$201+ 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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LHR
Jul 8 — Jul 151
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 July 3, 2025.
Round-trip from | $728 (Kiwi.com) |
|---|---|
One-way from | $201 (Lucky2Go) |
Popular in | June |
Cheapest in | January |
Average price | $630 |
Find flight deals from Islip to United Kingdom
Cheapest flights from Islip to United KingdomExplore 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 July 3, 2025.
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 July 3, 2025.
This Kiwi.com deal was found by Cheapflights users on 7/3. 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.
Sun 8/176:00 amISP - LGW
1 stop23h 10mMultiple Airlines
Sun 8/242:00 pmLGW - ISP
1 stop23h 08mMultiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$728
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sat 8/162:19 pmISP - LHR
1 stop12h 01mMultiple Airlines
Sat 8/239:25 pmLHR - ISP
2 stops39h 43mMultiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,272
This Gurufare deal was found by Cheapflights users on 7/2. 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.
Sat 8/164:33 pmISP - GLA
2 stops13h 42mMultiple Airlines
Sat 8/237:45 pmGLA - ISP
2 stops24h 36mMultiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,279
This Ovago deal was found by Cheapflights users on 7/2. 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.
Sun 8/177:30 amISP - EDI
2 stops18h 40mMultiple Airlines
Sun 8/249:05 pmEDI - ISP
2 stops23h 16mMultiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,633
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Sat 8/167:30 amISP - MAN
2 stops19h 05mMultiple Airlines
Sat 8/2311:00 amMAN - ISP
1 stop36h 48mMultiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,773
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 July 3, 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
Sun 8/17
6:00 am-10:10 am
1 stop23h 10m
London Gatwick
Sun 8/24
2:00 pm-8:08 am
1 stop23h 08m
$728
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
Sat 8/16
2:19 pm-7:20 am
1 stop12h 01m
London Heathrow
Sat 8/23
9:25 pm-8:08 am
2 stops39h 43m
$1,272
IslipGlasgow
ISP - GLA
ISPGLA
Islip Long Island
Sat 8/16
4:33 pm-11:15 am
2 stops13h 42m
Glasgow Intl
Sat 8/23
7:45 pm-3:21 pm
2 stops24h 36m
$1,279
IslipEdinburgh
ISP - EDI
ISPEDI
Islip Long Island
Sun 8/17
7:30 am-7:10 am
2 stops18h 40m
Edinburgh Turnhouse
Sun 8/24
9:05 pm-3:21 pm
2 stops23h 16m
$1,633
IslipManchester
ISP - MAN
ISPMAN
Islip Long Island
Sat 8/16
7:30 am-7:35 am
2 stops19h 05m
Manchester
Sat 8/23
11:00 am-6:48 pm
1 stop36h 48m
$1,773
IslipLondon
ISP - LGW
ISPLGW
Islip Long Island
Sat 8/2
8:37 pm-10:10 am
1 stop32h 33m
$201
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
Sat 9/6
7:30 am-9:35 am
2 stops21h 05m
$515
IslipManchester
ISP - MAN
ISPMAN
Islip Long Island
Wed 7/30
2:19 pm-7:35 am
2 stops12h 16m
$1,514
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 $661). Flying from Islip, New York to United Kingdom in June is currently the most expensive (average of $1,098). 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.