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Delaware

$182+ Cheap flights from Islip, NY (ISP) to Delaware

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — ILG
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Islip to Delaware

Cheapest flights from Islip to Delaware
Explore the most affordable flight options available from Islip to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1111:50 am
ISP
-
PHL
1 stop9h 55m
Multiple Airlines
Thu 3/55:30 am
PHL
-
ISP
1 stop9h 09m
Multiple Airlines
Deal found 1/27$182
This Kiwi.com deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/231:22 pm
ISP
-
PHL
1 stop22h 19m
Frontier
Thu 3/2610:33 pm
PHL
-
ISP
1 stop14h 14m
Frontier
Deal found 1/28$298
This Kiwi.com deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/231:22 pm
ISP
-
PHL
2 stops19h 17m
Multiple Airlines
Thu 3/2610:33 pm
PHL
-
ISP
1 stop14h 14m
Multiple Airlines
Deal found 1/28$321
This Kiwi.com deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/224:34 pm
ISP
-
PHL
2 stops31h 42m
Multiple Airlines
Thu 3/2610:33 pm
PHL
-
ISP
1 stop14h 14m
Multiple Airlines
Deal found 1/28$338
This Kiwi.com deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/154:34 pm
ISP
-
PHL
1 stop15h 02m
Multiple Airlines
Sat 3/216:21 am
PHL
-
ISP
2 stops36h 25m
Multiple Airlines
Deal found 1/28$430

Find flight deals from Islip to Delaware

Keep the following information in mind while searching for Islip to Delaware flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$182
(Kiwi.com)

Popular in

October

Cheapest in

March

Average price

$377
Provider with most accurate pricing for New York (NYC)-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Philadelphia flights.
Search Deals
From Islip Long Island to Delaware
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Delaware 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, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Islip to Delaware that are best for you.

Fly from

Islip

Fly to

Delaware

Route

Depart

Return

Price

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 2/11

11:50 am-9:45 pm

1 stop9h 55m

Philadelphia

Thu 3/5

5:30 am-2:39 pm

1 stop9h 09m

$182

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 3/23

1:22 pm-11:41 am

1 stop22h 19m

Philadelphia

Thu 3/26

10:33 pm-12:47 pm

1 stop14h 14m

$298

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 3/23

1:22 pm-8:39 am

2 stops19h 17m

Philadelphia

Thu 3/26

10:33 pm-12:47 pm

1 stop14h 14m

$321

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 3/22

4:34 pm-12:16 am

2 stops31h 42m

Philadelphia

Thu 3/26

10:33 pm-12:47 pm

1 stop14h 14m

$338

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 3/15

4:34 pm-7:36 am

1 stop15h 02m

Philadelphia

Sat 3/21

6:21 am-6:46 pm

2 stops36h 25m

$430

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 2/14

1:28 pm-11:39 pm

1 stop10h 11m

$466

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 5/31

12:35 pm-11:01 pm

1 stop10h 26m

$575

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Best time to book a flight from Islip to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to Delaware
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Islip to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to Delaware?

    Islip Long Island (ISP), located 7.2 mi from the city center, is the airport you fly out of when you book flights from Islip to Delaware.

  • How long is the flight from Islip, New York to Delaware?

    Airlines like Frontier fly from Islip, New York to Delaware in about 22h 19m. The time it takes to get you to your destination can typically vary by up to . Islip, New York and Delaware are separated by a distance of 129 mi.

  • Can I find deals for flights from Islip to Delaware that include hotel bookings?

    Yes. In addition to deals on Islip to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Delaware.

  • Can I find deals for business class flights from Islip to Delaware?

    Yes. Cheapflights offers flight deals from Islip to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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