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$1,107+ Cheap flights from Islip, NY (ISP) to the United Kingdom

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 1/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LHR
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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Cheap flight deals from Islip to United Kingdom

Best flights from Islip to United Kingdom
Discover carefully curated flight deals from Islip to United Kingdom that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 12, 2025.

This Mytrip deal was found by Cheapflights users on 12/11. 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.
dom. 1/2512:30 pmISP - LHR
2 stops14h 35mMultiple Airlines
dom. 2/18:50 amLHR - ISP
2 stops15h 55mMultiple Airlines
Deal found 12/11$1,107
This Ovago deal was found by Cheapflights users on 12/10. 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. 1/247:25 amISP - EDI
2 stops19h 25mMultiple Airlines
sáb. 1/314:10 pmEDI - ISP
2 stops23h 55mMultiple Airlines
Deal found 12/10$1,368
This Expedia deal was found by Cheapflights users on 12/10. 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.
jue. 3/199:47 amISP - LHR
2 stops27h 03mMultiple Airlines
jue. 4/26:10 pmLHR - ISP
2 stops43h 59mMultiple Airlines
Deal found 12/10$2,032
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
vie. 1/2312:30 pmISP - LHR
1 stop13h 25mMultiple Airlines
mié. 1/2812:15 pmLHR - ISP
2 stops27h 50mMultiple Airlines
Deal found 12/10$4,873
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
vie. 1/2312:30 pmISP - LHR
1 stop13h 25mMultiple Airlines
lun. 1/268:35 pmLHR - ISP
2 stops43h 30mMultiple Airlines
Deal found 12/10$4,874
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
mié. 1/219:59 amISP - LHR
1 stop15h 56mMultiple Airlines
mié. 1/286:00 amLHR - ISP
2 stops18h 45mMultiple Airlines
Deal found 12/10$4,887
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
mar. 1/209:59 amISP - LHR
1 stop15h 56mMultiple Airlines
jue. 1/296:00 amLHR - ISP
2 stops18h 45mMultiple Airlines
Deal found 12/10$4,887
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
mié. 1/2112:30 pmISP - LHR
2 stops19h 10mMultiple Airlines
mar. 1/279:20 amLHR - ISP
1 stop11h 50mMultiple Airlines
Deal found 12/10$4,899
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
jue. 1/2212:30 pmISP - LHR
2 stops19h 10mMultiple Airlines
jue. 1/299:20 amLHR - ISP
1 stop11h 50mMultiple Airlines
Deal found 12/10$4,899
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
jue. 1/2212:30 pmISP - LHR
2 stops17h 55mMultiple Airlines
mar. 1/279:20 amLHR - ISP
1 stop11h 50mMultiple Airlines
Deal found 12/10$4,899
This Expedia deal was found by Cheapflights users on 12/11. 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.
dom. 1/2510:00 amISP - LGW
1 stop16h 30mMultiple Airlines
dom. 2/111:20 amLGW - ISP
1 stop26h 32mMultiple Airlines
Deal found 12/11$9,617

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 diciembre 12, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$1,107
(Mytrip)

Popular in

December

Cheapest in

January

Average price

$729
Provider with most accurate pricing for New York (NYC)-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-London (LON) flights.
Search Deals
From Islip Long Island to United Kingdom
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 diciembre 12, 2025.
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

dom. 1/25

12:30 pm-8:05 am

2 stops14h 35m

London Heathrow

dom. 2/1

8:50 am-7:45 pm

2 stops15h 55m

$1,107

IslipEdinburgh

ISP - EDI

ISPEDI

Islip Long Island

sáb. 1/24

7:25 am-7:50 am

2 stops19h 25m

Edinburgh Turnhouse

sáb. 1/31

4:10 pm-11:05 am

2 stops23h 55m

$1,368

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 3/19

9:47 am-4:50 pm

2 stops27h 03m

London Heathrow

jue. 4/2

6:10 pm-9:09 am

2 stops43h 59m

$2,032

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

vie. 1/23

12:30 pm-6:55 am

1 stop13h 25m

London Heathrow

mié. 1/28

12:15 pm-11:05 am

2 stops27h 50m

$4,873

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

vie. 1/23

12:30 pm-6:55 am

1 stop13h 25m

London Heathrow

lun. 1/26

8:35 pm-11:05 am

2 stops43h 30m

$4,874

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

mié. 1/21

9:59 am-6:55 am

1 stop15h 56m

London Heathrow

mié. 1/28

6:00 am-7:45 pm

2 stops18h 45m

$4,887

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

mar. 1/20

9:59 am-6:55 am

1 stop15h 56m

London Heathrow

jue. 1/29

6:00 am-7:45 pm

2 stops18h 45m

$4,887

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

mié. 1/21

12:30 pm-12:40 pm

2 stops19h 10m

London Heathrow

mar. 1/27

9:20 am-4:10 pm

1 stop11h 50m

$4,899

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 1/22

12:30 pm-12:40 pm

2 stops19h 10m

London Heathrow

jue. 1/29

9:20 am-4:10 pm

1 stop11h 50m

$4,899

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 1/22

12:30 pm-11:25 am

2 stops17h 55m

London Heathrow

mar. 1/27

9:20 am-4:10 pm

1 stop11h 50m

$4,899

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 11 results
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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 $74). Flying from Islip, New York to United Kingdom in June is currently the most expensive (average of $451). 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 $74). Flying from Islip, New York to United Kingdom in June is currently the most expensive (average of $451). 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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