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

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Islip Long Island to London Heathrow

(Round-trip)
Depart: Sun Dec 24 2017 Return: Sun Dec 31 2017 Trip spans 8 days
American Airlines
American Airlines
ISP
LHR
10h 00m
1 stop
LHR
ISP
12h 20m
1 stop
Depart: Mon Aug 21 2017 Return: Tue Aug 29 2017 Trip spans 9 days
American Airlines
American Airlines
ISP
LHR
12h 25m
1 stop
LHR
ISP
11h 59m
1 stop
Depart: Mon Aug 21 2017 Return: Mon Aug 28 2017 Trip spans 8 days
American Airlines
American Airlines
ISP
LHR
12h 25m
1 stop
LHR
ISP
11h 59m
1 stop
Depart: Mon Jul 31 2017 Return: Sun Aug 13 2017 Trip spans 14 days
$2138
Select
Multiple Airlines
Multiple Airlines
ISP
LHR
12h 33m
1 stop
LHR
ISP
16h 29m
1 stop
Depart: Fri Aug 11 2017 Return: Fri Aug 25 2017 Trip spans 15 days
American Airlines
American Airlines
ISP
LHR
10h 05m
1 stop
LHR
ISP
14h 28m
1 stop
Depart: Fri Sep 1 2017 Return: Sat Sep 9 2017 Trip spans 9 days
$1096
Select
American Airlines
American Airlines
ISP
LHR
9h 51m
1 stop
LHR
ISP
12h 43m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Islip
$746
Destination

London
$746