Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Philadelphia to New York from $171

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to New York departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Philadelphia to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:45 pm - 4:47 pm
PHL
-
ISP
24h 02m
2 stops
Multiple Airlines Logo
7:09 pm - 8:51 am
ISP
-
PHL
13h 42m
1 stop
$310Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Frontier Logo
5:16 pm - 9:53 am
PHL
-
ISP
16h 37m
1 stop
Frontier Logo
7:09 pm - 8:51 am
ISP
-
PHL
13h 42m
1 stop
$314Frontier
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
8:35 am - 7:01 pm
PHL
-
ISP
10h 26m
1 stop
Multiple Airlines Logo
11:57 am - 9:41 pm
ISP
-
PHL
9h 44m
1 stop
$339Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
Multiple Airlines Logo
8:35 am - 7:01 pm
PHL
-
ISP
10h 26m
1 stop
Multiple Airlines Logo
11:57 am - 10:33 pm
ISP
-
PHL
10h 36m
2 stops
$368Multiple Airlines
Sat, Aug 22 - Sat, Aug 29
Frontier Logo
6:40 pm - 7:01 pm
PHL
-
ISP
24h 21m
1 stop
Frontier Logo
7:09 pm - 8:28 pm
ISP
-
PHL
25h 19m
2 stops
$385Frontier
Fri, Aug 21 - Fri, Aug 28
Southwest Logo
12:45 pm - 10:05 pm
PHL
-
ISP
9h 20m
2 stops
Southwest Logo
12:35 pm - 9:40 pm
ISP
-
PHL
9h 05m
2 stops
$387Southwest
Fri, Aug 21 - Fri, Aug 28
Frontier Logo
1:32 pm - 7:01 pm
PHL
-
ISP
29h 29m
2 stops
Frontier Logo
10:57 am - 7:31 pm
ISP
-
PHL
8h 34m
1 stop
$389Frontier
Fri, Aug 14 - Thu, Aug 20
Multiple Airlines Logo
9:57 am - 5:29 pm
PHL
-
ISP
7h 32m
1 stop
Multiple Airlines Logo
10:57 am - 10:33 pm
ISP
-
PHL
11h 36m
2 stops
$397Multiple Airlines
Sat, Sep 5 - Sun, Sep 6
Multiple Airlines Logo
6:40 pm - 7:01 pm
PHL
-
ISP
24h 21m
1 stop
Multiple Airlines Logo
2:28 pm - 11:15 am
ISP
-
PHL
20h 47m
1 stop
$398Multiple Airlines
Fri, Aug 21 - Fri, Aug 28
Southwest Logo
2:05 pm - 10:05 pm
PHL
-
ISP
8h 00m
2 stops
Southwest Logo
10:20 am - 5:55 pm
ISP
-
PHL
7h 35m
2 stops
$407Southwest
Fri, Aug 14 - Thu, Aug 20

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Southwest flights from Philadelphia to Islip, New York

Our best Southwest deals on Philadelphia to Islip, New York flight tickets
Southwest
Aug 21
PHL12:45 pmPhiladelphia
9h 20m
2 stops
ISP10:05 pmIslip Long Island
Aug 28
ISP12:35 pmIslip Long Island
9h 05m
2 stops
PHL9:40 pmPhiladelphia
$387
Southwest
Aug 14
PHL2:05 pmPhiladelphia
8h 00m
2 stops
ISP10:05 pmIslip Long Island
Aug 20
ISP10:20 amIslip Long Island
7h 35m
2 stops
PHL5:55 pmPhiladelphia
$407
Southwest
Aug 22
PHL11:55 amPhiladelphia
8h 50m
2 stops
ISP8:45 pmIslip Long Island
Aug 29
ISP5:30 amIslip Long Island
9h 10m
2 stops
PHL2:40 pmPhiladelphia
$427

