Cheap flights from San Francisco (SFO) to London (LON)

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The best prices from San Francisco to London are usually found in February or January, booked 60 days in advance, depart on a Tuesday or Monday and return on a Thursday

How to find the cheapest flight from
San Francisco (SFO) to London (LON)

All the information you need to plan the best SFO to LON flight in 2021: compare San Francisco to London flight prices with the expected peak season, weather and rainfall in London.
SFO - LON
Price
$411 - $702
LON
Temperature
48.2 - 73.4 °F
LON
Rainfall
1.4 - 2.8 inches

Popular in

December

High demand for flights, 27% potential price rise

Cheapest in

February

Best time to find cheap flights, 19% potential price drop

Round-trip from

$411

From San Francisco to London

One-way from

$279

One-way flight from San Francisco to London

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from San Francisco to London?

Flights from San Francisco to London are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from San Francisco to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 44% on flights from San Francisco to London compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $910. For sooner than that we have options available in the next 3 days from $1,146.

What is the cheapest month to fly from San Francisco to London?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, October can be a great choice for travel to London. Flights to London from San Francisco in October are about $714 on average during October, but can be found for as low as $445.

When is the cheapest time to fly from San Francisco to London (SFO - LON)?

It’s typically best to fly out from San Francisco to London in the evening. Doing so could potentially save you 8% on the flight price compared to flying in the morning, which is usually more expensive.

Cheap flights from San Francisco to London in May, June 2021

The best prices found for SFO to LON flights for May, June
29 Jun - 12 Jul
$432pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
5 Jun - 14 Jun
$434pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
29 Jun - 7 Jul
$446pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco

San Francisco to London 2021 flight deals

Cheap flights to London from San Francisco found for this year
20 Sep - 29 Sep
$371pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
LTN
London Luton
LTN
London Luton
Multiple Airlines
   
2 STOPS
SFO
San Francisco
20 Sep - 29 Sep
$371pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
10 Nov - 13 Nov
$374pp
SFO
San Francisco
SAS
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
SAS
 
1 STOP
SFO
San Francisco

Non-stop flights to London from San Francisco

Save time with San Francisco to London direct flight deals
18 Jun - 6 Jul
$679pp
SFO
San Francisco
KLM
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
KLM
Non-Stop
SFO
San Francisco
12 Oct - 13 Jan
$719pp
SFO
San Francisco
Finnair
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Finnair
Non-Stop
SFO
San Francisco
19 May - 9 Jun
$726pp
SFO
San Francisco
Multiple Airlines
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
Non-Stop
SFO
San Francisco

Last minute flights from San Francisco to London

Late deals on round-trip flights to London from San Francisco, departing today and this week
17 May - 21 May
$548pp
SFO
San Francisco
Multiple Airlines
     
3 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
15 May - 12 Jun
$549pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
17 May - 16 Jun
$597pp
SFO
San Francisco
Multiple Airlines
     
3 STOPS
LTN
London Luton
LTN
London Luton
Multiple Airlines
   
2 STOPS
SFO
San Francisco

One-way flights to London from San Francisco

The cheapest one-way flights from San Francisco to London
4:20 pm - 3:50 am
Multiple Airlines
1 Stop
27h 30m
SFO - STN
Multiple Airlines
$279
Kiwi.com
4:20 pm - 3:50 am
Multiple Airlines
1 Stop
27h 30m
SFO - STN
Multiple Airlines
$286
Kiwi.com
4:20 pm - 9:25 am
Multiple Airlines
1 Stop
33h 05m
SFO - STN
Multiple Airlines
$290
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">San Francisco</span> to <span class="emphasized">London</span> flights.

Flight FAQs

From San Francisco to London

Are flight prices decreasing from San Francisco to London due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both San Francisco and London for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from San Francisco to London to control the spread of COVID-19?

New policies can now be found on Delta to help keep travelers safe while flying. New policies for travelers booking flights from San Francisco to London include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from San Francisco to London have flexible cancellations due to COVID-19?

Some of the carriers operating flights from San Francisco to London that may be offering flexible cancellation policies are United Airlines, Virgin Atlantic, and British Airways. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

What airport do you fly from for flights from San Francisco to London?

Most people fly from San Francisco (SFO) if they book a flight from San Francisco to London. On average, San Francisco has 2 outbound flights to London per day from 23 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

Can I find flights from San Francisco to London for under $400 on Cheapflights?

Yes, there are multiple flights from San Francisco to London for under $400. The cheapest flight booked recently is on Multiple Airlines for just $371, but on average you can expect to pay $385.

Are there nonstop flights from San Francisco to London for under $700 on Cheapflights?

Cheapflights has at least 20 direct flights from San Francisco to London under $700. A good price for a nonstop flight from San Francisco to London is less than $738.

Are there last-minute flights available from San Francisco to London for under $600?

There are currently 20+ open flights from San Francisco to London within the next 7 days for less than $600.

What days are nonstop flights available from San Francisco to London?

Days when nonstop flights are available for this flight are: Thursday.

How many flights depart from San Francisco to London on average per day?

1 flight departure from San Francisco to London per day on average.
Evening (6pm - Midnight) - 100% of flight departures

Is San Francisco weather warmer or cooler than London?

You can imagine temperatures to be in the 77 °F range in September. The weather in London is generally colder than San Francisco's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long is the flight from San Francisco to London?

A quick flight from San Francisco to London can take about 13h 50m. SWISS provides one of the quickest options available for as low as $864. Airlines will cover a distance of 5383 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What is the cheapest airline to fly from San Francisco to London round-trip?

Our cheapest airline available from San Francisco to London is SAS. Our recent data shows that you can find tickets from as low as $398 on this airline. Users have found that SAS is 22% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from San Francisco to London one-way?

The cheapest airline for a one-way flight from San Francisco to London is TAP AIR PORTUGAL ($292).

Alternative routes for San Francisco to London

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for London

Things to know before you go - useful duration and weather info for your trip from San Francisco to London.
Today's exchange rate
$1 = £0.72
Average temperature for May in London
64.4 °F
Avg rainfall for May in London
2.0 ″

Airports servicing San Francisco

Airports servicing London

Gatwick (LGW)
City (LCY)
Stansted (STN)
Luton (LTN)
Southend (SEN)

Top 10 airlines flying from San Francisco to London

The chart below displays the airlines Cheapflights users traveling from San Francisco to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
TAP AIR PORTUGAL
$223 $447 No cancel fee N/A
SWISS
$411 $575 No cancel fee 79%
Brussels Airlines
$327 $596 No cancel fee N/A
Finnair
$347 $601 No cancel fee 76%
Air Canada
$374 $680 No cancel fee 67%
Norwegian
$364 $759 No cancel fee 74%
Austrian Airlines
$379 $792 No cancel fee 78%
WestJet
$467 $819 No cancel fee 60%
Aer Lingus
$586 $936 No cancel fee N/A
Icelandair
$353 $936 No cancel fee 76%

Hourly flight availability from San Francisco to London

See what time of day planes typically take off from San Francisco towards London.
Evening 6 PM to midnight 100% of SFO to LON departures
Early morning Midnight to 6 AM 0% of SFO to LON departures
Morning 6 AM to noon 0% of SFO to LON departures
Afternoon Noon to 6 PM 0% of SFO to LON departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from San Francisco to London
See how many times per day planes take to the skies headed from San Francisco to London.
Sunday
5 daily flights
Monday
0 flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
5 daily flights
Saturday
0 flights
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