When did momondo last update prices for flights from Philadelphia Airport to Islip Long Island Airport?

Prices for flights from Philadelphia Airport to Islip Long Island Airport refresh daily.

How old do you have to be to fly from Philadelphia Airport to Islip Long Island Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Islip Long Island Airport.

What documentation or ID do you need to fly to Islip Long Island Airport?

The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$194 Cheap Flights from Philadelphia to Islip in 2025/26

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0 bags

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Find the cheapest flights from Philadelphia to New York

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:00 pm - 1:09 pm

PHL

ISP

15h 09m1 stop

8:35 pm - 8:37 am

ISP

PHL

12h 02m1 stop

$457Frontier

Sat, Dec 20 - Mon, Dec 22

1:37 pm - 1:09 pm

PHL

ISP

23h 32m2 stops

8:35 pm - 8:37 am

ISP

PHL

12h 02m1 stop

$469Frontier

Sat, Dec 20 - Mon, Dec 22

7:42 pm - 10:17 pm

PHL

ISP

26h 35m2 stops

7:30 pm - 8:37 am

ISP

PHL

13h 07m1 stop

$513Frontier

Tue, Dec 30 - Sat, Jan 3

10:00 pm - 1:09 pm

PHL

ISP

15h 09m1 stop

4:40 pm - 9:07 am

ISP

PHL

16h 27m1 stop

$525Multiple Airlines

Sun, Dec 28 - Mon, Dec 29

5:25 am - 1:09 pm

PHL

ISP

7h 44m1 stop

8:35 pm - 10:58 pm

ISP

PHL

26h 23m2 stops

$603Multiple Airlines

Sun, Dec 28 - Mon, Dec 29

8:54 pm - 4:10 pm

PHL

ISP

19h 16m2 stops

7:25 am - 11:56 pm

ISP

PHL

16h 31m2 stops

$1,218Multiple Airlines

Tue, Dec 30 - Sat, Jan 3

Frontier flights from Philadelphia to Islip, New York

Our best Frontier deals on Philadelphia to Islip, New York flight tickets

Frontier

Dec 19

PHL10:00 amPhiladelphia

9h 40m

1 stop

ISP7:40 pmIslip Long Island

Dec 21

ISP8:35 pmIslip Long Island

12h 02m

1 stop

PHL8:37 amPhiladelphia

$410

Find similar

Frontier

Dec 19

PHL10:00 amPhiladelphia

9h 40m

1 stop

ISP7:40 pmIslip Long Island

Dec 21

ISP8:35 pmIslip Long Island

28h 06m

2 stops

PHL12:41 amPhiladelphia

$440

Find similar

Frontier

Dec 20

PHL10:00 pmPhiladelphia

15h 09m

1 stop

ISP1:09 pmIslip Long Island

Dec 22

ISP8:35 pmIslip Long Island

12h 02m

1 stop

PHL8:37 amPhiladelphia

$457

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Philadelphia to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 12/20

10:00 pm-1:09 pm

1 stop15h 09m

Islip Long Island

Mon 12/22

8:35 pm-8:37 am

1 stop12h 02m

$457

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 12/20

1:37 pm-1:09 pm

2 stops23h 32m

Islip Long Island

Mon 12/22

8:35 pm-8:37 am

1 stop12h 02m

$469

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 12/30

7:42 pm-10:17 pm

2 stops26h 35m

Islip Long Island

Sat 1/3

7:30 pm-8:37 am

1 stop13h 07m

$513

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 12/28

10:00 pm-1:09 pm

1 stop15h 09m

Islip Long Island

Mon 12/29

4:40 pm-9:07 am

1 stop16h 27m

$525

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 12/28

5:25 am-1:09 pm

1 stop7h 44m

Islip Long Island

Mon 12/29

8:35 pm-10:58 pm

2 stops26h 23m

$603

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 12/30

8:54 pm-4:10 pm

2 stops19h 16m

Islip Long Island

Sat 1/3

7:25 am-11:56 pm

2 stops16h 31m

$1,218

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Wed 12/24

8:30 am-3:10 pm

1 stop30h 40m

$194

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Wed 12/24

6:00 am-11:25 am

2 stops29h 25m

$217

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Wed 12/24

6:00 am-11:00 am

3 stops29h 00m

$263

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Philadelphia to Islip, New York

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Philadelphia to Islip Long Island?

Frontier is the most popular carrier operating from Philadelphia to Islip Long Island

When to book flights from Philadelphia to Islip, New York

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Islip, New York according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Philadelphia to Islip, New York (PHL to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Islip, New York

Fastest flight time	15h 09m
Direct flights	None

The fastest flight from Philadelphia to Islip, New York takes 15h 09m

There are no direct flights from Philadelphia to Islip, New York. There are no popular flight routes from Philadelphia to Islip, New York.

Search flight deals

How far is Philadelphia to Islip Long Island by plane?
There are 115.4 mi between Philadelphia and Islip Long Island. 15h 09m is a normal flight duration for this route.
When did momondo last update prices for flights from Philadelphia Airport to Islip Long Island Airport?
Prices for flights from Philadelphia Airport to Islip Long Island Airport refresh daily.
How old do you have to be to fly from Philadelphia Airport to Islip Long Island Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Islip Long Island Airport.
What documentation or ID do you need to fly to Islip Long Island Airport?
The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Montauk

Riverhead

Sag Harbor

Southampton

Amagansett

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Islip?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Philadelphia to Islip for you.

Can I find flights from Philadelphia to Islip with flexible booking policies on momondo?

Flights from Philadelphia to Islip with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Philadelphia to Islip?

Once you have performed a search for Philadelphia to Islip flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Philadelphia to Islip right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Philadelphia to Islip now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Islip and let you know when they change.