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Cheap flights from Islip to the United Kingdom from £556

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Islip to the United Kingdom departing on 13/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Islip to the United Kingdom

Cheap return flights

Multiple Airlines Logo
11:40 - 10:00ISP-LGW
17h 20m2 stops
Multiple Airlines Logo
14:00 - 10:37LGW-ISP
25h 37m1 stop
£556Multiple Airlines
Find Deal
Thu, 13 Nov - Fri, 14 Nov
Multiple Airlines Logo
07:30 - 09:05ISP-LHR
20h 35m2 stops
Multiple Airlines Logo
09:50 - 19:45LHR-ISP
14h 55m2 stops
£780Multiple Airlines
Find Deal
Thu, 16 Oct - Wed, 22 Oct
Multiple Airlines Logo
07:30 - 09:55ISP-GLA
22h 25m2 stops
Multiple Airlines Logo
12:35 - 16:15GLA-ISP
32h 40m2 stops
£897Multiple Airlines
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Fri, 31 Oct - Fri, 7 Nov
Multiple Airlines Logo
12:40 - 16:00ISP-GLA
23h 20m2 stops
Multiple Airlines Logo
08:25 - 19:45GLA-ISP
40h 20m3 stops
£914Multiple Airlines
Find Deal
Fri, 31 Oct - Fri, 7 Nov
Multiple Airlines Logo
09:59 - 06:30ISP-LHR
15h 31m1 stop
Multiple Airlines Logo
06:00 - 19:45LHR-ISP
18h 45m2 stops
£1,259Multiple Airlines
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Thu, 16 Oct - Wed, 22 Oct
Multiple Airlines Logo
09:59 - 06:30ISP-LHR
15h 31m1 stop
Multiple Airlines Logo
08:25 - 16:15LHR-ISP
12h 50m1 stop
£1,450Multiple Airlines
Find Deal
Thu, 16 Oct - Wed, 22 Oct
Multiple Airlines Logo
12:40 - 11:25ISP-LHR
17h 45m2 stops
Multiple Airlines Logo
09:20 - 16:15LHR-ISP
11h 55m1 stop
£1,873Multiple Airlines
Find Deal
Thu, 13 Nov - Sun, 23 Nov

momondo Fare Finder

 
Customise 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, momondo users made 279,928 searches. Data last updated 18 September 2025.
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

Thu 13/11

11:40-10:00

2 stops17h 20m

London Gatwick

Fri 14/11

14:00-10:37

1 stop25h 37m

£556

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 16/10

07:30-09:05

2 stops20h 35m

London Heathrow

Wed 22/10

09:50-19:45

2 stops14h 55m

£780

IslipGlasgow

ISP - GLA

ISPGLA

Islip Long Island

Fri 31/10

07:30-09:55

2 stops22h 25m

Glasgow Intl

Fri 7/11

12:35-16:15

2 stops32h 40m

£897

IslipGlasgow

ISP - GLA

ISPGLA

Islip Long Island

Fri 31/10

12:40-16:00

2 stops23h 20m

Glasgow Intl

Fri 7/11

08:25-19:45

3 stops40h 20m

£914

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 16/10

09:59-06:30

1 stop15h 31m

London Heathrow

Wed 22/10

06:00-19:45

2 stops18h 45m

£1,259

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 16/10

09:59-06:30

1 stop15h 31m

London Heathrow

Wed 22/10

08:25-16:15

1 stop12h 50m

£1,450

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 13/11

12:40-11:25

2 stops17h 45m

London Heathrow

Sun 23/11

09:20-16:15

1 stop11h 55m

£1,873

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Islip to United Kingdom

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Which airlines fly to United Kingdom?

Virgin Atlantic, British Airways and Aer Lingus are the top three most popular airlines that fly to United Kingdom from Islip according to our data. Virgin Atlantic is the first choice among our users, with 39% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 12 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

Cheap Islip to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to United Kingdom

Direct flights

None
There are no direct flights from Islip to United Kingdom. There are no popular flight routes from Islip to United Kingdom.
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  • When did momondo last update prices for flights from Islip Long Island Airport to United Kingdom?

    Prices for flights from Islip Long Island Airport to United Kingdom refresh daily.

  • How old do you have to be to fly from Islip Long Island Airport to United Kingdom?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The necessary travel and health documents for your United Kingdom trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Islip to United Kingdom?

Finding the right flight to United Kingdom from Islip is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to United Kingdom quick and easy, saving you time and money.

Can I find flights from Islip to United Kingdom with flexible booking policies on momondo?

Yes. All flights to United Kingdom from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Islip to United Kingdom?

momondo provides multiple filters to help you find the best flight to United Kingdom from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Islip to United Kingdom right now. Can momondo alert me if prices change?

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Islip and alert you when they change.

An easier way to manage your United Kingdom trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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Find better results for your trip to the United Kingdom

Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
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