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

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The best prices from San Francisco International 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 International (SFO) to London (LON)

All the information you need to plan the best SFO to LON flight in 2021: compare San Francisco International 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 International to London

One-way from

$283

One-way flight from San Francisco International 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 International to London?

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Users have found that booking a flight from San Francisco International to London at least 61 days early can save you up to 44% on average compared to booking a flight this week. If booking 61 days before your flight isn’t an option for you, users have found flights from San Francisco International to London for as little as $910 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $1,146 for flights departing within the next 3 days.

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

October is one of the best times of the year to fly to London from San Francisco International. Prices for October average $714 per person but you can even find prices for as low as $445. The most expensive prices can be found in the month of July. Opting for a October flight can save you 31% on your journey compared to booking in October

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

One of the essential ways to save on airfare from San Francisco International 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 International to London in May, June 2021

The best prices found for SFO to LON flights for May, June
23 Jun - 5 Jul
$441pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
26 Jun - 5 Jul
$453pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
29 Jun - 14 Jul
$454pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco

San Francisco International to London 2021 flight deals

Cheap flights to London from San Francisco International found for this year
6 Sep - 29 Sep
$371pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
LTN
London Luton
LTN
London Luton
Multiple Airlines
   
2 STOPS
SFO
San Francisco
6 Sep - 29 Sep
$371pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
13 Sep - 22 Sep
$372pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
LTN
London Luton
LTN
London Luton
Multiple Airlines
   
2 STOPS
SFO
San Francisco

Non-stop flights to London from San Francisco International

Save time with San Francisco International to London direct flight deals
27 May - 2 Jun
$717pp
SFO
San Francisco
Multiple Airlines
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
KLM
Non-Stop
SFO
San Francisco
19 Oct - 18 Jan
$718pp
SFO
San Francisco
Finnair
Non-Stop
LHR
London Heathrow
LHR
London Heathrow
Finnair
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

Last minute flights from San Francisco International to London

Late deals on round-trip flights to London from San Francisco International, departing today and this week
12 May - 9 Jun
$557pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
12 May - 2 Jun
$567pp
SFO
San Francisco
Multiple Airlines
     
3 STOPS
STN
London Stansted
STN
London Stansted
Multiple Airlines
   
2 STOPS
SFO
San Francisco
12 May - 9 Jun
$609pp
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 International

The cheapest one-way flights from San Francisco International to London
4:20 pm - 3:50 am
Multiple Airlines
1 Stop
27h 30m
SFO - STN
Multiple Airlines
$283
Kiwi.com
4:20 pm - 4:20 am
Multiple Airlines
1 Stop
28h 00m
SFO - LGW
Multiple Airlines
$286
Kiwi.com
4:20 pm - 4:55 am
Multiple Airlines
1 Stop
28h 35m
SFO - LGW
Multiple Airlines
$289
Kiwi.com

Related info for your journey

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

Flight FAQs

From San Francisco International 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 International to London for under $400 on Cheapflights?

Yes, there are multiple flights from San Francisco International 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 $384.

Are there nonstop flights from San Francisco International to London for under $800 on Cheapflights?

Cheapflights has at least 20 direct flights from San Francisco International to London under $800. A good price for a nonstop flight from San Francisco International to London is less than $733.

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

There are currently 20+ open flights from San Francisco International 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 International 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 International to London?

For as low as $646, Aer Lingus can have you in London from San Francisco International in 16h. Airlines will cover a distance of 5383 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

Currently priced at $398, SAS will fly you from San Francisco International to London and back. In addition to SAS, many other airlines offer competitively priced options for your trip. SAS is 22% cheaper than the average price of flights available within the next 90 days to this destination.

Alternative routes for San Francisco International 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 International 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 International to London

The chart below displays the airlines Cheapflights users traveling from San Francisco International 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 International to London

See what time of day planes typically take off from San Francisco International 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 International to London
See how many times per day planes take to the skies headed from San Francisco International to London.
Sunday
5 daily flights
Monday
0 flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
4 daily flights
Saturday
0 flights
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