Frontier flights from Philadelphia to Islip, New York

Our best Frontier deals on Philadelphia to Islip, New York flight tickets
Frontier
Aug 24
PHL5:16 pmPhiladelphia
16h 37m
1 stop
ISP9:53 amIslip Long Island
Aug 31
ISP7:09 pmIslip Long Island
13h 42m
1 stop
PHL8:51 amPhiladelphia
$314
Frontier
Aug 21
PHL6:40 pmPhiladelphia
24h 21m
1 stop
ISP7:01 pmIslip Long Island
Aug 28
ISP7:09 pmIslip Long Island
25h 19m
2 stops
PHL8:28 pmPhiladelphia
$385
Frontier
Aug 14
PHL1:32 pmPhiladelphia
29h 29m
2 stops
ISP7:01 pmIslip Long Island
Aug 20
ISP10:57 amIslip Long Island
8h 34m
1 stop
PHL7:31 pmPhiladelphia
$389

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Islip, New York that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 29, 2026.
Use the filters below to find and compare flights from Philadelphia to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 8/24

4:45 pm-4:47 pm

2 stops24h 02m

Islip Long Island

Mon 8/31

7:09 pm-8:51 am

1 stop13h 42m

$310

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Mon 8/24

5:16 pm-9:53 am

1 stop16h 37m

Islip Long Island

Mon 8/31

7:09 pm-8:51 am

1 stop13h 42m

$314

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 8/22

8:35 am-7:01 pm

1 stop10h 26m

Islip Long Island

Sat 8/29

11:57 am-9:41 pm

1 stop9h 44m

$339

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 8/22

8:35 am-7:01 pm

1 stop10h 26m

Islip Long Island

Sat 8/29

11:57 am-10:33 pm

2 stops10h 36m

$368

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 8/21

6:40 pm-7:01 pm

1 stop24h 21m

Islip Long Island

Fri 8/28

7:09 pm-8:28 pm

2 stops25h 19m

$385

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 8/21

12:45 pm-10:05 pm

2 stops9h 20m

Islip Long Island

Fri 8/28

12:35 pm-9:40 pm

2 stops9h 05m

$387

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 8/14

1:32 pm-7:01 pm

2 stops29h 29m

Islip Long Island

Thu 8/20

10:57 am-7:31 pm

1 stop8h 34m

$389

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Sat 9/5

9:57 am-5:29 pm

1 stop7h 32m

Islip Long Island

Sun 9/6

10:57 am-10:33 pm

2 stops11h 36m

$397

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 8/21

6:40 pm-7:01 pm

1 stop24h 21m

Islip Long Island

Fri 8/28

2:28 pm-11:15 am

1 stop20h 47m

$398
Quickest round-trip

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Fri 8/14

2:05 pm-10:05 pm

2 stops8h 00m

Islip Long Island

Thu 8/20

10:20 am-5:55 pm

2 stops7h 35m

$407

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to New York from

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

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 Philadelphia to Islip Long Island?

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

When to book flights from Philadelphia to Islip, New York

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

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

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

Fastest flight time

9h 27m

Direct flights

None
The fastest flight from Philadelphia to Islip, New York takes 9h 27m
There are no direct flights from Philadelphia to Islip, New York. There are no popular flight routes from Philadelphia to Islip, New York.
Search flight deals

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

  • How far is Philadelphia to Islip Long Island by plane?

    There are 115.4 mi between Philadelphia and Islip Long Island. 9h 27m is a normal flight duration for this route.

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Islip Long Island Airport.

  • What documentation or ID do you need to fly to Islip Long Island Airport?

    The travel and health documents you'll need for your trip to Islip Long Island Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Islip Long Island Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
Montauk
Riverhead
Southampton
Sag Harbor
Amagansett

Why use momondo?

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

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 Philadelphia to Islip for you.

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

Flights from Philadelphia to Islip with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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

If you are not ready to book a flight from Philadelphia to Islip now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Islip and let you know when they change.

An easier way to manage your Islip, New York trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 8/28
Fri 9/4
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States