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Islip

$548+ Cheap flights from the United Kingdom 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — ISP
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Cheap flight deals from United Kingdom to Islip

Keep the following information in mind while searching for United Kingdom to Islip flight deals. Data was last updated November 4, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$2,309
(Kiwi.com)

One-way from

$548
(Lucky2Go)

Popular in

December

Cheapest in

September

Average price

$518
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 United Kingdom to Islip Long Island
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One-way flight from United Kingdom to Islip Long Island
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Highest demand for flights based on searches. 4% potential increase in price ($28 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 November 2025
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Find flight deals from United Kingdom to Islip

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 November 4, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
Wed 11/199:20 amLHR - ISP
1 stop11h 55mMultiple Airlines
Sun 11/2312:40 pmISP - LHR
2 stops19h 00mMultiple Airlines
Deal found 11/3$2,309
This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
Wed 11/199:20 amLHR - ISP
1 stop11h 55mMultiple Airlines
Mon 11/2412:40 pmISP - LHR
2 stops23h 50mMultiple Airlines
Deal found 11/3$2,343
This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
Thu 11/207:55 pmLHR - ISP
2 stops28h 50mMultiple Airlines
Mon 11/2412:40 pmISP - LHR
1 stop13h 15mMultiple Airlines
Deal found 11/3$2,501
This Kiwi.com deal was found by Cheapflights users on 11/3. 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.
Thu 11/209:20 amLHR - ISP
1 stop11h 55mMultiple Airlines
Sun 11/2312:40 pmISP - LHR
2 stops19h 00mMultiple Airlines
Deal found 11/3$3,024

Cheapflights Fare Finder

 
Customize your flight search to find flights from United Kingdom 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 November 4, 2025.
Use the filters below to find and compare flights from the United Kingdom to Islip that are best for you.

Fly from

United Kingdom

Fly to

Islip

Route

Depart

Return

Price

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 11/19

9:20 am-4:15 pm

1 stop11h 55m

Islip Long Island

Sun 11/23

12:40 pm-12:40 pm

2 stops19h 00m

$2,309

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 11/19

9:20 am-4:15 pm

1 stop11h 55m

Islip Long Island

Mon 11/24

12:40 pm-5:30 pm

2 stops23h 50m

$2,343

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 11/20

7:55 pm-7:45 pm

2 stops28h 50m

Islip Long Island

Mon 11/24

12:40 pm-6:55 am

1 stop13h 15m

$2,501

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 11/20

9:20 am-4:15 pm

1 stop11h 55m

Islip Long Island

Sun 11/23

12:40 pm-12:40 pm

2 stops19h 00m

$3,024

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Tue 12/30

8:50 am-4:37 pm

2 stops36h 47m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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.
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 the United Kingdom to Islip

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

Currently, August is the cheapest month in which you can book a flight from United Kingdom to Islip, New York (average of $130). Flying from United Kingdom to Islip, New York in June is currently the most expensive (average of $429). 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 United Kingdom 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 United Kingdom?

    Most people fly into Islip Long Island (ISP) if they book a flight to Islip from United Kingdom. Long Island is conveniently located just 7.2 mi from Islip’s city center.

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

    Most travelers choose Glasgow Intl - Islip Long Island, Edinburgh Turnhouse - Islip Long Island or London Heathrow - Islip Long Island when deciding on the best route from United Kingdom to Islip, New York.

  • 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 vacation 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.

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

    Currently, August is the cheapest month in which you can book a flight from United Kingdom to Islip, New York (average of $130). Flying from United Kingdom to Islip, New York in June is currently the most expensive (average of $429). 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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