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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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Aug 20 — Aug 271
Thu 8/20
Thu 8/27
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 July 21, 2026.

This Southwest deal was found by Cheapflights users on 7/17. 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
Wed 8/263:20 pm
ISP
-
PIT
1 stop5h 30m
Southwest
Deal found 7/17$215
This Southwest deal was found by Cheapflights users on 7/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:35 am
PIT
-
ISP
1 stop4h 05m
Southwest
Fri 8/141:15 pm
ISP
-
PIT
2 stops9h 55m
Southwest
Deal found 7/18$245
This Expedia deal was found by Cheapflights users on 7/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2112:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Sun 8/237:09 pm
ISP
-
IAD
1 stop14h 41m
Frontier
Deal found 7/19$248
This Trip.com deal was found by Cheapflights users on 7/21. 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.
Wed 8/1911:05 am
IAD
-
ISP
1 stop22h 48m
Frontier
Fri 8/217:46 pm
ISP
-
IAD
1 stop15h 57m
Frontier
Deal found 7/21$253
This Trip.com deal was found by Cheapflights users on 7/17. 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 9/312:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Mon 9/710:57 am
ISP
-
IAD
1 stop23h 10m
Frontier
Deal found 7/17$260
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 9/211:05 am
IAD
-
ISP
1 stop22h 48m
Multiple Airlines
Tue 9/85:27 pm
ISP
-
IAD
2 stops43h 40m
Multiple Airlines
Deal found 7/19$261
This Frontier deal was found by Cheapflights users on 7/17. 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 7/17$278
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/184:45 pm
PHL
-
ISP
2 stops17h 08m
Multiple Airlines
Tue 8/255:27 pm
ISP
-
PHL
1 stop17h 48m
Multiple Airlines
Deal found 7/21$288
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 9/168:00 pm
IAD
-
ISP
1 stop13h 33m
Multiple Airlines
Sat 9/1912:00 pm
ISP
-
IAD
2 stops12h 28m
Multiple Airlines
Deal found 7/17$290
This Kiwi.com deal was found by Cheapflights users on 7/20. 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.
Tue 8/187:25 am
PHL
-
ISP
1 stop9h 22m
Multiple Airlines
Mon 8/247:09 pm
ISP
-
PHL
2 stops17h 17m
Multiple Airlines
Deal found 7/20$296
This Southwest deal was found by Cheapflights users on 7/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/135:35 am
PIT
-
ISP
1 stop4h 05m
Southwest
Mon 8/175:00 pm
ISP
-
PIT
1 stop6h 10m
Southwest
Deal found 7/16$296
This Orbitz deal was found by Cheapflights users on 7/19. 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 Orbitz 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
Wed 8/1210:57 am
ISP
-
IAD
1 stop25h 50m
Frontier
Deal found 7/19$298

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 July 21, 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

$749
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
High demand for flights, 4% potential price rise
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 21, 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

Sat 8/22

3:15 pm-8:45 pm

1 stop5h 30m

$215

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Thu 8/20

5:35 am-9:40 am

1 stop4h 05m

Islip Long Island

Wed 8/26

3:20 pm-8:50 pm

1 stop5h 30m

$215

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Mon 8/10

5:35 am-9:40 am

1 stop4h 05m

Islip Long Island

Fri 8/14

1:15 pm-11:10 pm

2 stops9h 55m

$245

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 8/22

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Sun 8/23

7:46 pm-11:43 am

1 stop15h 57m

$248

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 8/21

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Sun 8/23

7:09 pm-9:50 am

1 stop14h 41m

$248

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 8/18

4:45 pm-9:53 am

2 stops17h 08m

Islip Long Island

Tue 8/25

5:27 pm-11:15 am

1 stop17h 48m

$288

NewarkIslip

EWR - ISP

EWRISP

Newark

Thu 9/10

12:17 pm-9:33 am

2 stops21h 16m

Islip Long Island

Wed 9/16

4:13 pm-10:27 am

1 stop18h 14m

$302

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 9/19

6:00 am-11:20 am

1 stop5h 20m

Islip Long Island

Tue 9/22

12:00 pm-11:11 pm

2 stops11h 11m

$306

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Thu 8/13

5:35 am-9:40 am

1 stop4h 05m

Islip Long Island

Mon 8/17

1:15 pm-11:10 pm

2 stops9h 55m

$311

New YorkIslip

JFK - ISP

JFKISP

New York John F Kennedy Intl

Thu 8/27

9:30 am-7:33 pm

1 stop10h 03m

Islip Long Island

Thu 9/3

4:58 pm-1:18 am

1 stop8h 20m

$312

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

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 58m. 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 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.

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 July 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$413FlexibilityNo cancel feeOn-time63%

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