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

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

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Philadelphia Airport.

What documentation or ID do you need to fly to Philadelphia Airport?

The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$214 Cheap Flights from Islip, New York to Philadelphia in 2026

Find the cheapest flights from Islip, New York to Philadelphia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:00 pm - 1:35 pmISP Islip Long Island-PHL Philadelphia

25h 35m1 stop Raleigh-Durham

12:40 pm - 4:58 pmPHL Philadelphia-ISP Islip Long Island

28h 18m2 stops Atlanta Hartsfield-Jackson Orlando

$214Multiple Airlines

Tue, Sep 29 - Tue, Oct 6

12:00 pm - 1:35 pmISP Islip Long Island-PHL Philadelphia

25h 35m1 stop Raleigh-Durham

9:30 am - 11:20 amPHL Philadelphia-ISP Islip Long Island

25h 50m1 stop Raleigh-Durham

$225Multiple Airlines

Tue, Sep 29 - Tue, Oct 6

5:43 pm - 9:30 amISP Islip Long Island-PHL Philadelphia

15h 47m1 stop Orlando

12:40 pm - 4:58 pmPHL Philadelphia-ISP Islip Long Island

28h 18m2 stops Atlanta Hartsfield-Jackson Orlando

$255Frontier

Mon, Sep 28 - Mon, Oct 5

5:43 pm - 9:30 amISP Islip Long Island-PHL Philadelphia

15h 47m1 stop Orlando

5:45 pm - 4:58 pmPHL Philadelphia-ISP Islip Long Island

23h 13m1 stop Orlando

$262Frontier

Mon, Sep 28 - Mon, Oct 5

5:43 pm - 9:05 amISP Islip Long Island-PHL Philadelphia

15h 22m1 stop Orlando

5:45 pm - 4:58 pmPHL Philadelphia-ISP Islip Long Island

23h 13m1 stop Orlando

$298Frontier

Sat, Sep 12 - Wed, Sep 16

6:48 pm - 6:14 pmISP Islip Long Island-PHL Philadelphia

23h 26m2 stops Tampa Atlanta Hartsfield-Jackson

5:45 pm - 4:58 pmPHL Philadelphia-ISP Islip Long Island

23h 13m1 stop Orlando

$313Frontier

Fri, Sep 25 - Fri, Oct 2

5:43 pm - 9:05 amISP Islip Long Island-PHL Philadelphia

15h 22m1 stop Orlando

5:45 pm - 4:58 pmPHL Philadelphia-ISP Islip Long Island

23h 13m1 stop Orlando

$316Frontier

Fri, Sep 25 - Fri, Oct 2

5:43 pm - 6:31 pmISP Islip Long Island-PHL Philadelphia

24h 48m1 stop Orlando

5:15 am - 4:58 pmPHL Philadelphia-ISP Islip Long Island

11h 43m1 stop Orlando

$334Frontier

Thu, Sep 10 - Mon, Sep 14

5:43 pm - 9:05 amISP Islip Long Island-PHL Philadelphia

15h 22m1 stop Orlando

5:45 pm - 12:58 pmPHL Philadelphia-ISP Islip Long Island

19h 13m2 stops Orlando Wilmington New Hanover County

$334Multiple Airlines

Thu, Sep 10 - Mon, Sep 14

5:43 pm - 9:30 amISP Islip Long Island-PHL Philadelphia

15h 47m1 stop Orlando

7:15 am - 4:58 pmPHL Philadelphia-ISP Islip Long Island

9h 43m1 stop Orlando

$335Frontier

Tue, Sep 15 - Sat, Sep 19

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Frontier flights from Islip, New York to Philadelphia

