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Islip

$98+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Jul 29 — Aug 51
Wed 7/29
Wed 8/5
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 June 29, 2026.

This Southwest deal was found by Cheapflights users on 6/25. 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 8/205:35 am
PIT
-
ISP
1 stop4h 05m
Southwest
Mon 8/244:05 pm
ISP
-
PIT
1 stop5h 45m
Southwest
Deal found 6/25$215
This Expedia deal was found by Cheapflights users on 6/27. 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 8/1012:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Fri 8/1410:57 am
ISP
-
IAD
1 stop25h 29m
Frontier
Deal found 6/27$248
This Expedia deal was found by Cheapflights users on 6/24. 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 7/1312:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Wed 7/1510:57 am
ISP
-
IAD
1 stop25h 50m
Frontier
Deal found 6/24$260
This Trip.com deal was found by Cheapflights users on 6/27. 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 7/3112:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Mon 8/310:57 am
ISP
-
IAD
1 stop25h 50m
Frontier
Deal found 6/27$261
This Frontier deal was found by Cheapflights users on 6/25. 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 8/207:10 pm
PIT
-
ISP
1 stop14h 43m
Frontier
Mon 8/2410:57 am
ISP
-
PIT
1 stop7h 18m
Frontier
Deal found 6/25$262
This Frontier deal was found by Cheapflights users on 6/28. 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.
Mon 7/1312:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Fri 7/1710:57 am
ISP
-
IAD
1 stop7h 36m
Frontier
Deal found 6/28$290
This Expedia deal was found by Cheapflights users on 6/27. 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.
Fri 8/1412:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Mon 8/1710:57 am
ISP
-
IAD
1 stop23h 10m
Frontier
Deal found 6/27$318
This Kiwi.com deal was found by Cheapflights users on 6/28. 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 9/111:05 am
IAD
-
ISP
1 stop22h 48m
Multiple Airlines
Thu 10/110:57 am
ISP
-
IAD
2 stops13h 31m
Multiple Airlines
Deal found 6/28$328
This Trip.com deal was found by Cheapflights users on 6/27. 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.
Tue 7/141:32 pm
IAD
-
ISP
1 stop20h 21m
Frontier
Sat 7/1810:43 am
ISP
-
IAD
1 stop26h 04m
Frontier
Deal found 6/27$329
This Trip.com deal was found by Cheapflights users on 6/24. 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 7/2412:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Sat 7/2510:43 am
ISP
-
IAD
1 stop26h 04m
Frontier
Deal found 6/24$331
This Trip.com deal was found by Cheapflights users on 6/25. 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.
Wed 7/812:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Wed 7/1510:57 am
ISP
-
IAD
1 stop25h 50m
Frontier
Deal found 6/25$335
This Frontier deal was found by Cheapflights users on 6/25. 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 9/179:21 am
IAD
-
ISP
1 stop9h 30m
Frontier
Sun 9/207:46 pm
ISP
-
IAD
1 stop12h 40m
Frontier
Deal found 6/25$337

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 June 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$215
(Southwest)

One-way from

$98
(Southwest)

Popular in

February

Cheapest in

August

Average price

$429
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. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 29, 2026.
Use the filters below to find and compare flights from Pennsylvania to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Thu 8/20

5:35 am-9:40 am

1 stop4h 05m

Islip Long Island

Mon 8/24

4:05 pm-9:50 pm

1 stop5h 45m

$215

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Mon 7/13

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Wed 7/15

10:57 am-12:47 pm

1 stop25h 50m

$260

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 7/24

5:25 pm-11:45 pm

1 stop6h 20m

Islip Long Island

Sat 7/25

5:30 am-11:10 am

1 stop5h 40m

$347

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Thu 8/20

6:00 am-11:55 am

1 stop5h 55m

Islip Long Island

Sun 8/23

10:30 am-6:50 pm

1 stop8h 20m

$347

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Fri 7/10

5:50 pm-11:40 pm

1 stop5h 50m

Islip Long Island

Tue 7/14

4:40 pm-10:30 pm

1 stop5h 50m

$349

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 12/11

6:10 am-3:35 pm

2 stops9h 25m

Islip Long Island

Mon 12/14

5:10 pm-10:55 pm

1 stop5h 45m

$352

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 9/4

12:55 pm-9:30 pm

1 stop8h 35m

Islip Long Island

Sun 9/6

10:20 am-10:00 pm

1 stop11h 40m

$352

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Mon 8/10

6:00 am-11:55 am

1 stop5h 55m

Islip Long Island

Fri 8/14

6:45 am-2:40 pm

2 stops7h 55m

$362

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Tue 9/1

12:00 pm-9:49 pm

1 stop9h 49m

Islip Long Island

Wed 9/2

6:00 am-1:32 pm

1 stop7h 32m

$363

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Tue 9/1

11:30 am-9:49 pm

1 stop10h 19m

Islip Long Island

Wed 9/2

6:00 am-2:54 pm

1 stop8h 54m

$363

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 60 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 4h 05m. Your travel time can differ by up to 5h 44m. 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 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.

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 June 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$339FlexibilityNo cancel feeOn-time63%

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