$321+ Cheap flights from Islip (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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
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.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 septiembre 3, 2025.
Round-trip from | $904 (Kiwi.com) |
|---|---|
One-way from | $321 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $515 |
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 septiembre 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 septiembre 3, 2025.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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.
This Mytrip deal was found by Cheapflights users on 8/31. 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.
This Mytrip deal was found by Cheapflights users on 9/1. 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.
This Mytrip deal was found by Cheapflights users on 9/1. 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.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Islip to the United Kingdom that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
IslipLondon
ISP - LGW
ISPLGW
Islip Long Island
vie. 10/17
4:58 pm-10:00 am
1 stop36h 02m
London Gatwick
vie. 10/24
2:00 pm-10:37 am
1 stop25h 37m
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
dom. 9/14
4:33 pm-12:40 pm
2 stops15h 07m
London Heathrow
mié. 9/17
9:50 am-8:01 pm
2 stops15h 11m
IslipEdinburgh
ISP - EDI
ISPEDI
Islip Long Island
vie. 10/17
7:30 am-7:20 am
2 stops18h 50m
Edinburgh Turnhouse
vie. 10/24
8:40 am-8:01 pm
2 stops16h 21m
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
vie. 10/17
2:19 pm-9:05 am
2 stops13h 46m
London Heathrow
vie. 10/24
6:00 am-8:01 pm
2 stops19h 01m
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
mié. 11/26
2:19 pm-6:55 pm
2 stops23h 36m
London Heathrow
dom. 11/30
9:20 am-3:21 pm
1 stop11h 01m
IslipGlasgow
ISP - GLA
ISPGLA
Islip Long Island
mié. 10/15
4:58 pm-10:20 pm
3 stops48h 22m
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
lun. 9/22
4:33 pm-11:55 am
2 stops14h 22m
IslipLondon
ISP - LGW
ISPLGW
Islip Long Island
lun. 9/22
4:33 pm-2:35 pm
2 stops17h 02m
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
jue. 12/4
4:33 pm-9:15 am
2 stops11h 42m
IslipLondon
ISP - LHR
ISPLHR
Islip Long Island
lun. 1/5
4:33 pm-9:15 am
2 stops11h 42m
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.
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, November is the cheapest month in which you can book a flight from Islip to United Kingdom (average of $661). Flying from Islip to United Kingdom in June is currently the most expensive (average of $1,097). 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.