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

Frontier

Sep 28

ISP5:43 pmIslip Long Island

15h 47m

1 stop

PHL9:30 amPhiladelphia

Oct 5

PHL12:40 pmPhiladelphia

28h 18m

2 stops

ISP4:58 pmIslip Long Island

$255

Frontier

Sep 28

ISP5:43 pmIslip Long Island

15h 47m

1 stop

PHL9:30 amPhiladelphia

Oct 5

PHL5:45 pmPhiladelphia

23h 13m

1 stop

ISP4:58 pmIslip Long Island

$262

Frontier

Sep 12

ISP5:43 pmIslip Long Island

15h 22m

1 stop

PHL9:05 amPhiladelphia

Sep 16

PHL5:45 pmPhiladelphia

23h 13m

1 stop

ISP4:58 pmIslip Long Island

$298

Southwest flights from Islip, New York to Philadelphia

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

Southwest

Sep 28

ISP12:35 pmIslip Long Island

9h 10m

2 stops

PHL9:45 pmPhiladelphia

Oct 5

PHL3:20 pmPhiladelphia

8h 20m

2 stops

ISP11:40 pmIslip Long Island

$427

Southwest

Sep 10

ISP12:35 pmIslip Long Island

9h 10m

2 stops

PHL9:45 pmPhiladelphia

Sep 14

PHL12:45 pmPhiladelphia

9h 25m

2 stops

ISP10:10 pmIslip Long Island

$479

Southwest

Sep 4

ISP12:35 pmIslip Long Island

9h 10m

2 stops

PHL9:45 pmPhiladelphia

Sep 6

PHL3:25 pmPhiladelphia

7h 20m

2 stops

ISP10:45 pmIslip Long Island

$657

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 9/29

12:00 pm-1:35 pm

1 stop25h 35m

Philadelphia

Tue 10/6

12:40 pm-4:58 pm

2 stops28h 18m

$214

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 9/29

12:00 pm-1:35 pm

1 stop25h 35m

Philadelphia

Tue 10/6

9:30 am-11:20 am

1 stop25h 50m

$225

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Mon 9/28

5:43 pm-9:30 am

1 stop15h 47m

Philadelphia

Mon 10/5

12:40 pm-4:58 pm

2 stops28h 18m

$255

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Mon 9/28

5:43 pm-9:30 am

1 stop15h 47m

Philadelphia

Mon 10/5

5:45 pm-4:58 pm

1 stop23h 13m

$262

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Sat 9/12

5:43 pm-9:05 am

1 stop15h 22m

Philadelphia

Wed 9/16

5:45 pm-4:58 pm

1 stop23h 13m

$298

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Fri 9/25

6:48 pm-6:14 pm

2 stops23h 26m

Philadelphia

Fri 10/2

5:45 pm-4:58 pm

1 stop23h 13m

$313

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Fri 9/25

5:43 pm-9:05 am

1 stop15h 22m

Philadelphia

Fri 10/2

5:45 pm-4:58 pm

1 stop23h 13m

$316

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 9/10

5:43 pm-6:31 pm

1 stop24h 48m

Philadelphia

Mon 9/14

5:15 am-4:58 pm

1 stop11h 43m

$334

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 9/10

5:43 pm-9:05 am

1 stop15h 22m

Philadelphia

Mon 9/14

5:45 pm-12:58 pm

2 stops19h 13m

$334

Quickest round-trip

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 9/15

5:43 pm-9:30 am

1 stop15h 47m

Philadelphia

Sat 9/19

7:15 am-4:58 pm

1 stop9h 43m

$335

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

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

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 Islip Long Island to Philadelphia?

Frontier, Southwest, and JetBlue are the most popular carriers operating from Islip Long Island to Philadelphia

When to book flights from Islip, New York to Philadelphia

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

Estimated round-trip price

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

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

Best Price Found	$269
Fastest flight time	13h 02m
Direct flights	None

The best one-way flight to Philadelphia from Islip, New York in the past 72 hours is $269. The best round-trip flight deal from Islip, New York to Philadelphia found on momondo in the last 72 hours is $214.

The fastest flight from Islip, New York to Philadelphia takes 13h 02m

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

Search flight deals

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

How far is Islip Long Island to Philadelphia by plane?
There are 115.4 mi between Islip Long Island and Philadelphia. 13h 02m is a normal flight duration for this route.
When did momondo last update prices for flights from Islip Long Island Airport to Philadelphia Airport?
Prices for flights from Islip Long Island Airport to Philadelphia Airport are updated daily.
How old do you have to be to fly from Islip Long Island Airport to Philadelphia Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The required travel and health documents for your Philadelphia Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Why use momondo?

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

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 Islip to Philadelphia for you.

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

All flight searches from Islip to Philadelphia on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Islip to Philadelphia 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 Islip to Philadelphia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Philadelphia from Islip. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.