Cheap flights from Heathrow to San Francisco

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How to find the cheapest flight from
Heathrow (LHR) to San Francisco (SFO)

All the information you need to plan the best LHR to SFO flight in 2021: compare Heathrow to San Francisco flight prices with the expected peak season, weather and rainfall in San Francisco.
LHR - SFO
Price
£283 - £534
SFO
Temperature
15 - 25 °C
SFO
Rainfall
0 - 120 mm

Popular in

July

High demand for flights, 34% potential price rise

Cheapest in

November

Best time to find cheap flights, 20% potential price drop

Average price

£324

Average for round-trip flights in April 2021

Round-trip from

£283

From Heathrow to San Francisco

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Heathrow to San Francisco?

To save up to 41% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Heathrow to San Francisco from £387 1-2 weeks out and tickets from £475 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to San Francisco. Flights to San Francisco from Heathrow in February are about £353 on average during February, but can be found for as low as £258.

Cheap flights from Heathrow to San Francisco in April, May 2021

The best prices found for LHR to SFO flights in April, May
29 May - 10 Jun
£268pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Air Canada
 
1 STOP
LHR
London Heathrow
21 May - 4 Jun
£269pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Air Canada
 
1 STOP
LHR
London Heathrow
23 May - 26 Jun
£273pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Air Canada
 
1 STOP
LHR
London Heathrow

Heathrow to San Francisco 2021 flight deals

Cheap flights to San Francisco from Heathrow found for this year
18 Jun - 8 Jul
£261pp
LHR
London Heathrow
TAP AIR PORTUGAL
 
1 STOP
SFO
San Francisco
SFO
San Francisco
TAP AIR PORTUGAL
 
1 STOP
LHR
London Heathrow
17 Aug - 28 Aug
£265pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Air Canada
 
1 STOP
LHR
London Heathrow
14 Aug - 29 Aug
£265pp
LHR
London Heathrow
Multiple airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Air Canada
 
1 STOP
LHR
London Heathrow

Direct flights to San Francisco from Heathrow

Save time with Heathrow to San Francisco direct flight deals
14 Aug - 29 Aug
£299pp
LHR
London Heathrow
Austrian Airlines
Direct
SFO
San Francisco
SFO
San Francisco
Austrian Airlines
Direct
LHR
London Heathrow
17 Aug - 28 Aug
£300pp
LHR
London Heathrow
Austrian Airlines
Direct
SFO
San Francisco
SFO
San Francisco
Austrian Airlines
Direct
LHR
London Heathrow
7 Jul - 11 Aug
£302pp
LHR
London Heathrow
Austrian Airlines
Direct
SFO
San Francisco
SFO
San Francisco
Austrian Airlines
Direct
LHR
London Heathrow

Last-minute flights from Heathrow to San Francisco

Late deals on return flights to San Francisco from Heathrow, departing today and this week
25 Apr - 23 May
£386pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Virgin Atlantic
 
1 STOP
LHR
London Heathrow
25 Apr - 23 May
£416pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Virgin Atlantic
Direct
LHR
London Heathrow
24 Apr - 16 May
£426pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Virgin Atlantic
 
1 STOP
LHR
London Heathrow

One-way flights to San Francisco from Heathrow

The cheapest one-way flights from Heathrow to San Francisco
05:55 - 07:45
Delta
1 stop
33h 50m
LHR - SFO
Delta
07:10 - 10:15
Finnair
Direct
11h 05m
LHR - SFO
Finnair
05:30 - 17:36
Lufthansa
2 stops
20h 06m
LHR - SFO
Lufthansa
£234
Lufthansa

Related info for your journey

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

Flight FAQs

From Heathrow to San Francisco

Are flight prices decreasing from Heathrow to San Francisco 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 Heathrow and San Francisco 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 London Heathrow to San Francisco to control the spread of COVID-19?

New policies can now be found on Delta to help keep travellers safe while flying. Airline carriers are regularly disinfecting and sanitising their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially-distanced seating (for a limited time) will work towards keeping travellers safer while flying from London Heathrow to San Francisco. Policies will vary by airline.

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

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

Can I find flights from Heathrow to San Francisco for under £290 on Cheapflights?

Yes, there are multiple flights from Heathrow to San Francisco for under £290. The cheapest flight booked recently is on TAP AIR PORTUGAL for just £261, but on average you can expect to pay £275.

Are there direct flights from Heathrow to San Francisco for under £362 on Cheapflights?

Cheapflights has 20 direct flights from Heathrow to San Francisco under £362. A good price for a direct flight from Heathrow to San Francisco is less than £312.

Are there last-minute flights available from Heathrow to San Francisco for under £435?

There are currently 20+ open flights from Heathrow to San Francisco within the next 7 days for less than £435.

Does it rain more in Heathrow or San Francisco?

When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Heathrow is roughly greater than that of San Francisco. You can assume this to be the case over the next 20 days.

Is Heathrow weather warmer or cooler than San Francisco?

Expect the weather to be around 25 °C on average in September. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in San Francisco is generally hotter than in Heathrow.

How long does is the flight from Heathrow to San Francisco?

For as low as £286, Lufthansa can have you in San Francisco from Heathrow in 14h 25m. This flight may include one or multiple stops.

What are the cheapest airlines to flying from Heathrow to San Francisco return?

Flying on TAP AIR PORTUGAL is currently your cheapest option to San Francisco, with prices starting at £261. Additional return tickets that might be worth considering are offered by SWISS and Lufthansa, with the lowest prices starting at £282 and £285, respectively. TAP AIR PORTUGAL is 26% cheaper than the average price of flights available within the next 90 days to this destination.

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

To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at £214. Lufthansa flights start at £216 while deals on SWISS start at £219 one-way.

Alternative routes for Heathrow to San Francisco

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

Destination information for San Francisco

Things to know before you go - useful duration and weather info for your trip from Heathrow to San Francisco.
Today's exchange rate
£1 = $1.38
Average temperature for April in San Francisco
19.0 °C
Avg rainfall for April in San Francisco
29.0 mm

Airports servicing London

Airports servicing San Francisco

Top 10 airlines flying from Heathrow to San Francisco

The chart below displays the airlines Cheapflights users travelling from Heathrow to San Francisco 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
Brussels Airlines
£351 £516 No cancel fee N/A
Search Brussels Airlines flights
Air France
£369 £550 No cancel fee 77%
Search Air France flights
SWISS
£377 £559 No cancel fee 79%
Search SWISS flights
American Airlines
£341 £561 No cancel fee 71%
Search American Airlines flights
KLM
£330 £561 No cancel fee 75%
Search KLM flights
Iberia
£365 £564 No cancel fee 77%
Search Iberia flights
Finnair
£348 £569 No cancel fee 76%
Search Finnair flights
TAP AIR PORTUGAL
£410 £590 No cancel fee N/A
Search TAP AIR PORTUGAL flights
Air Canada
£342 £614 No cancel fee 67%
Search Air Canada flights
Norwegian Air UK
£385 £669 No cancel fee N/A
Search Norwegian Air UK flights

Hourly flight availability from Heathrow to San Francisco

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