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

Airfare is below average for this route at the moment. San Francisco to London Heathrow Airport flights typically cost between £467 and £645 in September. The cheapest return flight price found within the last 3 days was £381 on Multiple Airlines (7 Sept-15 Sept).

Question 1

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

Accepted Answer

Copenhagen (CPH) – chosen by Cheapflights users on 40% of one-stop itineraries from San Francisco to London Heathrow Airport on Cheapflights.

Question 2

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

Accepted Answer

Airfare is below average for this route at the moment.San Francisco to London Heathrow Airport flights typically cost between £467 and £645 in September.
The cheapest return flight price found within the last 3 days was £381 on Multiple Airlines (7 Sept-15 Sept).

Question 3

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

Accepted Answer

Flights via Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 23m.

Question 4

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

Accepted Answer

Flights via Salt Lake City (SLC) have the shortest average one-way travel time for one-stop routes: 12h 32m.

Question 5

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

Accepted Answer

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £403.

Question 6

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

Accepted Answer

Currently priced at £361, KLM will fly you from San Francisco to London Heathrow Airport and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and TAP AIR PORTUGAL - these airlines can fly you to your destination from £383 and £387, respectively. Users have found that KLM is 36% cheaper than the other options available to this destination.

Question 7

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

Accepted Answer

Booking 54 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 8

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £112). Flying from San Francisco to London Heathrow Airport in August is currently the most expensive (average of £164). 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 9

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

Accepted Answer

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

Question 10

Weekly flight availability from San Francisco to London Heathrow Airport

Accepted Answer

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

Question 11

E

Accepted Answer

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Question 12

E

Accepted Answer

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July 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 4.0 C).

Question 13

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

Accepted Answer

On average you can expect to pay £1,221 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £266 while the most popular route, (San Francisco - London Heathrow) is currently priced at £311.

Question 14

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

Accepted Answer

Consider Aeromexico (90%), Iberia (88%) or KLM (88%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 37% on your flight compared to booking on days when demand is much higher.

Question 17

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

Accepted Answer

Find a great deal and save up to 16% by booking at least 39 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at £515.

Question 18

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

Accepted Answer

Our data shows that October tends to be the cheapest month to fly to London Heathrow Airport from San Francisco. Users have commonly found prices around £556 for the month, but tickets can be as low as £381. Due to multiple factors, prepare for potentially higher prices in June.

Question 19

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

Accepted Answer

When flying from San Francisco to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 33% versus a flight at midday.

Question 20

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

Accepted Answer

For a flight from San Francisco to London Heathrow, you will be flying from San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 42 outbound flights to London Heathrow per day. 8 airlines have flights to London Heathrow from San Francisco on a regular basis.

Question 21

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

Accepted Answer

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

Question 22

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

Accepted Answer

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

Question 23

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

Accepted Answer

Yes. Cheapflights offers flight deals from San Francisco to Heathrow 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 24

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

Accepted Answer

Cheapflights helps you search for flights from San Francisco to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 25

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

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from San Francisco to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 26

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

Accepted Answer

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

Question 27

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

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Francisco today and book when prices fit your budget.

Round-trip from	£381
One-way from	£226
Popular in	June
Cheapest in	October
Average price	£525
Good round-trip deal	£382 or less
Good one-way deal	£283 or less

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest£361	Average£458	FlexibilityNo cancel fee	On-time75%	Search KLM flights
British Airways	Cheapest£383	Average£519	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
TAP AIR PORTUGAL	Cheapest£387	Average£403	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
United Airlines	Cheapest£392	Average£595	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£393	Average£522	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£423	Average£526	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Lufthansa	Cheapest£426	Average£690	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air Canada	Cheapest£430	Average£605	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Cheap flights from San Francisco to London Heathrow Airport from £226

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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in October or September, booked 54 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from San Francisco to Heathrow

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Find flight deals from San Francisco to Heathrow

Cheapest flights from San Francisco to HeathrowExplore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 agosto 2025.

Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 agosto 2025.

Cheapflights Fare Finder

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

Best time to book a flight from San Francisco to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Francisco with our price prediction graph.

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from San Francisco to Heathrow. Price data was last updated on 8 August 2025.

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

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

Find hourly flight availability from San Francisco to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 agosto 2025.

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

Use this chart to determine the cheapest time to fly return from San Francisco to Heathrow. Price data was last updated on 10 August 2025.

Weekly flight availability from San Francisco to London Heathrow Airport

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

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

Share of one-stop return flights from San Francisco to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

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

Average return fare for one-stop flights from San Francisco to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

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

Shortest average travel time for one-stop one-way flights from San Francisco to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

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

Average stopover duration for one-stop one-way flights from San Francisco to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Heathrow

See what other customers who have flown with United Airlines, Virgin Atlantic, andIberia from San Francisco to London Heathrow Airport 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 San Francisco to Heathrow. 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 from for flights from San Francisco to London Heathrow?

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

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

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

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

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

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

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

Travelling to a place near London Heathrow Airport?

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Alternative routes for San Francisco to Heathrow

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Top 8 airlines flying from San Francisco to Heathrow

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

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

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

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

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Cheapest flights from San Francisco to Heathrow
Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 agosto 2025.