How do I get Price Alerts for flights from Islip, New York to Philadelphia?

Price Alerts will notify you by email when the price for flights to Philadelphia from Islip, New York decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

How can I save money on flights from Islip, New York to Philadelphia with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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.

$125 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:57 am - 11:24 pmISP Islip Long Island-PHL Philadelphia

12h 27m1 stop Raleigh-Durham

9:30 am - 10:17 amPHL Philadelphia-ISP Islip Long Island

24h 47m1 stop Raleigh-Durham

$258Multiple Airlines

Thu, Nov 12 - Wed, Nov 18

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

5h 27m1 stop Raleigh-Durham

12:36 pm - 10:17 amPHL Philadelphia-ISP Islip Long Island

21h 41m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham

$273Multiple Airlines

Thu, Nov 12 - Wed, Nov 18

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

5h 27m1 stop Raleigh-Durham

7:42 am - 2:22 pmPHL Philadelphia-ISP Islip Long Island

6h 40m1 stop Raleigh-Durham

$346Multiple Airlines

Thu, Nov 5 - Fri, Nov 13

10:57 am - 11:24 pmISP Islip Long Island-PHL Philadelphia

12h 27m1 stop Raleigh-Durham

5:45 pm - 11:20 amPHL Philadelphia-ISP Islip Long Island

17h 35m2 stops Orlando Raleigh-Durham

$383Multiple Airlines

Thu, Nov 5 - Fri, Nov 13

6:25 pm - 7:21 amISP Islip Long Island-PHL Philadelphia

36h 56m2 stops Orlando Atlanta Hartsfield-Jackson

7:25 pm - 2:22 pmPHL Philadelphia-ISP Islip Long Island

18h 57m1 stop Raleigh-Durham

$384Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

6:25 pm - 11:43 pmISP Islip Long Island-PHL Philadelphia

29h 18m1 stop Orlando

7:25 pm - 2:22 pmPHL Philadelphia-ISP Islip Long Island

18h 57m1 stop Raleigh-Durham

$450Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

6:33 pm - 9:25 amISP Islip Long Island-PHL Philadelphia

14h 52m2 stops Orlando San Juan Luis Munoz Marin Intl

5:22 pm - 5:31 pmPHL Philadelphia-ISP Islip Long Island

24h 09m2 stops Atlanta Hartsfield-Jackson Orlando

$471Frontier

Thu, Nov 12 - Wed, Nov 18

6:54 pm - 9:30 amISP Islip Long Island-PHL Philadelphia

14h 36m1 stop Orlando

9:58 pm - 3:45 pmPHL Philadelphia-ISP Islip Long Island

17h 47m1 stop Orlando

$490Frontier

Fri, Nov 13 - Sun, Nov 22

6:25 pm - 9:42 pmISP Islip Long Island-PHL Philadelphia

27h 17m1 stop Orlando

7:20 pm - 11:20 amPHL Philadelphia-ISP Islip Long Island

16h 00m1 stop Raleigh-Durham

$491Multiple Airlines

Thu, Oct 8 - Mon, Oct 12

10:57 am - 11:27 pmISP Islip Long Island-PHL Philadelphia

12h 30m1 stop Raleigh-Durham

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

19h 13m2 stops Orlando Wilmington New Hanover County

$520Multiple Airlines

Thu, Oct 8 - Mon, Oct 12

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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

Nov 12

ISP6:33 pmIslip Long Island

14h 52m

2 stops

PHL9:25 amPhiladelphia

Nov 18

PHL5:22 pmPhiladelphia

24h 09m

2 stops

ISP5:31 pmIslip Long Island

$471

Frontier

Nov 13

ISP6:54 pmIslip Long Island

14h 36m

1 stop

PHL9:30 amPhiladelphia

Nov 22

PHL9:58 pmPhiladelphia

17h 47m

1 stop

ISP3:45 pmIslip Long Island

$490

Frontier

Nov 5

ISP6:33 pmIslip Long Island

28h 51m

2 stops

PHL11:24 pmPhiladelphia

Nov 13

PHL2:49 pmPhiladelphia

26h 42m

2 stops

ISP5:31 pmIslip Long Island

$587

Southwest flights from Islip, New York to Philadelphia

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

Southwest

Oct 7

ISP12:50 pmIslip Long Island

8h 15m

2 stops

PHL9:05 pmPhiladelphia

Oct 8

PHL2:35 pmPhiladelphia

8h 40m

1 stop

ISP11:15 pmIslip Long Island

$524

Southwest

Oct 7

ISP12:50 pmIslip Long Island

8h 15m

2 stops

PHL9:05 pmPhiladelphia

Oct 8

PHL2:35 pmPhiladelphia

9h 05m

2 stops

ISP11:40 pmIslip Long Island

$529

Southwest

Oct 25

ISP6:15 pmIslip Long Island

6h 45m

1 stop

PHL1:00 amPhiladelphia

Nov 1

PHL2:30 pmPhiladelphia

9h 00m

2 stops

ISP11:30 pmIslip Long Island

$557

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

Thu 11/12

10:57 am-11:24 pm

1 stop12h 27m

Philadelphia

Wed 11/18

9:30 am-10:17 am

1 stop24h 47m

$258

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 11/12

10:57 am-4:24 pm

1 stop5h 27m

Philadelphia

Wed 11/18

12:36 pm-10:17 am

2 stops21h 41m

$273

Quickest round-trip

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 11/5

10:57 am-4:24 pm

1 stop5h 27m

Philadelphia

Fri 11/13

7:42 am-2:22 pm

1 stop6h 40m

$346

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 11/5

10:57 am-11:24 pm

1 stop12h 27m

Philadelphia

Fri 11/13

5:45 pm-11:20 am

2 stops17h 35m

$383

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Sun 10/25

6:25 pm-7:21 am

2 stops36h 56m

Philadelphia

Sun 11/1

7:25 pm-2:22 pm

1 stop18h 57m

$384

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Sun 10/25

6:25 pm-11:43 pm

1 stop29h 18m

Philadelphia

Sun 11/1

7:25 pm-2:22 pm

1 stop18h 57m

$450

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 11/12

6:33 pm-9:25 am

2 stops14h 52m

Philadelphia

Wed 11/18

5:22 pm-5:31 pm

2 stops24h 09m

$471

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Fri 11/13

6:54 pm-9:30 am

1 stop14h 36m

Philadelphia

Sun 11/22

9:58 pm-3:45 pm

1 stop17h 47m

$490

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 10/8

6:25 pm-9:42 pm

1 stop27h 17m

Philadelphia

Mon 10/12

7:20 pm-11:20 am

1 stop16h 00m

$491

IslipPhiladelphia

ISP Islip Long Island - PHL Philadelphia

ISPPHL

Islip Long Island

Thu 10/8

10:57 am-11:27 pm

1 stop12h 30m

Philadelphia

Mon 10/12

5:45 pm-12:58 pm

2 stops19h 13m

$520

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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	$125
Fastest flight time	6h 26m
Direct flights	None

The best one-way flight to Philadelphia from Islip, New York in the past 72 hours is $125. The best round-trip flight deal from Islip, New York to Philadelphia found on momondo in the last 72 hours is $258.

The fastest flight from Islip, New York to Philadelphia takes 6h 26m

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. 6h 26m 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.

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

How do I get Price Alerts for flights from Islip, New York to Philadelphia?
Price Alerts will notify you by email when the price for flights to Philadelphia from Islip, New York decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Islip, New York to Philadelphia with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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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.