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$312+ Cheap flights from Islip, NY (ISP) to the United Kingdom

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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LHR
feb. 20 — feb. 271
vie. 2/20
vie. 2/27
1 adult, Economy
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Cheap flight deals from Islip to United Kingdom

Cheapest flights from Islip to United Kingdom
Explore the most affordable flight options available from Islip to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2026.

This Ovago deal was found by Cheapflights users on 1/21. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/189:59 am
ISP
-
LHR
1 stop16h 01m
Multiple Airlines
mié. 2/255:05 pm
LHR
-
ISP
1 stop30h 39m
Multiple Airlines
Deal found 1/21$1,249
This Gurufare deal was found by Cheapflights users on 1/20. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/159:59 am
ISP
-
LHR
1 stop17h 01m
Multiple Airlines
mié. 4/2211:00 am
LHR
-
ISP
1 stop12h 44m
Multiple Airlines
Deal found 1/20$1,343
This Ovago deal was found by Cheapflights users on 1/21. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 3/89:59 am
ISP
-
LHR
1 stop16h 51m
Multiple Airlines
dom. 3/159:40 am
LHR
-
ISP
1 stop13h 04m
Multiple Airlines
Deal found 1/21$1,393
This Ovago deal was found by Cheapflights users on 1/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/312:30 pm
ISP
-
EDI
2 stops14h 00m
Multiple Airlines
lun. 8/104:35 pm
EDI
-
ISP
2 stops23h 30m
Multiple Airlines
Deal found 1/20$1,640
This Ovago deal was found by Cheapflights users on 1/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/412:30 pm
ISP
-
EDI
2 stops14h 00m
Multiple Airlines
mar. 8/113:30 pm
EDI
-
ISP
2 stops24h 35m
Multiple Airlines
Deal found 1/20$1,723
This Ovago deal was found by Cheapflights users on 1/21. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 3/79:59 am
ISP
-
EDI
2 stops16h 51m
Multiple Airlines
sáb. 3/149:00 am
EDI
-
ISP
2 stops13h 44m
Multiple Airlines
Deal found 1/21$1,749
This Expedia deal was found by Cheapflights users on 1/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 2/189:29 am
ISP
-
LGW
1 stop17h 01m
Multiple Airlines
mié. 2/2511:20 am
LGW
-
ISP
1 stop26h 27m
Multiple Airlines
Deal found 1/21$9,738

Find flight deals from Islip to United Kingdom

Keep the following information in mind while searching for Islip to United Kingdom flight deals. Data was last updated enero 21, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,247
(Ovago)

One-way from

$312
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$565
Provider with most accurate pricing for New York (NYC)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-London (LON) flights.
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From Islip Long Island to United Kingdom
Search Deals
One-way flight from Islip Long Island to United Kingdom
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($29 potential increase over avg. RT price).
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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 January 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to United Kingdom 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 enero 21, 2026.
Use the filters below to find and compare flights from Islip to the United Kingdom that are best for you.

Fly from

Islip

Fly to

United Kingdom

Route

Depart

Return

Price

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

mié. 2/18

9:59 am-7:00 am

1 stop16h 01m

London Heathrow

mié. 2/25

5:05 pm-6:44 pm

1 stop30h 39m

$1,249

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

mié. 4/15

9:59 am-8:00 am

1 stop17h 01m

London Heathrow

mié. 4/22

11:00 am-6:44 pm

1 stop12h 44m

$1,343

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

dom. 3/8

9:59 am-6:50 am

1 stop16h 51m

London Heathrow

dom. 3/15

9:40 am-6:44 pm

1 stop13h 04m

$1,393

IslipEdinburgh

ISP - EDI

ISPEDI

Islip Long Island

sáb. 3/7

9:59 am-7:50 am

2 stops16h 51m

Edinburgh Turnhouse

sáb. 3/14

9:00 am-6:44 pm

2 stops13h 44m

$1,749

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

mié. 2/18

9:29 am-7:30 am

1 stop17h 01m

London Gatwick

mié. 2/25

11:20 am-8:47 am

1 stop26h 27m

$9,738

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

dom. 3/22

7:26 pm-10:00 am

2 stops34h 34m

$312

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

dom. 3/22

4:34 pm-7:55 pm

3 stops47h 21m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Best time to book a flight from Islip to United Kingdom

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

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

Currently, November is the cheapest month in which you can book a flight from Islip, New York to United Kingdom (average of $75). Flying from Islip, New York to United Kingdom in July is currently the most expensive (average of $406). 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 Islip to United Kingdom. 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 from for flights from Islip to 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 United Kingdom from Islip.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to United Kingdom 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 Islip, New York to United Kingdom?

    Currently, November is the cheapest month in which you can book a flight from Islip, New York to United Kingdom (average of $75). Flying from Islip, New York to United Kingdom in July is currently the most expensive (average of $406). 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

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Alternative routes for Islip to United Kingdom

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