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Cheap flights from Philadelphia to New York from $138

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to New York departing on 9/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Philadelphia to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:16 pm - 9:53 amPHL  Philadelphia-ISP Islip Long Island
12h 37m1 stop Orlando
Multiple Airlines Logo
5:27 pm - 1:35 pmISP  Islip Long Island-PHL Philadelphia
20h 08m1 stop Raleigh-Durham
$231Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
Multiple Airlines Logo
7:15 am - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
9h 43m1 stop Orlando
Multiple Airlines Logo
12:00 pm - 8:41 amISP  Islip Long Island-PHL Philadelphia
20h 41m2 stops Raleigh-Durham Tampa
$231Multiple Airlines
Wed, Sep 9 - Wed, Sep 16
Frontier Logo
7:15 am - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
9h 43m1 stop Orlando
Frontier Logo
5:43 pm - 9:05 amISP  Islip Long Island-PHL Philadelphia
15h 22m1 stop Orlando
$235Frontier
Wed, Sep 9 - Wed, Sep 16
Multiple Airlines Logo
5:45 pm - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
23h 13m1 stop Orlando
Multiple Airlines Logo
12:00 pm - 8:41 amISP  Islip Long Island-PHL Philadelphia
20h 41m2 stops Raleigh-Durham Tampa
$236Multiple Airlines
Thu, Sep 10 - Wed, Sep 16
Frontier Logo
5:45 pm - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
23h 13m1 stop Orlando
Frontier Logo
5:43 pm - 9:05 amISP  Islip Long Island-PHL Philadelphia
15h 22m1 stop Orlando
$241Frontier
Thu, Sep 10 - Wed, Sep 16
Multiple Airlines Logo
5:15 am - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
11h 43m1 stop Orlando
Multiple Airlines Logo
12:00 pm - 12:09 amISP  Islip Long Island-PHL Philadelphia
12h 09m2 stops Raleigh-Durham Orlando
$241Multiple Airlines
Sun, Sep 13 - Tue, Sep 15
Multiple Airlines Logo
1:00 pm - 9:53 amPHL  Philadelphia-ISP Islip Long Island
20h 53m1 stop Orlando
Multiple Airlines Logo
12:00 pm - 4:27 pmISP  Islip Long Island-PHL Philadelphia
4h 27m1 stop Raleigh-Durham
$249Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
Frontier Logo
7:20 am - 9:53 amPHL  Philadelphia-ISP Islip Long Island
26h 33m1 stop Orlando
Frontier Logo
10:57 am - 9:40 amISP  Islip Long Island-PHL Philadelphia
22h 43m1 stop Orlando
$261Frontier
Sun, Aug 30 - Wed, Sep 2
Multiple Airlines Logo
9:16 pm - 9:53 amPHL  Philadelphia-ISP Islip Long Island
12h 37m1 stop Orlando
Multiple Airlines Logo
5:27 pm - 9:30 amISP  Islip Long Island-PHL Philadelphia
16h 03m2 stops Raleigh-Durham Orlando
$271Multiple Airlines
Tue, Sep 1 - Tue, Sep 8
Multiple Airlines Logo
7:20 am - 9:53 amPHL  Philadelphia-ISP Islip Long Island
26h 33m1 stop Orlando
Multiple Airlines Logo
11:57 am - 9:40 amISP  Islip Long Island-PHL Philadelphia
21h 43m2 stops Raleigh-Durham Orlando
$272Multiple Airlines
Sun, Aug 30 - Wed, Sep 2

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Frontier flights from Philadelphia to Islip, New York

