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

Prices are currently low for flights on this route. Typical prices usually range from £380 to £479. The lowest price recently found on this route was £370.

Question 1

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 £555. This is often the case because there is less demand to fly during this day of the week. Flights from London Heathrow Airport to San Francisco on a Sunday will generally be more expensive and average around £657. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Question 2

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

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £380 to £479.
The lowest price recently found on this route was £370.

Question 3

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

Accepted Answer

205 flights are operational weekly from London Heathrow Airport to San Francisco as of January 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

Question 4

How often are flights from London to San Francisco delayed?

Accepted Answer

Historically, on average around 11% 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 149 minutes.

Question 5

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

Accepted Answer

As of January 2026, 29 flights take off from London Heathrow Airport and land in San Francisco each day. The most common flight departure time for this route is 11:00, with 58% of daily flights taking off at midday.

Question 6

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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around £494 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 £465 on momondo.

Question 7

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 8

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 10% of their flights experiencing any sort of delay.

Question 9

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

Accepted Answer

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

Question 10

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

Accepted Answer

There are 4 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.

Question 11

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

Accepted Answer

Dublin (DUB) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Question 12

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 Heathrow Airport to San Francisco during this time can be as low as £551. Try not to purchase tickets at midday because they tend to be around £845. Of course, these prices can vary depending on the time of year and what airport you fly to.

Question 13

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

Accepted Answer

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.

Question 14

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 Heathrow Airport, with most prices found around £405. If you are unable to visit San Francisco during the month of February, then departing from London Heathrow Airport during the month September is also very affordable. Most momondo users find prices during this month for around £420.

Question 15

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

Accepted Answer

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

Question 16

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. Wednesday has historically seen more delays on average compared to the rest of the week.

Question 17

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

Accepted Answer

Frankfurt am Main (FRA) has the shortest average stopover time for this route: 1h 23m.

Question 18

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 Heathrow Airport 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 19

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

Accepted Answer

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 14h 10m.

Question 20

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

Accepted Answer

Flights via Frankfurt am Main (FRA) offer the lowest average return price of £358.

Question 21

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

Accepted Answer

Prices for flights from London Heathrow Airport to San Francisco Airport were last updated today.

Question 22

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

Accepted Answer

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

Question 23

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

Accepted Answer

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.

Question 24

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

Accepted Answer

The travel and health documents required for your trip to San Francisco Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best price found	£426
Fastest flight time	10h 55m
Direct flights	Every day
Airports in San Francisco	1 airport

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom £232	Free Cancellation	Rating 7.9 8,119 reviews	Search Delta flights
Air Canada	PriceFrom £328	Free Cancellation	Rating 7.1 10,660 reviews	Search Air Canada flights
United Airlines	PriceFrom £343	Free Cancellation	Rating 7.4 9,206 reviews	Search United Airlines flights
Aer Lingus	PriceFrom £344	Free Cancellation	Rating 7.2 1,442 reviews	Search Aer Lingus flights
SWISS	PriceFrom £344	Free Cancellation	Rating 7.6 1,861 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom £350	Free Cancellation	Rating 7.3 1,669 reviews	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	PriceFrom £351	Free Cancellation	Rating 7.1 2,130 reviews	Search TAP AIR PORTUGAL flights
Brussels Airlines	PriceFrom £364	Free Cancellation	Rating 7.2 381 reviews	Search Brussels Airlines flights
British Airways	PriceFrom £366	Free Cancellation	Rating 6.7 7,702 reviews	Search British Airways flights
Virgin Atlantic	PriceFrom £367	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights

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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 4 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.

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?

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

Which airlines fly to San Francisco?

How often are flights from London to San Francisco delayed?

Historically, on average around 11% 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 149 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. Wednesday 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 10% of their flights experiencing any sort of delay.

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

Dublin (DUB) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

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

Flights via Frankfurt am Main (FRA) offer the lowest average return price of £358.

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

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 14h 10m.

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

Frankfurt am Main (FRA) has the shortest average stopover time for this route: 1h 23m.

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

As of January 2026, 29 flights take off from London Heathrow Airport and land in San Francisco each day. The most common flight departure time for this route is 11:00, with 58% of daily flights taking off at midday.

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

205 flights are operational weekly from London Heathrow Airport to San Francisco as of January 2026. The most popular departure day for this route is Mon, with 15% of flights per week 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

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

How many operators does momondo search 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?

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

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