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Cheap flights from London Heathrow Airport to New York from $831

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 4/29. 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
12:15 pm - 9:33 am
LHR
-
ISP
26h 18m
2 stops
Multiple Airlines Logo
11:00 am - 10:40 am
ISP
-
LHR
18h 40m
2 stops
$831Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
8:25 pm - 9:13 am
LHR
-
ISP
41h 48m
2 stops
Multiple Airlines Logo
12:30 pm - 6:45 am
ISP
-
LHR
13h 15m
1 stop
$1,139Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
6:30 pm - 9:33 am
LHR
-
ISP
44h 03m
2 stops
Multiple Airlines Logo
12:30 pm - 6:45 am
ISP
-
LHR
13h 15m
1 stop
$1,226Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
12:15 pm - 9:13 am
LHR
-
ISP
25h 58m
2 stops
Multiple Airlines Logo
11:00 am - 12:40 pm
ISP
-
LHR
20h 40m
2 stops
$1,242Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
8:25 pm - 9:13 am
LHR
-
ISP
41h 48m
2 stops
Multiple Airlines Logo
6:43 pm - 9:50 am
ISP
-
LHR
34h 07m
1 stop
$1,338Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
1:05 pm - 10:35 pm
LHR
-
ISP
14h 30m
2 stops
Multiple Airlines Logo
3:20 pm - 11:55 am
ISP
-
LHR
15h 35m
2 stops
$1,682Multiple Airlines
Wed, Jul 15 - Tue, Sep 1
Multiple Airlines Logo
10:50 am - 9:13 am
LHR
-
ISP
27h 23m
2 stops
Multiple Airlines Logo
12:30 pm - 6:30 am
ISP
-
LHR
13h 00m
1 stop
$1,803Multiple Airlines
Thu, Apr 30 - Thu, May 7
Multiple Airlines Logo
8:40 am - 4:10 pm
LHR
-
ISP
12h 30m
1 stop
Multiple Airlines Logo
12:30 pm - 6:45 am
ISP
-
LHR
13h 15m
1 stop
$2,124Multiple Airlines
Wed, Apr 29 - Wed, May 6
Multiple Airlines Logo
1:05 pm - 9:08 am
LHR
-
ISP
25h 03m
2 stops
Multiple Airlines Logo
10:03 am - 7:55 am
ISP
-
LHR
16h 52m
1 stop
$2,150Multiple Airlines
Fri, Aug 21 - Mon, Aug 31
Multiple Airlines Logo
8:40 am - 6:44 pm
LHR
-
ISP
15h 04m
1 stop
Multiple Airlines Logo
12:30 pm - 6:45 am
ISP
-
LHR
13h 15m
1 stop
$2,194Multiple Airlines
Tue, Apr 28 - Tue, May 5

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 March 20, 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

Wed 4/29

12:15 pm-9:33 am

2 stops26h 18m

Islip Long Island

Wed 5/6

11:00 am-10:40 am

2 stops18h 40m

$831

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 4/29

8:25 pm-9:13 am

2 stops41h 48m

Islip Long Island

Wed 5/6

12:30 pm-6:45 am

1 stop13h 15m

$1,139

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Tue 4/28

6:30 pm-9:33 am

2 stops44h 03m

Islip Long Island

Tue 5/5

12:30 pm-6:45 am

1 stop13h 15m

$1,226

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sat 5/2

12:15 pm-9:13 am

2 stops25h 58m

Islip Long Island

Sat 5/9

11:00 am-12:40 pm

2 stops20h 40m

$1,242

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Sat 5/2

8:25 pm-9:13 am

2 stops41h 48m

Islip Long Island

Sat 5/9

6:43 pm-9:50 am

1 stop34h 07m

$1,338

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 7/15

1:05 pm-10:35 pm

2 stops14h 30m

Islip Long Island

Tue 9/1

3:20 pm-11:55 am

2 stops15h 35m

$1,682

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Thu 4/30

10:50 am-9:13 am

2 stops27h 23m

Islip Long Island

Thu 5/7

12:30 pm-6:30 am

1 stop13h 00m

$1,803
Quickest round-trip

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Wed 4/29

8:40 am-4:10 pm

1 stop12h 30m

Islip Long Island

Wed 5/6

12:30 pm-6:45 am

1 stop13h 15m

$2,124

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Fri 8/21

1:05 pm-9:08 am

2 stops25h 03m

Islip Long Island

Mon 8/31

10:03 am-7:55 am

1 stop16h 52m

$2,150

LondonIslip

LHR - ISP

LHRISP

London Heathrow

Tue 4/28

8:40 am-6:44 pm

1 stop15h 04m

Islip Long Island

Tue 5/5

12:30 pm-6:45 am

1 stop13h 15m

$2,194

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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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 48% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 17 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

14h 30m

Direct flights

None
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

  • 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 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 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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