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Islip

$100+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ISP
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
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 29, 2026.

This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:10 am
PIT
-
ISP
1 stop5h 55m
Southwest
Mon 9/284:05 pm
ISP
-
PIT
1 stop5h 50m
Southwest
Deal found 7/27$201
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/224:52 pm
IAD
-
ISP
1 stop17h 01m
Frontier
Sat 9/125:43 pm
ISP
-
IAD
1 stop16h 44m
Frontier
Deal found 7/28$217
This Southwest deal was found by Cheapflights users on 7/25. 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 9/254:10 pm
PIT
-
ISP
1 stop6h 00m
Southwest
Wed 9/306:05 am
ISP
-
PIT
1 stop6h 00m
Southwest
Deal found 7/25$219
This Expedia deal was found by Cheapflights users on 7/27. 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.
Sat 8/2212:28 pm
IAD
-
ISP
1 stop6h 33m
Frontier
Sun 8/237:09 pm
ISP
-
IAD
1 stop20h 58m
Frontier
Deal found 7/27$229
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:12 am
IAD
-
ISP
1 stop5h 46m
Frontier
Wed 9/165:43 pm
ISP
-
IAD
1 stop16h 34m
Frontier
Deal found 7/28$240
This Trip.com deal was found by Cheapflights users on 7/25. 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.
Sat 9/1211:12 am
IAD
-
ISP
1 stop5h 46m
Frontier
Sun 9/136:48 pm
ISP
-
IAD
1 stop18h 15m
Frontier
Deal found 7/25$241
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:52 pm
IAD
-
ISP
1 stop17h 01m
Frontier
Mon 9/710:57 am
ISP
-
IAD
1 stop23h 10m
Frontier
Deal found 7/28$246
This Expedia deal was found by Cheapflights users on 7/29. 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 8/284:52 pm
IAD
-
ISP
1 stop17h 01m
Frontier
Sun 8/307:09 pm
ISP
-
IAD
1 stop14h 41m
Frontier
Deal found 7/29$258
This Southwest deal was found by Cheapflights users on 7/26. 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 8/241:15 pm
ISP
-
PIT
2 stops8h 15m
Southwest
Deal found 7/26$259
This Trip.com deal was found by Cheapflights users on 7/26. 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 9/1611:12 am
IAD
-
ISP
1 stop5h 46m
Frontier
Sat 9/195:43 pm
ISP
-
IAD
1 stop16h 44m
Frontier
Deal found 7/26$262
This Trip.com deal was found by Cheapflights users on 7/29. 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 9/1011:12 am
IAD
-
ISP
1 stop5h 46m
Frontier
Mon 9/145:43 pm
ISP
-
IAD
1 stop16h 34m
Frontier
Deal found 7/29$271
This Southwest deal was found by Cheapflights users on 7/25. 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.
Tue 8/186:30 am
PIT
-
ISP
2 stops8h 25m
Southwest
Tue 8/2512:55 pm
ISP
-
PIT
2 stops7h 50m
Southwest
Deal found 7/25$271

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 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$201
(Southwest)

One-way from

$100
(Frontier)
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

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 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

Tue 8/18

6:10 am-10:15 am

1 stop4h 05m

Islip Long Island

Tue 8/25

3:20 pm-8:50 pm

1 stop5h 30m

$201

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Sat 9/26

6:10 am-12:05 pm

1 stop5h 55m

Islip Long Island

Mon 9/28

4:05 pm-9:55 pm

1 stop5h 50m

$201

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

$201

PittsburghIslip

PIT - ISP

PITISP

Pittsburgh

Fri 9/25

4:10 pm-10:10 pm

1 stop6h 00m

Islip Long Island

Wed 9/30

6:05 am-3:10 pm

2 stops9h 05m

$224

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Sat 9/12

11:12 am-4:58 pm

1 stop5h 46m

Islip Long Island

Sun 9/13

6:48 pm-1:03 pm

1 stop18h 15m

$241

Washington, D.C.Islip

IAD - ISP

IADISP

Washington, D.C. Dulles Intl

Fri 9/4

12:28 pm-7:01 pm

1 stop6h 33m

Islip Long Island

Mon 9/7

10:57 am-8:59 pm

1 stop10h 02m

$258

AllentownIslip

ABE - ISP

ABEISP

Allentown-Bethlehem

Mon 10/19

4:32 pm-3:03 pm

1 stop22h 31m

Islip Long Island

Fri 10/23

11:08 am-11:28 pm

1 stop12h 20m

$297

Washington, D.C.Islip

DCA - ISP

DCAISP

Washington, D.C. Reagan-National

Fri 10/2

4:35 pm-11:22 pm

1 stop6h 47m

Islip Long Island

Sun 10/4

7:00 am-2:58 pm

1 stop7h 58m

$313

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 8/24

5:16 pm-9:53 am

1 stop16h 37m

Islip Long Island

Mon 8/31

7:09 pm-8:51 am

1 stop13h 42m

$314

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 8/22

8:35 am-7:01 pm

1 stop10h 26m

Islip Long Island

Sat 8/29

11:57 am-9:41 pm

1 stop9h 44m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

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 2h 42m. 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 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?

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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 July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$196Average$413FlexibilityNo cancel feeOn-time63%

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