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Islip

$109+ 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 12/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Dec 25 — Jan 11
Thu 12/25
Thu 1/1
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 25, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/98:00 amPHL - ISP
1 stop11h 34mMultiple Airlines
Sat 12/1310:19 amISP - PHL
2 stops12h 57mMultiple Airlines
Deal found 11/24$172
This Frontier deal was found by Cheapflights users on 11/25. 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.
Sun 12/149:20 pmIAD - ISP
1 stop11h 53mFrontier
Sun 12/212:04 pmISP - IAD
1 stop6h 59mFrontier
Deal found 11/25$232
This Kiwi.com deal was found by Cheapflights users on 11/23. 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 12/97:10 amPIT - ISP
1 stop12h 24mMultiple Airlines
Sat 12/1310:19 amISP - PIT
2 stops23h 39mMultiple Airlines
Deal found 11/23$237
This Southwest deal was found by Cheapflights users on 11/23. 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.
Sat 12/136:00 amPIT - ISP
1 stop5h 50mSouthwest
Tue 12/163:55 pmISP - PIT
1 stop6h 00mSouthwest
Deal found 11/23$254
This Frontier deal was found by Cheapflights users on 11/25. 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.
Fri 12/129:20 pmIAD - ISP
1 stop11h 53mFrontier
Sun 12/1411:15 amISP - IAD
1 stop9h 09mFrontier
Deal found 11/25$272
This Southwest deal was found by Cheapflights users on 11/25. 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 12/1110:45 amPIT - ISP
1 stop4h 35mSouthwest
Mon 12/1512:55 pmISP - PIT
1 stop4h 45mSouthwest
Deal found 11/25$321
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:25 amPHL - ISP
1 stop7h 44mMultiple Airlines
Mon 12/298:35 pmISP - PHL
2 stops23h 50mMultiple Airlines
Deal found 11/24$323
This Kiwi.com deal was found by Cheapflights users on 11/22. 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 12/69:20 pmIAD - ISP
2 stops12h 38mMultiple Airlines
Sun 12/712:00 pmISP - IAD
1 stop7h 55mMultiple Airlines
Deal found 11/22$332
This Southwest deal was found by Cheapflights users on 11/25. 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.
Mon 12/295:00 amPIT - ISP
1 stop12h 05mSouthwest
Fri 1/25:40 amISP - PIT
1 stop7h 05mSouthwest
Deal found 11/25$345
This Southwest deal was found by Cheapflights users on 11/25. 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.
Wed 12/242:30 pmPIT - ISP
1 stop7h 00mSouthwest
Sat 12/275:30 amISP - PIT
1 stop6h 10mSouthwest
Deal found 11/25$358
This Southwest deal was found by Cheapflights users on 11/25. 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.
Fri 12/122:15 pmPIT - ISP
2 stops9h 35mSouthwest
Mon 12/1512:55 pmISP - PIT
2 stops8h 10mSouthwest
Deal found 11/25$359
This Southwest deal was found by Cheapflights users on 11/24. 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 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
Sun 12/216:55 amISP - DCA
1 stop9h 00mSouthwest
Deal found 11/24$372

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 25, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$163
(Kiwi.com)

One-way from

$109
(Kiwi.com)

Popular in

November

Cheapest in

August

Average price

$571
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. 18% potential increase in price ($81 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($20 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 25, 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

Tue 12/9

8:00 am-7:34 pm

1 stop11h 34m

Islip Long Island

Sat 12/13

10:19 am-11:16 pm

2 stops12h 57m

$172

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 1/8

12:03 pm-1:21 pm

1 stop25h 18m

Islip Long Island

Thu 1/15

8:45 pm-11:58 am

1 stop15h 13m

$179

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 1/23

9:35 am-8:00 pm

1 stop10h 25m

Islip Long Island

Sun 1/25

7:53 pm-4:28 pm

2 stops20h 35m

$212

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

$232

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Tue 12/9

7:10 am-7:34 pm

1 stop12h 24m

Islip Long Island

Sat 12/13

10:19 am-9:58 am

2 stops23h 39m

$237

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 1/9

6:00 am-1:21 pm

1 stop7h 21m

Islip Long Island

Sun 1/11

11:55 am-11:42 pm

2 stops11h 47m

$245

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 1/23

9:35 am-8:00 pm

1 stop10h 25m

Islip Long Island

Sun 1/25

12:00 pm-8:06 pm

1 stop8h 06m

$246

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Sat 12/13

6:00 am-11:50 am

1 stop5h 50m

Islip Long Island

Tue 12/16

3:55 pm-9:55 pm

1 stop6h 00m

$254

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

$272

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Thu 12/11

10:45 am-3:20 pm

1 stop4h 35m

Islip Long Island

Mon 12/15

12:55 pm-5:40 pm

1 stop4h 45m

$321

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

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, 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 25, 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 50m. Your travel time can differ by up to 7h 02m. 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 ($112), Southwest ($164), and Breeze Airways ($164).

  • 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 Philadelphia - 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 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$219Average$332FlexibilityNo cancel feeOn-time63%

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