What is the cheapest airline that flies from Islip Long Island to Philadelphia?

JetBlue is the most popular carrier operating from Islip Long Island to Philadelphia

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.

$216 Cheap Flights from Islip to Philadelphia in 2026

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Find the cheapest flights from Islip, New York to Philadelphia

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8:54 pm - 11:14 am

ISP

PHL

14h 20m2 stops

5:30 am - 8:47 pm

PHL

ISP

15h 17m1 stop

$216Multiple Airlines

Mon, Jan 19 - Fri, Jan 23

7:53 pm - 11:19 am

ISP

PHL

39h 26m2 stops

6:57 pm - 1:31 pm

PHL

ISP

18h 34m1 stop

$240Multiple Airlines

Sun, Feb 1 - Sun, Feb 8

7:53 pm - 10:26 am

ISP

PHL

14h 33m1 stop

8:30 am - 6:48 pm

PHL

ISP

10h 18m1 stop

$272Frontier

Sun, Feb 1 - Sun, Feb 8

2:01 pm - 2:59 pm

ISP

PHL

24h 58m1 stop

5:30 am - 8:47 pm

PHL

ISP

15h 17m1 stop

$288Multiple Airlines

Mon, Jan 19 - Fri, Jan 23

Frontier flights from Islip, New York to Philadelphia

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

Frontier

Feb 1

ISP7:53 pmIslip Long Island

14h 33m

1 stop

PHL10:26 amPhiladelphia

Feb 8

PHL8:30 amPhiladelphia

10h 18m

1 stop

ISP6:48 pmIslip Long Island

$272

Find similar

Frontier

Jan 8

ISP8:40 pmIslip Long Island

23h 29m

1 stop

PHL8:09 pmPhiladelphia

Jan 10

PHL7:25 amPhiladelphia

11h 43m

1 stop

ISP7:08 pmIslip Long Island

$550

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

Mon 1/19

8:54 pm-11:14 am

2 stops14h 20m

Philadelphia

Fri 1/23

5:30 am-8:47 pm

1 stop15h 17m

$216

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 2/1

7:53 pm-11:19 am

2 stops39h 26m

Philadelphia

Sun 2/8

6:57 pm-1:31 pm

1 stop18h 34m

$240

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 2/1

7:53 pm-10:26 am

1 stop14h 33m

Philadelphia

Sun 2/8

8:30 am-6:48 pm

1 stop10h 18m

$272

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 1/19

2:01 pm-2:59 pm

1 stop24h 58m

Philadelphia

Fri 1/23

5:30 am-8:47 pm

1 stop15h 17m

$288

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Fri 2/6

12:25 pm-11:09 pm

1 stop10h 44m

$172

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 1/15

11:55 am-12:34 am

2 stops12h 39m

$194

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 5/16

11:57 am-11:59 pm

3 stops12h 02m

$197

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 1/15

11:55 am-12:45 am

3 stops12h 50m

$209

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 1/15

7:58 pm-7:48 pm

1 stop23h 50m

$244

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 1/21

12:25 pm-11:09 pm

1 stop10h 44m

$268

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 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

Prices

Airlines

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 $450. 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 $608.

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 in the morning. momondo users have found flights departing from Islip, New York to Philadelphia in the morning for as low as $439. 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 $611.

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	11h 53m
Direct flights	None

The fastest flight from Islip, New York to Philadelphia takes 11h 53m

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. 11h 53m 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

Wildwood Crest

Ocean City

King of Prussia

Cherry Hill

Newark

Dewey Beach

Reading

North Wildwood

Avalon

Dover

Lewes

Stone Harbor

Essington

Vineland

New Castle

Pottstown

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.