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$730+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LHR
dic. 6 — dic. 131
sáb. 12/6
sáb. 12/13
1 adult, Economy
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Find 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 noviembre 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
dom. 11/169:27 pmISP - LGW
1 stop31h 33mMultiple Airlines
lun. 11/242:00 pmLGW - ISP
1 stop25h 18mMultiple Airlines
Deal found 11/6$730
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
dom. 12/218:35 pmISP - LGW
1 stop32h 25mMultiple Airlines
dom. 12/282:10 pmLGW - ISP
1 stop27h 59mMultiple Airlines
Deal found 11/6$922
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
sáb. 12/202:19 pmISP - LGW
2 stops38h 41mMultiple Airlines
sáb. 12/272:00 pmLGW - ISP
1 stop28h 09mMultiple Airlines
Deal found 11/5$1,110
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
lun. 12/810:19 amISP - MAN
1 stop15h 41mMultiple Airlines
vie. 12/127:40 pmMAN - ISP
2 stops44h 24mMultiple Airlines
Deal found 11/5$1,120
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
lun. 12/810:19 amISP - MAN
1 stop15h 41mMultiple Airlines
mar. 12/1612:30 pmMAN - ISP
2 stops32h 45mMultiple Airlines
Deal found 11/5$1,124
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
lun. 12/810:19 amISP - MAN
1 stop15h 41mMultiple Airlines
sáb. 12/1312:30 pmMAN - ISP
2 stops27h 34mMultiple Airlines
Deal found 11/5$1,144
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
lun. 12/810:19 amISP - MAN
1 stop15h 41mMultiple Airlines
dom. 12/146:40 amMAN - ISP
2 stops36h 05mMultiple Airlines
Deal found 11/5$1,164
This Kiwi.com deal was found by Cheapflights users on 11/5. 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. 12/410:19 amISP - MAN
1 stop15h 41mMultiple Airlines
mar. 12/1612:30 pmMAN - ISP
2 stops27h 34mMultiple Airlines
Deal found 11/5$1,368
This Kiwi.com deal was found by Cheapflights users on 11/5. 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. 12/410:19 amISP - MAN
1 stop15h 41mMultiple Airlines
sáb. 12/1312:30 pmMAN - ISP
2 stops27h 34mMultiple Airlines
Deal found 11/5$1,389
This Kiwi.com deal was found by Cheapflights users on 11/5. 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. 12/410:19 amISP - MAN
1 stop15h 41mMultiple Airlines
dom. 12/143:45 pmMAN - ISP
2 stops56h 49mMultiple Airlines
Deal found 11/5$1,424
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
sáb. 12/64:05 pmISP - MAN
2 stops40h 10mMultiple Airlines
sáb. 12/1310:30 amMAN - ISP
1 stop28h 50mMultiple Airlines
Deal found 11/5$1,426
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
dom. 12/712:07 pmISP - MAN
2 stops39h 13mMultiple Airlines
sáb. 12/1310:30 amMAN - ISP
1 stop28h 50mMultiple Airlines
Deal found 11/5$1,431

Cheap 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 noviembre 6, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$730
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$517
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, 4% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 noviembre 6, 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 - LGW

ISPLGW

Islip Long Island

dom. 11/16

9:27 pm-10:00 am

1 stop31h 33m

London Gatwick

lun. 11/24

2:00 pm-10:18 am

1 stop25h 18m

$730

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

dom. 12/21

8:35 pm-10:00 am

1 stop32h 25m

London Gatwick

dom. 12/28

2:10 pm-1:09 pm

1 stop27h 59m

$922

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

sáb. 12/20

2:19 pm-10:00 am

2 stops38h 41m

London Gatwick

sáb. 12/27

2:00 pm-1:09 pm

1 stop28h 09m

$1,110

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

lun. 12/8

10:19 am-7:00 am

1 stop15h 41m

Manchester

vie. 12/12

7:40 pm-11:04 am

2 stops44h 24m

$1,120

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

lun. 12/8

10:19 am-7:00 am

1 stop15h 41m

Manchester

mar. 12/16

12:30 pm-4:15 pm

2 stops32h 45m

$1,124

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

jue. 12/4

10:19 am-7:00 am

1 stop15h 41m

Manchester

mar. 12/16

12:30 pm-11:04 am

2 stops27h 34m

$1,368

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

jue. 12/4

10:19 am-7:00 am

1 stop15h 41m

Manchester

sáb. 12/13

12:30 pm-11:04 am

2 stops27h 34m

$1,389

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

jue. 12/4

10:19 am-7:00 am

1 stop15h 41m

Manchester

dom. 12/14

3:45 pm-7:34 pm

2 stops56h 49m

$1,424

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

sáb. 12/6

4:05 pm-1:15 pm

2 stops40h 10m

Manchester

sáb. 12/13

10:30 am-10:20 am

1 stop28h 50m

$1,426

IslipManchester

ISP - MAN

ISPMAN

Islip Long Island

dom. 12/7

12:07 pm-8:20 am

2 stops39h 13m

Manchester

sáb. 12/13

10:30 am-10:20 am

1 stop28h 50m

$1,431

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 18 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, August is the cheapest month in which you can book a flight from Islip, New York to United Kingdom (average of $144). Flying from Islip, New York to United Kingdom in June is currently the most expensive (average of $480). 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 - Belfast Intl, Islip Long Island - Belfast City or Islip Long Island - Edinburgh Turnhouse 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, August is the cheapest month in which you can book a flight from Islip, New York to United Kingdom (average of $144). Flying from Islip, New York to United Kingdom in June is currently the most expensive (average of $480). 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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