How do I get Price Alerts for flights from Philadelphia to Islip, New York?

Search flight deals from Philadelphia to Islip, New York . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from Philadelphia to Islip, New York with momondo?

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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.

$177 Cheap Flights from Philadelphia to Islip in 2025/26

1 adult

0 bags

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Find the cheapest flights from Philadelphia to New York

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Enter your travel dates to find the best prices.

3:56 pm - 7:08 pm

PHL

ISP

27h 12m1 stop

8:00 am - 5:43 pm

ISP

PHL

9h 43m1 stop

$177Frontier

Fri, Jan 9 - Tue, Jan 13

3:56 pm - 7:08 pm

PHL

ISP

27h 12m1 stop

8:00 am - 12:52 am

ISP

PHL

16h 52m2 stops

$206Frontier

Fri, Jan 9 - Tue, Jan 13

12:16 pm - 11:59 pm

PHL

ISP

11h 43m1 stop

7:53 pm - 10:26 am

ISP

PHL

14h 33m1 stop

$223Frontier

Sun, Jan 18 - Sun, Jan 25

12:16 pm - 11:59 pm

PHL

ISP

11h 43m1 stop

9:25 am - 12:25 am

ISP

PHL

15h 00m2 stops

$248Multiple Airlines

Sun, Jan 18 - Sun, Jan 25

Frontier flights from Philadelphia to Islip, New York

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

Frontier

Jan 9

PHL3:56 pmPhiladelphia

27h 12m

1 stop

ISP7:08 pmIslip Long Island

Jan 13

ISP8:00 amIslip Long Island

9h 43m

1 stop

PHL5:43 pmPhiladelphia

$177

Find similar

Frontier

Jan 9

PHL3:56 pmPhiladelphia

27h 12m

1 stop

ISP7:08 pmIslip Long Island

Jan 13

ISP8:00 amIslip Long Island

16h 52m

2 stops

PHL12:52 amPhiladelphia

$206

Find similar

Frontier

Jan 18

PHL12:16 pmPhiladelphia

11h 43m

1 stop

ISP11:59 pmIslip Long Island

Jan 25

ISP7:53 pmIslip Long Island

14h 33m

1 stop

PHL10:26 amPhiladelphia

$223

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

Fri 1/9

3:56 pm-7:08 pm

1 stop27h 12m

Islip Long Island

Tue 1/13

8:00 am-5:43 pm

1 stop9h 43m

$177

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 1/9

3:56 pm-7:08 pm

1 stop27h 12m

Islip Long Island

Tue 1/13

8:00 am-12:52 am

2 stops16h 52m

$206

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 1/18

12:16 pm-11:59 pm

1 stop11h 43m

Islip Long Island

Sun 1/25

7:53 pm-10:26 am

1 stop14h 33m

$223

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 1/18

12:16 pm-11:59 pm

1 stop11h 43m

Islip Long Island

Sun 1/25

9:25 am-12:25 am

2 stops15h 00m

$248

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 1/4

8:05 pm-1:45 pm

1 stop17h 40m

$191

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 1/4

12:40 pm-8:07 pm

2 stops31h 27m

$247

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sun 1/4

9:18 am-1:45 pm

3 stops28h 27m

$314

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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	18h 27m
Direct flights	None

The fastest flight from Philadelphia to Islip, New York takes 18h 27m

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. 18h 27m 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.

How do I get Price Alerts for flights from Philadelphia to Islip, New York?
Search flight deals from Philadelphia to Islip, New York. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from Philadelphia to Islip, New York with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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.