$174 Cheap Flights from Islip (ISP) to Philadelphia (PHL)

View $174 flight on Sat, May 30, 2026Opens in a new window

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

Cheap Flights from Islip to Philadelphia (ISP-PHL)

Prices were available within the past 7 days and start at $174 for one-way flights and $352 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Mon, May 18 - Wed, May 20
ISP
Islip
PHL
Philadelphia
$352 Roundtrip, found 12 hours ago
$352
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Mon, May 18 from Islip to Philadelphia, returning Wed, May 20, priced at $352 found 12 hours ago
Southwest Airlines
Mon, May 18 - Wed, May 20
ISP
Islip
PHL
Philadelphia
$357 Roundtrip, found 12 hours ago
$357
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Mon, May 18 from Islip to Philadelphia, returning Wed, May 20, priced at $357 found 12 hours ago
Southwest Airlines
Mon, May 18 - Wed, May 20
ISP
Islip
PHL
Philadelphia
$362 Roundtrip, found 12 hours ago
$362
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Mon, May 18 from Islip to Philadelphia, returning Wed, May 20, priced at $362 found 12 hours ago
Southwest Airlines
Sat, May 30 - Sun, May 31
ISP
Islip
PHL
Philadelphia
$373 Roundtrip, found 2 days ago
$373
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sat, May 30 from Islip to Philadelphia, returning Sun, May 31, priced at $373 found 2 days ago
Southwest Airlines
Sat, May 30 - Sun, May 31
ISP
Islip
PHL
Philadelphia
$383 Roundtrip, found 2 days ago
$383
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sat, May 30 from Islip to Philadelphia, returning Sun, May 31, priced at $383 found 2 days ago
Southwest Airlines
Mon, May 18 - Wed, May 20
ISP
Islip
PHL
Philadelphia
$387 Roundtrip, found 12 hours ago
$387
Roundtrip
found 12 hours ago
Select Southwest Airlines flight, departing Mon, May 18 from Islip to Philadelphia, returning Wed, May 20, priced at $387 found 12 hours ago
Southwest Airlines
Tue, Jul 14 - Thu, Jul 16
ISP
Islip
PHL
Philadelphia
$393 Roundtrip, found 3 days ago
$393
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Tue, Jul 14 from Islip to Philadelphia, returning Thu, Jul 16, priced at $393 found 3 days ago
Southwest Airlines
Sat, May 30 - Sun, May 31
ISP
Islip
PHL
Philadelphia
$393 Roundtrip, found 2 days ago
$393
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Sat, May 30 from Islip to Philadelphia, returning Sun, May 31, priced at $393 found 2 days ago
Southwest Airlines
Fri, May 15 - Sun, May 17
ISP
Islip
PHL
Philadelphia
$403 Roundtrip, found 3 days ago
$403
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Fri, May 15 from Islip to Philadelphia, returning Sun, May 17, priced at $403 found 3 days ago
JetBlue Airways
Tue, Jul 14 - Thu, Jul 16
ISP
Islip
PHL
Philadelphia
$513 Roundtrip, found 3 days ago
$513
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Tue, Jul 14 from Islip to Philadelphia, returning Thu, Jul 16, priced at $513 found 3 days ago

Alternative airports near Philadelphia

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

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $423
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $423

Frequently asked questions

How much does a flight from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) cost?
You can find cheap one-way flights from $174 and cheap return flights from $352 ISP to PHL with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when ISP to PHL ticket fares go up or down.
What is the cheapest month to fly from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The cheapest month to fly from ISP to PHL is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Enter ISP to PHL and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
JetBlue Airways is the carrier that flies from Islip, NY (ISP) to Philadelphia, PA (PHL). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
To find a cheap flight from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from ISP to PHL. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Flying from ISP to PHL with a connection usually takes about 5 hours 20 minutes, traveling roughly 129 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
Select the "Business class" and "First class" filters when looking for ISP to PHL flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) flight with Expedia?
It's easy to earn miles on a Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) at the last minute?
Typically, booking a last minute flight from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) flight and hotel package?
Securing a Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) Philadelphia Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.)?
If you booked your Islip, NY (ISP-MacArthur) to Philadelphia, PA (PHL-Philadelphia Intl.) flight within 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 beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
MacArthur
Destination airport
Philadelphia Intl.
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$352
Distance
129 mi

*Flight schedules are subject to change.

*Available to One Key members.

 

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