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

Prices for flights from London to Islip Long Island Airport are refreshed on a daily basis.

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

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 London to Islip Long Island Airport.

What documentation or ID do you need to fly to Islip Long Island Airport?

The required travel and health documents for your Islip Long Island Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Islip Long Island Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£1,091 Cheap Flights from London to Islip, New York in 2026

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Find the cheapest flights from London to New York

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

18:45 - 20:15

LHR

ISP

30h 30m

2 stops

10:00 - 06:30

ISP

LHR

15h 30m

1 stop

£1,727Multiple Airlines

Mon, 20 Jul - Mon, 27 Jul

08:40 - 17:41

LHR

ISP

14h 01m

1 stop

10:00 - 06:30

ISP

LHR

15h 30m

1 stop

£1,808Multiple Airlines

Mon, 20 Jul - Mon, 27 Jul

09:30 - 10:56

LHR

ISP

30h 26m

3 stops

17:29 - 18:55

ISP

LHR

20h 26m

3 stops

£1,830Multiple Airlines

Sun, 19 Jul - Sun, 26 Jul

09:30 - 10:56

LHR

ISP

30h 26m

3 stops

15:05 - 10:00

ISP

LHR

13h 55m

2 stops

£1,924Multiple Airlines

Sun, 19 Jul - Sun, 26 Jul

08:40 - 18:35

LHR

ISP

14h 55m

1 stop

15:05 - 06:30

ISP

LHR

10h 25m

1 stop

£1,973Multiple Airlines

Sun, 19 Jul - Sun, 26 Jul

19:50 - 20:15

LHR

ISP

29h 25m

2 stops

15:05 - 06:30

ISP

LHR

10h 25m

1 stop

£1,998Multiple Airlines

Sun, 19 Jul - Sun, 26 Jul

08:30 - 10:56

LHR

ISP

31h 26m

2 stops

15:05 - 10:00

ISP

LHR

13h 55m

2 stops

£2,168Multiple Airlines

Sun, 19 Jul - Sun, 26 Jul

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Mon 20/7

18:45-20:15

2 stops30h 30m

Islip Long Island

Mon 27/7

10:00-06:30

1 stop15h 30m

£1,727

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Mon 20/7

08:40-17:41

1 stop14h 01m

Islip Long Island

Mon 27/7

10:00-06:30

1 stop15h 30m

£1,808

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sun 19/7

09:30-10:56

3 stops30h 26m

Islip Long Island

Sun 26/7

17:29-18:55

3 stops20h 26m

£1,830

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sun 19/7

09:30-10:56

3 stops30h 26m

Islip Long Island

Sun 26/7

15:05-10:00

2 stops13h 55m

£1,924

Fastest return journey

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sun 19/7

08:40-18:35

1 stop14h 55m

Islip Long Island

Sun 26/7

15:05-06:30

1 stop10h 25m

£1,973

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sun 19/7

19:50-20:15

2 stops29h 25m

Islip Long Island

Sun 26/7

15:05-06:30

1 stop10h 25m

£1,998

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sun 19/7

08:30-10:56

2 stops31h 26m

Islip Long Island

Sun 26/7

15:05-10:00

2 stops13h 55m

£2,168

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

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

Which airlines fly to Islip, New York?

Virgin Atlantic, British Airways and Lufthansa are the top three most popular airlines that fly to Islip, New York from London according to our data. Virgin Atlantic is the first choice among our users, with 51% of people opting to fly with this airline when travelling to Islip, New York. Keep in mind that there are 23 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

When to book flights from London to Islip, New York

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

Estimated return price

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

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

Fastest flight time	17h 09m
Direct flights	None

The fastest flight from London to Islip, New York takes 17h 09m

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

Search flight deals

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

How far is London to Islip Long Island by plane?
Islip Long Island is 3425.8 mi away from London. By plane, this route typically takes 17h 09m.
When did momondo last update prices for flights from London to Islip Long Island Airport?
Prices for flights from London to Islip Long Island Airport are refreshed on a daily basis.
How old do you have to be to fly from London to Islip Long Island Airport?
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 London to Islip Long Island Airport.
What documentation or ID do you need to fly to Islip Long Island Airport?
The required travel and health documents for your Islip Long Island Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Islip Long Island Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Riverhead

Southampton

Montauk

Why use momondo?

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

It is quick and easy to find London to Islip 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 Islip that suits you.

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

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

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

momondo helps you find the best flight between London and Islip by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for London to Islip 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.