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Islip

$89+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
May 5 — May 121
Tue 5/5
Tue 5/12
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 April 5, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/4. 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.
Sat 5/21:45 pm
EWR
-
ISP
1 stop19h 28m
Multiple Airlines
Sat 5/911:00 am
ISP
-
EWR
1 stop12h 25m
Multiple Airlines
Deal found 4/4$185
This Kiwi.com deal was found by Cheapflights users on 4/4. 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.
Sat 5/28:25 pm
LGA
-
ISP
1 stop12h 48m
Multiple Airlines
Sat 5/911:00 am
ISP
-
LGA
1 stop11h 05m
Multiple Airlines
Deal found 4/4$211
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 5/287:45 am
IAD
-
ISP
2 stops26h 20m
Frontier
Tue 6/26:02 pm
ISP
-
IAD
1 stop22h 20m
Frontier
Deal found 4/3$222
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Mon 5/48:25 pm
LGA
-
ISP
1 stop14h 35m
Multiple Airlines
Wed 5/611:00 am
ISP
-
LGA
1 stop11h 05m
Multiple Airlines
Deal found 4/2$227
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Mon 5/48:25 pm
LGA
-
ISP
1 stop14h 35m
Frontier
Wed 5/611:00 am
ISP
-
LGA
2 stops12h 14m
Frontier
Deal found 4/2$233
This Kiwi.com deal was found by Cheapflights users on 4/2. 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.
Mon 5/49:00 pm
EWR
-
ISP
1 stop14h 00m
Multiple Airlines
Wed 5/611:00 am
ISP
-
EWR
2 stops14h 18m
Multiple Airlines
Deal found 4/2$239
This Expedia deal was found by Cheapflights users on 4/4. 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 4/68:34 am
IAD
-
ISP
1 stop15h 49m
Frontier
Thu 4/98:36 pm
ISP
-
IAD
1 stop13h 35m
Frontier
Deal found 4/4$250
This Kiwi.com deal was found by Cheapflights users on 4/4. 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.
Sat 5/28:25 pm
LGA
-
ISP
1 stop12h 48m
Frontier
Sat 5/96:43 pm
ISP
-
LGA
2 stops51h 17m
Frontier
Deal found 4/4$258
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/163:23 pm
PHL
-
ISP
2 stops17h 50m
Multiple Airlines
Mon 4/204:07 pm
ISP
-
PHL
1 stop18h 31m
Multiple Airlines
Deal found 4/1$258
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 5/1910:11 am
PHL
-
ISP
1 stop23h 54m
Frontier
Tue 5/266:02 pm
ISP
-
PHL
1 stop14h 57m
Frontier
Deal found 4/3$263
This Kiwi.com deal was found by Cheapflights users on 4/3. 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 5/196:10 pm
PHL
-
ISP
1 stop15h 55m
Multiple Airlines
Tue 5/262:08 pm
ISP
-
PHL
2 stops18h 33m
Multiple Airlines
Deal found 4/3$265
This Expedia deal was found by Cheapflights users on 4/4. 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 5/153:59 pm
IAD
-
ISP
1 stop25h 59m
Frontier
Sun 5/1711:12 am
ISP
-
IAD
1 stop7h 30m
Frontier
Deal found 4/4$280

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 April 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$185
(Kiwi.com)

One-way from

$89
(Trip.com)

Popular in

February

Cheapest in

August
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 ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 21% potential price decrease ($60 potential savings vs. average RT price).
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 April 5, 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

NewarkIslip

EWR - ISP

EWRISP

Newark

Sat 5/2

1:45 pm-9:13 am

1 stop19h 28m

Islip Long Island

Sat 5/9

11:00 am-11:25 pm

1 stop12h 25m

$185

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Sat 5/2

8:25 pm-9:13 am

1 stop12h 48m

Islip Long Island

Sat 5/9

11:00 am-10:05 pm

1 stop11h 05m

$211

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 5/28

7:45 am-10:05 am

2 stops26h 20m

Islip Long Island

Tue 6/2

6:02 pm-4:22 pm

1 stop22h 20m

$222

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Mon 5/4

8:25 pm-11:00 am

1 stop14h 35m

Islip Long Island

Wed 5/6

11:00 am-11:14 pm

2 stops12h 14m

$233

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Thu 7/9

1:38 pm-10:03 am

1 stop20h 25m

Islip Long Island

Sun 7/12

10:48 am-12:53 pm

1 stop26h 05m

$250

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 6/12

12:32 pm-7:05 pm

1 stop6h 33m

Islip Long Island

Sun 6/14

10:48 am-12:53 pm

1 stop26h 05m

$250

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Sat 5/2

8:25 pm-9:13 am

1 stop12h 48m

Islip Long Island

Sat 5/9

6:43 pm-10:00 pm

2 stops51h 17m

$258

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 5/19

10:11 am-10:05 am

1 stop23h 54m

Islip Long Island

Tue 5/26

6:02 pm-8:59 am

1 stop14h 57m

$263

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 5/19

6:10 pm-10:05 am

1 stop15h 55m

Islip Long Island

Tue 5/26

2:08 pm-8:41 am

2 stops18h 33m

$265

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 4/16

7:30 am-9:13 am

1 stop25h 43m

Islip Long Island

Mon 4/20

4:07 pm-10:38 am

1 stop18h 31m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

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

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 $48). Flying from Pennsylvania to Islip, New York in March is currently the most expensive (average of $109). 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.

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 6h 05m. Your travel time can differ by up to 20h 15m. 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. 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, January is the cheapest month in which you can book a flight from Pennsylvania to Islip, New York (average of $48). Flying from Pennsylvania to Islip, New York in March is currently the most expensive (average of $109). 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

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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 April 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$203Average$310FlexibilityNo cancel feeOn-time63%

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