PHL - ISP

$148 Find Cheap Flights from Philadelphia to Islip - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$325
Typical prices: $238-$1,417
Frontier
Sun 9/30Sun 10/7
PHL - ISP • 1 stop
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Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Islip (PHL-ISP)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Islip

Wed, Sep 30 - Wed, Oct 7
Multiple Airlines Logo
7:15 am - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
9h 43m1 stop Orlando
Multiple Airlines Logo
12:00 pm - 9:32 amISP  Islip Long Island-PHL Philadelphia
21h 32m2 stops Raleigh-Durham Orlando
$325Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Frontier Logo
7:15 am - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
9h 43m1 stop Orlando
Frontier Logo
5:43 pm - 9:32 amISP  Islip Long Island-PHL Philadelphia
15h 49m1 stop Orlando
$353Frontier
Fri, Oct 23 - Sun, Oct 25
Multiple Airlines Logo
7:42 am - 2:22 pmPHL  Philadelphia-ISP Islip Long Island
6h 40m1 stop Raleigh-Durham
Multiple Airlines Logo
6:25 pm - 9:32 amISP  Islip Long Island-PHL Philadelphia
15h 07m1 stop Orlando
$361Multiple Airlines
Fri, Sep 18 - Tue, Sep 22
Multiple Airlines Logo
7:19 pm - 11:20 amPHL  Philadelphia-ISP Islip Long Island
16h 01m1 stop Raleigh-Durham
Multiple Airlines Logo
5:43 pm - 9:30 amISP  Islip Long Island-PHL Philadelphia
15h 47m1 stop Orlando
$371Multiple Airlines
Fri, Oct 23 - Sun, Oct 25
Southwest Logo
3:20 pm - 11:40 pmPHL  Philadelphia-ISP Islip Long Island
8h 20m2 stops Chicago Midway Baltimore/Washington
Southwest Logo
6:15 pm - 1:00 amISP  Islip Long Island-PHL Philadelphia
6h 45m1 stop Orlando
$382Southwest
Thu, Oct 1 - Mon, Oct 5
Frontier Logo
6:00 am - 6:03 pmPHL  Philadelphia-ISP Islip Long Island
12h 03m1 stop Tampa
Frontier Logo
5:43 pm - 12:09 amISP  Islip Long Island-PHL Philadelphia
6h 26m1 stop Orlando
$384Frontier
Fri, Sep 18 - Tue, Sep 22
Multiple Airlines Logo
7:19 pm - 11:20 amPHL  Philadelphia-ISP Islip Long Island
16h 01m1 stop Raleigh-Durham
Multiple Airlines Logo
12:00 pm - 12:09 amISP  Islip Long Island-PHL Philadelphia
12h 09m2 stops Raleigh-Durham Orlando
$397Multiple Airlines
Thu, Oct 1 - Mon, Oct 5
Frontier Logo
10:00 am - 6:03 pmPHL  Philadelphia-ISP Islip Long Island
8h 03m1 stop Tampa
Frontier Logo
5:43 pm - 12:09 amISP  Islip Long Island-PHL Philadelphia
6h 26m1 stop Orlando
$399Frontier
Fri, Sep 25 - Thu, Oct 1
Frontier Logo
10:10 am - 4:58 pmPHL  Philadelphia-ISP Islip Long Island
6h 48m1 stop Orlando
Frontier Logo
5:43 pm - 6:31 pmISP  Islip Long Island-PHL Philadelphia
24h 48m1 stop Orlando
$407Frontier
Thu, Oct 1 - Mon, Oct 5
Frontier Logo
10:00 am - 6:03 pmPHL  Philadelphia-ISP Islip Long Island
8h 03m1 stop Tampa
Frontier Logo
5:43 pm - 12:09 amISP  Islip Long Island-PHL Philadelphia
6h 26m1 stop Orlando
$420Frontier
Booking Insights

Price, demand and travel trends for Philadelphia to Islip flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Philadelphia to Islip with more confidence.

What is the cheapest airline to fly from Philadelphia to Islip?

Frontier ($353) and Southwest ($382) are the cheapest airlines to fly round-trip from Philadelphia to Islip according to KAYAK data over the last 5 days.

Find deals

Key details for Philadelphia to Islip flights

Cheapest flight

$148
Flight from Philadelphia to Islip

When to book flights from Philadelphia to Islip

Are your dates flexible? Find out the best times to travel from Philadelphia to Islip based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Philadelphia to Islip flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Philadelphia to Islip?

    Flights from Philadelphia to Islip usually depart from Philadelphia (PHL) and arrive at Islip Long Island (ISP).

  • What cabin classes can I book on flights from Philadelphia to Islip?

    Only Economy Class is available on flights from Philadelphia to Islip.

  • Can I save money by using flexible dates for flights from Philadelphia to Islip?

    Yes. Being flexible with your travel dates can save you up to 84% on the Philadelphia to Islip route. Monday is the cheapest departure day at $238 round-trip on average, while Saturday is the most expensive at $1,417, a difference of $1,179. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Do I need a passport to fly from Philadelphia to Islip?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Philadelphia to Islip changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $325 to $883. That means the highest observed fare was about 3x higher than the lowest one.

  • What car rental options are available at Islip Long Island Airport (ISP)?

    Islip Long Island Airport (ISP) hosts 5 major car rental companies, with daily rates starting from around $36 for economy cars. Top options include:
    · Budget
    · Enterprise Rent-A-Car
    · Avis
    · National
    · Empire Rent A Car

Your guide to booking Philadelphia to Islip flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Monday departure instead of Saturday. On this route, Monday flights average $238 - about $1,179 less than Saturday (83% savings) based on the last 12 months.

More options for your flight from Philadelphia to Islip

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