Find Cheap Flights from London Heathrow to United States

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.
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Book cheap flights from London Heathrow to United States

(Round-trip)
Depart: Wed Mar 7 2018 Return: Wed Mar 14 2018 Trip spans 7 days
Multiple Airlines
Multiple Airlines
LHR
BOS
12h 00m
1 stop
BOS
LHR
6h 20m
nonstop
Depart: Fri Feb 2 2018 Return: Sun Feb 11 2018 Trip spans 10 days
TAP AIR PORTUGAL
TAP AIR PORTUGAL
LHR
BOS
12h 30m
1 stop
BOS
LHR
22h 55m
1 stop
Depart: Wed Mar 14 2018 Return: Wed Mar 28 2018 Trip spans 15 days
British Airways
British Airways
LHR
BOS
7h 40m
nonstop
BOS
LHR
6h 35m
nonstop
Depart: Sun Feb 4 2018 Return: Wed Feb 14 2018 Trip spans 11 days
Finnair
Finnair
LHR
BOS
31h 57m
2 stops
BOS
LHR
6h 20m
nonstop
Depart: Fri Nov 17 2017 Return: Mon Nov 27 2017 Trip spans 11 days
Virgin Atlantic
Virgin Atlantic
LHR
BOS
7h 30m
nonstop
BOS
LHR
6h 20m
nonstop
Depart: Wed Nov 22 2017 Return: Tue Nov 28 2017 Trip spans 7 days
Austrian Airlines
Austrian Airlines
LHR
EWR
8h 25m
nonstop
EWR
LHR
7h 00m
nonstop
Depart: Tue Jan 23 2018 Return: Tue Jan 30 2018 Trip spans 8 days
Multiple Airlines
Multiple Airlines
LHR
BOS
7h 40m
nonstop
BOS
LHR
6h 20m
nonstop
Depart: Thu Feb 1 2018 Return: Mon Feb 5 2018 Trip spans 5 days
TAP AIR PORTUGAL
TAP AIR PORTUGAL
LHR
BOS
12h 30m
1 stop
BOS
LHR
13h 00m
1 stop
Depart: Wed Mar 21 2018 Return: Wed Mar 28 2018 Trip spans 8 days
British Airways
British Airways
LHR
BOS
7h 50m
nonstop
BOS
LHR
6h 30m
nonstop
Depart: Mon Mar 5 2018 Return: Fri Mar 16 2018 Trip spans 11 days
TAP AIR PORTUGAL
TAP AIR PORTUGAL
LHR
BOS
12h 30m
1 stop
BOS
LHR
11h 45m
1 stop
Depart: Wed Jan 31 2018 Return: Wed Feb 7 2018 Trip spans 8 days
Multiple Airlines
Multiple Airlines
LHR
BOS
7h 40m
nonstop
BOS
LHR
6h 20m
nonstop
Depart: Tue Nov 14 2017 Return: Tue Nov 21 2017 Trip spans 8 days
Finnair
Finnair
LHR
BOS
7h 30m
nonstop
BOS
LHR
6h 20m
nonstop
Depart: Tue Dec 19 2017 Return: Wed Jan 10 2018 Trip spans 23 days
Austrian Airlines
Austrian Airlines
LHR
EWR
8h 30m
nonstop
EWR
LHR
7h 00m
nonstop
Depart: Fri Feb 16 2018 Return: Fri Mar 2 2018 Trip spans 15 days
British Airways
British Airways
LHR
BOS
7h 45m
nonstop
BOS
LHR
6h 30m
nonstop
Depart: Thu Jan 18 2018 Return: Wed Jan 24 2018 Trip spans 7 days
TAP AIR PORTUGAL
TAP AIR PORTUGAL
LHR
BOS
12h 30m
1 stop
BOS
LHR
11h 45m
1 stop
Depart: Wed Jan 31 2018 Return: Thu Feb 8 2018 Trip spans 9 days
Austrian Airlines
Austrian Airlines
LHR
EWR
8h 25m
nonstop
EWR
LHR
7h 00m
nonstop
Depart: Fri Mar 9 2018 Return: Mon Mar 12 2018 Trip spans 3 days
Multiple Airlines
Multiple Airlines
LHR
BOS
7h 45m
nonstop
BOS
LHR
6h 20m
nonstop
Depart: Thu Jan 25 2018 Return: Mon Jan 29 2018 Trip spans 5 days
TAP AIR PORTUGAL
TAP AIR PORTUGAL
LHR
BOS
12h 30m
1 stop
BOS
LHR
13h 00m
1 stop
Depart: Mon Jan 8 2018 Return: Mon Jan 15 2018 Trip spans 8 days
British Airways
British Airways
LHR
BOS
7h 30m
nonstop
BOS
LHR
6h 20m
nonstop
Depart: Fri Feb 2 2018 Return: Thu Feb 8 2018 Trip spans 7 days
Austrian Airlines
Austrian Airlines
LHR
EWR
8h 30m
nonstop
EWR
LHR
7h 05m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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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

London
$375
Destination

Newark
$434
Boston
$375