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Delaware

$201+ 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — ILG
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$201
(Trip.com)

Popular in

October

Cheapest in

September

Average price

$335
Provider with most accurate pricing for New York (NYC)-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Philadelphia flights.
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From Islip Long Island to Delaware
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Highest demand for flights based on searches. 12% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 February 20, 2025.

This Trip.com deal was found by Cheapflights users on 2/20. 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.
Fri 3/76:00 amISP - PHL
1 stop17h 42mFrontier
Tue 3/119:15 amPHL - ISP
1 stop16h 03mFrontier
Deal found 2/20$201
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/78:25 pmISP - PHL
2 stops21h 09mMultiple Airlines
Tue 3/1110:03 amPHL - ISP
2 stops27h 52mMultiple Airlines
Deal found 2/20$256

Find flights from Islip to Delaware within your budget

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 February 20, 2025.

Fly from

Islip

Fly to

Delaware

Route

Depart

Return

Price

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Fri 3/7

6:00 am-11:42 pm

1 stop17h 42m

Philadelphia

Tue 3/11

9:15 am-1:18 am

1 stop16h 03m

$201

IslipPhiladelphia

ISP - PHL

ISPPHL

Islip Long Island

Fri 3/7

8:25 pm-5:34 pm

2 stops21h 09m

Philadelphia

Tue 3/11

10:03 am-1:55 pm

2 stops27h 52m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Islip to Delaware

Get recent, data-driven insights about flights from Islip to Delaware including ideal travel times, pricing trends, and more.

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 February 20, 2025.
Frontier
6.0
Okay
3,355 reviews

Entertainment

4.6

Boarding

6.3

Overall

6.0

Comfort

5.7

Food

4.8

Crew

6.9

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

SAN - DEN

This was the worst flight ever. Stuck on the TARMAC for over 2 hrs. Then returned to airport and reboard. Missed our connecting flight but the flight crew that was with the delayed flight didn't miss the boarding and continued on. They didn't even tell us where to go and we could have made our original flight. The later flight they booked us on was delayed an extra 2 hrs. So our flight from San Diego to DC started a 6a and we landed around midnight. Roughly 18 hrs stuck in the most uncomfortable seats, look and feel like military plane KC-10 seats (bare basic metal frame with foam to cover it). No entertainment or charging plugs. Food and soda was priced ridiculous ($3.99 for a can of coke). The only thing free was water. I would never recommend flying this airline unless it was a last minute 1 way hop with only a personal item (i.e. small back pack). I will never book this airline again... Very similar to Spirit (which they are now partners with) which is awful. Again never fly this airline... not even in an emergency. Spend the extra seriously.

Frontier
6.0
Okay
3,355 reviews
Frontier
6.0
Okay
3,355 reviews

Entertainment

4.6

Boarding

6.3

Overall

6.0

Comfort

5.7

Food

4.8

Crew

6.9

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

SAN - DEN

This was the worst flight ever. Stuck on the TARMAC for over 2 hrs. Then returned to airport and reboard. Missed our connecting flight but the flight crew that was with the delayed flight didn't miss the boarding and continued on. They didn't even tell us where to go and we could have made our original flight. The later flight they booked us on was delayed an extra 2 hrs. So our flight from San Diego to DC started a 6a and we landed around midnight. Roughly 18 hrs stuck in the most uncomfortable seats, look and feel like military plane KC-10 seats (bare basic metal frame with foam to cover it). No entertainment or charging plugs. Food and soda was priced ridiculous ($3.99 for a can of coke). The only thing free was water. I would never recommend flying this airline unless it was a last minute 1 way hop with only a personal item (i.e. small back pack). I will never book this airline again... Very similar to Spirit (which they are now partners with) which is awful. Again never fly this airline... not even in an emergency. Spend the extra seriously.

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.

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