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.

$136 Cheap Flights from Islip, New York to Philadelphia in 2026/27

Find the cheapest flights from Islip, New York to Philadelphia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:00 pm - 11:28 pmISP Islip Long Island-PHL Philadelphia

11h 28m1 stop Raleigh-Durham

4:16 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

18h 01m1 stop Raleigh-Durham

$263Multiple Airlines

Tue, Dec 1 - Sat, Dec 5

12:00 pm - 11:28 pmISP Islip Long Island-PHL Philadelphia

11h 28m1 stop Raleigh-Durham

4:16 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

18h 01m1 stop Raleigh-Durham

$264Multiple Airlines

Tue, Dec 1 - Sat, Dec 5

12:00 pm - 11:28 pmISP Islip Long Island-PHL Philadelphia

11h 28m1 stop Raleigh-Durham

4:31 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

17h 46m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham

$287Multiple Airlines

Tue, Dec 1 - Sat, Dec 5

12:00 pm - 11:28 pmISP Islip Long Island-PHL Philadelphia

11h 28m1 stop Raleigh-Durham

4:31 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

17h 46m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham

$288Multiple Airlines

Tue, Dec 1 - Sat, Dec 5

10:57 am - 4:24 pmISP Islip Long Island-PHL Philadelphia

5h 27m1 stop Raleigh-Durham

7:42 am - 11:20 amPHL Philadelphia-ISP Islip Long Island

27h 38m1 stop Raleigh-Durham

$369Multiple Airlines

Thu, Nov 12 - Mon, Nov 16

10:57 am - 4:24 pmISP Islip Long Island-PHL Philadelphia

5h 27m1 stop Raleigh-Durham

5:14 pm - 11:20 amPHL Philadelphia-ISP Islip Long Island

18h 06m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham

$399Multiple Airlines

Thu, Nov 12 - Mon, Nov 16

12:00 pm - 1:29 pmISP Islip Long Island-PHL Philadelphia

25h 29m1 stop Raleigh-Durham

7:25 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

14h 52m1 stop Raleigh-Durham

$402Multiple Airlines

Tue, Nov 10 - Sat, Nov 14

3:02 pm - 11:24 pmISP Islip Long Island-PHL Philadelphia

8h 22m1 stop Raleigh-Durham

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

25h 50m1 stop Raleigh-Durham

$403Multiple Airlines

Fri, Nov 13 - Tue, Nov 17

3:02 pm - 4:24 pmISP Islip Long Island-PHL Philadelphia

25h 22m1 stop Raleigh-Durham

5:14 pm - 11:20 amPHL Philadelphia-ISP Islip Long Island

18h 06m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham

$453Multiple Airlines

Fri, Nov 13 - Tue, Nov 17

12:00 pm - 7:21 amISP Islip Long Island-PHL Philadelphia

19h 21m2 stops Raleigh-Durham Atlanta Hartsfield-Jackson

7:25 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

14h 52m1 stop Raleigh-Durham

$481Multiple Airlines

Tue, Nov 10 - Sat, Nov 14

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Southwest flights from Islip, New York to Philadelphia

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

Southwest

Mar 5

ISP9:20 amIslip Long Island

8h 25m

1 stop

PHL5:45 pmPhiladelphia

Mar 7

PHL11:15 amPhiladelphia

7h 15m

1 stop

ISP6:30 pmIslip Long Island

$517

Southwest

Nov 28

ISP6:00 pmIslip Long Island

6h 20m

1 stop

PHL12:20 amPhiladelphia

Dec 5

PHL5:45 amPhiladelphia

9h 10m

2 stops

ISP2:55 pmIslip Long Island

$539

Southwest

Nov 28

ISP5:30 amIslip Long Island

7h 00m

2 stops

PHL12:30 pmPhiladelphia

Dec 5

PHL1:05 pmPhiladelphia

8h 40m

2 stops

ISP9:45 pmIslip Long Island

$619

Frontier flights from Islip, New York to Philadelphia

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

Frontier

Nov 23

ISP4:40 pmIslip Long Island

8h 13m

1 stop

PHL12:53 amPhiladelphia

Nov 30

PHL9:07 amPhiladelphia

6h 38m

1 stop

ISP3:45 pmIslip Long Island

$691

Frontier

Nov 25

ISP4:40 pmIslip Long Island

8h 13m

1 stop

PHL12:53 amPhiladelphia

Nov 30

PHL5:01 amPhiladelphia

10h 44m

1 stop

ISP3:45 pmIslip Long Island

$895

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 12/1

12:00 pm-11:28 pm

1 stop11h 28m

Philadelphia

Sat 12/5

4:16 pm-10:17 am

1 stop18h 01m

$263

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 12/1

12:00 pm-11:28 pm

1 stop11h 28m

Philadelphia

Sat 12/5

4:16 pm-10:17 am

1 stop18h 01m

$264

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 12/1

12:00 pm-11:28 pm

1 stop11h 28m

Philadelphia

Sat 12/5

4:31 pm-10:17 am

2 stops17h 46m

$287

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 12/1

12:00 pm-11:28 pm

1 stop11h 28m

Philadelphia

Sat 12/5

4:31 pm-10:17 am

2 stops17h 46m

$288

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 11/12

10:57 am-4:24 pm

1 stop5h 27m

Philadelphia

Mon 11/16

7:42 am-11:20 am

1 stop27h 38m

$369

Quickest round-trip

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 11/12

10:57 am-4:24 pm

1 stop5h 27m

Philadelphia

Mon 11/16

5:14 pm-11:20 am

2 stops18h 06m

$399

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 11/10

12:00 pm-1:29 pm

1 stop25h 29m

Philadelphia

Sat 11/14

7:25 pm-10:17 am

1 stop14h 52m

$402

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Fri 11/13

3:02 pm-11:24 pm

1 stop8h 22m

Philadelphia

Tue 11/17

9:30 am-11:20 am

1 stop25h 50m

$403

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Fri 11/13

3:02 pm-4:24 pm

1 stop25h 22m

Philadelphia

Tue 11/17

5:14 pm-11:20 am

2 stops18h 06m

$453

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Tue 11/10

12:00 pm-7:21 am

2 stops19h 21m

Philadelphia

Sat 11/14

7:25 pm-10:17 am

1 stop14h 52m

$481

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

Southwest is the most popular carrier 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	$136
Fastest flight time	5h 27m
Direct flights	None

The best one-way flight to Philadelphia from Islip, New York in the past 72 hours is $136. The best round-trip flight deal from Islip, New York to Philadelphia found on momondo in the last 72 hours is $263.

The fastest flight from Islip, New York to Philadelphia takes 5h 27m

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. 5h 27m 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.