Our best Frontier deals on Philadelphia to Islip, New York flight tickets
Frontier
Sep 9
PHL7:15 amPhiladelphia
9h 43m
1 stop
ISP4:58 pmIslip Long Island
Sep 16
ISP5:43 pmIslip Long Island
15h 22m
1 stop
PHL9:05 amPhiladelphia
$235
Frontier
Sep 10
PHL5:45 pmPhiladelphia
23h 13m
1 stop
ISP4:58 pmIslip Long Island
Sep 16
ISP5:43 pmIslip Long Island
15h 22m
1 stop
PHL9:05 amPhiladelphia
$241
Frontier
Aug 30
PHL7:20 amPhiladelphia
26h 33m
1 stop
ISP9:53 amIslip Long Island
Sep 2
ISP10:57 amIslip Long Island
22h 43m
1 stop
PHL9:40 amPhiladelphia
$261

Southwest flights from Philadelphia to Islip, New York

Our best Southwest deals on Philadelphia to Islip, New York flight tickets
Southwest
Sep 10
PHL12:45 pmPhiladelphia
9h 25m
2 stops
ISP10:10 pmIslip Long Island
Sep 16
ISP6:05 amIslip Long Island
8h 15m
2 stops
PHL2:20 pmPhiladelphia
$306
Southwest
Aug 29
PHL11:55 amPhiladelphia
8h 50m
2 stops
ISP8:45 pmIslip Long Island
Sep 1
ISP12:55 pmIslip Long Island
8h 50m
2 stops
PHL9:45 pmPhiladelphia
$374
Southwest
Sep 6
PHL3:25 pmPhiladelphia
7h 20m
2 stops
ISP10:45 pmIslip Long Island
Sep 12
ISP5:30 amIslip Long Island
9h 10m
2 stops
PHL2:40 pmPhiladelphia
$409

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Islip, New York that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 12, 2026.
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

Cheapest round-trip

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Tue 9/1

9:16 pm-9:53 am

1 stop12h 37m

Islip Long Island

Tue 9/8

5:27 pm-1:35 pm

1 stop20h 08m

$231

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Wed 9/9

7:15 am-4:58 pm

1 stop9h 43m

Islip Long Island

Wed 9/16

12:00 pm-8:41 am

2 stops20h 41m

$231

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Wed 9/9

7:15 am-4:58 pm

1 stop9h 43m

Islip Long Island

Wed 9/16

5:43 pm-9:05 am

1 stop15h 22m

$235

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Thu 9/10

5:45 pm-4:58 pm

1 stop23h 13m

Islip Long Island

Wed 9/16

12:00 pm-8:41 am

2 stops20h 41m

$236

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Thu 9/10

5:45 pm-4:58 pm

1 stop23h 13m

Islip Long Island

Wed 9/16

5:43 pm-9:05 am

1 stop15h 22m

$241
Quickest round-trip

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Sun 9/13

5:15 am-4:58 pm

1 stop11h 43m

Islip Long Island

Tue 9/15

12:00 pm-12:09 am

2 stops12h 09m

$241

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Sun 9/6

1:00 pm-9:53 am

1 stop20h 53m

Islip Long Island

Sat 9/12

12:00 pm-4:27 pm

1 stop4h 27m

$249

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Sun 8/30

7:20 am-9:53 am

1 stop26h 33m

Islip Long Island

Wed 9/2

10:57 am-9:40 am

1 stop22h 43m

$261

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Tue 9/1

9:16 pm-9:53 am

1 stop12h 37m

Islip Long Island

Tue 9/8

5:27 pm-9:30 am

2 stops16h 03m

$271

PhiladelphiaIslip

PHL Philadelphia - ISP Islip Long Island

PHLISP

Philadelphia

Sun 8/30

7:20 am-9:53 am

1 stop26h 33m

Islip Long Island

Wed 9/2

11:57 am-9:40 am

2 stops21h 43m

$272

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to New York from

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

6h 03m

Direct flights

None
The fastest flight from Philadelphia to Islip, New York takes 6h 03m
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

Frequently asked questions about flying from Philadelphia to Islip, New York

  • How far is Philadelphia to Islip Long Island by plane?

    There are 115.4 mi between Philadelphia and Islip Long Island. 6h 03m 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.

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
Montauk
Riverhead
Southampton
Sag Harbor
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.

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