How long is the flight from London to San Francisco?

For as low as $765, SWISS can have you in San Francisco from London in 11h 10m. The distance between London and San Francisco is about 8610 km. This flight may include one or multiple stops.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

What are the most popular routes from London to San Francisco?

Most travellers choose London Stansted - San Francisco, London Luton - San Francisco or London Southend - San Francisco when deciding on the best route from London to San Francisco.

What are the most reliable airlines from London to San Francisco?

Before booking your flight to San Francisco from London, have a look at the most reliable airlines to get you to your destination on time: Air Canada (73%), Austrian Airlines (73%), United Airlines( 73%).

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

Located just 17.7 km from the city centre, San Francisco is the airport most travellers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 28 daily inbound flights from London from 0 different airlines.

Can I find deals for flights from London to San Francisco that include hotel bookings?

Yes. In addition to deals on London to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from London to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.

Can I find deals for business class flights from London to San Francisco?

Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$735+ Cheap Flights from London to San Francisco

Cheapflights Tip: The best prices from London to San Francisco are usually found in February or November, booked 74 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from London to San Francisco

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 October 2026.

Tue 6/1013:00 -

Nonstop10h 55m

Wed 9/1216:25 -

1 stop13h 05m

Deal found 28/9$741

Thu 8/1007:00 -

2 stops17h 15m

Wed 21/1019:35 -

1 stop28h 20m

Deal found 29/9$752

Tue 27/1018:40 -

1 stop29h 50m

Wed 20/119:25 -

2 stops18h 00m

Deal found 29/9$754

Mon 9/1106:00 -

1 stop18h 30m

Mon 16/1114:20 -

2 stops20h 55m

Deal found 28/9$760

Tue 6/1010:35 -

Nonstop11h 00m

Mon 12/1014:25 -

1 stop18h 00m

Deal found 29/9$763

Tue 13/1019:15 -

2 stops29h 00m

Mon 19/1014:25 -

1 stop14h 35m

Deal found 29/9$764

Sat 10/1013:00 -

Nonstop11h 00m

Mon 19/1019:45 -

Nonstop10h 25m

Deal found 28/9$765

Mon 5/1013:00 -

Nonstop10h 55m

Wed 9/1212:45 -

1 stop14h 05m

Deal found 28/9$767

Thu 8/1013:00 -

Nonstop11h 00m

Tue 8/1216:40 -

Nonstop10h 35m

Deal found 28/9$768

Mon 5/1011:25 -

1 stop13h 58m

Mon 12/1014:25 -

1 stop18h 00m

Deal found 28/9$770

Sat 10/1009:30 -

1 stop20h 18m

Tue 1/1211:25 -

1 stop16h 25m

Deal found 29/9$771

Find flight deals from London to San Francisco

Round-trip from	$752
One-way from	$735
Popular in	December
Cheapest in	February
Average price	$981

SWISS
12/11-26/11
3 total stops
47h 50m total
London to San Francisco

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British Airways
27/12-31/12
2 total stops
25h 49m total
London to San Francisco

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($22 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sun 10/1

19:30-16:30

2 stops29h 00m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

$745

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sat 9/1

06:35-21:30

2 stops22h 55m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

$752

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Wed 28/10

09:00-17:30

1 stop15h 30m

San Francisco

Wed 4/11

19:25-21:25

2 stops18h 00m

$752

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Thu 3/12

13:45-16:55

Nonstop11h 10m

San Francisco

Mon 7/12

12:50-07:25

Nonstop10h 35m

$765

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sun 15/11

11:35-00:06

2 stops20h 31m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

$780

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sun 24/1

11:45-14:55

Nonstop11h 10m

San Francisco

Sun 7/2

20:35-15:10

Nonstop10h 35m

$787

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Thu 22/10

08:40-21:44

1 stop21h 04m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

$797

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Sat 9/1

11:45-14:55

Nonstop11h 10m

San Francisco

Fri 29/1

17:25-11:50

Nonstop10h 25m

$819

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Mon 15/2

06:30-11:45

1 stop13h 15m

San Francisco

Sun 28/2

16:40-10:55

Nonstop10h 15m

$856

LondonSan Francisco

LHR London Heathrow - SFO San Francisco

LHRSFO

London Heathrow

Mon 23/11

06:30-11:45

1 stop13h 15m

San Francisco

Fri 27/11

16:30-16:30

1 stop16h 00m

$862

Flights are sorted by cheapest return flights first.

Deals found on 26/9

Showing 1-10 of 24 resultsSorted by cheapest first

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

LON-SFO

LHR-SFO

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

LON-SFO

LHR-SFO

What is the cheapest month to book a flight from London to San Francisco?

