Q: How much does it cost for a return flight from London Heathrow Airport to San Francisco?

Airfare is typical for this route at the moment. London Heathrow Airport to San Francisco flights typically cost between £405 and £503 in October. The cheapest return flight price found within the last 3 days was £409 on United Airlines (14 Oct-9 Dec).

Question 1

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

Accepted Answer

Airfare is typical for this route at the moment.London Heathrow Airport to San Francisco flights typically cost between £405 and £503 in October.
The cheapest return flight price found within the last 3 days was £409 on United Airlines (14 Oct-9 Dec).

Question 2

What’s the cheapest stopover airport for flights from London Heathrow Airport to San Francisco?

Accepted Answer

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £404.

Question 3

What’s the top stopover airport for flights from London Heathrow Airport to San Francisco?

Accepted Answer

Copenhagen (CPH) – chosen by Cheapflights users on 39% of one-stop itineraries from London Heathrow Airport to San Francisco on Cheapflights.

Question 4

What’s the fastest stopover option from London Heathrow Airport to San Francisco?

Accepted Answer

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 13h 17m.

Question 5

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to San Francisco?

Accepted Answer

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 06m.

Question 6

How long is the flight from London Heathrow Airport to San Francisco?

Accepted Answer

United Airlines and Delta can get you from London Heathrow Airport to San Francisco in just under 11h. Your travel time can differ by up to 4h 55m. Airlines will cover a distance of 5350 mi. This flight may include one or multiple stops.

Question 7

What are the cheapest airlines flying from London Heathrow Airport to San Francisco round-trip?

Accepted Answer

Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from £237. Other airlines that can offer you cheap pricing are TAP AIR PORTUGAL, from £350, and Scandinavian Airlines, from £351. Delta is priced at 52% lower than the current average price of a flight leaving 3 months from now.

Question 8

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

Accepted Answer

The price you pay for your flight from London Heathrow Airport to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 9

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £538). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of £803). 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.

Question 10

What is the cheapest day to fly from London Heathrow Airport to San Francisco?

Accepted Answer

Travellers seeking maximum savings on their London Heathrow Airport to San Francisco flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Question 11

Weekly flight availability from London Heathrow Airport to San Francisco

Accepted Answer

The most flights from LHR to SFO are scheduled on a Monday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 on average).

Question 12

E

Accepted Answer

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.

Question 13

E

Accepted Answer

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).

Question 14

What are the cheapest flights from London Heathrow Airport to San Francisco?

Accepted Answer

The cheapest flight price from London Heathrow Airport to San Francisco is £420. On average you can expect to pay £1,922. The most popular route, (London Heathrow - San Francisco), can usually be booked for £258.

Question 15

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

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to San Francisco on time: KLM (86%), Air France (86%), Delta (86%).

Question 16

What are the most popular airlines that fly from London Heathrow Airport to San Francisco?

Accepted Answer

The most popular airlines flying from London Heathrow Airport to San Francisco are American Airlines, Air Canada and Air France. Something to consider prior to booking your flight.

Question 17

Where are the most common stopover locations when flying from London Heathrow Airport to San Francisco?

Accepted Answer

Flights departing from London Heathrow Airport and landing in San Francisco stopover in Copenhagen most frequently. Lisbon is the second most popular location for stopovers on flights from London Heathrow Airport to San Francisco.

Question 18

Where are the least popular stopover locations for London Heathrow Airport to San Francisco flights?

Accepted Answer

London Heathrow Airport to San Francisco flights have a stopover in Dublin least often.

Question 19

What are some popular things to do or see while on a stopover in Copenhagen?

Accepted Answer

The majority of Copenhagen visitors spend their time at Tivoli, Opera House, and Højbro Plads. Tivoli, Opera House, and Højbro Plads can be visited by traveling about 5.3 mi, 4.9 mi, and 5.1 mi respectively from Kastrup Copenhagen. Those on a stopover in Copenhagen in need of a car hire can book one at Kastrup Copenhagen for about £41.

Question 20

What are some popular points of interest to see during a stopover in Lisbon?

