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Cheap flights from Islip to London from £558

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 London 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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Cheap return flights

Logo
11:40 - 10:00ISP-LGW
17h 20m2 stops
Logo
14:00 - 10:37LGW-ISP
25h 37m1 stop
£558
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Thu, 13 Nov - Fri, 14 Nov
Logo
11:40 - 10:00ISP-LGW
17h 20m2 stops
Logo
14:00 - 10:37LGW-ISP
25h 37m1 stop
£559
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Thu, 13 Nov - Fri, 14 Nov
Logo
16:58 - 10:00ISP-LGW
36h 02m1 stop
Logo
13:00 - 17:42LGW-ISP
32h 42m2 stops
£583
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Wed, 22 Oct - Wed, 29 Oct
Logo
21:37 - 10:00ISP-LGW
31h 23m1 stop
Logo
14:00 - 20:42LGW-ISP
35h 42m1 stop
£584
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Thu, 16 Oct - Wed, 22 Oct
Logo
21:37 - 10:00ISP-LGW
31h 23m1 stop
Logo
13:05 - 20:42LGW-ISP
36h 37m2 stops
£613
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Thu, 16 Oct - Wed, 22 Oct

momondo Fare Finder

 
Customise your flight search to find flights from Islip to London Gatwick Airport 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 16 September 2025.
Use the filters below to find and compare flights from Islip to London Gatwick Airport 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

£558

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

£559

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Wed 22/10

16:58-10:00

1 stop36h 02m

London Gatwick

Wed 29/10

13:00-17:42

2 stops32h 42m

£583

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 16/10

21:37-10:00

1 stop31h 23m

London Gatwick

Wed 22/10

14:00-20:42

1 stop35h 42m

£584

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 16/10

21:37-10:00

1 stop31h 23m

London Gatwick

Wed 22/10

13:05-20:42

2 stops36h 37m

£613

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Islip to London Gatwick Airport

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

What is the cheapest day to depart on your flight to London Gatwick Airport?

According to our data, Thursday is the cheapest day to fly to London Gatwick Airport from Islip. The lowest ticket price found for a Thursday departure recently was £314. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Islip to London Gatwick Airport on a Sunday will generally be more expensive and average around £418. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to London Gatwick Airport?

Our data shows that the cheapest Islip to London Gatwick Airport flights are usually those with departure times in the afternoon. Our users have found flights to London Gatwick Airport in the afternoon for as low as £303. In contrast, the most expensive time of day to depart to London Gatwick Airport is in the morning when prices are around £484.

When to book flights from Islip to London Gatwick Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Islip to London Gatwick Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Islip to London Gatwick Airport (ISP to LGW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to London Gatwick Airport

Direct flights

None
There are no direct flights from Islip to London Gatwick Airport. There are no popular flight routes from Islip to London Gatwick Airport.
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  • How far is Islip Long Island to London Gatwick by plane?

    London Gatwick is 3431.0 mi away from Islip Long Island. Flights usually cover this in 17h 20m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Islip Long Island Airport to London Gatwick Airport?

    Prices for flights from Islip Long Island Airport to London Gatwick Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Islip Long Island Airport to London Gatwick Airport?

    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 London Gatwick Airport.

  • What documentation or ID do you need to fly to London Gatwick Airport?

    The necessary travel and health documents for your London Gatwick Airport 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Worthing
Chelmsford
Dover
Hayes
Dartford
Winchester
Hounslow
Stansted

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Islip to London. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Islip to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Islip to London?

momondo helps you find the best flight between Islip and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

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

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