Long Island

Sat 1/3

2:19 pm-4:18 pm

2 stops25h 59m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 55 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 January is currently the most expensive (average of $68). 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 November 21, 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, 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 15h 54m. 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 ($73), Breeze Airways ($143), and Southwest ($161).

  • 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. Dulles Intl - Islip Long Island. You may also consider Washington, D.C. Reagan-National - Islip Long Island or New York John F Kennedy 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 January is currently the most expensive (average of $68). 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 November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$310FlexibilityNo cancel feeOn-time63%

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