What airlines fly to London?

British Airways, United Airlines and American Airlines 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 40% 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.

$533 Cheap Flights from Islip, New York to London in 2026

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.

11:57 am - 10:00 am

ISP

LGW

41h 03m

2 stops

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$827Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

10:48 am - 10:00 am

ISP

LGW

18h 12m

1 stop

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$870Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

11:57 am - 10:00 am

ISP

LGW

41h 03m

2 stops

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$890Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

10:48 am - 10:00 am

ISP

LGW

18h 12m

1 stop

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$902Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

11:57 am - 10:00 am

ISP

LGW

41h 03m

2 stops

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$960Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

5:27 pm - 10:00 am

ISP

LGW

35h 33m

2 stops

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$1,033Multiple Airlines

Tue, Jul 28 - Tue, Aug 4

10:48 am - 10:00 am

ISP

LGW

18h 12m

1 stop

2:00 pm - 9:53 am

LGW

ISP

24h 53m

1 stop

$1,046Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

11:55 am - 11:45 am

ISP

LGW

18h 50m

2 stops

3:40 pm - 10:05 pm

LGW

ISP

35h 25m

2 stops

$1,105Multiple Airlines

Sat, Aug 22 - Sun, Aug 30

3:15 pm - 11:55 am

ISP

LHR

15h 40m

2 stops

9:25 pm - 10:05 pm

LHR

ISP

29h 40m

2 stops

$1,159Multiple Airlines

Sat, Aug 22 - Sun, Aug 30

2:11 pm - 6:45 am

ISP

LHR

11h 34m

1 stop

9:50 am - 8:15 pm

LHR

ISP

15h 25m

2 stops

$1,414Multiple Airlines

Tue, Jul 28 - Tue, Aug 4

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 7/4

11:57 am-10:00 am

2 stops41h 03m

London Gatwick

Fri 7/10

2:00 pm-9:53 am

1 stop24h 53m

$827

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 7/4

10:48 am-10:00 am

1 stop18h 12m

London Gatwick

Fri 7/10

2:00 pm-9:53 am

1 stop24h 53m

$870

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 7/4

11:57 am-10:00 am

2 stops41h 03m

London Gatwick

Fri 7/10

2:00 pm-9:53 am

1 stop24h 53m

$890

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 7/4

10:48 am-10:00 am

1 stop18h 12m

London Gatwick

Fri 7/10

2:00 pm-9:53 am

1 stop24h 53m

$902

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 7/4

11:57 am-10:00 am

2 stops41h 03m

London Gatwick

Fri 7/10

2:00 pm-9:53 am

1 stop24h 53m

$960

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Tue 7/28

5:27 pm-10:00 am

2 stops35h 33m

London Gatwick

Tue 8/4

2:00 pm-9:53 am

1 stop24h 53m

$1,033

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 7/4

10:48 am-10:00 am

1 stop18h 12m

London Gatwick

Fri 7/10

2:00 pm-9:53 am

1 stop24h 53m

$1,046

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 8/22

11:55 am-11:45 am

2 stops18h 50m

London Gatwick

Sun 8/30

3:40 pm-10:05 pm

2 stops35h 25m

$1,105

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sat 8/22

3:15 pm-11:55 am

2 stops15h 40m

London Heathrow

Sun 8/30

9:25 pm-10:05 pm

2 stops29h 40m

$1,159

Quickest round-trip

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 7/28

2:11 pm-6:45 am

1 stop11h 34m

London Heathrow

Tue 8/4

9:50 am-8:15 pm

2 stops15h 25m

$1,414

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 $664. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $731. 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 $654 when looking at flights departing in the morning. Flights to London are more costly in the evening, with an average ticket price of $719. 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 40m
Direct flights	None

The fastest flight from Islip, New York to London takes 15h 40m

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

Frequently asked questions about flying from Islip, New York to London

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 40m.
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.

Hounslow

Gatwick

Milton Keynes

Luton

Dover

Hayes

Crawley

Croydon

Wembley

Stansted

Harrow

Slough

Brentwood

Watford

Cobham

Guildford

Folkestone

Uxbridge

Romford

Chelmsford

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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Cheap flights from Islip, New York to London from $533

This is the cheapest one-way 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 8/3. 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

Frequently asked questions about flying from Islip, New York to London

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

Cabin classes currently available on flights to London

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

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