Find Cheap Flights to London Heathrow

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 to London Heathrow

(Round-trip)
Depart: Wed Jan 25 2017 Return: Wed Feb 1 2017 Trip spans 8 days
Virgin Atlantic
Virgin Atlantic
SEA
LHR
9h 58m
nonstop
LHR
SEA
10h 29m
nonstop
Depart: Fri Mar 3 2017 Return: Sun Mar 5 2017 Trip spans 3 days
Icelandair
Icelandair
IAD
LHR
18h 45m
1 stop
LHR
IAD
10h 50m
1 stop
Depart: Sat Feb 4 2017 Return: Sun Feb 5 2017 Trip spans 2 days
Major Airline
Major Airline
LGA
LHR
10h 45m
1 stop
LHR
LGA
11h 18m
1 stop
Depart: Sat Oct 15 2016 Return: Mon Oct 17 2016 Trip spans 3 days
TAP Portugal
TAP Portugal
BOS
LHR
21h 00m
1 stop
LHR
BOS
26h 10m
1 stop
Depart: Sat Feb 4 2017 Return: Mon Feb 6 2017 Trip spans 3 days
United
United
IAD
LHR
11h 00m
1 stop
LHR
IAD
13h 15m
1 stop
Depart: Sat Feb 18 2017 Return: Fri Feb 24 2017 Trip spans 7 days
Air Canada
Air Canada
LGA
LHR
12h 30m
1 stop
LHR
LGA
13h 30m
1 stop
Depart: Fri Feb 10 2017 Return: Sun Feb 12 2017 Trip spans 3 days
Austrian Airlines
Austrian Airlines
EWR
LHR
7h 20m
nonstop
LHR
EWR
8h 50m
nonstop
Depart: Sat Oct 22 2016 Return: Mon Oct 24 2016 Trip spans 3 days
Delta
Delta
PHL
LHR
16h 25m
1 stop
LHR
PHL
15h 28m
2 stops
Depart: Wed Jan 25 2017 Return: Sun Jan 29 2017 Trip spans 5 days
American Airlines
American Airlines
JFK
LHR
6h 50m
nonstop
LHR
JFK
8h 00m
nonstop
Depart: Sat Mar 4 2017 Return: Tue Mar 7 2017 Trip spans 4 days
Lufthansa
Lufthansa
EWR
LHR
7h 25m
nonstop
LHR
EWR
8h 30m
nonstop
Depart: Wed Mar 1 2017 Return: Thu Mar 9 2017 Trip spans 9 days
Virgin Atlantic
Virgin Atlantic
SEA
LHR
9h 58m
nonstop
LHR
SEA
10h 26m
nonstop
Depart: Sun Nov 20 2016 Return: Sat Dec 3 2016 Trip spans 14 days
Turkish Airlines
Turkish Airlines
ORD
LHR
18h 20m
1 stop
LHR
ORD
32h 10m
1 stop
Depart: Wed Mar 8 2017 Return: Wed Mar 22 2017 Trip spans 14 days
Virgin Atlantic
Virgin Atlantic
SEA
LHR
9h 58m
nonstop
LHR
SEA
10h 26m
nonstop
Depart: Fri Dec 16 2016 Return: Sun Dec 25 2016 Trip spans 10 days
Alitalia
Alitalia
DCA
LHR
18h 00m
2 stops
LHR
DCA
20h 08m
2 stops
Depart: Fri Dec 30 2016 Return: Sun Jan 8 2017 Trip spans 10 days
Aer Lingus
Aer Lingus
IAD
LHR
13h 20m
1 stop
LHR
IAD
12h 30m
1 stop
Depart: Fri Mar 10 2017 Return: Sun Mar 12 2017 Trip spans 3 days
British Airways
British Airways
PHL
LHR
11h 25m
1 stop
LHR
PHL
13h 45m
1 stop
Depart: Wed Oct 12 2016 Return: Mon Oct 31 2016 Trip spans 20 days
Air India
Air India
EWR
LHR
6h 45m
nonstop
LHR
EWR
8h 20m
nonstop
Depart: Fri Mar 3 2017 Return: Sun Mar 5 2017 Trip spans 3 days
KLM
KLM
HPN
LHR
12h 49m
1 stop
LHR
HPN
19h 29m
2 stops
Depart: Wed Feb 15 2017 Return: Mon Feb 20 2017 Trip spans 6 days
Virgin Atlantic
Virgin Atlantic
SEA
LHR
18h 45m
1 stop
LHR
SEA
10h 29m
nonstop
Depart: Fri Jan 20 2017 Return: Sun Jan 22 2017 Trip spans 3 days
Brussels Airlines
Brussels Airlines
SNA
LHR
16h 40m
1 stop
LHR
SNA
39h 25m
2 stops
* 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,
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^ The fares displayed in KAYAK ads found on other sites include all taxes and fees for economy class travel and were found by KAYAK users 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.
Airports
Origin

New York
only $402
only $492
Seattle
$278
Chicago
$596
Santa Ana
$714
White Plains
$672
Newark
$477
Philadelphia
$481
Washington
only $375
only $619
Boston
$403
Destination

London
$278
Airlines Airline reviews

83 travelers who booked a flight from Seattle to London rated their chosen airlines with an average of 7.8.

Overall
7.9
Boarding
8.2
Crew
8.5
Comfort
7.8
Food
7.1
Entertainment
7.7