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Islip

$1,416+ Cheap flights from London (LON) to Islip, NY (ISP)

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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
LON — ISP
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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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 October 29, 2025.

This Mytrip deal was found by Cheapflights users on 10/27. 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.
Tue 12/236:40 amLHR - ISP
2 stops18h 05mMultiple Airlines
Sat 12/2712:40 pmISP - LHR
2 stops15h 40mMultiple Airlines
Deal found 10/27$1,416
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:00 amLHR - ISP
2 stops30h 04mMultiple Airlines
Mon 1/512:40 pmISP - LHR
1 stop13h 10mMultiple Airlines
Deal found 10/27$1,526

Cheap flight deals from London to Islip

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$1,416
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$557
Provider with most accurate pricing for London (LON)-New York (NYC) flight deals.
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Provider most trusted by Cheapflights users for London (LON)-New York (NYC) flights.
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From London (LON) to Islip Long Island
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Islip 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 October 29, 2025.
Use the filters below to find and compare flights from London to Islip that are best for you.

Fly from

London

Fly to

Islip

Route

Depart

Return

Price

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Tue 12/23

6:40 am-7:45 pm

2 stops18h 05m

Islip Long Island

Sat 12/27

12:40 pm-9:20 am

2 stops15h 40m

$1,416

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Tue 12/30

10:00 am-11:04 am

2 stops30h 04m

Islip Long Island

Mon 1/5

12:40 pm-6:50 am

1 stop13h 10m

$1,526

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

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, August is the cheapest month in which you can book a flight from London to Islip, New York (average of $130). Flying from London to Islip, New York in July is currently the most expensive (average of $455). 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.

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?

    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.

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

    Currently, August is the cheapest month in which you can book a flight from London to Islip, New York (average of $130). Flying from London to Islip, New York in July is currently the most expensive (average of $455). 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.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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