$627+ Cheap flights from Islip (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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LHR
Nov 13 — Nov 201
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Islip to United Kingdom with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 October 14, 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 October 14, 2025.
This Trip.com deal was found by Cheapflights users on 10/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:02 amISP - LGW
1 stop18h 58mMultiple Airlines
Thu 12/42:00 pmLGW - ISP
1 stop35h 14mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$627
This Trip.com deal was found by Cheapflights users on 10/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:02 amISP - LHR
2 stops24h 48mMultiple Airlines
Thu 12/48:45 amLHR - ISP
2 stops29h 26mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$849
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/2712:40 pmISP - MAN
2 stops40h 55mMultiple Airlines
Thu 12/410:30 amMAN - ISP
1 stop14h 44mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$1,056
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 10/184:58 pmISP - LGW
1 stop36h 12mMultiple Airlines
Sat 10/252:00 pmLGW - ISP
1 stop35h 52mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$1,194
This Expedia deal was found by Cheapflights users on 10/13. 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.
Sat 10/1811:35 amISP - LHR
2 stops37h 55mJetBlue
Sat 10/258:15 amLHR - ISP
2 stops33h 47mJetBlue
Deal found 10/13![JetBlue logo]()
$1,251
This Ovago deal was found by Cheapflights users on 10/13. 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.
Wed 12/3112:40 pmISP - GLA
2 stops17h 05mMultiple Airlines
Sun 1/119:20 amGLA - ISP
2 stops15h 25mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$1,317
This Ovago deal was found by Cheapflights users on 10/13. 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.
Thu 11/2712:40 pmISP - GLA
2 stops15h 50mMultiple Airlines
Thu 12/49:55 amGLA - ISP
2 stops14h 50mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$1,373
This Mytrip deal was found by Cheapflights users on 10/13. 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.
Sat 10/189:59 amISP - LHR
2 stops19h 21mMultiple Airlines
Sat 10/259:55 amLHR - ISP
3 stops38h 50mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$1,576
This Ovago deal was found by Cheapflights users on 10/13. 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.
Thu 11/2712:40 pmISP - EDI
2 stops14h 10mMultiple Airlines
Thu 12/48:20 amEDI - ISP
2 stops16h 25mMultiple Airlines
Deal found 10/13![Multiple Airlines logo]()
$1,615
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 October 14, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $627 (Trip.com) |
Popular in | December |
Cheapest in | January |
Average price | $550 |
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 October 14, 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
Thu 11/27
10:02 am-10:00 am
1 stop18h 58m
London Gatwick
Thu 12/4
2:00 pm-8:14 pm
1 stop35h 14m
$627
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
Thu 11/27
10:02 am-3:50 pm
2 stops24h 48m
London Heathrow
Thu 12/4
8:45 am-9:11 am
2 stops29h 26m
$849
IslipManchester
ISP - MAN
ISPMAN
Islip Long Island
Thu 11/27
12:40 pm-10:35 am
2 stops40h 55m
Manchester
Thu 12/4
10:30 am-8:14 pm
1 stop14h 44m
$1,056
IslipGlasgow
ISP - GLA
ISPGLA
Islip Long Island
Wed 12/31
12:40 pm-10:45 am
2 stops17h 05m
Glasgow Intl
Sun 1/11
9:20 am-7:45 pm
2 stops15h 25m
$1,317
IslipGlasgow
ISP - GLA
ISPGLA
Islip Long Island
Thu 11/27
12:40 pm-9:30 am
2 stops15h 50m
Glasgow Intl
Thu 12/4
9:55 am-7:45 pm
2 stops14h 50m
$1,373
IslipEdinburgh
ISP - EDI
ISPEDI
Islip Long Island
Thu 11/27
12:40 pm-7:50 am
2 stops14h 10m
Edinburgh Turnhouse
Thu 12/4
8:20 am-7:45 pm
2 stops16h 25m
$1,615
IslipEdinburgh
ISP - EDI
ISPEDI
Islip Long Island
Thu 2/12
12:40 pm-7:50 am
2 stops14h 10m
Edinburgh Turnhouse
Mon 2/16
4:10 pm-11:04 am
2 stops23h 54m
$1,699
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 to United Kingdom?
Currently, August is the cheapest month in which you can book a flight from Islip to United Kingdom (average of $144). Flying from Islip 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.