How often are flights from London to San Francisco delayed?

Historically, on average around 13% 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 141 minutes.

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.

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?

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

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

According to our data, Virgin Atlantic has had the least delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

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 updated daily.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to San Francisco Airport.

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

The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

C$ 683 Cheap Flights from London Heathrow Airport to San Francisco in 2026

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

The number of flights available between London Heathrow Airport and San Francisco is 212 per week as of January 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

Q: 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 30 per day as of January 2026. The most frequent departure time is 11:00a.m., with 60% of daily flights leaving at noon.

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Find the cheapest flights from London Heathrow Airport to San Francisco

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:25 p.m. - 4:30 p.m.

LHR

SFO

31h 05m

2 stops

7:25 p.m. - 5:50 p.m.

SFO

LHR

14h 25m

1 stop

C$ 726SWISS

Sat, 31 Jan - Sat, 7 Feb

9:50 a.m. - 3:35 p.m.

LHR

SFO

13h 45m

1 stop

10:30 p.m. - 10:10 p.m.

SFO

LHR

15h 40m

1 stop

C$ 727British Airways

Wed, 28 Jan - Sat, 31 Jan

3:20 p.m. - 11:04 p.m.

LHR

SFO

15h 44m

1 stop

5:25 p.m. - 12:00 p.m.

SFO

LHR

10h 35mdirect

C$ 729United Airlines

Sat, 21 Feb - Sat, 7 Mar

8:50 a.m. - 5:35 p.m.

LHR

SFO

15h 45m

1 stop

4:59 p.m. - 3:05 p.m.

SFO

LHR

14h 06m

1 stop

C$ 732British Airways

Sun, 15 Mar - Sun, 5 Apr

8:40 a.m. - 4:15 p.m.

LHR

SFO

15h 35m

1 stop

7:30 p.m. - 2:10 p.m.

SFO

LHR

10h 40mdirect

C$ 733United Airlines

Wed, 8 Apr - Tue, 14 Apr

7:50 a.m. - 3:35 p.m.

LHR

SFO

15h 45m

1 stop

4:59 p.m. - 3:05 p.m.

SFO

LHR

14h 06m

1 stop

C$ 734British Airways

Sat, 7 Mar - Sun, 5 Apr

11:35 a.m. - 8:10 p.m.

LHR

SFO

16h 35m

2 stops

10:40 p.m. - 9:00 p.m.

SFO

LHR

15h 20m

1 stop

C$ 736United Airlines

Thu, 5 Mar - Sat, 21 Mar

9:50 a.m. - 3:35 p.m.

LHR

SFO

13h 45m

1 stop

2:27 p.m. - 12:15 p.m.

SFO

LHR

13h 48m

1 stop

C$ 737British Airways

Tue, 27 Jan - Sat, 14 Feb

7:25 a.m. - 2:35 p.m.

LHR

SFO

15h 10m

1 stop

10:25 a.m. - 10:10 a.m.

SFO

LHR

15h 45m

1 stop

C$ 739United Airlines

Tue, 19 May - Tue, 26 May

11:35 a.m. - 8:10 p.m.

LHR

SFO

16h 35m

2 stops

8:30 a.m. - 6:30 a.m.

SFO

LHR

14h 00m

1 stop

C$ 740United Airlines

Sat, 28 Feb - Sat, 7 Mar

SWISS flights from London Heathrow Airport to San Francisco

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

SWISS

31 Jan

LHR5:25 p.m.London Heathrow

31h 05m

2 stops

SFO4:30 p.m.San Francisco

7 Feb

SFO7:25 p.m.San Francisco

14h 25m

1 stop

LHR5:50 p.m.London Heathrow

C$ 726

SWISS

28 Jan

LHR9:00 a.m.London Heathrow

15h 30m

1 stop

SFO4:30 p.m.San Francisco

1 Feb

SFO7:25 p.m.San Francisco

28h 50m

2 stops

LHR8:15 a.m.London Heathrow

C$ 727

SWISS

2 Feb

LHR2:25 p.m.London Heathrow

34h 05m

2 stops

SFO4:30 p.m.San Francisco

9 Feb

SFO7:25 p.m.San Francisco

18h 00m

2 stops

LHR9:25 p.m.London Heathrow

C$ 762

United Airlines flights from London Heathrow Airport to San Francisco

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

United Airlines

22 Jan

LHR2:30 p.m.London Heathrow

14h 04m

1 stop

SFO8:34 p.m.San Francisco

4 Feb

SFO8:25 a.m.San Francisco

14h 45m

1 stop

LHR7:10 a.m.London Heathrow

C$ 726

United Airlines

28 Jan

LHR11:35 a.m.London Heathrow

16h 32m

2 stops

SFO8:07 p.m.San Francisco

4 Feb

SFO10:37 a.m.San Francisco

15h 03m

2 stops

LHR9:40 a.m.London Heathrow

C$ 729

United Airlines

8 Apr

LHR8:40 a.m.London Heathrow

15h 35m

1 stop

SFO4:15 p.m.San Francisco

13 Apr

SFO9:15 p.m.San Francisco

15h 25m

1 stop

LHR8:40 p.m.London Heathrow

C$ 733

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 31/1

5:25 p.m.-4:30 p.m.

