$177 Cheap Flights from Philadelphia (PHL) to Islip (ISP)

View $177 flight on Sun, Aug 17, 2025Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP)

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Cheap Flights from Philadelphia to Islip (PHL-ISP)

Prices were available within the past 7 days and start at $177 for one-way flights and $262 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Thu, Sep 18 - Fri, Sep 26
PHL
Philadelphia
ISP
Islip
$262 Roundtrip, found 4 days ago
$262
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Thu, Sep 18 from Philadelphia to Islip, returning Fri, Sep 26, priced at $262 found 4 days ago
JetBlue Airways
Tue, Sep 23 - Fri, Sep 26
PHL
Philadelphia
ISP
Islip
$263 Roundtrip, found 23 hours ago
$263
Roundtrip
found 23 hours ago
Select JetBlue Airways flight, departing Tue, Sep 23 from Philadelphia to Islip, returning Fri, Sep 26, priced at $263 found 23 hours ago
JetBlue Airways
Mon, Aug 25 - Fri, Sep 5
PHL
Philadelphia
ISP
Islip
$272 Roundtrip, found 6 days ago
$272
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Mon, Aug 25 from Philadelphia to Islip, returning Fri, Sep 5, priced at $272 found 6 days ago
JetBlue Airways
Sun, Sep 7 - Mon, Sep 15
PHL
Philadelphia
ISP
Islip
$273 Roundtrip, found 3 days ago
$273
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Sun, Sep 7 from Philadelphia to Islip, returning Mon, Sep 15, priced at $273 found 3 days ago
JetBlue Airways
Thu, Sep 25 - Sat, Sep 27
PHL
Philadelphia
ISP
Islip
$278 Roundtrip, found 23 hours ago
$278
Roundtrip
found 23 hours ago
Select JetBlue Airways flight, departing Thu, Sep 25 from Philadelphia to Islip, returning Sat, Sep 27, priced at $278 found 23 hours ago
JetBlue Airways
Mon, Aug 18 - Fri, Aug 29
PHL
Philadelphia
ISP
Islip
$298 Roundtrip, found 4 days ago
$298
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Mon, Aug 18 from Philadelphia to Islip, returning Fri, Aug 29, priced at $298 found 4 days ago
JetBlue Airways
Mon, Aug 18 - Wed, Aug 27
PHL
Philadelphia
ISP
Islip
$302 Roundtrip, found 4 days ago
$302
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Mon, Aug 18 from Philadelphia to Islip, returning Wed, Aug 27, priced at $302 found 4 days ago
JetBlue Airways
Fri, Sep 12 - Fri, Oct 3
PHL
Philadelphia
ISP
Islip
$303 Roundtrip, just found
$303
Roundtrip
just found
Select JetBlue Airways flight, departing Fri, Sep 12 from Philadelphia to Islip, returning Fri, Oct 3, priced at $303 just found
JetBlue Airways
Fri, Sep 12 - Sat, Sep 27
PHL
Philadelphia
ISP
Islip
$313 Roundtrip, just found
$313
Roundtrip
just found
Select JetBlue Airways flight, departing Fri, Sep 12 from Philadelphia to Islip, returning Sat, Sep 27, priced at $313 just found
Southwest Airlines
Thu, Sep 11 - Fri, Sep 26
PHL
Philadelphia
ISP
Islip
$373 Roundtrip, found 6 days ago
$373
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Thu, Sep 11 from Philadelphia to Islip, returning Fri, Sep 26, priced at $373 found 6 days ago

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $494
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $494
Flights from Philadelphia (PHL) to Islip (ISP)
Origin airport
Philadelphia Intl.
Destination airport
MacArthur
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$262
Distance
129 mi

Philadelphia to Islip Flights

The cheapest times to fly from Philadelphia to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Philadelphia to Islip are during the month of September. You can find some of the cheapest flights from Philadelphia to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to Islip

Sunday is one of the best days to book for cheap flights from Philadelphia to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Philadelphia to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Philadelphia to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $177 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Philadelphia to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Philadelphia to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP) cost?
Discover the latest flight deals from PHL to ISP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PHL to ISP?
The cheapest flights from PHL to ISP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PHL to ISP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PHL to ISP. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP)?
There are no daily direct flights from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from PHL to ISP?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from PHL to ISP?
With 81% of flights generally arriving on time, American Airlines has the best on-time performance for nonstop flights from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP). To keep track of your flight status and receive notifications about any changes, simply head to the Expedia App.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP)?
Book a flight from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP) that takes off before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Islip from Philadelphia Intl. Airport (PHL)?
If you're on a direct flight from Philadelphia Intl. Airport (PHL) to Islip, LaGuardia Airport (LGA) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP) last-minute?
Booking your flight from PHL to ISP right before your trip is usually more expensive. But if there's some wiggle room with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a PHL to ISP flight and hotel package?
You can save money by securing a PHL to ISP flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've selected your preferred flights and accommodations, consider adding extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP)?
If you reserved your PHL to ISP flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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Philadelphia nearby Airports

Atlantic City

Atlantic City Intl. to Islip
$681.11
*Available to One Key members.