What airlines fly to London?

British Airways, United Airlines and Virgin Atlantic are the top three most popular airlines that fly to London from Islip, New York according to our data. British Airways is the first choice among our users, with 48% of people opting to fly with this airline when traveling to London. Keep in mind that there are 22 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 refreshed on a daily basis.

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.

$990 Cheap Flights from Islip to London in 2026

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0 bags

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Find the cheapest flights from Islip, New York to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:26 pm - 10:00 am

ISP

LGW

34h 34m

2 stops

2:00 pm - 12:47 pm

LGW

ISP

26h 47m

1 stop

$990Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

9:45 am - 10:00 am

ISP

LGW

20h 15m

1 stop

2:00 pm - 8:55 am

LGW

ISP

22h 55m

1 stop

$1,116Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

9:59 am - 7:50 am

ISP

LHR

17h 51m

1 stop

8:45 am - 12:47 pm

LHR

ISP

32h 02m

2 stops

$1,121Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

9:59 am - 7:10 am

ISP

LHR

17h 11m

2 stops

8:35 pm - 6:44 pm

LHR

ISP

26h 09m

2 stops

$1,226Multiple Airlines

Wed, Mar 11 - Wed, Mar 18

9:59 am - 10:05 am

ISP

LHR

20h 06m

3 stops

8:35 pm - 6:44 pm

LHR

ISP

26h 09m

2 stops

$1,257Multiple Airlines

Wed, Mar 11 - Wed, Mar 18

9:59 am - 7:50 am

ISP

LHR

17h 51m

1 stop

9:40 am - 6:44 pm

LHR

ISP

13h 04m

1 stop

$1,262Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

9:59 am - 7:00 am

ISP

LHR

17h 01m

1 stop

11:40 am - 6:44 pm

LHR

ISP

11h 04m

1 stop

$1,298Multiple Airlines

Wed, Mar 11 - Wed, Mar 18

9:59 am - 6:55 am

ISP

LHR

16h 56m

1 stop

1:40 pm - 6:44 pm

LHR

ISP

33h 04m

2 stops

$1,543Multiple Airlines

Wed, Mar 11 - Wed, Mar 18

9:59 am - 7:10 am

ISP

LHR

17h 11m

2 stops

6:30 am - 6:44 pm

LHR

ISP

16h 14m

2 stops

$1,553Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

9:59 am - 10:05 am

ISP

LHR

20h 06m

3 stops

6:30 am - 6:44 pm

LHR

ISP

16h 14m

2 stops

$1,583Multiple Airlines

Thu, Mar 12 - Thu, Mar 19

Fly from

Fly to

Route

Depart

Return

Price

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 3/12

7:26 pm-10:00 am

2 stops34h 34m

London Gatwick

Thu 3/19

2:00 pm-12:47 pm

1 stop26h 47m

$990

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 3/12

9:45 am-10:00 am

1 stop20h 15m

London Gatwick

Thu 3/19

2:00 pm-8:55 am

1 stop22h 55m

$1,116

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 3/12

9:59 am-7:50 am

1 stop17h 51m

London Heathrow

Thu 3/19

8:45 am-12:47 pm

2 stops32h 02m

$1,121

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 3/11

9:59 am-7:10 am

2 stops17h 11m

London Heathrow

Wed 3/18

8:35 pm-6:44 pm

2 stops26h 09m

$1,226

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 3/11

9:59 am-10:05 am

3 stops20h 06m

London Heathrow

Wed 3/18

8:35 pm-6:44 pm

2 stops26h 09m

$1,257

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 3/12

9:59 am-7:50 am

1 stop17h 51m

London Heathrow

Thu 3/19

9:40 am-6:44 pm

1 stop13h 04m

$1,262

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 3/11

9:59 am-7:00 am

1 stop17h 01m

London Heathrow

Wed 3/18

11:40 am-6:44 pm

1 stop11h 04m

$1,298

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 3/11

9:59 am-6:55 am

1 stop16h 56m

London Heathrow

Wed 3/18

1:40 pm-6:44 pm

2 stops33h 04m

$1,543

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 3/12

9:59 am-7:10 am

2 stops17h 11m

London Heathrow

Thu 3/19

6:30 am-6:44 pm

2 stops16h 14m

$1,553

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 3/12

9:59 am-10:05 am

3 stops20h 06m

London Heathrow

Thu 3/19

6:30 am-6:44 pm

2 stops16h 14m

$1,583

Flights are sorted by cheapest round-trip 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?

The cheapest day to depart from Islip, New York to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $634. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $692. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Islip, New York in the morning is the least expensive time of day to depart. momondo users have found prices as low as $620 when looking at flights departing in the morning. Flights to London are more costly in the evening, with an average ticket price of $679. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 round-trip 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

Fastest flight time	17h 01m
Direct flights	None

The fastest flight from Islip, New York to London takes 17h 01m

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 distance between Islip Long Island and London is about 3425.8 mi. In terms of flight time, this usually takes a little over 17h 01m.
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 refreshed on a daily basis.
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.

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Guildford

Crawley

Wembley

Dartford

Hayes

Brentwood

Harrow

Watford

Cobham

Folkestone

Romford

Stansted

Croydon

Richmond

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?

All flight searches from Islip to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to London.

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

Yes. momondo can track prices for Islip to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.