Cheap flights from Philadelphia to New York from $242

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to New York departing on 10/16. 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
0 bags

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.

Find the cheapest flights from Philadelphia to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:16 am - 8:42 pmPHL-ISP
9h 26m1 stop
Frontier Logo
9:37 pm - 7:30 amISP-PHL
9h 53m1 stop
$242Frontier
Find Deal
Thu, Oct 16 - Thu, Oct 23
Multiple Airlines Logo
5:01 am - 7:14 pmPHL-ISP
14h 13m1 stop
Multiple Airlines Logo
2:19 pm - 10:05 pmISP-PHL
31h 46m2 stops
$501Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 30
Multiple Airlines Logo
5:01 am - 7:14 pmPHL-ISP
14h 13m1 stop
Multiple Airlines Logo
9:09 pm - 10:05 pmISP-PHL
24h 56m1 stop
$508Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 30
Multiple Airlines Logo
10:33 am - 11:04 amPHL-ISP
24h 31m2 stops
Multiple Airlines Logo
9:59 am - 9:55 amISP-PHL
23h 56m2 stops
$793Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 30

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Islip 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 October 1, 2025.
Use the filters below to find and compare flights from Philadelphia to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Thu 10/16

11:16 am-8:42 pm

1 stop9h 26m

Islip Long Island

Thu 10/23

9:37 pm-7:30 am

1 stop9h 53m

$242

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 12/2

5:01 am-7:14 pm

1 stop14h 13m

Islip Long Island

Tue 12/30

2:19 pm-10:05 pm

2 stops31h 46m

$501

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 12/2

5:01 am-7:14 pm

1 stop14h 13m

Islip Long Island

Tue 12/30

9:09 pm-10:05 pm

1 stop24h 56m

$508

PhiladelphiaIslip

PHL - ISP

PHLISP

Philadelphia

Tue 12/2

10:33 am-11:04 am

2 stops24h 31m

Islip Long Island

Tue 12/30

9:59 am-9:55 am

2 stops23h 56m

$793

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Philadelphia to Islip

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

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

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

Direct flights

None
There are no direct flights from Philadelphia to Islip. There are no popular flight routes from Philadelphia to Islip.
  • How far is Philadelphia to Islip Long Island by plane?

    There are 115.4 mi between Philadelphia and Islip Long Island. 9h 26m 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.

  • How do I get Price Alerts for flights from Philadelphia to Islip?

    Search flight deals from Philadelphia to Islip. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Philadelphia to Islip with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Traveling to a place near New York?

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

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 10/31
Fri 11/7

Find better results for your trip to the United States