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Cheap flights from Islip, New York to London from £697

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to London departing on 17/12. 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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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:37 - 09:00ISP-LGW
15h 23m1 stop
Multiple Airlines Logo
12:30 - 22:17LGW-ISP
14h 47m1 stop
£697Multiple Airlines
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Wed, 17 Dec - Wed, 24 Dec
Multiple Airlines Logo
10:19 - 10:00ISP-LGW
18h 41m1 stop
Multiple Airlines Logo
14:00 - 11:25LGW-ISP
26h 25m1 stop
£829Multiple Airlines
Find Deal
Mon, 15 Dec - Mon, 22 Dec
Multiple Airlines Logo
13:27 - 10:00ISP-LGW
15h 33m1 stop
Multiple Airlines Logo
14:00 - 17:55LGW-ISP
32h 55m1 stop
£951Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
13:27 - 10:00ISP-LGW
15h 33m1 stop
Multiple Airlines Logo
20:05 - 11:04LGW-ISP
43h 59m2 stops
£1,105Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
14:25 - 10:55ISP-LGW
15h 30m2 stops
Multiple Airlines Logo
14:00 - 11:25LGW-ISP
26h 25m1 stop
£1,210Multiple Airlines
Find Deal
Mon, 15 Dec - Mon, 22 Dec
Multiple Airlines Logo
07:30 - 21:05ISP-LGW
32h 35m3 stops
Multiple Airlines Logo
16:40 - 19:45LGW-ISP
32h 05m2 stops
£1,407Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
07:30 - 19:45ISP-LGW
31h 15m3 stops
Multiple Airlines Logo
21:25 - 19:45LGW-ISP
27h 20m3 stops
£1,424Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec
Multiple Airlines Logo
07:30 - 10:55ISP-LGW
22h 25m2 stops
Multiple Airlines Logo
16:40 - 19:45LGW-ISP
32h 05m2 stops
£1,566Multiple Airlines
Find Deal
Fri, 19 Dec - Fri, 26 Dec

momondo Fare Finder

 
Customise your flight search to find flights from Islip, New York 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 4 November 2025.
Use the filters below to find and compare flights from Islip, New York to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Wed 17/12

12:37-09:00

1 stop15h 23m

London Gatwick

Wed 24/12

12:30-22:17

1 stop14h 47m

£697

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Mon 15/12

10:19-10:00

1 stop18h 41m

London Gatwick

Mon 22/12

14:00-11:25

1 stop26h 25m

£829

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 19/12

13:27-10:00

1 stop15h 33m

London Gatwick

Fri 26/12

14:00-17:55

1 stop32h 55m

£951

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 19/12

13:27-10:00

1 stop15h 33m

London Gatwick

Fri 26/12

20:05-11:04

2 stops43h 59m

£1,105

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Mon 15/12

14:25-10:55

2 stops15h 30m

London Gatwick

Mon 22/12

14:00-11:25

1 stop26h 25m

£1,210

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 19/12

07:30-21:05

3 stops32h 35m

London Gatwick

Fri 26/12

16:40-19:45

2 stops32h 05m

£1,407

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 19/12

07:30-19:45

3 stops31h 15m

London Gatwick

Fri 26/12

21:25-19:45

3 stops27h 20m

£1,424

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 19/12

07:30-10:55

2 stops22h 25m

London Gatwick

Fri 26/12

16:40-19:45

2 stops32h 05m

£1,566

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Islip, New York 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, New York. The lowest ticket price found for a Thursday departure recently was £305. 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, New York to London Gatwick Airport on a Friday will generally be more expensive and average around £436. 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, New York 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 £320. In contrast, the most expensive time of day to depart to London Gatwick Airport is in the morning when prices are around £500.

When to book flights from Islip, New York to London Gatwick Airport

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

Cheap Islip, New York 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, New York to London Gatwick Airport

Direct flights

None
There are no direct flights from Islip, New York to London Gatwick Airport. There are no popular flight routes from Islip, New York 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 15h 23m, 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
Milton Keynes
Luton
Gatwick
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Canterbury
Southend-on-Sea
Ipswich
Ilford
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Dartford
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Bedford
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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