Find Cheap Flights to London

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

(Round-trip)
Depart: Tue Mar 28 2017 Return: Tue Apr 25 2017 Trip spans 29 days
WOW air
WOW air
SFO
LGW
13h 45m
1 stop
LGW
SFO
16h 30m
1 stop
Depart: Tue Mar 28 2017 Return: Sun Apr 2 2017 Trip spans 6 days
Major Airline
Major Airline
BOS
LHR
13h 50m
1 stop
LHR
BOS
13h 19m
1 stop
Depart: Fri Apr 14 2017 Return: Sun Apr 16 2017 Trip spans 3 days
KLM
KLM
AUS
LHR
18h 40m
1 stop
LHR
AUS
17h 03m
2 stops
Depart: Fri Feb 24 2017 Return: Sat Mar 4 2017 Trip spans 9 days
Norwegian
Norwegian
JFK
LGW
6h 30m
nonstop
LGW
JFK
8h 20m
nonstop
Depart: Tue Feb 28 2017 Return: Sat Mar 4 2017 Trip spans 5 days
Icelandair
Icelandair
BOS
LHR
9h 40m
1 stop
LHR
BOS
26h 05m
1 stop
Depart: Thu Mar 2 2017 Return: Sun Mar 5 2017 Trip spans 4 days
Delta
Delta
AUS
LHR
34h 29m
1 stop
LHR
AUS
20h 42m
2 stops
Depart: Sun Apr 30 2017 Return: Mon May 8 2017 Trip spans 9 days
Austrian Airlines
Austrian Airlines
SFO
LHR
10h 35m
nonstop
LHR
SFO
11h 05m
nonstop
Depart: Mon Mar 13 2017 Return: Wed Mar 15 2017 Trip spans 3 days
Air India
Air India
EWR
LHR
6h 50m
nonstop
LHR
EWR
8h 20m
nonstop
Depart: Tue May 2 2017 Return: Fri May 12 2017 Trip spans 11 days
Air Canada
Air Canada
SFO
LHR
13h 55m
1 stop
LHR
SFO
15h 16m
1 stop
Depart: Wed Apr 5 2017 Return: Wed Apr 12 2017 Trip spans 8 days
Iberia
Iberia
BOS
LHR
6h 35m
nonstop
LHR
BOS
7h 20m
nonstop
Depart: Wed May 3 2017 Return: Wed May 24 2017 Trip spans 22 days
Finnair
Finnair
BOS
LHR
6h 35m
nonstop
LHR
BOS
7h 20m
nonstop
Depart: Wed Aug 9 2017 Return: Wed Aug 23 2017 Trip spans 15 days
Virgin Atlantic
Virgin Atlantic
BOS
LHR
6h 44m
nonstop
LHR
BOS
7h 35m
nonstop
Depart: Wed Mar 29 2017 Return: Wed Apr 26 2017 Trip spans 29 days
British Airways
British Airways
JFK
LGW
7h 00m
nonstop
LGW
JFK
7h 55m
nonstop
Depart: Sun Aug 6 2017 Return: Wed Aug 23 2017 Trip spans 18 days
United
United
BOS
LHR
10h 50m
1 stop
LHR
BOS
12h 50m
1 stop
Depart: Fri Mar 24 2017 Return: Sun Mar 26 2017 Trip spans 3 days
Aer Lingus
Aer Lingus
JFK
LHR
10h 40m
1 stop
LHR
JFK
10h 15m
1 stop
Depart: Mon May 1 2017 Return: Tue May 9 2017 Trip spans 9 days
Brussels Airlines
Brussels Airlines
SFO
LHR
10h 15m
nonstop
LHR
SFO
11h 00m
nonstop
Depart: Mon Jun 5 2017 Return: Tue Jun 13 2017 Trip spans 9 days
SWISS
SWISS
EWR
LHR
13h 25m
1 stop
LHR
EWR
11h 25m
1 stop
Depart: Wed Mar 1 2017 Return: Mon Mar 13 2017 Trip spans 12 days
American Airlines
American Airlines
ATL
LHR
10h 56m
1 stop
LHR
ATL
12h 29m
1 stop
Depart: Thu May 4 2017 Return: Sat May 13 2017 Trip spans 10 days
Air France
Air France
AUS
LHR
12h 45m
1 stop
LHR
AUS
15h 11m
1 stop
Depart: Fri Jul 21 2017 Return: Sun Jul 23 2017 Trip spans 3 days
Air Europa
Air Europa
JFK
LGW
13h 15m
1 stop
LGW
JFK
12h 35m
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.

^ 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

San Francisco
$360
New York
$414
Atlanta
$497
Newark
$443
Austin
$413
Boston
$411
Destination

London
only $411
only $360
Airlines Airline reviews

97 travelers who booked a flight from San Francisco to London rated their chosen airlines with an average of 7.7.

Overall
7.8
Boarding
7.9
Crew
8.2
Comfort
7.2
Food
7.0
Entertainment
8.0