HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Delaware

$294+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — ILG
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Delaware with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Islip to Delaware

Keep the following information in mind while searching for Islip to Delaware flight deals. Data was last updated July 31, 2025.

Round-trip from

$294
(Trip.com)

Popular in

April

Cheapest in

September

Average price

$406
From Islip Long Island to Delaware
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find 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 July 31, 2025.

This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/278:00 amISP - PHL
1 stop12h 57mMultiple Airlines
Wed 9/35:45 amPHL - ISP
1 stop17h 56mMultiple Airlines
Deal found 7/30$294
This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/118:38 pmISP - PHL
1 stop27h 21mFrontier
Wed 8/139:30 amPHL - ISP
1 stop10h 22mFrontier
Deal found 7/30$328
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/111:40 amISP - PHL
1 stop7h 45mJetBlue
Mon 8/45:40 pmPHL - ISP
2 stops16h 54mJetBlue
Deal found 7/30$1,116

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 July 31, 2025.
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 8/27

8:00 am-8:57 pm

1 stop12h 57m

Philadelphia

Wed 9/3

5:45 am-11:41 pm

1 stop17h 56m

$294

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Mon 8/11

8:38 pm-11:59 pm

1 stop27h 21m

Philadelphia

Wed 8/13

9:30 am-7:52 pm

1 stop10h 22m

$328

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 8/23

2:12 pm-11:29 pm

2 stops33h 17m

$339

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Sat 8/23

11:40 am-7:01 pm

1 stop7h 21m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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.

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Delaware. Reviews last updated July 31, 2025.
Read through reviews of airlines operating flights from Islip to Delaware, such as JetBlue and Frontier. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
JetBlue
7.3
Good
2,914 reviews

Overall

7.3

Boarding

7.4

Entertainment

7.3

Food

6.7

Crew

8.0

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Kevin,Jul 2025

JFK - POS

Flight was delayed a couple hours with no explanation. The aircraft was changed and so did our seating arrangement with no notice.
JetBlue
7.3
Good
2,914 reviews
JetBlue
7.3
Good
2,914 reviews

Overall

7.3

Boarding

7.4

Entertainment

7.3

Food

6.7

Crew

8.0

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Kevin,Jul 2025

JFK - POS

Flight was delayed a couple hours with no explanation. The aircraft was changed and so did our seating arrangement with no notice.
Frontier
5.9
Fair
3,239 reviews
JetBlue
7.3
Good
2,914 reviews

Overall

7.3

Boarding

7.4

Entertainment

7.3

Food

6.7

Crew

8.0

Comfort

7.6

Reviews

1 / 20
2.0
Mediocre

Kevin,Jul 2025

JFK - POS

Flight was delayed a couple hours with no explanation. The aircraft was changed and so did our seating arrangement with no notice.

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.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Islip to Delaware

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Fort Lauderdale flights
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to O'Hare Intl flights
Newark to Los Angeles flights
LaGuardia to O'Hare Intl flights
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to Orlando flights
John F Kennedy Intl to Miami flights
Newark to Orlando flights
John F Kennedy Intl to O'Hare Intl flights
John F Kennedy Intl to Seattle flights
John F Kennedy Intl to San Francisco flights
Newark to Miami flights
LaGuardia to Miami flights
LaGuardia to Dallas/Fort Worth flights
Newark to Seattle flights
Newark to San Francisco flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Atlanta flights
LaGuardia to Orlando flights
LaGuardia to Atlanta flights
Newark to Las Vegas flights
LaGuardia to Los Angeles flights
LaGuardia to Las Vegas flights
Newark to Atlanta flights
John F Kennedy Intl to West Palm Beach flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
LaGuardia to Seattle flights
LaGuardia to San Francisco flights
Newark to Tampa flights
John F Kennedy Intl to Hobby flights
LaGuardia to Denver flights
Newark to Burbank flights
Newark to Denver flights
John F Kennedy Intl to Midway flights
John F Kennedy Intl to Honolulu flights
Newark to Midway flights
LaGuardia to Nashville flights
LaGuardia to Hobby flights
John F Kennedy Intl to Tampa flights
Newark to Ontario flights
John F Kennedy Intl to Ontario flights
John F Kennedy Intl to Denver flights
LaGuardia to Midway flights
John F Kennedy Intl to San Diego flights
Newark to San Diego flights
John F Kennedy Intl to Sky Harbor Intl flights
Newark to Hobby flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights