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

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

How old do you have to be to fly from London Heathrow Airport 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 Heathrow Airport 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.

£750 Cheap Flights from London Heathrow Airport to Islip, New York in 2026/27

Find the cheapest flights from London Heathrow Airport to New York

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

12:15 - 21:45LHR London Heathrow-ISP Islip Long Island

14h 30m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:30 - 19:30ISP Islip Long Island-LHR London Heathrow

26h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£762Multiple Airlines

Tue, 10 Nov - Tue, 17 Nov

20:35 - 21:30LHR London Heathrow-ISP Islip Long Island

29h 55m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:20 - 11:55ISP Islip Long Island-LHR London Heathrow

18h 35m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£768Multiple Airlines

Mon, 8 Mar - Tue, 30 Mar

12:15 - 23:50LHR London Heathrow-ISP Islip Long Island

16h 35m2 stops Reykjavik Keflavik Intl Baltimore/Washington

09:50 - 10:50ISP Islip Long Island-LHR London Heathrow

21h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£799Multiple Airlines

Fri, 12 Mar - Tue, 16 Mar

12:15 - 21:45LHR London Heathrow-ISP Islip Long Island

14h 30m2 stops Reykjavik Keflavik Intl Baltimore/Washington

16:05 - 19:30ISP Islip Long Island-LHR London Heathrow

22h 25m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£804Multiple Airlines

Wed, 18 Nov - Tue, 1 Dec

20:35 - 21:45LHR London Heathrow-ISP Islip Long Island

30h 10m2 stops Reykjavik Keflavik Intl Baltimore/Washington

16:05 - 19:30ISP Islip Long Island-LHR London Heathrow

22h 25m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£804Multiple Airlines

Tue, 17 Nov - Tue, 1 Dec

12:15 - 21:45LHR London Heathrow-ISP Islip Long Island

14h 30m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:10 - 10:50ISP Islip Long Island-LHR London Heathrow

17h 40m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£1,034Multiple Airlines

Wed, 9 Dec - Sun, 20 Dec

12:15 - 21:45LHR London Heathrow-ISP Islip Long Island

14h 30m2 stops Reykjavik Keflavik Intl Baltimore/Washington

16:55 - 19:30ISP Islip Long Island-LHR London Heathrow

21h 35m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£1,035Multiple Airlines

Tue, 17 Nov - Mon, 30 Nov

12:15 - 23:35LHR London Heathrow-ISP Islip Long Island

16h 20m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:25 - 19:30ISP Islip Long Island-LHR London Heathrow

26h 05m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£1,085Multiple Airlines

Fri, 13 Nov - Sun, 15 Nov

12:15 - 23:35LHR London Heathrow-ISP Islip Long Island

16h 20m2 stops Reykjavik Keflavik Intl Baltimore/Washington

16:05 - 10:50ISP Islip Long Island-LHR London Heathrow

13h 45m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£1,115Multiple Airlines

Thu, 12 Nov - Thu, 19 Nov

12:15 - 23:50LHR London Heathrow-ISP Islip Long Island

16h 35m2 stops Reykjavik Keflavik Intl Baltimore/Washington

12:25 - 10:50ISP Islip Long Island-LHR London Heathrow

17h 25m2 stops Baltimore/Washington Reykjavik Keflavik Intl

£1,231Multiple Airlines

Wed, 23 Dec - Mon, 4 Jan

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Tue 10/11

12:15-21:45

2 stops14h 30m

Islip Long Island

Tue 17/11

12:30-19:30

2 stops26h 00m

£762

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Mon 8/3

20:35-21:30

2 stops29h 55m

Islip Long Island

Tue 30/3

12:20-11:55

2 stops18h 35m

£768

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Fri 12/3

12:15-23:50

2 stops16h 35m

Islip Long Island

Tue 16/3

09:50-10:50

2 stops21h 00m

£799

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Wed 18/11

12:15-21:45

2 stops14h 30m

Islip Long Island

Tue 1/12

16:05-19:30

2 stops22h 25m

£804

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Tue 17/11

20:35-21:45

2 stops30h 10m

Islip Long Island

Tue 1/12

16:05-19:30

2 stops22h 25m

£804

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Wed 9/12

12:15-21:45

2 stops14h 30m

Islip Long Island

Sun 20/12

12:10-10:50

2 stops17h 40m

£1,034

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Tue 17/11

12:15-21:45

2 stops14h 30m

Islip Long Island

Mon 30/11

16:55-19:30

2 stops21h 35m

£1,035

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Fri 13/11

12:15-23:35

2 stops16h 20m

Islip Long Island

Sun 15/11

12:25-19:30

2 stops26h 05m

£1,085

Fastest return journey

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Thu 12/11

12:15-23:35

2 stops16h 20m

Islip Long Island

Thu 19/11

16:05-10:50

2 stops13h 45m

£1,115

LondonIslip

LHR London Heathrow - ISP Islip Long Island

LHRISP

London Heathrow

Wed 23/12

12:15-23:50

2 stops16h 35m

Islip Long Island

Mon 4/1

12:25-10:50

2 stops17h 25m

£1,231

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport 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 Heathrow Airport according to our data. Virgin Atlantic is the first choice among our users, with 44% of people opting to fly with this airline when travelling to Islip, New York. Keep in mind that there are 20 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 Heathrow Airport to Islip, New York

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

Estimated return price

Cheap London Heathrow Airport to Islip, New York (LHR to ISP) flight deals and tips

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

Best price found	£750
Fastest flight time	14h 30m
Direct flights	None

The best one-way flight to Islip, New York from London Heathrow Airport in the past 72 hours is £750. The best return flight deal from London Heathrow Airport to Islip, New York found on momondo in the last 72 hours is £762.

The fastest flight from London Heathrow Airport to Islip, New York takes 14h 30m

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

Search flight deals

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

How far is London Heathrow to Islip Long Island by plane?
There are 3412.8 mi between London Heathrow and Islip Long Island. By plane, this route typically takes 14h 30m.
When did momondo last update prices for flights from London Heathrow Airport to Islip Long Island Airport?
Prices for flights from London Heathrow Airport to Islip Long Island Airport are refreshed on a daily basis.
How old do you have to be to fly from London Heathrow Airport 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 Heathrow Airport 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

Montauk

Southampton

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Islip. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for London to Islip flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Islip from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Islip, momondo offers a useful price alert feature which will track prices for flights to Islip from London and alert you when they change.