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Islip

$61+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
May 23 — May 301
Sat 5/23
Sat 5/30
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 23, 2026.

This Expedia deal was found by Cheapflights users on 4/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/83:59 pm
IAD
-
ISP
1 stop25h 59m
Frontier
Sun 5/1011:12 am
ISP
-
IAD
1 stop7h 30m
Frontier
Deal found 4/21$201
This Southwest deal was found by Cheapflights users on 4/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:40 am
PIT
-
ISP
1 stop5h 15m
Southwest
Tue 5/266:30 am
ISP
-
PIT
1 stop5h 20m
Southwest
Deal found 4/21$202
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/56:37 pm
IAD
-
ISP
1 stop15h 28m
Frontier
Sat 5/911:00 am
ISP
-
IAD
2 stops12h 09m
Frontier
Deal found 4/21$203
This Expedia deal was found by Cheapflights users on 4/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:12 am
IAD
-
ISP
1 stop26h 48m
Frontier
Thu 5/711:12 am
ISP
-
IAD
1 stop7h 30m
Frontier
Deal found 4/21$205
This Trip.com deal was found by Cheapflights users on 4/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:12 am
IAD
-
ISP
1 stop26h 48m
Frontier
Fri 5/811:00 am
ISP
-
IAD
1 stop7h 42m
Frontier
Deal found 4/19$213
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/196:10 pm
PHL
-
ISP
1 stop15h 55m
Frontier
Tue 5/266:02 pm
ISP
-
PHL
1 stop14h 57m
Frontier
Deal found 4/21$215
This eDestinos deal was found by Cheapflights users on 4/19. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:27 pm
IAD
-
ISP
1 stop14h 38m
Frontier
Mon 5/116:59 pm
ISP
-
IAD
2 stops21h 22m
Frontier
Deal found 4/19$215
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Tue 5/196:37 pm
IAD
-
ISP
1 stop15h 28m
Frontier
Wed 6/1010:48 am
ISP
-
IAD
1 stop26h 05m
Frontier
Deal found 4/19$220
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Tue 5/196:37 pm
IAD
-
ISP
1 stop15h 28m
Multiple Airlines
Wed 6/1010:48 am
ISP
-
IAD
2 stops33h 14m
Multiple Airlines
Deal found 4/19$224
This Expedia deal was found by Cheapflights users on 4/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/121:38 pm
IAD
-
ISP
1 stop20h 25m
Frontier
Sun 6/1410:48 am
ISP
-
IAD
1 stop26h 05m
Frontier
Deal found 4/22$230
This Kiwi.com deal was found by Cheapflights users on 4/19. 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.
Mon 5/410:38 pm
PHL
-
ISP
1 stop12h 22m
Multiple Airlines
Fri 5/86:59 pm
ISP
-
PHL
2 stops20h 03m
Multiple Airlines
Deal found 4/19$236
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
Fri 6/53:00 pm
LGA
-
ISP
1 stop19h 15m
Multiple Airlines
Fri 6/1210:48 am
ISP
-
LGA
1 stop11h 17m
Multiple Airlines
Deal found 4/22$245

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 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$201
(Expedia)

One-way from

$61
(Trip.com)

Popular in

February

Cheapest in

August

Average price

$424
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. 13% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease ($53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 23, 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

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Tue 5/5

6:37 pm-10:05 am

1 stop15h 28m

Islip Long Island

Sat 5/9

11:00 am-11:09 pm

2 stops12h 09m

$203

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 5/19

6:10 pm-10:05 am

1 stop15h 55m

Islip Long Island

Tue 5/26

6:02 pm-8:59 am

1 stop14h 57m

$215

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 5/8

7:27 pm-10:05 am

1 stop14h 38m

Islip Long Island

Mon 5/11

6:59 pm-4:21 pm

2 stops21h 22m

$215

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 6/12

1:38 pm-10:03 am

1 stop20h 25m

Islip Long Island

Sun 6/14

10:48 am-12:53 pm

1 stop26h 05m

$230

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Tue 5/19

5:55 am-1:50 pm

2 stops7h 55m

Islip Long Island

Tue 5/26

9:00 am-5:55 pm

2 stops8h 55m

$235

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 5/4

10:38 pm-11:00 am

1 stop12h 22m

Islip Long Island

Fri 5/8

6:59 pm-3:02 pm

2 stops20h 03m

$236

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Fri 6/5

3:00 pm-10:15 am

1 stop19h 15m

Islip Long Island

Fri 6/12

10:48 am-10:05 pm

1 stop11h 17m

$245

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 5/4

10:38 pm-11:00 am

1 stop12h 22m

Islip Long Island

Fri 5/8

11:00 am-11:29 pm

1 stop12h 29m

$251

New YorkIslip

LGA - ISP

LGAISP

New York LaGuardia

Wed 6/10

8:29 pm-10:03 am

1 stop13h 34m

Islip Long Island

Tue 6/23

4:41 pm-4:01 pm

1 stop23h 20m

$265

NewarkIslip

EWR - ISP

EWRISP

Newark

Fri 6/5

4:00 pm-10:15 am

2 stops18h 15m

Islip Long Island

Fri 6/12

2:28 pm-8:21 pm

1 stop5h 53m

$270

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/19

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?

    Frontier, Southwest, and JetBlue can get you from Pennsylvania to Islip, New York in just under 7h 39m. Your travel time can differ by up to 7h 49m. The distance from Pennsylvania to Islip, New York is about 37 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 Pittsburgh - Islip Long Island or Washington, D.C. Dulles 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?

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Alternative routes for Pennsylvania to Islip

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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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$203Average$304FlexibilityNo cancel feeOn-time63%

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