2 stops31h 05m

San Francisco

Sat 7/2

7:25 p.m.-5:50 p.m.

1 stop14h 25m

C$ 726

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 28/1

9:50 a.m.-3:35 p.m.

1 stop13h 45m

San Francisco

Sat 31/1

10:30 p.m.-10:10 p.m.

1 stop15h 40m

C$ 727

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 21/2

3:20 p.m.-11:04 p.m.

1 stop15h 44m

San Francisco

Sat 7/3

5:25 p.m.-12:00 p.m.

Nonstop10h 35m

C$ 729

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 15/3

8:50 a.m.-5:35 p.m.

1 stop15h 45m

San Francisco

Sun 5/4

4:59 p.m.-3:05 p.m.

1 stop14h 06m

C$ 732

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/4

8:40 a.m.-4:15 p.m.

1 stop15h 35m

San Francisco

Tue 14/4

7:30 p.m.-2:10 p.m.

Nonstop10h 40m

C$ 733

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 7/3

7:50 a.m.-3:35 p.m.

1 stop15h 45m

San Francisco

Sun 5/4

4:59 p.m.-3:05 p.m.

1 stop14h 06m

C$ 734

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 5/3

11:35 a.m.-8:10 p.m.

2 stops16h 35m

San Francisco

Sat 21/3

10:40 p.m.-9:00 p.m.

1 stop15h 20m

C$ 736

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 27/1

9:50 a.m.-3:35 p.m.

1 stop13h 45m

San Francisco

Sat 14/2

2:27 p.m.-12:15 p.m.

1 stop13h 48m

C$ 737

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 19/5

7:25 a.m.-2:35 p.m.

1 stop15h 10m

San Francisco

Tue 26/5

10:25 a.m.-10:10 a.m.

1 stop15h 45m

C$ 739

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 28/2

11:35 a.m.-8:10 p.m.

2 stops16h 35m

San Francisco

Sat 7/3

8:30 a.m.-6:30 a.m.

1 stop14h 00m

C$ 740

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Delays

Other information

What is the typical price of a round-trip flight between London Heathrow Airport and San Francisco?

What is the cheapest month to fly to San Francisco?

The cheapest month to fly to San Francisco from London Heathrow Airport is in February. Flight prices, which tend to average around C$ 782, are often lower during this time because this is during the off-season. The month of September is another great option to travel to San Francisco, with average flight prices from London Heathrow Airport averaging around C$ 802.

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

The cheapest day to depart from London Heathrow Airport to San Francisco is on a Thursday. Travellers who choose to depart for San Francisco on a Thursday will often find tickets for as low as C$ 806. On the other hand, Monday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,877.

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

Flying to San Francisco from London Heathrow Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as C$ 990 when looking at flights departing in the afternoon. In contrast, the most expensive time of day to depart to San Francisco is in the morning when prices are around C$ 1,669.

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 C$ 944 when searching weeks out. 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 C$ 887 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?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to San Francisco.

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

As of January 2026, prices for London Heathrow Airport to San Francisco flights are approximately 11% cheaper 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.

Estimated round-trip price

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	C$ 3,058
Fastest flight time	11h 00m
Direct flights	Every day
Airports in San Francisco	1 airport

The best one-way flight to San Francisco from London Heathrow Airport in the past 72 hours is C$ 3,058. The best round-trip flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is C$ 3,883.

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 in San Francisco. From London Heathrow Airport there are direct flights to San Francisco (SFO).

Search flight deals

How far is London Heathrow to San Francisco by plane?
San Francisco is 8596.0 km away from London Heathrow. Flights usually cover this in 11h 00m, depending on flying conditions and air traffic around both airports.
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 updated daily.
How old do you have to be to fly from London Heathrow Airport to San Francisco Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport to San Francisco is Boeing 777 (33.31% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (20.76%), Airbus A380-800 (19.18%), and Boeing 777-300ER (13.68%).

San Mateo

Belmont

Los Altos

San Bruno

Santa Cruz

Newark

Milpitas

Carmel-by-the-Sea

Turlock

South San Francisco

Palo Alto

Burlingame

Santa Clara

Cupertino

Mill Valley

Pacifica

Morgan Hill

Los Banos

Mountain View

Woodland

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to San Francisco . Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to San Francisco from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

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.

An easier way to manage your San Francisco trip

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Cheap flights from London Heathrow Airport to San Francisco from C$ 683

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Find the cheapest flights from London Heathrow Airport to San Francisco

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SWISS flights from London Heathrow Airport to San Francisco

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

United Airlines flights from London Heathrow Airport to San Francisco

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

momondo Fare Finder

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

See travel insights to San Francisco from

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

What is the typical price of a round-trip flight between London Heathrow Airport and San Francisco?

What is the cheapest month to fly to San Francisco?

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?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to San Francisco.

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

As of January 2026, prices for London Heathrow Airport to San Francisco flights are approximately 11% cheaper when compared to flights at the same time last year.

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

SWISS and United Airlines 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 13% 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 141 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, Virgin Atlantic has had the least delays on this route over the last 12 months, with about 11% 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 30 per day as of January 2026. The most frequent departure time is 11:00a.m., with 60% of daily flights leaving at noon.

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

The number of flights available between London Heathrow Airport and San Francisco is 212 per week as of January 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving 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, organize 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