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.

$133 Cheap Flights from Islip to Philadelphia in 2025/26

1 adult

0 bags

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Find the cheapest flights from Islip, New York to Philadelphia

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11:55 am - 1:33 pm

ISP

PHL

25h 38m2 stops

8:43 pm - 6:48 pm

PHL

ISP

22h 05m1 stop

$133Multiple Airlines

Thu, Jan 22 - Wed, Jan 28

7:43 pm - 7:48 pm

ISP

PHL

24h 05m1 stop

8:43 pm - 6:48 pm

PHL

ISP

22h 05m1 stop

$142Multiple Airlines

Thu, Jan 22 - Wed, Jan 28

12:35 pm - 11:15 pm

ISP

PHL

10h 40m1 stop

6:00 am - 11:17 am

PHL

ISP

5h 17m1 stop

$350Multiple Airlines

Wed, Apr 1 - Sat, Apr 4

12:35 pm - 8:39 am

ISP

PHL

20h 04m2 stops

10:00 pm - 8:41 am

PHL

ISP

10h 41m1 stop

$408Multiple Airlines

Wed, Apr 1 - Sat, Apr 4

9:22 am - 8:39 am

ISP

PHL

23h 17m2 stops

5:00 am - 11:05 am

PHL

ISP

30h 05m3 stops

$687Multiple Airlines

Wed, Apr 1 - Sat, Apr 4

9:22 am - 11:58 pm

ISP

PHL

14h 36m3 stops

5:00 am - 11:05 am

PHL

ISP

30h 05m3 stops

$716Multiple Airlines

Wed, Apr 1 - Sat, Apr 4

9:22 am - 8:39 am

ISP

PHL

23h 17m2 stops

8:19 am - 11:05 am

PHL

ISP

26h 46m2 stops

$722Multiple Airlines

Wed, Apr 1 - Sat, Apr 4

Frontier flights from Islip, New York to Philadelphia

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

Frontier

Dec 8

ISP10:19 amIslip Long Island

23h 28m

2 stops

PHL9:47 amPhiladelphia

Dec 9

PHL10:00 pmPhiladelphia

24h 44m

1 stop

ISP10:44 pmIslip Long Island

$379

Find similar

Frontier

Dec 6

ISP10:19 amIslip Long Island

14h 21m

1 stop

PHL12:40 amPhiladelphia

Dec 8

PHL2:06 pmPhiladelphia

29h 28m

1 stop

ISP7:34 pmIslip Long Island

$431

Find similar

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

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 1/22

11:55 am-1:33 pm

2 stops25h 38m

Philadelphia

Wed 1/28

8:43 pm-6:48 pm

1 stop22h 05m

$133

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 1/22

7:43 pm-7:48 pm

1 stop24h 05m

Philadelphia

Wed 1/28

8:43 pm-6:48 pm

1 stop22h 05m

$142

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/1

12:35 pm-11:15 pm

1 stop10h 40m

Philadelphia

Sat 4/4

6:00 am-11:17 am

1 stop5h 17m

$350

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/1

12:35 pm-8:39 am

2 stops20h 04m

Philadelphia

Sat 4/4

10:00 pm-8:41 am

1 stop10h 41m

$408

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/1

9:22 am-8:39 am

2 stops23h 17m

Philadelphia

Sat 4/4

5:00 am-11:05 am

3 stops30h 05m

$687

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/1

9:22 am-11:58 pm

3 stops14h 36m

Philadelphia

Sat 4/4

5:00 am-11:05 am

3 stops30h 05m

$716

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/1

9:22 am-8:39 am

2 stops23h 17m

Philadelphia

Sat 4/4

8:19 am-11:05 am

2 stops26h 46m

$722

Flights are sorted by cheapest round-trip flights first.

Sorted 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 day to depart on your flight to Philadelphia?

The cheapest day to depart from Islip, New York to Philadelphia is on a Friday. Travelers who choose to depart for Philadelphia on a Friday will often find tickets for as low as $437. On the other hand, Sunday is the most expensive day to depart from Islip, New York because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $778.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is at noon. momondo users have found flights departing from Islip, New York to Philadelphia at noon for as low as $316. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the afternoon when prices are around $714.

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

Fastest flight time	10h 40m
Direct flights	None

The fastest flight from Islip, New York to Philadelphia takes 10h 40m

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

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How far is Islip Long Island to Philadelphia by plane?
There are 115.4 mi between Islip Long Island and Philadelphia. 10h 40m 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.

Wildwood

Cape May

Rehoboth Beach

Ocean City

Wildwood Crest

King of Prussia

Cherry Hill

Newark

Dewey Beach

Reading

North Wildwood

Avalon

Dover

Lewes

Stone Harbor

Essington

Vineland

Pottstown

Somers Point

Elkton

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.