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$191+ Cheap flights from Islip, NY to Philadelphia (ISP - PHL)

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — PHL
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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Cheap flight deals from Islip to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Philadelphia (PHL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$492
(JetBlue)

One-way from

$191
(JetBlue)

Popular in

February

Cheapest in

September

Average price

$220
Provider with most accurate pricing for Islip Long Island-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Philadelphia flights.
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From Islip Long Island to Philadelphia
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One-way flight from Islip Long Island to Philadelphia
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Highest demand for flights based on searches. 19% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Islip to Philadelphia

Cheapest flights from Islip to Philadelphia
Explore the most affordable flight options available from Islip to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/53:18 pmISP - PHL
1 stop20h 20mFrontier
Mon 4/74:24 pmPHL - ISP
1 stop27h 45mFrontier
Deal found 4/1$398
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/59:04 pmISP - PHL
1 stop11h 42mMultiple Airlines
Mon 4/76:55 amPHL - ISP
2 stops27h 05mMultiple Airlines
Deal found 4/1$413
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/26:00 amISP - PHL
1 stop3h 41mJetBlue
Fri 5/95:30 pmPHL - ISP
1 stop3h 58mJetBlue
Deal found 4/2$492

Cheapflights Fare Finder

Customize your flight search to find flights from Islip to Philadelphia 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 3, 2025.
Use the filters below to find and compare flights from Islip to Philadelphia that are best for you.

Fly from

Islip

Fly to

Philadelphia

Route

Depart

Return

Price

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 4/5

3:18 pm-11:38 am

1 stop20h 20m

Philadelphia

Mon 4/7

4:24 pm-8:09 pm

1 stop27h 45m

$398

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 4/5

9:04 pm-8:46 am

1 stop11h 42m

Philadelphia

Mon 4/7

6:55 am-10:00 am

2 stops27h 05m

$413

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Fri 5/2

6:00 am-9:41 am

1 stop3h 41m

Philadelphia

Fri 5/9

5:30 pm-9:28 pm

1 stop3h 58m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Compare providers for flights from Islip to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Philadelphia in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia 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 Philadelphia

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

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Philadelphia (average of $236). Flying from Islip, New York to Philadelphia 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.

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated April 3, 2025.
JetBlue
7.3
Good
2,920 reviews

Crew

8.0

Food

6.7

Boarding

7.5

Comfort

7.6

Overall

7.3

Entertainment

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job
JetBlue
7.3
Good
2,920 reviews
JetBlue
7.3
Good
2,920 reviews

Crew

8.0

Food

6.7

Boarding

7.5

Comfort

7.6

Overall

7.3

Entertainment

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job

Related info for your journey

Find useful and relevant information for your journey from Islip to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Philadelphia 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 Philadelphia?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to Philadelphia (average of $236). Flying from Islip, New York to Philadelphia 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

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
King of Prussia
Vineland
Pottstown
Wildwood
Reading
Cherry Hill
Exton
Ocean City
Essington
Chester
Newark
Middletown
Willow Grove
Millville
Ephrata
Camden
Dewey Beach
West Chester
Malvern
Dover

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