Question 1

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

Accepted Answer

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.

Question 2

Which airlines fly to San Francisco?

Accepted Answer

Virgin Atlantic, British Airways and Lufthansa are the top three most popular airlines that fly to San Francisco from London according to our data. Virgin Atlantic is the first choice among our users, with 39% of people opting to fly with this airline when travelling to San Francisco. Keep in mind that there are 18 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Question 3

Which stopover airport has the shortest connection time from London to San Francisco?

Accepted Answer

New York (JFK) has the shortest average stopover time for this route: 1h 18m.

Question 4

Which stopover airport offers the lowest fares from London to San Francisco?

Accepted Answer

Flights via Zurich (ZRH) offer the lowest average return price of £383.

Question 5

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

Accepted Answer

As of January 2026, prices for London to San Francisco flights are approximately 14% cheaper when compared to flights at the same time last year.

Question 6

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

Accepted Answer

There are 4 cabin classes available to choose from on London to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 7

Which stopover airport has the shortest travel time from London to San Francisco?

Accepted Answer

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 13h 54m.

Question 8

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

Accepted Answer

The cheapest day to depart on your flight to San Francisco is on a Thursday when prices can be found for as low as £572. This is often the case because there is less demand to fly during this day of the week. Flights from London to San Francisco on a Sunday will generally be more expensive and average around £673. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Question 9

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

Accepted Answer

You are more likely to see cheaper flights to San Francisco from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around £506 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 for as low as £475 on momondo.

Question 10

What is the cheapest London to San Francisco flight route?

Accepted Answer

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

Question 11

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

Accepted Answer

The number of flights available between London and San Francisco is 28 per day as of January 2026. The most frequent departure time is 11:00, with 61% of daily flights leaving at midday.

Question 12

What is the cheapest month to fly to San Francisco?

Accepted Answer

The month of February is, on average, the cheapest month to fly to San Francisco from London, with most prices found around £419. If you are unable to visit San Francisco during the month of February, then departing from London during the month September is also very affordable. Most momondo users find prices during this month for around £425.

Question 13

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

Accepted Answer

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.

Question 14

Which airport is the most popular for stopovers for flights between London and San Francisco?

Accepted Answer

Copenhagen (CPH) was the most common stop: 29% of momondo users choosing one-stop flights on this route connected there.

Question 15

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

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £397 to £581.
The lowest price recently found on this route was £383.

Question 16

How often are flights from London to San Francisco delayed?

Accepted Answer

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.

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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

Question 19

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

Accepted Answer

The number of flights available between London and San Francisco is 199 per week as of January 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

Question 20

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

Accepted Answer

Our most recent data shows that the best time of day to fly to San Francisco is in the morning. Flights from London to San Francisco during this time can be as low as £562. Try not to purchase tickets at midday because they tend to be around £898. Of course, these prices can vary depending on the time of year and what airport you fly to.

Question 21

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

Accepted Answer

Prices for flights from London to San Francisco Airport are updated daily.

Question 22

How many operators does momondo search for flights from London to San Francisco Airport?

Accepted Answer

As of January 2026, there are 18 operators available to choose from for flights from London to San Francisco Airport.

Question 23

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London to San Francisco Airport.

Question 24

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

Accepted Answer

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 license 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.

Best price found	£457
Fastest flight time	10h 55m
Direct flights	Every day
Airports in San Francisco	1 airport

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom £237	Free Cancellation	Rating 7.9 8,086 reviews	Search Delta flights
Air Canada	PriceFrom £335	Free Cancellation	Rating 7.1 10,644 reviews	Search Air Canada flights
United Airlines	PriceFrom £349	Free Cancellation	Rating 7.4 9,190 reviews	Search United Airlines flights
Aer Lingus	PriceFrom £352	Free Cancellation	Rating 7.2 1,440 reviews	Search Aer Lingus flights
Scandinavian Airlines	PriceFrom £353	Free Cancellation	Rating 7.3 1,660 reviews	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	PriceFrom £355	Free Cancellation	Rating 7.1 2,123 reviews	Search TAP AIR PORTUGAL flights
SWISS	PriceFrom £357	Free Cancellation	Rating 7.5 1,855 reviews	Search SWISS flights
Finnair	PriceFrom £373	Free Cancellation	Rating 7.6 1,353 reviews	Search Finnair flights
KLM	PriceFrom £374	Free Cancellation	Rating 7.7 1,442 reviews	Search KLM flights
British Airways	PriceFrom £374	Free Cancellation	Rating 6.7 7,690 reviews	Search British Airways flights

Cheap flights from London to San Francisco from £355

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Francisco departing on 22/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to San Francisco

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

Lufthansa flights from London to San Francisco

Our best Lufthansa deals on London to San Francisco flight tickets

TAP AIR PORTUGAL flights from London to San Francisco

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

momondo Fare Finder

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

See travel insights to San Francisco from

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

What is the typical price of a round-trip flight between London 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 to San Francisco flight route?

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

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

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

There are 4 cabin classes available to choose from on London to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of January 2026, prices for London to San Francisco flights are approximately 14% cheaper when compared to flights at the same time last year.

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

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

Which airlines fly 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 have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

Which airport is the most popular for stopovers for flights between London and San Francisco?

Copenhagen (CPH) was the most common stop: 29% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London to San Francisco?

Flights via Zurich (ZRH) offer the lowest average return price of £383.

Which stopover airport has the shortest travel time from London to San Francisco?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 13h 54m.

Which stopover airport has the shortest connection time from London to San Francisco?

New York (JFK) has the shortest average stopover time for this route: 1h 18m.

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

The number of flights available between London and San Francisco is 28 per day as of January 2026. The most frequent departure time is 11:00, with 61% of daily flights leaving at midday.

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

The number of flights available between London and San Francisco is 199 per week as of January 2026. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

When to book flights from London to San Francisco

Cheap London to San Francisco (LON to SFO) flight deals and tips

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

Best price found

Fastest flight time

Direct flights

Airports in San Francisco

How far is London to San Francisco by plane?

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

How many operators does momondo search for flights from London to San Francisco Airport?

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

What is the most popular airline from London to San Francisco?

Best airlines flying from London to San Francisco

Compare and see reviews for airlines that fly from London to San Francisco with momondo

Delta Flights From London to San Francisco

KLM Flights From London 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?