Fly from
Fly to
Route
Depart
Return
OntarioLondon
ONT - LHR
ONTLHR
Ontario
Tue 29/9
15:14-15:05
1 stop15h 51m
London Heathrow
Tue 6/10
17:00-23:42
1 stop14h 42m
OntarioLondon
ONT - LHR
ONTLHR
Ontario
Wed 11/11
06:00-12:20
1 stop22h 20m
London Heathrow
Fri 13/11
14:45-22:54
1 stop16h 09m
OntarioLondon
ONT - LHR
ONTLHR
Ontario
Sat 5/9
13:56-06:45
2 stops32h 49m
London Heathrow
Thu 10/9
07:30-21:59
2 stops22h 29m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Sun 6/9
16:35-11:00
Nonstop10h 25m
London Heathrow
Mon 14/9
10:45-13:50
Nonstop11h 05m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Thu 22/10
12:55-07:25
Nonstop10h 30m
London Heathrow
Thu 29/10
13:45-17:55
Nonstop11h 10m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Thu 17/9
23:15-17:30
Nonstop10h 15m
London Heathrow
Mon 21/9
06:30-11:45
1 stop13h 15m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Mon 16/11
12:50-07:25
Nonstop10h 35m
London Heathrow
Tue 1/12
13:45-16:55
Nonstop11h 10m
San FranciscoLondon
SFO - LCY
SFOLCY
San Francisco
Thu 13/8
05:36-08:50
2 stops19h 14m
London City
Thu 20/8
20:15-11:45
1 stop23h 30m
San FranciscoLondon
SFO - LHR
SFOLHR
San Francisco
Fri 11/9
23:15-17:30
Nonstop10h 15m
London Heathrow
Sun 20/9
06:15-12:50
1 stop14h 35m
Los AngelesLondon
LAX - LGW
LAXLGW
Los Angeles
Mon 28/9
11:34-16:00
2 stops20h 26m
London Gatwick
Sat 3/10
10:25-18:44
1 stop16h 19m
Currently, February is the cheapest month in which you can book a flight from California to London (average of £482). Flying from California to London in June is currently the most expensive (average of £910). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
It’s typically best to fly out from California to London in the afternoon. Doing so could potentially save you 13% on the flight price compared to flying at midday, which is usually more expensive.
The most flights from USCA to LON are scheduled on a Monday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (50 on average).
Booking 29 days in advance of your planned departure date is, on average, the best time to get cheap flights from California to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Travellers seeking maximum savings on their California to London flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
Deals for California to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Cheapflights helps you find that perfect flight to London from California by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Yes, we can. To see specific flights from California to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Yes, Cheapflights offers price alerts on California to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.