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
Precipitation
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

$117

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?

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 16% on the overall cost on flights from San Francisco to London.

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

Find a great deal and save up to 79% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to London within the next two weeks, with the cheapest ticket starting at $701.

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

February is one of the best times of the year to fly to London from San Francisco. Prices for February average $510 per person but you can even find prices for as low as $369. The most expensive prices can be found in the month of December. Opting for a February flight can save you 37% on your journey compared to booking in February

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

One of the essential ways to save on airfare from San Francisco to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 8% on airfare.

Cheap flights from San Francisco to London in September, October 2021

The best prices found for SFO to LON flights for September, October
15 Oct - 31 Oct
$342pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
1 Oct - 6 Oct
$344pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
1 Oct - 14 Oct
$348pp
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
15 Oct - 31 Oct
$342pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
1 Oct - 6 Oct
$344pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
1 Oct - 14 Oct
$348pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco

Non-stop flights to London from San Francisco

Save time with San Francisco to London direct flight deals
12 Jan - 23 Jan
$413pp
SFO
San Francisco
Finnair
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Finnair
Non-Stop
SFO
San Francisco
6 Jan - 13 Jan
$415pp
SFO
San Francisco
British Airways
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
British Airways
Non-Stop
SFO
San Francisco
27 Dec - 19 Jan
$418pp
SFO
San Francisco
British Airways
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
British Airways
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
24 Sep - 6 Oct
$526pp
SFO
San Francisco
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
SFO
San Francisco
21 Sep - 24 Sep
$541pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
23 Sep - 6 Oct
$547pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
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
10:55 am - 5:25 am
Multiple Airlines
2 Stops
34h 30m
SFO - LTN
Multiple Airlines
$117
Kiwi.com
5:10 pm - 3:20 pm
Multiple Airlines
2 Stops
38h 10m
SFO - STN
Multiple Airlines
$163
Combigo
9:46 am - 9:20 am
Multiple Airlines
2 Stops
41h 34m
SFO - STN
Multiple Airlines
$232
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

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 18 outbound flights to London per day from 23 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

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.

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.

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 $342, but on average you can expect to pay $393.

Are there nonstop flights from San Francisco to London for under $500 on Cheapflights?

Cheapflights has at least 20 direct flights from San Francisco to London under $500. A good price for a nonstop flight from San Francisco to London is less than $437.

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 are the cheapest airlines flying from San Francisco to London round-trip?

Cheapflights users have booked flights from San Francisco to London round-trip from $413. Other airlines that can offer you cheap pricing are British Airways, from $415, and American Airlines, from $417. Finnair is 19% cheaper than the average price of flights available within the next 90 days to this destination.

COVID Restrictions

View COVID Travel Restrictions for London, England

Do I need a COVID test to fly to London from San Francisco?

Information is based on travel restrictions from San Francisco to London

Most visitors from San Francisco need to provide a negative COVID-19 test result and/or quarantine to enter London.

COVID-19 testing requirements
Visitors from San Francisco must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to London.

Quarantine requirements
Visitors from San Francisco are not required to quarantine after entering London.

Documents
Mandatory passenger locator form - Submit the form any time in the 48 hours before arriving in the UK. Show the form when checking in your plane, train or ferry to the UK.

Managed quarantine package for Scotland - All travelers arriving directly to Scotland are required to book their Managed Quarantine Package prior to travel.

COVID-19 testing package - All travelers must book and pay for a COVID-19 Testing Package prior to travel to England and Scotland.


Do I need a test to fly back to San Francisco from London?

Returning to San Francisco from London

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to San Francisco.

Quarantine requirements
Visitors from London are not required to quarantine after entering San Francisco.

Hide COVID Travel Restrictions for London, England

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 = £0.73
Flight duration from SFO to London
10h 47m
Average temperature for September in London
68.0 °F
Avg rainfall for September in London
1.9 ″

Airports servicing San Francisco

Airports servicing London

Gatwick (LGW)
Stansted (STN)
London City (LCY)
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.
Afternoon Noon to 6 PM 80% of SFO to LON departures
Evening 6 PM to midnight 19% of SFO to LON departures
Early morning Midnight to 6 AM 1% of SFO to LON departures
Morning 6 AM to noon 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
18 daily flights
Monday
18 daily flights
Tuesday
18 daily flights
Wednesday
18 daily flights
Thursday
18 daily flights
Friday
18 daily flights
Saturday
18 daily flights
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