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.

$786 Cheap Flights from Islip to London in 2026

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Find the cheapest flights from Islip, New York to London

Round-trip

One-way

Cheap round-trip flights

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11:50 am - 10:00 am

ISP

LGW

41h 10m

2 stops

2:00 pm - 9:13 am

LGW

ISP

24h 13m

1 stop

$786Multiple Airlines

ש', אפר' 25 - ש', מאי 2

11:50 am - 10:00 am

ISP

LGW

17h 10m

2 stops

2:00 pm - 9:33 am

LGW

ISP

24h 33m

1 stop

$986Multiple Airlines

ד', אפר' 22 - ד', אפר' 29

4:30 pm - 2:40 pm

ISP

LGW

17h 10m

2 stops

3:40 pm - 10:10 pm

LGW

ISP

35h 30m

2 stops

$997Multiple Airlines

ב', אפר' 27 - ב', מאי 11

4:05 pm - 11:55 am

ISP

LHR

14h 50m

2 stops

1:05 pm - 10:10 pm

LHR

ISP

14h 05m

2 stops

$1,006Multiple Airlines

ג', אפר' 7 - ג', אפר' 14

4:30 pm - 11:55 am

ISP

LHR

14h 25m

2 stops

1:05 pm - 11:30 pm

LHR

ISP

15h 25m

2 stops

$1,071Multiple Airlines

ב', אפר' 27 - ב', מאי 11

9:59 am - 6:45 am

ISP

LHR

15h 46m

1 stop

10:50 am - 9:13 am

LHR

ISP

27h 23m

2 stops

$1,092Multiple Airlines

ה', אפר' 23 - ה', אפר' 30

8:36 pm - 10:00 am

ISP

LGW

32h 24m

1 stop

1:05 pm - 9:13 am

LGW

ISP

25h 08m

2 stops

$1,307Multiple Airlines

ה', אפר' 9 - ה', אפר' 16

9:59 am - 6:45 am

ISP

LHR

15h 46m

1 stop

9:40 am - 4:10 pm

LHR

ISP

11h 30m

1 stop

$1,358Multiple Airlines

ש', אפר' 25 - ש', מאי 2

9:59 am - 8:50 am

ISP

LHR

17h 51m

2 stops

9:40 am - 4:10 pm

LHR

ISP

11h 30m

1 stop

$1,363Multiple Airlines

ש', אפר' 25 - ש', מאי 2

9:59 am - 7:10 am

ISP

LHR

16h 11m

1 stop

5:35 pm - 11:05 am

LHR

ISP

22h 30m

1 stop

$1,410Multiple Airlines

ד', אפר' 22 - ד', אפר' 29

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

ש' 4/25

11:50 am-10:00 am

2 stops41h 10m

London Gatwick

ש' 5/2

2:00 pm-9:13 am

1 stop24h 13m

$786

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

ד' 4/22

11:50 am-10:00 am

2 stops17h 10m

London Gatwick

ד' 4/29

2:00 pm-9:33 am

1 stop24h 33m

$986

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

ב' 4/27

4:30 pm-2:40 pm

2 stops17h 10m

London Gatwick

ב' 5/11

3:40 pm-10:10 pm

2 stops35h 30m

$997

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

ג' 4/7

4:05 pm-11:55 am

2 stops14h 50m

London Heathrow

ג' 4/14

1:05 pm-10:10 pm

2 stops14h 05m

$1,006

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

ב' 4/27

4:30 pm-11:55 am

2 stops14h 25m

London Heathrow

ב' 5/11

1:05 pm-11:30 pm

2 stops15h 25m

$1,071

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

ה' 4/23

9:59 am-6:45 am

1 stop15h 46m

London Heathrow

ה' 4/30

10:50 am-9:13 am

2 stops27h 23m

$1,092

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

ה' 4/9

8:36 pm-10:00 am

1 stop32h 24m

London Gatwick

ה' 4/16

1:05 pm-9:13 am

2 stops25h 08m

$1,307

Quickest round-trip

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

ש' 4/25

9:59 am-6:45 am

1 stop15h 46m

London Heathrow

ש' 5/2

9:40 am-4:10 pm

1 stop11h 30m

$1,358

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

ש' 4/25

9:59 am-8:50 am

2 stops17h 51m

London Heathrow

ש' 5/2

9:40 am-4:10 pm

1 stop11h 30m

$1,363

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

ד' 4/22

9:59 am-7:10 am

1 stop16h 11m

London Heathrow

ד' 4/29

5:35 pm-11:05 am

1 stop22h 30m

$1,410

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted 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 $628. 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 $608 when looking at flights departing in the morning. Flights to London are more costly in the evening, with an average ticket price of $676. 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	14h 25m
Direct flights	None

The fastest flight from Islip, New York to London takes 14h 25m

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

Search flight deals

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 14h 25m.
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

Crawley

Hayes

Wembley

Dartford

Croydon

Brentwood

Harrow

Watford

Guildford

Stansted

Cobham

Folkestone

Romford

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.

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ש' 4/11

ש' 4/18

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Cheap flights from Islip, New York to London from $786

This is the cheapest round-trip 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 4/25. 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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How to get the cheapest flight ticket from Islip, New York to London

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

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

What airlines fly to London?

When to book flights from Islip, New York to London

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

Direct flights

Traveling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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