How often are flights from London to San Francisco delayed?

Historically, on average around 15% of flights between London and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 144 minutes.

How many flights depart from London Heathrow Airport to San Francisco on average per week?

As of October 2025, 180 flights take off from London Heathrow Airport and land in San Francisco each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.

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

According to our data, Air Canada have had the fewest delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

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

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

What is the cheapest airline that flies from London Heathrow to San Francisco?

United Airlines, Delta, and SWISS are the most popular carriers operating from London Heathrow to San Francisco

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

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

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

The number of flights available between London Heathrow Airport and San Francisco is 25 per day as of October 2025. The most frequent departure time is 11:00, with 56% of daily flights leaving at midday.

When did momondo last update prices for flights from London Heathrow Airport to San Francisco Airport?

Prices for flights from London Heathrow Airport to San Francisco Airport are refreshed on a daily basis.

How old do you have to be to fly from London Heathrow Airport to San Francisco Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to San Francisco Airport.

What documentation or ID do you need to fly to San Francisco Airport?

The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$702 Cheap Flights from London Heathrow Airport to San Francisco in 2025/26

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18:30 - 14:45LHR-SFO

28h 15m1 stop

16:35 - 17:30SFO-LHR

16h 55m1 stop

$779TAP AIR PORTUGAL

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Fri, 7 Nov - Mon, 17 Nov

19:30 - 14:35LHR-SFO

27h 05m1 stop

16:40 - 16:00SFO-LHR

15h 20m1 stop

$849Scandinavian Airlines

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Wed, 12 Nov - Fri, 28 Nov

19:30 - 14:35LHR-SFO

27h 05m1 stop

16:40 - 18:30SFO-LHR

17h 50m2 stops

$852Scandinavian Airlines

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Wed, 12 Nov - Fri, 28 Nov

21:05 - 14:35LHR-SFO

25h 30m2 stops

16:40 - 18:30SFO-LHR

17h 50m2 stops

$863Scandinavian Airlines

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Wed, 12 Nov - Fri, 28 Nov

09:00 - 16:30LHR-SFO

15h 30m1 stop

11:20 - 11:50SFO-LHR

16h 30m1 stop

$936United Airlines

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Tue, 25 Nov - Tue, 2 Dec

09:00 - 16:30LHR-SFO

15h 30m1 stop

12:50 - 07:25SFO-LHR

10h 35mdirect

$938United Airlines

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Tue, 9 Dec - Wed, 14 Jan

09:00 - 16:30LHR-SFO

15h 30m1 stop

12:50 - 07:25SFO-LHR

10h 35mdirect

$941United Airlines

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Wed, 3 Dec - Tue, 9 Dec

20:05 - 16:30LHR-SFO

28h 25m1 stop

19:25 - 17:50SFO-LHR

14h 25m1 stop

$947SWISS

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Tue, 2 Dec - Tue, 9 Dec

06:30 - 11:50LHR-SFO

13h 20m1 stop

05:45 - 07:05SFO-LHR

17h 20m1 stop

$965Virgin Atlantic

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Mon, 17 Nov - Sun, 30 Nov

06:30 - 11:50LHR-SFO

13h 20m1 stop

16:30 - 10:40SFO-LHR

10h 10mdirect

$968Virgin Atlantic

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Thu, 25 Dec - Mon, 5 Jan

TAP AIR PORTUGAL flights from London Heathrow Airport to San Francisco

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to San Francisco flight tickets

TAP AIR PORTUGAL

7 Nov

LHR18:30London Heathrow

28h 15m

1 stop

SFO14:45San Francisco

17 Nov

SFO16:35San Francisco

16h 55m

1 stop

LHR17:30London Heathrow

$779

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TAP AIR PORTUGAL

7 Nov

LHR19:55London Heathrow

26h 50m

1 stop

SFO14:45San Francisco

10 Dec

SFO16:35San Francisco

16h 55m

1 stop

LHR17:30London Heathrow

$1,041

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TAP AIR PORTUGAL

7 Nov

LHR06:00London Heathrow

18h 05m

1 stop

SFO16:05San Francisco

10 Dec

SFO16:35San Francisco

16h 55m

1 stop

LHR17:30London Heathrow

$1,069

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Scandinavian Airlines flights from London Heathrow Airport to San Francisco

