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Cheap flights from London Heathrow Airport to New York from $1,384

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to New York departing on 5/14. 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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0 bags

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Find the cheapest flights from London Heathrow Airport to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
1:05 pm - 11:30 pm
LHR
-
ISP
15h 25m
2 stops
Multiple Airlines Logo
11:50 am - 11:55 am
ISP
-
LHR
19h 05m
2 stops
$1,384Multiple Airlines
Thu, May 14 - Sun, May 17
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 10:20 am
ISP
-
LHR
16h 50m
2 stops
$2,706Multiple Airlines
Thu, Jun 18 - Tue, Jun 23
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 6:30 am
ISP
-
LHR
13h 00m
1 stop
$2,784Multiple Airlines
Thu, Jun 18 - Mon, Jun 22
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 3:35 pm
ISP
-
LHR
22h 05m
2 stops
$2,802Multiple Airlines
Fri, Jun 19 - Wed, Jun 24
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 6:30 am
ISP
-
LHR
13h 00m
1 stop
$2,927Multiple Airlines
Thu, Jun 18 - Tue, Jun 23
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 6:30 am
ISP
-
LHR
13h 00m
1 stop
$2,949Multiple Airlines
Fri, Jun 19 - Mon, Jun 22
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 6:30 am
ISP
-
LHR
13h 00m
1 stop
$2,983Multiple Airlines
Fri, Jun 19 - Tue, Jun 23
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
7:25 am - 6:30 am
ISP
-
LHR
18h 05m
1 stop
$3,133Multiple Airlines
Thu, Jun 18 - Wed, Jun 24
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
7:25 am - 6:30 am
ISP
-
LHR
18h 05m
1 stop
$3,171Multiple Airlines
Fri, Jun 19 - Wed, Jun 24
Multiple Airlines Logo
10:05 am - 4:10 pm
LHR
-
ISP
11h 05m
1 stop
Multiple Airlines Logo
12:30 pm - 9:05 am
ISP
-
LHR
15h 35m
2 stops
$3,790Multiple Airlines
Fri, Jun 19 - Tue, Jun 23

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Islip, New York that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated May 4, 2026.
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 round-trip

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 5/14

1:05 pm-11:30 pm

2 stops15h 25m

Islip Long Island

Sun 5/17

11:50 am-11:55 am

2 stops19h 05m

$1,384

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 6/18

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Tue 6/23

12:30 pm-10:20 am

2 stops16h 50m

$2,706
Quickest round-trip

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 6/18

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Mon 6/22

12:30 pm-6:30 am

1 stop13h 00m

$2,784

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Fri 6/19

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Wed 6/24

12:30 pm-3:35 pm

2 stops22h 05m

$2,802

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 6/18

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Tue 6/23

12:30 pm-6:30 am

1 stop13h 00m

$2,927

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Fri 6/19

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Mon 6/22

12:30 pm-6:30 am

1 stop13h 00m

$2,949

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Fri 6/19

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Tue 6/23

12:30 pm-6:30 am

1 stop13h 00m

$2,983

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 6/18

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Wed 6/24

7:25 am-6:30 am

1 stop18h 05m

$3,133

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Fri 6/19

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Wed 6/24

7:25 am-6:30 am

1 stop18h 05m

$3,171

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Fri 6/19

10:05 am-4:10 pm

1 stop11h 05m

Islip Long Island

Tue 6/23

12:30 pm-9:05 am

2 stops15h 35m

$3,790

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to New York from

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

What airlines fly to Islip, New York?

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to Islip, New York from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 16 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 round-trip 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

Fastest flight time

12h 30m

Direct flights

None
The fastest flight from London Heathrow Airport to Islip, New York takes 12h 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?

    A flight from London Heathrow to Islip Long Island will travel around 3412.8 mi. In terms of flight time, this usually takes a little over 12h 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 updated daily.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for 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.

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
Montauk
Riverhead
Sag Harbor
Southampton
Amagansett

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?

momondo does allow users to show only those flights to Islip from London which offer a flexible booking policy as well as other useful filters and features.

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

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 London to Islip.

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

Of course. momondo tracks the price of London to Islip flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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