$174+ 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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Islip to Philadelphia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 June 12, 2025.
Round-trip from | $298 (Frontier) |
|---|---|
One-way from | $174 (FlightHub) |
Popular in | April |
Cheapest in | September |
Average price | $306 |
Find flight deals from Islip to Philadelphia
Cheapest flights from Islip to PhiladelphiaExplore 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 June 12, 2025.
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 June 12, 2025.
This Frontier deal was found by Cheapflights users on 6/11. 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.
This Mytrip deal was found by Cheapflights users on 6/10. 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.
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 June 12, 2025.
Use the filters below to find and compare flights from Islip to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
IslipPhiladelphia
ISP - PHL
ISPPHL
Islip Long Island
Wed 6/25
8:00 am-12:23 pm
1 stop4h 23m
Philadelphia
Sat 6/28
6:35 pm-10:52 pm
1 stop4h 17m
IslipPhiladelphia
ISP - PHL
ISPPHL
Islip Long Island
Wed 6/25
2:55 pm-10:39 pm
2 stops31h 44m
Philadelphia
Sun 6/29
6:20 am-6:59 pm
2 stops12h 39m
IslipPhiladelphia
ISP - PHL
ISPPHL
Islip Long Island
Fri 6/20
8:21 pm-11:48 pm
1 stop27h 27m
IslipPhiladelphia
ISP - PHL
ISPPHL
Islip Long Island
Tue 7/15
12:35 pm-7:25 pm
1 stop6h 50m
IslipPhiladelphia
ISP - PHL
ISPPHL
Islip Long Island
Fri 6/20
10:44 am-5:00 pm
3 stops30h 16m
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.
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 June 12, 2025.
Overall
Food
Boarding
Comfort
Entertainment
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Anonymous,Feb 2025
JFK - CHS
Overall
Food
Boarding
Comfort
Entertainment
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Reviews
Anonymous,Feb 2025
JFK - CHS
Overall
Food
Boarding
Comfort
Entertainment
Crew
Reviews
Anonymous,Feb 2025
JFK - CHS