In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

What is the cheapest time of day to fly from SWF to ISP?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from New Windsor to Islip, New York as you normally would.

Most accurate provider : When it comes to deals on New Windsor-Islip, New York flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on New Windsor-Islip, New York flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from New Windsor-Islip, New York flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on New Windsor-Islip, New York flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New Windsor-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

How can I find direct flights from Stewart to Islip?

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

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

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

$127+ Flights from New Windsor to Islip, NY

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Cheap flight deals from Stewart to Islip

One-way flights from Stewart to Islip
Search for one-way flight options from Stewart to Islip. Find affordable one-way fares based on user searches. Data last updated December 11, 2025.

Fri 1/2312:11 pmSWF - ISP

1 stop7h 54mBreeze Airways

Deal found 12/9

$127

Find flight deals from Stewart to Islip

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars

Provider with most accurate pricing for New Windsor Stewart-Islip Long Island flight deals.

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Provider most trusted by Cheapflights users for New Windsor Stewart-Islip Long Island flights.

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New WindsorIslip

SWF - ISP

SWFISP

New Windsor Stewart

Fri 1/23

12:11 pm-8:05 pm

1 stop7h 54m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Compare providers for flights from Stewart to Islip

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Stewart to Islip in December.

Provider	Price Accuracy	Trust Score*
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy2 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on New Windsor-Islip, New York flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on New Windsor-Islip, New York flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from New Windsor-Islip, New York flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on New Windsor-Islip, New York flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New Windsor-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Stewart to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Stewart 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.

Related info for your journey

Can I find deals for flights from Stewart to Islip that include hotel bookings?
Yes. In addition to deals on Stewart to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Stewart to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Stewart to Islip.
Can I find deals for business class flights from Stewart to Islip?
Yes. Cheapflights offers flight deals from Stewart to Islip 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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$127+ Cheap flights from New Windsor to Islip, NY (SWF - ISP)

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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Stewart to Islip with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Stewart to Islip

One-way flights from Stewart to IslipSearch for one-way flight options from Stewart to Islip. Find affordable one-way fares based on user searches. Data last updated December 11, 2025.

Search for one-way flight options from Stewart to Islip. Find affordable one-way fares based on user searches. Data last updated December 11, 2025.

Find flight deals from Stewart to Islip

Most accurate provider

Most trusted provider

Cheapflights Fare Finder

Use the filters below to find and compare flights from New Windsor to Islip that are best for you.

Compare providers for flights from Stewart to Islip

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.