Our best Scandinavian Airlines deals on London Heathrow Airport to San Francisco flight tickets

Scandinavian Airlines

12 Nov

LHR19:30London Heathrow

27h 05m

1 stop

SFO14:35San Francisco

28 Nov

SFO16:40San Francisco

15h 20m

1 stop

LHR16:00London Heathrow

$849

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Scandinavian Airlines

12 Nov

LHR19:30London Heathrow

27h 05m

1 stop

SFO14:35San Francisco

28 Nov

SFO16:40San Francisco

17h 50m

2 stops

LHR18:30London Heathrow

$852

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Scandinavian Airlines

12 Nov

LHR21:05London Heathrow

25h 30m

2 stops

SFO14:35San Francisco

28 Nov

SFO16:40San Francisco

17h 50m

2 stops

LHR18:30London Heathrow

$863

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momondo Fare Finder

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LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 7/11

18:30-14:45

1 stop28h 15m

San Francisco

Mon 17/11

16:35-17:30

1 stop16h 55m

$779

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 12/11

19:30-14:35

1 stop27h 05m

San Francisco

Fri 28/11

16:40-16:00

1 stop15h 20m

$849

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 12/11

19:30-14:35

1 stop27h 05m

San Francisco

Fri 28/11

16:40-18:30

2 stops17h 50m

$852

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 12/11

21:05-14:35

2 stops25h 30m

San Francisco

Fri 28/11

16:40-18:30

2 stops17h 50m

$863

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 25/11

09:00-16:30

1 stop15h 30m

San Francisco

Tue 2/12

11:20-11:50

1 stop16h 30m

$936

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 9/12

09:00-16:30

1 stop15h 30m

San Francisco

Wed 14/1

12:50-07:25

Nonstop10h 35m

$938

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 3/12

09:00-16:30

1 stop15h 30m

San Francisco

Tue 9/12

12:50-07:25

Nonstop10h 35m

$941

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 2/12

20:05-16:30

1 stop28h 25m

San Francisco

Tue 9/12

19:25-17:50

1 stop14h 25m

$947

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/11

06:30-11:50

1 stop13h 20m

San Francisco

Sun 30/11

05:45-07:05

1 stop17h 20m

$965

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 25/12

06:30-11:50

1 stop13h 20m

San Francisco

Mon 5/1

16:30-10:40

Nonstop10h 10m

$968

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How to get the cheapest flight ticket from London Heathrow Airport to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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What is the cheapest month to fly to San Francisco?

If you aren’t able to travel during the month of February, then book flights to San Francisco from London Heathrow Airport during September instead. Flights to San Francisco in September, while not as cheap as those in February, still average around $887.

What is the cheapest day to depart on your flight to San Francisco?

According to our data, Wednesday is the cheapest day to fly to San Francisco from London Heathrow Airport. The lowest ticket price found for a Wednesday departure recently was $1,024. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to San Francisco for around $2,172.

What is the cheapest time of day to depart on your flight to San Francisco?

According to our data, the cheapest time of day to fly to San Francisco is in the morning. momondo users have found flights departing from London Heathrow Airport to San Francisco in the morning for as low as $1,019. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are $2,422 on average. Flights to San Francisco from London Heathrow Airport at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest London Heathrow to San Francisco flight route?

Fly from London Heathrow to San Francisco for the best London Heathrow - San Francisco flight prices

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

You are more likely to see cheaper flights to San Francisco from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $1,034 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from London Heathrow Airport for as low as $961 on momondo.

What cabin class options are available on London Heathrow to San Francisco flights?

There are 2 cabin classes available to choose from on London Heathrow to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to San Francisco flights?

