Which airlines fly to London?

Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London from Islip, New York according to our data. Virgin Atlantic is the first choice among our users, with 40% of people opting to fly with this airline when travelling to London. Keep in mind that there are 12 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Islip Long Island Airport to London are updated daily.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London 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.

£697 Cheap Flights from Islip to London in 2025/26

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Find the cheapest flights from Islip, New York to London

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12:37 - 09:00ISP-LGW

15h 23m1 stop

12:30 - 22:17LGW-ISP

14h 47m1 stop

£697Multiple Airlines

Find Deal

Wed, 17 Dec - Wed, 24 Dec

10:19 - 10:00ISP-LGW

18h 41m1 stop

14:00 - 11:25LGW-ISP

26h 25m1 stop

£829Multiple Airlines

Find Deal

Mon, 15 Dec - Mon, 22 Dec

14:25 - 10:55ISP-LGW

15h 30m2 stops

14:00 - 11:25LGW-ISP

26h 25m1 stop

£1,210Multiple Airlines

Find Deal

Mon, 15 Dec - Mon, 22 Dec

09:59 - 11:20ISP-LHR

20h 21m2 stops

06:30 - 19:45LHR-ISP

18h 15m2 stops

£1,234Multiple Airlines

Find Deal

Wed, 17 Dec - Wed, 24 Dec

09:59 - 11:20ISP-LHR

20h 21m2 stops

13:30 - 19:45LHR-ISP

11h 15m1 stop

£1,258Multiple Airlines

Find Deal

Wed, 17 Dec - Wed, 24 Dec

09:59 - 07:10ISP-LHR

16h 11m3 stops

06:30 - 19:45LHR-ISP

18h 15m2 stops

£1,375Multiple Airlines

Find Deal

Wed, 17 Dec - Wed, 24 Dec

12:40 - 11:25ISP-LHR

17h 45m2 stops

09:20 - 16:15LHR-ISP

11h 55m1 stop

£1,815Multiple Airlines

Find Deal

Thu, 18 Dec - Thu, 25 Dec

12:40 - 06:55ISP-LHR

13h 15m1 stop

09:20 - 16:15LHR-ISP

11h 55m1 stop

£1,917Multiple Airlines

Find Deal

Wed, 17 Dec - Wed, 24 Dec

12:40 - 09:15ISP-LHR

15h 35m2 stops

09:20 - 16:15LHR-ISP

11h 55m1 stop

£1,984Multiple Airlines

Find Deal

Mon, 15 Dec - Mon, 22 Dec

09:59 - 07:10ISP-LHR

16h 11m2 stops

08:50 - 19:45LHR-ISP

15h 55m2 stops

£4,202Multiple Airlines

Find Deal

Mon, 15 Dec - Mon, 22 Dec

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

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 - LHR

ISPLHR

Islip Long Island

Wed 17/12

09:59-11:20

2 stops20h 21m

London Heathrow

Wed 24/12

06:30-19:45

2 stops18h 15m

£1,234

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 17/12

09:59-11:20

2 stops20h 21m

London Heathrow

Wed 24/12

13:30-19:45

1 stop11h 15m

£1,258

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 17/12

09:59-07:10

3 stops16h 11m

London Heathrow

Wed 24/12

06:30-19:45

2 stops18h 15m

£1,375

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 18/12

12:40-11:25

2 stops17h 45m

London Heathrow

Thu 25/12

09:20-16:15

1 stop11h 55m

£1,815

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 17/12

12:40-06:55

1 stop13h 15m

London Heathrow

Wed 24/12

09:20-16:15

1 stop11h 55m

£1,917

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Mon 15/12

12:40-09:15

2 stops15h 35m

London Heathrow

Mon 22/12

09:20-16:15

1 stop11h 55m

£1,984

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Mon 15/12

09:59-07:10

2 stops16h 11m

London Heathrow

Mon 22/12

08:50-19:45

2 stops15h 55m

£4,202

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to London

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

Prices

Airlines

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

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £435. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Islip, New York to London for around £489.

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

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £434. Flights at midday are often more expensive, with an average ticket price of £513.

When to book flights from Islip, New York to London

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

Estimated return price

Cheap Islip, New York to London (ISP to LON) flight deals and tips

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

Direct flights	None

There are no direct flights from Islip, New York to London. There are no popular flight routes from Islip, New York to London.

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How far is Islip Long Island to London by plane?
The straight-line distance from Islip Long Island to London is 3425.8 mi. 13h 15m is a normal flight duration for this route.
When did momondo last update prices for flights from Islip Long Island Airport to London?
Prices for flights from Islip Long Island Airport to London are updated daily.
How old do you have to be to fly from Islip Long Island Airport to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London 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.

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Chelmsford

Worthing

Dartford

Ramsgate

Bedford

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Why use momondo?

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

It is quick and easy to find Islip to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo enables you to select and highlight flights to London from Islip with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Islip.

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

Yes momondo offers price alerts on flights to London from Islip. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.