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$99+ Cheap flights from Islip, NY (ISP) to Pennsylvania

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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Islip to Pennsylvania

Keep the following information in mind while searching for Islip to Pennsylvania flight deals. Data was last updated July 29, 2025.

Round-trip from

$165
(Southwest)

One-way from

$99
(Southwest)

Popular in

April

Cheapest in

September

Average price

$406
From Islip Long Island to Pennsylvania
Search Deals
One-way flight from Islip Long Island to Pennsylvania
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Highest demand for flights based on searches. 11% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Islip to Pennsylvania

Cheapest flights from Islip to Pennsylvania
Explore the most affordable flight options available from Islip to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/275:30 amISP - PIT
1 stop5h 50mSouthwest
Wed 9/36:00 amPIT - ISP
1 stop5h 55mSouthwest
Deal found 7/28$165
This lastminute.com 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/611:35 amISP - DCA
1 stop9h 19mJetBlue
Sun 9/72:59 pmDCA - ISP
1 stop24h 24mJetBlue
Deal found 7/27$215
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 9/66:05 amISP - DCA
1 stop10h 55mSouthwest
Sun 9/76:55 amDCA - ISP
2 stops10h 05mSouthwest
Deal found 7/27$348
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/132:12 pmISP - PIT
1 stop18h 32mMultiple Airlines
Sun 8/1710:06 amPIT - ISP
1 stop13h 41mMultiple Airlines
Deal found 7/29$354
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.
Thu 8/286:05 amISP - PHL
1 stop8h 33mMultiple Airlines
Fri 8/295:45 amPHL - ISP
1 stop12h 53mMultiple Airlines
Deal found 7/28$394
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/92:05 pmISP - PHL
1 stop8h 42mFrontier
Sun 8/105:25 amPHL - ISP
1 stop7h 39mFrontier
Deal found 7/27$434
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/132:12 pmISP - PIT
1 stop18h 32mBreeze Airways
Sun 8/178:50 pmPIT - ISP
2 stops13h 14mBreeze Airways
Deal found 7/29$520
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/121:55 pmISP - LGA
2 stops20h 05mMultiple Airlines
Sat 8/163:28 pmLGA - ISP
3 stops42h 28mMultiple Airlines
Deal found 7/28$640
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:30 amISP - DCA
2 stops7h 52mMultiple Airlines
Mon 9/85:27 pmDCA - ISP
2 stops17h 31mMultiple Airlines
Deal found 7/28$725
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1211:20 amISP - JFK
1 stop11h 42mJetBlue
Sat 8/169:40 pmJFK - ISP
1 stop14h 01mJetBlue
Deal found 7/28$744
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/52:19 pmISP - SCE
2 stops26h 42mMultiple Airlines
Fri 8/153:10 pmSCE - ISP
2 stops22h 14mMultiple Airlines
Deal found 7/28$1,142

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Pennsylvania 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, 2025.
Use the filters below to find and compare flights from Islip to Pennsylvania that are best for you.

Fly from

Islip

Fly to

Pennsylvania

Route

Depart

Return

Price

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Wed 8/27

5:30 am-11:20 am

1 stop5h 50m

Pittsburgh

Wed 9/3

6:00 am-11:55 am

1 stop5h 55m

$165

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sat 9/6

11:35 am-8:54 pm

1 stop9h 19m

Washington, D.C. Reagan-National

Sun 9/7

2:59 pm-3:23 pm

1 stop24h 24m

$215

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sat 9/6

6:05 am-5:00 pm

1 stop10h 55m

Washington, D.C. Reagan-National

Sun 9/7

6:55 am-5:00 pm

2 stops10h 05m

$348

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Wed 8/13

2:12 pm-8:44 am

1 stop18h 32m

Pittsburgh

Sun 8/17

10:06 am-11:47 pm

1 stop13h 41m

$354

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 8/28

6:05 am-2:38 pm

1 stop8h 33m

Philadelphia

Fri 8/29

5:45 am-6:38 pm

1 stop12h 53m

$394

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 8/9

2:05 pm-10:47 pm

1 stop8h 42m

Philadelphia

Sun 8/10

5:25 am-1:04 pm

1 stop7h 39m

$434

IslipPittsburgh

ISP - PIT

ISPPIT

Islip Long Island

Wed 8/13

2:12 pm-8:44 am

1 stop18h 32m

Pittsburgh

Sun 8/17

8:50 pm-10:04 am

2 stops13h 14m

$520

IslipNew York

ISP - LGA

ISPLGA

Islip Long Island

Wed 8/13

2:12 pm-11:08 pm

2 stops32h 56m

New York LaGuardia

Sun 8/17

11:04 am-10:04 am

3 stops23h 00m

$625

IslipNew York

ISP - JFK

ISPJFK

Islip Long Island

Wed 8/13

1:51 pm-11:00 pm

1 stop9h 09m

New York John F Kennedy Intl

Sun 8/17

9:40 pm-10:51 am

1 stop13h 11m

$640

IslipWashington, D.C.

ISP - DCA

ISPDCA

Islip Long Island

Sat 9/6

7:30 am-3:22 pm

2 stops7h 52m

Washington, D.C. Reagan-National

Mon 9/8

5:27 pm-10:58 am

2 stops17h 31m

$725

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 24 results
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Best time to book a flight from Islip to Pennsylvania

Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Islip 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 Islip to Pennsylvania

What is the cheapest month to book a flight from Islip, New York to Pennsylvania?

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Pennsylvania (average of $236). Flying from Islip, New York to Pennsylvania in March is currently the most expensive (average of $295). 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 ISP to PA?

Find hourly flight availability from Islip to Pennsylvania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Islip, New York to Pennsylvania as you normally would.

Reviews of airlines servicing Pennsylvania

Get insights into the airlines that provide service to Pennsylvania. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pennsylvania. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Southwest, Breeze Airways, and JetBlue from Islip to Pennsylvania by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Breeze Airways
8.0
Very good
190 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,913 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Islip to Pennsylvania. 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 from for flights from Islip to Pennsylvania?

    Located just 7.2 mi from the city center, Islip Long Island (ISP) is the airport most travelers will use when flying to Pennsylvania from Islip.

  • What are the cheapest airlines to fly from Islip, New York to Pennsylvania one-way?

    One-way options have recently been found by users for as low as $99 on Southwest. Other airlines that offer cheap prices include Frontier from $115 and JetBlue from $118 one-way.

  • What are the most popular routes from Islip, New York to Pennsylvania?

    When deciding which route to take from Islip, New York to Pennsylvania consider Islip Long Island - Pittsburgh, Islip Long Island - Washington, D.C. Reagan-National or Islip Long Island - Philadelphia as they are the most popular.

  • Can I find deals for flights from Islip to Pennsylvania that include hotel bookings?

    Yes. In addition to deals on Islip to Pennsylvania flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Pennsylvania?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Pennsylvania.

  • Can I find deals for business class flights from Islip to Pennsylvania?

    Yes. Cheapflights offers flight deals from Islip to Pennsylvania 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 Islip, New York to Pennsylvania?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to Pennsylvania (average of $236). Flying from Islip, New York to Pennsylvania in March is currently the most expensive (average of $295). 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

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Alternative routes for Islip to Pennsylvania

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Islip to Pennsylvania

Discover the top airline that operate flights from Islip to Pennsylvania. 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, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$229Average$326FlexibilityNo cancel feeOn-time63%

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