Accepted Answer

Most Lisbon visitors opt to spend their time at Chiado, Sé de Lisboa, and Londres. Chiado, Sé de Lisboa, and Londres are located about 4.5 mi, 4.6 mi, and 2.3 mi, respectively from Lisbon Humberto Delgado. Those on a stopover in Lisbon in need of a car hire can book one at Lisbon Humberto Delgado for about £17.

Question 21

What is the cheapest day to fly round-trip from London Heathrow Airport to San Francisco?

Accepted Answer

Flights from London Heathrow Airport to San Francisco are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to San Francisco.

Question 22

How far in advance should I book a flight from London Heathrow Airport to San Francisco?

Accepted Answer

Travelers have found it’s best to book a flight 46 days in advance to save up to 22% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 46 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London Heathrow Airport to San Francisco 1-2 weeks in advance for as low as £454, or £575 for flights within the next 24 hours.

Question 23

What is the cheapest month to fly from London Heathrow Airport to San Francisco?

Accepted Answer

February is one of the best times of the year to fly to San Francisco from London Heathrow Airport. Prices for February average £499 per person but you can even find prices for as low as £338. The most expensive prices can be found in the month of July. Opting for a February flight can save you 30% on your journey compared to booking in July

Question 24

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

Accepted Answer

It’s typically best to fly out from London Heathrow Airport to San Francisco in the evening. Doing so could potentially save you 50% on the flight price compared to flying at midday, which is usually more expensive.

Question 25

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

Accepted Answer

Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London Heathrow. Booking flights from London Heathrow to San Francisco (SFO) should be relatively easy as there are 41 daily inbound flights from London Heathrow from 17 different airlines.

Question 26

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

Accepted Answer

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

Question 27

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

Accepted Answer

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

Question 28

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

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow 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.

Question 29

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

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Heathrow today with Cheapflights!

Question 30

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

Accepted Answer

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 Heathrow.

Question 31

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

Accepted Answer

Yes! Cheapflights helps users easily find flights from Heathrow to San Francisco with no change fees.

Question 32

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

Accepted Answer

Of course! You can now track prices for flights from Heathrow to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Round-trip from	£409
One-way from	£377
Popular in	July
Cheapest in	February
Average price	£447
Good round-trip deal	£475 or less
Good one-way deal	£510 or less

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£237	Average£491	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
TAP AIR PORTUGAL	Cheapest£350	Average£498	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Scandinavian Airlines	Cheapest£351	Average£557	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
SWISS	Cheapest£352	Average£394	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Aer Lingus	Cheapest£352	Average£566	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Brussels Airlines	Cheapest£359	Average£474	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Air Canada	Cheapest£360	Average£487	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£362	Average£494	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£365	Average£473	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£367	Average£556	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Cheap flights from London Heathrow Airport to San Francisco from £377

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or November, booked 82 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

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Find flight deals from Heathrow to San Francisco

Cheapest flights from Heathrow to San FranciscoExplore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2025.

Explore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2025.

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Best time to book a flight from Heathrow to San Francisco

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

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

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

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

What is the cheapest day to fly from London Heathrow Airport to San Francisco?

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

Weekly flight availability from London Heathrow Airport to San Francisco

What’s the top stopover airport for flights from London Heathrow Airport to San Francisco?

What’s the fastest stopover option from London Heathrow Airport to San Francisco?

What’s the fastest stopover option from London Heathrow Airport to San Francisco?

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to San Francisco?

Reviews of airlines servicing San Francisco

See what other customers who have flown with Austrian Airlines, United Airlines, andVirgin Atlantic from London Heathrow Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

How long is the flight from London Heathrow Airport to San Francisco?

What are the cheapest airlines flying from London Heathrow Airport to San Francisco round-trip?

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

What are the cheapest flights from London Heathrow Airport to San Francisco?

Where are the most common stopover locations when flying from London Heathrow Airport to San Francisco?

What are some popular things to do or see while on a stopover in Copenhagen?

What are some popular points of interest to see during a stopover in Lisbon?

Where are the least popular stopover locations for London Heathrow Airport to San Francisco flights?

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

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

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

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

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Top 10 airlines flying from Heathrow to San Francisco

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

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

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Cheapest flights from Heathrow to San Francisco
Explore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2025.