Currently, February is the cheapest month in which you can book a flight from London to San Francisco (average of $859). Flying from London to San Francisco in December is currently the most expensive (average of $1,231). 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.

What is the cheapest time of day to fly from LON to SFO?

When flying from London to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to San Francisco

The most flights from LON to SFO are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (25 on average).

How much does it cost for a return flight from London to San Francisco?

Airfare is below average for this route at the moment.

London to San Francisco flights typically cost between $824 and $1,160 in October.
The cheapest return price found within the last 5 days was $752 on SWISS (20 Oct–4 Nov).

How often are flights from London to San Francisco delayed?

About 13% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 144 minutes.

What is the most punctual flight time for London to San Francisco flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to San Francisco flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.

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

The best time to book flights from London to San Francisco is 22 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

What airport do you fly into for flights to San Francisco from London?
Located just 17.7 km from the city centre, San Francisco is the airport most travellers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 28 daily inbound flights from London from 0 different airlines.
How long is the flight from London to San Francisco?
For as low as $765, SWISS can have you in San Francisco from London in 11h 10m. The distance between London and San Francisco is about 8610 km. This flight may include one or multiple stops.
What are the most popular routes from London to San Francisco?
Most travellers choose London Stansted - San Francisco, London Luton - San Francisco or London Southend - San Francisco when deciding on the best route from London to San Francisco.
What are the most reliable airlines from London to San Francisco?
Before booking your flight to San Francisco from London, have a look at the most reliable airlines to get you to your destination on time: Air Canada (73%), Austrian Airlines (73%), United Airlines( 73%).
Can I find deals for flights from London to San Francisco that include hotel bookings?
Yes. In addition to deals on London to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.
Can I find deals for business class flights from London to San Francisco?
Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to San Francisco?
Currently, February is the cheapest month in which you can book a flight from London to San Francisco (average of $859). Flying from London to San Francisco in December is currently the most expensive (average of $1,231). 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.

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How does Cheapflights help users find flights from London to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from London.

Can Cheapflights find flights from London to San Francisco with no change fees?

Certainly. Search results for flights to San Francisco from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to San Francisco become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from London today and book when prices fit your budget.

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Cheap flights from London to San Francisco from $735

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to San Francisco

Cheapest flights from London to San FranciscoExplore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 October 2026.

Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 October 2026.

Best flights from London to San FranciscoDiscover carefully curated flight deals from London to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.

Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.

Direct flights from London to San FranciscoExplore direct flight options from London to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 October 2026.

Explore direct flight options from London to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 October 2026.

Last-minute flights from London to San FranciscoDiscover last-minute flight deals from London to San Francisco. Data last updated 1 October 2026 and is based on user searches.

Discover last-minute flight deals from London to San Francisco. Data last updated 1 October 2026 and is based on user searches.

One-way flights from London to San FranciscoSearch for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 1 October 2026.

Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 1 October 2026.

Find flight deals from London to San Francisco

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Use the filters below to find and compare flights from London to San Francisco that are best for you.

Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from London to San Francisco?

What is the cheapest time of day to fly from LON to SFO?

Find hourly flight availability from London to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 October 2026.

When flying from London to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from London to San Francisco

Explore weekly flight availability from London to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 1 October 2026.

The most flights from LON to SFO are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (25 on average).

How much does it cost for a return flight from London to San Francisco?

Airfare is below average for this route at the moment.

London to San Francisco flights typically cost between $824 and $1,160 in October.The cheapest return price found within the last 5 days was $752 on SWISS (20 Oct–4 Nov).

How often are flights from London to San Francisco delayed?

About 13% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 144 minutes.

What is the most punctual flight time for London to San Francisco flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Friday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to San Francisco flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.

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

The best time to book flights from London to San Francisco is 22 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Related info for your journey

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

How long is the flight from London to San Francisco?

What are the most popular routes from London to San Francisco?

What are the most reliable airlines from London to San Francisco?

Can I find deals for flights from London to San Francisco that include hotel bookings?

How can I find direct flights from London to San Francisco?

Can I find deals for business class flights from London to San Francisco?

What is the cheapest month to book a flight from London to San Francisco?

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How does Cheapflights help users find flights from London to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

Can Cheapflights find flights from London to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from London to San Francisco become cheaper?

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Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 October 2026.

Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 October 2026.

Direct flights from London to San Francisco
Explore direct flight options from London to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 October 2026.

Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 1 October 2026 and is based on user searches.

One-way flights from London to San Francisco
Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 1 October 2026.

London to San Francisco flights typically cost between $824 and $1,160 in October.
The cheapest return price found within the last 5 days was $752 on SWISS (20 Oct–4 Nov).