$157 Cheap Flights from Philadelphia (PHL) to Islip (ISP)

View $157 flight on Tue, Oct 21, 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 $157 for one-way flights and $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, Oct 7 - Mon, Oct 27
PHL
Philadelphia
ISP
Islip
$283 Roundtrip, found 21 hours ago
$283
Roundtrip
found 21 hours ago
Select JetBlue Airways flight, departing Tue, Oct 7 from Philadelphia to Islip, returning Mon, Oct 27, priced at $283 found 21 hours ago
JetBlue Airways
Tue, Oct 28 - Wed, Nov 5
PHL
Philadelphia
ISP
Islip
$287 Roundtrip, found 5 days ago
$287
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Tue, Oct 28 from Philadelphia to Islip, returning Wed, Nov 5, priced at $287 found 5 days ago
JetBlue Airways
Tue, Oct 7 - Sat, Oct 18
PHL
Philadelphia
ISP
Islip
$293 Roundtrip, found 21 hours ago
$293
Roundtrip
found 21 hours ago
Select JetBlue Airways flight, departing Tue, Oct 7 from Philadelphia to Islip, returning Sat, Oct 18, priced at $293 found 21 hours ago
JetBlue Airways
Tue, Nov 4 - Wed, Nov 19
PHL
Philadelphia
ISP
Islip
$299 Roundtrip, found 3 days ago
$299
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Tue, Nov 4 from Philadelphia to Islip, returning Wed, Nov 19, priced at $299 found 3 days ago
JetBlue Airways
Wed, Dec 3 - Sun, Dec 14
PHL
Philadelphia
ISP
Islip
$303 Roundtrip, found 3 days ago
$303
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Wed, Dec 3 from Philadelphia to Islip, returning Sun, Dec 14, priced at $303 found 3 days ago
JetBlue Airways
Thu, Oct 9 - Mon, Oct 27
PHL
Philadelphia
ISP
Islip
$308 Roundtrip, found 21 hours ago
$308
Roundtrip
found 21 hours ago
Select JetBlue Airways flight, departing Thu, Oct 9 from Philadelphia to Islip, returning Mon, Oct 27, priced at $308 found 21 hours ago
JetBlue Airways
Tue, Oct 7 - Fri, Oct 24
PHL
Philadelphia
ISP
Islip
$309 Roundtrip, found 21 hours ago
$309
Roundtrip
found 21 hours ago
Select JetBlue Airways flight, departing Tue, Oct 7 from Philadelphia to Islip, returning Fri, Oct 24, priced at $309 found 21 hours ago
JetBlue Airways
Mon, Oct 27 - Wed, Nov 5
PHL
Philadelphia
ISP
Islip
$310 Roundtrip, found 5 days ago
$310
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Mon, Oct 27 from Philadelphia to Islip, returning Wed, Nov 5, priced at $310 found 5 days ago
JetBlue Airways
Fri, Oct 10 - Mon, Oct 27
PHL
Philadelphia
ISP
Islip
$313 Roundtrip, found 21 hours ago
$313
Roundtrip
found 21 hours ago
Select JetBlue Airways flight, departing Fri, Oct 10 from Philadelphia to Islip, returning Mon, Oct 27, priced at $313 found 21 hours ago
Southwest Airlines
Sat, Sep 27 - Sat, Oct 11
PHL
Philadelphia
ISP
Islip
$577 Roundtrip, found 11 hours ago
$577
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Sat, Sep 27 from Philadelphia to Islip, returning Sat, Oct 11, priced at $577 found 11 hours ago

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP) cost?
Grab a cheap one-way flight from $157 or cheap return flight from $283 from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP)?
October is the least expensive month to fly from PHL to ISP. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to MacArthur Airport (ISP)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest PHL to ISP flight.
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.

Travel information

Travel information

Origin airport
Philadelphia Intl.
Destination airport
MacArthur
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$283
Distance
129 mi

Book with confidence

Book with confidence

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 October. 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 $157 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.

 

Philadelphia to Islip Flights

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*Available to One Key members.