Find Cheap Flights from Islip Long Island to London Heathrow (ISP - LHR)

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Looking for a cheap flight? 25% of our users found flights on this route for $815 or less.

FAQs for Booking Islip Long Island to London Heathrow Flights

How long does a flight from Islip Long Island to London Heathrow take?
An average nonstop flight takes 9h 40m, covering a distance of 3408 miles.
Which airlines provide the cheapest flights from Islip Long Island to London Heathrow?
In the past 3 days, the cheapest round-trip tickets were found on American Airlines ($689) and Multiple Airlines ($830)
Do I need a passport to fly between Islip Long Island and London Heathrow?
Yes.

Book cheap flights from Islip Long Island to London Heathrow (round-trip)

Airports
Origin
Islip
$689
only
$689
Destination
London
$689
only
$689
Mon, Apr 2
ISP
LHR
13h 09m
Tue, Apr 10
LHR
ISP
26h 03m
Trip: 9 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
LHR
ORD
Mediocre 2.0

Nothing really. I will never book from Kayak ever

Everything

ORD
CLT
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

SJU
MIA
Excellent 9.3

New onboard entertainment

LAS
DFW
Excellent 8.0

Flight was punctual and service was good.

Gate change

JAX
DFW
Excellent 8.6

Polite. Clean. Nice business class.

Would like more Western food.

Wed, Jun 20
ISP
LHR
13h 35m
Wed, Jul 4
LHR
ISP
14h 57m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Tue, May 1
ISP
LHR
20h 44m
Tue, May 8
LHR
ISP
26h 01m
Trip: 8 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
SJU
MIA
Excellent 9.3

New onboard entertainment

PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

PHL
YYZ
Good 6.0

On time

Small seats

DCA
CLT
Excellent 8.6

My wife is hypoglycemic and requires food. The flight was so early that none of the terminal restaraunts were open, nor did the plain have food for any passengers accept first class. I've purchased a box on other flights, but this one did not provide an option for a box lunch or breakfast.

Sun, Jul 22
ISP
LHR
10h 55m
Thu, Aug 9
LHR
ISP
15h 27m
Trip: 19 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
DCA
CLT
Excellent 8.6

My wife is hypoglycemic and requires food. The flight was so early that none of the terminal restaraunts were open, nor did the plain have food for any passengers accept first class. I've purchased a box on other flights, but this one did not provide an option for a box lunch or breakfast.

SJU
MIA
Excellent 9.3

New onboard entertainment

PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

CLT
LGA
Excellent 10.0

Ability to upgrade to first class

Security taking forever

PHL
YYZ
Good 6.0

On time

Small seats

Sat, Jun 30
ISP
LHR
32h 25m
Mon, Jul 16
LHR
ISP
26h 22m
Trip: 17 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

JAX
DFW
Excellent 8.6

Polite. Clean. Nice business class.

Would like more Western food.

PHL
YYZ
Good 6.0

On time

Small seats

PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

SAT
PHL
Excellent 8.0

I took American's first direct flight between Philadelphia and San Antonio. It was a nice plane, good service, and amenities for a cost. Love that the plane had plugs!

Thu, Mar 8
ISP
LHR
11h 54m
Thu, Mar 15
LHR
ISP
13h 24m
Trip: 7 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
ORD
CLT
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

CLT
LGA
Excellent 10.0

Ability to upgrade to first class

Security taking forever

PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

LAS
DFW
Excellent 8.0

Flight was punctual and service was good.

Gate change

Thu, Aug 9
ISP
LHR
9h 40m
Sun, Aug 19
LHR
ISP
12h 30m
Trip: 11 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
SJU
MIA
Excellent 9.3

New onboard entertainment

LAS
DFW
Excellent 8.0

Flight was punctual and service was good.

Gate change

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

SAT
PHL
Excellent 8.0

I took American's first direct flight between Philadelphia and San Antonio. It was a nice plane, good service, and amenities for a cost. Love that the plane had plugs!

PHL
YYZ
Good 6.0

On time

Small seats

Fri, Jul 27
ISP
LHR
9h 40m
Sun, Aug 5
LHR
ISP
12h 30m
Trip: 10 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
DFW
FLL
Excellent 8.0

No issues at all

N/A

SAT
PHL
Excellent 8.0

I took American's first direct flight between Philadelphia and San Antonio. It was a nice plane, good service, and amenities for a cost. Love that the plane had plugs!

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

DCA
CLT
Excellent 8.6

My wife is hypoglycemic and requires food. The flight was so early that none of the terminal restaraunts were open, nor did the plain have food for any passengers accept first class. I've purchased a box on other flights, but this one did not provide an option for a box lunch or breakfast.

PHL
YYZ
Good 6.0

On time

Small seats

Sun, Jul 1
ISP
LHR
19h 40m
Mon, Jul 9
LHR
ISP
14h 15m
$1641
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Mar 17
ISP
LHR
12h 57m
Sat, Mar 24
LHR
ISP
12h 44m
Trip: 8 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 28211 reviews
Overall
7.4
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.7
PHX
GEG
Good 7.3

The crew was friendly and informative. They were very helpful. The

The seats were uncomfortable. They were hard and so narrow I had to sit crooked in the seat to keep from getting banged into by the service carts and every person going by to the bathrooms. I'm not tiny, but I'm not huge either, it was just overcrowded. It was also very hot in the airplane the entire way from Phoenix to Spokane. My husband, who is always cold, was even hot.

SJU
MIA
Excellent 9.3

New onboard entertainment

CLT
LGA
Excellent 10.0

Ability to upgrade to first class

Security taking forever

JAX
DFW
Excellent 8.6

Polite. Clean. Nice business class.

Would like more Western food.

CLT
ILM
Mediocre 3.0

Three hours delay. I paid for a upgrade to first class. But because of the flight change i didn't get to keep my upgrade and I had to beg for a refund. I have had two trips in the past 5 days and all flights have been anywhere from 1 to 3 hours late. Worst experience with AA I have had in a long time.

Wed, Feb 28
ISP
LHR
13h 29m
Tue, Mar 6
LHR
ISP
14h 24m
$2010
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Sat, May 26
ISP
LHR
20h 20m
Tue, May 29
LHR
ISP
16h 55m
$2865
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews

Islip Long Island to London Heathrow Flight Information

Flights Arrive in London Heathrow
Flights Depart from Islip Long Island
Flight Price $689
Distance 3408 miles
Airlines American Airlines
*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.