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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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
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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 August 16, 2025.

Round-trip from

$161
(Frontier)

One-way from

$82
(Trip.com)

Popular in

November

Cheapest in

August

Average price

$229
From Pennsylvania to Islip Long Island
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One-way flight from Pennsylvania to Islip Long Island
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Highest demand for flights based on searches. 18% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 16, 2025.

This Frontier deal was found by Cheapflights users on 8/13. 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 9/115:01 amPHL - ISP
1 stop11h 26mFrontier
Fri 9/125:05 pmISP - PHL
1 stop7h 47mFrontier
Deal found 8/13$161
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:14 pmIAD - ISP
1 stop15h 36mFrontier
Sun 9/75:12 pmISP - IAD
1 stop26h 57mFrontier
Deal found 8/15$167
This Frontier deal was found by Cheapflights users on 8/15. 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 9/58:00 amPHL - ISP
1 stop8h 27mFrontier
Sat 9/611:40 amISP - PHL
1 stop7h 57mFrontier
Deal found 8/15$168
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 9/56:59 amJFK - ISP
1 stop27h 56mFrontier
Sat 9/65:05 pmISP - JFK
1 stop17h 19mFrontier
Deal found 8/15$175
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:14 pmIAD - ISP
1 stop15h 26mFrontier
Sat 9/205:18 pmISP - IAD
1 stop28h 01mFrontier
Deal found 8/14$190
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:14 pmIAD - ISP
1 stop15h 26mFrontier
Fri 9/269:49 amISP - IAD
1 stop10h 20mFrontier
Deal found 8/15$191
This Frontier deal was found by Cheapflights users on 8/14. 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 11/139:52 pmIAD - ISP
1 stop11h 17mFrontier
Sun 11/169:27 pmISP - IAD
2 stops19h 07mFrontier
Deal found 8/14$193
This Frontier deal was found by Cheapflights users on 8/14. 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 9/188:59 pmIAD - ISP
1 stop12h 05mFrontier
Sun 9/2111:25 amISP - IAD
1 stop6h 49mFrontier
Deal found 8/14$199
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 10/109:26 pmPIT - ISP
1 stop13h 11mMultiple Airlines
Tue 10/149:37 pmISP - PIT
1 stop11h 42mMultiple Airlines
Deal found 8/15$201
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:14 pmIAD - ISP
1 stop15h 26mFrontier
Sun 9/219:49 amISP - IAD
1 stop11h 30mFrontier
Deal found 8/15$205
This Kiwi.com deal was found by Cheapflights users on 8/15. 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 9/146:30 pmPHL - ISP
1 stop16h 10mFrontier
Sun 9/2111:25 amISP - PHL
1 stop20h 10mFrontier
Deal found 8/15$206
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 9/511:15 amEWR - ISP
2 stops23h 40mMultiple Airlines
Mon 9/85:05 pmISP - EWR
1 stop18h 55mMultiple Airlines
Deal found 8/16$217

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 August 16, 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 9/11

5:01 am-4:27 pm

1 stop11h 26m

Islip Long Island

Fri 9/12

5:05 pm-12:52 am

1 stop7h 47m

$161

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 9/6

7:14 pm-10:50 am

1 stop15h 36m

Islip Long Island

Sun 9/7

5:12 pm-8:09 pm

1 stop26h 57m

$167

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 9/12

8:59 pm-4:23 pm

1 stop19h 24m

Islip Long Island

Sun 9/14

11:25 am-6:14 pm

1 stop6h 49m

$167

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 9/9

2:30 pm-10:40 am

1 stop20h 10m

Islip Long Island

Fri 9/12

9:49 am-10:33 pm

1 stop12h 44m

$168

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 9/12

10:16 pm-10:55 am

1 stop12h 39m

Islip Long Island

Mon 9/15

5:05 pm-12:52 am

1 stop7h 47m

$168

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 9/26

10:16 pm-10:55 am

1 stop12h 39m

Islip Long Island

Mon 9/29

5:05 pm-12:52 am

1 stop7h 47m

$168

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 9/5

8:00 am-4:27 pm

1 stop8h 27m

Islip Long Island

Sat 9/6

11:40 am-7:37 pm

1 stop7h 57m

$168

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Fri 9/5

6:59 am-10:55 am

1 stop27h 56m

Islip Long Island

Sat 9/6

5:05 pm-10:24 am

1 stop17h 19m

$175

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 9/13

7:14 pm-10:40 am

1 stop15h 26m

Islip Long Island

Sat 9/20

5:18 pm-9:19 pm

1 stop28h 01m

$190

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 9/22

7:14 pm-10:40 am

1 stop15h 26m

Islip Long Island

Fri 9/26

9:49 am-8:09 pm

1 stop10h 20m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

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, January is the cheapest month in which you can book a flight from Pennsylvania to Islip, New York (average of $108). Flying from Pennsylvania to Islip, New York in November is currently the most expensive (average of $213). 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 August 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Pennsylvania to Islip, New York as you normally would.

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.

  • 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 Pittsburgh - Islip Long Island or Washington, D.C. Reagan-National - 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, January is the cheapest month in which you can book a flight from Pennsylvania to Islip, New York (average of $108). Flying from Pennsylvania to Islip, New York in November is currently the most expensive (average of $213). 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 August 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$332FlexibilityNo cancel feeOn-time63%

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