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.

$699 Cheap Flights from Islip to London in 2026

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Find the cheapest flights from Islip, New York to London

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:33 am - 10:50 am

ISP

LHR

21h 17m2 stops

12:15 pm - 2:39 pm

LHR

ISP

31h 24m2 stops

$699Multiple Airlines

Sun, Feb 22 - Sun, Mar 1

3:34 pm - 10:00 am

ISP

LGW

13h 26m1 stop

2:00 pm - 11:06 am

LGW

ISP

26h 06m1 stop

$797Multiple Airlines

Fri, Feb 20 - Fri, Feb 27

8:33 am - 10:50 am

ISP

LGW

21h 17m2 stops

2:00 pm - 11:06 am

LGW

ISP

26h 06m1 stop

$857Multiple Airlines

Fri, Feb 20 - Fri, Feb 27

10:00 am - 11:25 am

ISP

LHR

20h 25m2 stops

5:45 pm - 8:52 am

LHR

ISP

44h 07m2 stops

$1,096Multiple Airlines

Tue, Jan 20 - Sun, Jan 25

9:59 am - 6:50 am

ISP

LHR

15h 51m1 stop

7:30 pm - 4:10 pm

LHR

ISP

25h 40m2 stops

$1,273Multiple Airlines

Sun, Feb 22 - Sun, Mar 1

9:59 am - 11:20 am

ISP

LHR

20h 21m3 stops

7:50 am - 7:45 pm

LHR

ISP

16h 55m2 stops

$1,386Multiple Airlines

Sun, Feb 22 - Sun, Mar 1

9:29 am - 7:20 pm

ISP

LHR

28h 51m2 stops

8:50 am - 8:47 am

LHR

ISP

28h 57m2 stops

$1,451Multiple Airlines

Tue, Feb 17 - Tue, Feb 24

8:33 am - 6:45 am

ISP

LHR

17h 12m1 stop

10:50 am - 2:39 pm

LHR

ISP

32h 49m1 stop

$1,581Multiple Airlines

Sun, Feb 22 - Sun, Mar 1

7:25 am - 12:40 pm

ISP

LHR

24h 15m2 stops

9:20 am - 4:10 pm

LHR

ISP

11h 50m1 stop

$1,614Multiple Airlines

Tue, Jan 20 - Sun, Jan 25

9:59 am - 11:20 am

ISP

LHR

20h 21m3 stops

6:50 am - 7:45 pm

LHR

ISP

17h 55m3 stops

$1,626Multiple Airlines

Sun, Feb 22 - Sun, Mar 1

Fly from

Fly to

Route

Depart

Return

Price

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 2/22

8:33 am-10:50 am

2 stops21h 17m

London Heathrow

Sun 3/1

12:15 pm-2:39 pm

2 stops31h 24m

$699

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 2/20

3:34 pm-10:00 am

1 stop13h 26m

London Gatwick

Fri 2/27

2:00 pm-11:06 am

1 stop26h 06m

$797

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 2/20

8:33 am-10:50 am

2 stops21h 17m

London Gatwick

Fri 2/27

2:00 pm-11:06 am

1 stop26h 06m

$857

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 1/20

10:00 am-11:25 am

2 stops20h 25m

London Heathrow

Sun 1/25

5:45 pm-8:52 am

2 stops44h 07m

$1,096

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 2/22

9:59 am-6:50 am

1 stop15h 51m

London Heathrow

Sun 3/1

7:30 pm-4:10 pm

2 stops25h 40m

$1,273

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 2/22

9:59 am-11:20 am

3 stops20h 21m

London Heathrow

Sun 3/1

7:50 am-7:45 pm

2 stops16h 55m

$1,386

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 2/17

9:29 am-7:20 pm

2 stops28h 51m

London Heathrow

Tue 2/24

8:50 am-8:47 am

2 stops28h 57m

$1,451

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 2/22

8:33 am-6:45 am

1 stop17h 12m

London Heathrow

Sun 3/1

10:50 am-2:39 pm

1 stop32h 49m

$1,581

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 1/20

7:25 am-12:40 pm

2 stops24h 15m

London Heathrow

Sun 1/25

9:20 am-4:10 pm

1 stop11h 50m

$1,614

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sun 2/22

9:59 am-11:20 am

3 stops20h 21m

London Heathrow

Sun 3/1

6:50 am-7:45 pm

3 stops17h 55m

$1,626

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 $637. 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 $621 when looking at flights departing in the morning. Flights to London are more costly in the evening, with an average ticket price of $680. 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	15h 50m
Direct flights	None

The fastest flight from Islip, New York to London takes 15h 50m

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 15h 50m.
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

Luton

Hounslow

Milton Keynes

Dover

Slough

Guildford

Hayes

Crawley

Dartford

Brentwood

Watford

Wembley

Cobham

Folkestone

Romford

Richmond

Uxbridge

Chelmsford

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?

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.