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Delaware

$128+ Cheap flights from Islip, NY (ISP) to Delaware

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — ILG
May 2 — May 91
Sat 5/2
Sat 5/9
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 April 2, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/274:07 pm
ISP
-
PHL
1 stop26h 31m
Frontier
Mon 5/48:41 pm
PHL
-
ISP
2 stops14h 19m
Frontier
Deal found 3/30$219
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 4/1511:50 am
ISP
-
PHL
2 stops19h 51m
Multiple Airlines
Thu 4/2310:38 pm
PHL
-
ISP
1 stop10h 35m
Multiple Airlines
Deal found 3/29$264
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Thu 4/164:07 pm
ISP
-
PHL
1 stop15h 34m
Multiple Airlines
Mon 4/2010:38 pm
PHL
-
ISP
2 stops36h 32m
Multiple Airlines
Deal found 4/1$284
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/1511:50 am
ISP
-
PHL
2 stops21h 06m
Multiple Airlines
Sun 4/1910:38 pm
PHL
-
ISP
1 stop10h 35m
Multiple Airlines
Deal found 3/31$286
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 4/264:07 pm
ISP
-
PHL
2 stops16h 03m
Frontier
Sun 5/310:38 pm
PHL
-
ISP
1 stop10h 35m
Frontier
Deal found 3/29$338
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Tue 4/149:38 am
ISP
-
PHL
2 stops15h 16m
Frontier
Sat 4/182:22 pm
PHL
-
ISP
1 stop18h 51m
Frontier
Deal found 3/29$366
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Fri 4/108:09 pm
ISP
-
PHL
2 stops14h 34m
Multiple Airlines
Sun 4/128:53 pm
PHL
-
ISP
1 stop18h 18m
Multiple Airlines
Deal found 3/31$398
This Booking.com deal was found by Cheapflights users on 3/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:45 pm
ISP
-
SBY
3 stops47h 41m
Breeze Airways
Mon 9/288:52 pm
SBY
-
ISP
2 stops38h 28m
Breeze Airways
Deal found 3/28$842
This KAYAK deal was found by Cheapflights users on 3/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:26 pm
ISP
-
SBY
2 stops24h 02m
Breeze Airways
Wed 4/2911:30 am
SBY
-
ISP
2 stops50h 01m
Breeze Airways
Deal found 3/29$947
This Gotogate deal was found by Cheapflights users on 4/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:09 pm
ISP
-
SBY
2 stops49h 22m
Breeze Airways
Sat 7/48:06 pm
SBY
-
ISP
3 stops21h 04m
Breeze Airways
Deal found 4/1$1,060
This KAYAK deal was found by Cheapflights users on 3/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/195:50 pm
ISP
-
SBY
2 stops25h 41m
Breeze Airways
Sat 7/258:06 pm
SBY
-
ISP
3 stops21h 04m
Breeze Airways
Deal found 3/29$1,073

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 April 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$219
(Kiwi.com)

One-way from

$128
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$519
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
One-way flight from Islip Long Island to Delaware
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($86 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 2, 2026.
Use the filters below to find and compare flights from Islip to Delaware that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 4/27

4:07 pm-6:38 pm

1 stop26h 31m

Philadelphia

Mon 5/4

10:38 pm-11:00 am

1 stop12h 22m

$223

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/15

11:50 am-7:41 am

2 stops19h 51m

Philadelphia

Thu 4/23

10:38 pm-9:13 am

1 stop10h 35m

$264

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/15

11:50 am-8:56 am

2 stops21h 06m

Philadelphia

Sun 4/19

10:38 pm-9:13 am

1 stop10h 35m

$286

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 4/26

4:07 pm-8:10 am

2 stops16h 03m

Philadelphia

Sun 5/3

10:38 pm-9:13 am

1 stop10h 35m

$338

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Tue 4/14

9:38 am-12:54 am

2 stops15h 16m

Philadelphia

Sat 4/18

2:22 pm-9:13 am

1 stop18h 51m

$366

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Thu 4/16

4:07 pm-8:56 am

1 stop16h 49m

Philadelphia

Mon 4/20

5:30 am-1:31 pm

1 stop8h 01m

$374

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Wed 4/29

6:49 pm-2:32 pm

1 stop19h 43m

Philadelphia

Sat 5/2

7:10 pm-9:13 am

2 stops14h 03m

$458

IslipSalisbury

ISP - SBY

ISPSBY

Islip Long Island

Thu 9/24

7:45 pm-7:26 pm

3 stops47h 41m

Salisbury-Ocean City

Mon 9/28

8:52 pm-11:20 am

2 stops38h 28m

$842
Quickest round-trip

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 4/26

9:59 am-5:38 pm

1 stop7h 39m

Philadelphia

Sun 5/3

6:00 am-11:05 am

1 stop5h 05m

$882

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sun 7/12

11:25 am-11:51 pm

2 stops12h 26m

Philadelphia

Wed 7/15

8:28 am-11:17 pm

2 stops14h 49m

$908

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

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

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 and Breeze Airways fly from Islip, New York to Delaware in about 26h 31m. The time it takes to get you to your destination can typically vary by up to 21h 10m. Islip, New York and Delaware are separated by a distance of 129 mi. This flight may include one or multiple stops.

  • 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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