What is the cheapest airline to fly from London to Islip, New York round-trip?

Our cheapest airline available from London to Islip, New York is JetBlue. Our recent data shows that you can find tickets from as low as $1,730 on this airline.

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).

How far in advance should I book a flight from London to Islip, New York?

Travelers have found it’s best to book a flight 52 days in advance to save up to 34% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 52 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Islip, New York 1-2 weeks in advance for as low as $535, or $841 for flights within the next 24 hours.

What is the cheapest month to fly from London to Islip, New York?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, September can be a great choice for travel to Islip, New York. Flights to Islip, New York from London in September are about $548 on average during September, but can be found for as low as $363.

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

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

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

Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Islip from London. Booking flights from London to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from London from 0 different airlines.

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

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

How can I find direct flights from London to Islip?

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

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

Yes. Cheapflights offers flight deals from London 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.

$666+ Flights from London to Islip, NY

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Cheap flight deals from London to Islip

Round-trip from	$749 (Trip.com)
One-way from	$666 (Mytrip)
Popular in	July
Cheapest in	September
Average price	$673

From London (LON) to Islip Long Island

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One-way flight from London (LON) to Islip Long Island

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Highest demand for flights based on searches. 11% potential increase in price ($67 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from London to Islip

Cheapest flights from London to Islip
Explore the most affordable flight options available from London to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Wed 9/102:05 pmLHR - ISP

2 stops25h 35mMultiple Airlines

Wed 9/1711:35 amISP - LHR

2 stops17h 00mMultiple Airlines

Deal found 7/27

$749

Best flights from London to Islip
Discover carefully curated flight deals from London to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Wed 9/102:05 pmLHR - ISP

2 stops25h 35mMultiple Airlines

Wed 9/1711:35 amISP - LHR

2 stops17h 00mMultiple Airlines

Deal found 7/27

$749

Sun 1/47:25 amLHR - ISP

2 stops40h 21mJetBlue

Mon 4/611:40 amISP - LHR

2 stops28h 05mJetBlue

Deal found 7/29

$1,730

One-way flights from London to Islip
Search for one-way flight options from London to Islip. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Wed 9/246:00 amLHR - ISP

2 stops19h 01mMultiple Airlines

Deal found 7/27

$666

Fly from

Fly to

Route

Depart

Return

Price

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 9/10

2:05 pm-10:40 am

2 stops25h 35m

Islip Long Island

Wed 9/17

11:35 am-9:35 am

2 stops17h 00m

$749

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sun 1/4

7:25 am-6:46 pm

2 stops40h 21m

Islip Long Island

Mon 4/6

11:40 am-8:45 pm

2 stops28h 05m

$1,730

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 9/24

6:00 am-8:01 pm

2 stops19h 01m

$666

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from London to Islip

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

What is the cheapest month to book a flight from London to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from London to Islip, New York (average of $108). Flying from London to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Islip

Read reviews from past customers who have flown JetBlue from London to Islip. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

JetBlue

7.3

Good

2,913 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

JetBlue

7.3

Good

2,913 reviews

JetBlue

7.3

Good

2,913 reviews

Reviews

1 / 20

10.0

Excellent

Geri,May 2025

RSW - BOS

Full flight, even thought I had priority A boarding, the flight was more than 1/2 full with Mint & Mosaic members, before I could board and get overhead space.

Related info for your journey

What airport do you fly into for flights to Islip from London?
Located just 7.2 mi from the city center, Islip Long Island is the airport most travelers will use when flying to Islip from London. Booking flights from London to Long Island (ISP) should be relatively easy as there are 0 daily inbound flights from London from 0 different airlines.
What is the cheapest airline to fly from London to Islip, New York round-trip?
Our cheapest airline available from London to Islip, New York is JetBlue. Our recent data shows that you can find tickets from as low as $1,730 on this airline.
Can I find deals for flights from London to Islip that include hotel bookings?
Yes. In addition to deals on London to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Islip.
Can I find deals for business class flights from London to Islip?
Yes. Cheapflights offers flight deals from London 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.
What is the cheapest month to book a flight from London to Islip, New York?
Currently, January is the cheapest month in which you can book a flight from London to Islip, New York (average of $108). Flying from London to Islip, New York in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$666+ Cheap flights from London (LON) to Islip, NY (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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from London to Islip with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from London to Islip

Round-trip from

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Find flight deals from London to Islip

Cheapest flights from London to IslipExplore the most affordable flight options available from London to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from London to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from London to Islip

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

Cheapflights Insights

Everything you need to know about your flight from London to Islip

What is the cheapest month to book a flight from London to Islip, New York?

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated July 29, 2025.

Read reviews from past customers who have flown JetBlue from London to Islip. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to Islip. 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 into for flights to Islip from London?

What is the cheapest airline to fly from London to Islip, New York round-trip?

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

How can I find direct flights from London to Islip?

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

What is the cheapest month to book a flight from London to Islip, New York?

Traveling to a place near 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 London to Islip

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from London to Islip
Explore the most affordable flight options available from London to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.