In terms of precipitation, rainfall in Islip, New York ranges from 84.0 - 112.0 inches per month. March is typically the wettest month, when rainfall can reach 112.0 mm. February is typically the driest time to visit Islip, New York when rainfall is around 84.0 mm.

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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

What are the most popular routes from United Kingdom to Islip, New York?

The most popular flight routes from United Kingdom to Islip, New York are London Heathrow - Islip Long Island, Edinburgh Turnhouse - Islip Long Island and Manchester - Islip Long Island.

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

When flying from United Kingdom to Islip, New York, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Islip from United Kingdom?

Located just 7.2 mi from the city center, Islip Long Island (ISP) is the airport most travelers will use when flying to Islip from United Kingdom.

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

Yes. In addition to deals on United Kingdom to Islip flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from United Kingdom to Islip?

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

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

Yes. Cheapflights offers flight deals from United Kingdom 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.

£1,008+ Cheap Flights from the United Kingdom to Islip, New York

Cheap flight deals from United Kingdom to Islip

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from United Kingdom to Islip
Explore the most affordable flight options available from United Kingdom to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2026.

Thu 1/1019:10 -

2 stops30h 49m

Thu 8/1014:16 -

2 stops13h 39m

Deal found 16/8£1,046

Mon 31/809:50 -

2 stops29h 03m

Thu 3/910:57 -

1 stop13h 23m

Deal found 17/8£1,165

Tue 1/913:05 -

2 stops26h 51m

Thu 24/914:16 -

2 stops25h 44m

Deal found 20/8£1,192

Sat 3/1019:50 -

2 stops27h 45m

Sat 10/1009:05 -

1 stop16h 25m

Deal found 19/8£1,723

Tue 8/919:50 -

2 stops26h 51m

Tue 15/910:05 -

1 stop15h 25m

Deal found 18/8£1,741

Find flight deals from United Kingdom to Islip

Round-trip from	£1,046
One-way from	£1,008
Popular in	July
Cheapest in	February
Average price	£545

1/10-8/10
4 total stops
44h 28m total
United Kingdom to Islip

Search Deals

5/10
2 total stops
30h 10m total
United Kingdom to Islip

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£79 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ManchesterIslip

MAN Manchester - ISP Islip Long Island

MANISP

Manchester

Thu 1/10

19:10-20:59

2 stops30h 49m

Islip Long Island

Thu 8/10

14:16-08:55

2 stops13h 39m

£1,046

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Mon 31/8

09:50-09:53

2 stops29h 03m

Islip Long Island

Thu 3/9

10:57-05:20

1 stop13h 23m

£1,165

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Tue 1/9

13:05-10:56

2 stops26h 51m

Islip Long Island

Thu 24/9

14:16-09:15

1 stop13h 59m

£1,192

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Tue 8/9

19:50-17:41

2 stops26h 51m

Islip Long Island

Tue 15/9

10:05-06:30

1 stop15h 25m

£1,741

Fastest return journey

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Sat 3/10

08:40-18:35

1 stop14h 55m

Islip Long Island

Sat 10/10

09:05-06:30

1 stop16h 25m

£1,780

Cheapest one-way

Fastest single journey

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Mon 5/10

21:25-22:35

2 stops30h 10m

£1,008

Flights are sorted by cheapest return flights first.

Deals found on 19/8

Sorted by cheapest first

Best time to book a flight from United Kingdom to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from United Kingdom with our price prediction graph.

MAN-ISP

LHR-ISP

Estimated return 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 the United Kingdom to Islip

GB0-ISP

MAN-ISP

LHR-ISP

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly into for flights to Islip from United Kingdom?
Located just 7.2 mi from the city center, Islip Long Island (ISP) is the airport most travelers will use when flying to Islip from United Kingdom.
What are the most popular routes from United Kingdom to Islip, New York?
The most popular flight routes from United Kingdom to Islip, New York are London Heathrow - Islip Long Island, Edinburgh Turnhouse - Islip Long Island and Manchester - Islip Long Island.
Can I find deals for flights from United Kingdom to Islip that include hotel bookings?
Yes. In addition to deals on United Kingdom to Islip flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from United Kingdom to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Islip.
Can I find deals for business class flights from United Kingdom to Islip?
Yes. Cheapflights offers flight deals from United Kingdom 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for United Kingdom to Islip

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Cardiff to John F Kennedy Intl flights

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Belfast Intl to John F Kennedy Intl flights

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to Islip. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Islip?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to Islip.

Can Cheapflights find flights from United Kingdom to Islip with no change fees?

Yes! Cheapflights helps users easily find flights from United Kingdom to Islip with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to Islip become cheaper?

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Cheap flights from the United Kingdom to Islip, New York from £1,008

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from United Kingdom to Islip

Cheapest flights from United Kingdom to IslipExplore the most affordable flight options available from United Kingdom to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2026.

Explore the most affordable flight options available from United Kingdom to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2026.

Best flights from United Kingdom to IslipDiscover carefully curated flight deals from United Kingdom to Islip that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 August 2026.

Discover carefully curated flight deals from United Kingdom to Islip that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 August 2026.

Last-minute flights from United Kingdom to IslipDiscover last-minute flight deals from United Kingdom to Islip. Data last updated 20 August 2026 and is based on user searches.

Discover last-minute flight deals from United Kingdom to Islip. Data last updated 20 August 2026 and is based on user searches.

One-way flights from United Kingdom to IslipSearch for one-way flight options from United Kingdom to Islip. Find affordable one-way fares based on user searches. Data last updated 20 August 2026.

Search for one-way flight options from United Kingdom to Islip. Find affordable one-way fares based on user searches. Data last updated 20 August 2026.

Find flight deals from United Kingdom to Islip

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Cheapflights Fare Finder

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

Best time to book a flight from United Kingdom to Islip

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Related info for your journey

What airport do you fly into for flights to Islip from United Kingdom?

What are the most popular routes from United Kingdom to Islip, New York?

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

How can I find direct flights from United Kingdom to Islip?

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

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 United Kingdom to Islip

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Islip by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to New York

Book a non-stop flight to one of these other cities located in New York.

Search flights from United Kingdom to Islip by cabin class

Find flights from United Kingdom to Islip, based on your preferred cabin class, be it economy, premium economy, business, or first class.

United Kingdom and Islip flights

Browse other United Kingdom and Islip flight options. Last updated on 20 August 2026.

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United Kingdom to Islip flights

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How does Cheapflights help users find flights from United Kingdom to Islip?

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Islip?

Can Cheapflights find flights from United Kingdom to Islip with no change fees?

Can Cheapflights notify me if prices for flights from United Kingdom to Islip become cheaper?

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Cheapest flights from United Kingdom to Islip
Explore the most affordable flight options available from United Kingdom to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 August 2026.

Best flights from United Kingdom to Islip
Discover carefully curated flight deals from United Kingdom to Islip that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 August 2026.

Last-minute flights from United Kingdom to Islip
Discover last-minute flight deals from United Kingdom to Islip. Data last updated 20 August 2026 and is based on user searches.

One-way flights from United Kingdom to Islip
Search for one-way flight options from United Kingdom to Islip. Find affordable one-way fares based on user searches. Data last updated 20 August 2026.