You could potentially save up to 23% on your flight if you consider stops on a London Heathrow Airport to San Francisco flight.

How have London Heathrow Airport to San Francisco flight prices changed over time?

As of October 2025, prices for London Heathrow Airport to San Francisco flights are approximately 21% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to San Francisco according to our flight data. Find out which month and days have the cheapest flights.

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Cheap London Heathrow Airport to San Francisco (LHR to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to San Francisco

Best price found	$1,967
Fastest flight time	11h 00m
Direct flights	Every day
Airports in San Francisco	1 airport

The best flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is $1,967

The fastest flight from London Heathrow Airport to San Francisco takes 11h 00m

Direct flights go from London Heathrow Airport to San Francisco every day.

There is 1 airport near San Francisco: San Francisco (SFO)

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How far is London Heathrow to San Francisco by plane?
A flight from London Heathrow to San Francisco will travel around 8596.0 km. 13h 20m is a normal flight duration for this route.
When did momondo last update prices for flights from London Heathrow Airport to San Francisco Airport?
Prices for flights from London Heathrow Airport to San Francisco Airport are refreshed on a daily basis.
How old do you have to be to fly from London Heathrow Airport to San Francisco Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London Heathrow Airport to San Francisco?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to San Francisco is Boeing 777, representing 41.01% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 24.31%, Airbus A380-800 at 12.69%, and Boeing 777-300ER at 10.58%.

Walnut Creek

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Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

It is quick and easy to find London to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

Can I find flights from London to San Francisco with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to San Francisco flights to just show those with flexible booking policies.

How can momondo help me find flights from London to San Francisco?

momondo helps you find the best flight between London and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from London Heathrow Airport to San Francisco from $702

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How to get the cheapest flight ticket from London Heathrow Airport to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel during the month of February, then book flights to San Francisco from London Heathrow Airport during September instead. Flights to San Francisco in September, while not as cheap as those in February, still average around $887.

What is the cheapest day to depart on your flight to San Francisco?

What is the cheapest time of day to depart on your flight to San Francisco?

What is the cheapest London Heathrow to San Francisco flight route?

Fly from London Heathrow to San Francisco for the best London Heathrow - San Francisco flight prices

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

What cabin class options are available on London Heathrow to San Francisco flights?

There are 2 cabin classes available to choose from on London Heathrow to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to San Francisco flights?

You could potentially save up to 23% on your flight if you consider stops on a London Heathrow Airport to San Francisco flight.

How have London Heathrow Airport to San Francisco flight prices changed over time?

As of October 2025, prices for London Heathrow Airport to San Francisco flights are approximately 21% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from London Heathrow to San Francisco?

United Airlines, Delta, and SWISS are the most popular carriers operating from London Heathrow to San Francisco

How often are flights from London to San Francisco delayed?

Historically, on average around 15% of flights between London and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 144 minutes.

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

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

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

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

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

According to our data, Air Canada have had the fewest delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

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

The number of flights available between London Heathrow Airport and San Francisco is 25 per day as of October 2025. The most frequent departure time is 11:00, with 56% of daily flights leaving at midday.

How many flights depart from London Heathrow Airport to San Francisco on average per week?

As of October 2025, 180 flights take off from London Heathrow Airport and land in San Francisco each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.

When to book flights from London Heathrow Airport to San Francisco

Cheap London Heathrow Airport to San Francisco (LHR to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to San Francisco

Best price found

Fastest flight time

Direct flights

Airports in San Francisco

How far is London Heathrow to San Francisco by plane?

When did momondo last update prices for flights from London Heathrow Airport to San Francisco Airport?

How old do you have to be to fly from London Heathrow Airport to San Francisco Airport?

What documentation or ID do you need to fly to San Francisco Airport?

What is the most popular plane model from London Heathrow Airport to San Francisco?

Travelling to a place near San Francisco?

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

Can I find flights from London to San Francisco with flexible booking policies on momondo?

How can momondo help me find flights from London to San Francisco?

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

An easier way to manage your San Francisco trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California