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 £663 and £493 in September. The cheapest return flight price found within the last 3 days was £497 on Scandinavian Airlines (27 Sept-21 Oct).

Question 1

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 11m.

Question 2

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

Accepted Answer

Over the past year, British Airways have had the lowest number of delays on this route, with just 9% of flights being delayed.

Question 3

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

Accepted Answer

Copenhagen (CPH) – chosen by Cheapflights users on 29% of one-stop itineraries from San Francisco to London Heathrow Airport on Cheapflights.

Question 4

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

Accepted Answer

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

Question 5

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

Accepted Answer

Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Question 6

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 £369.

Question 7

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 £663 and £493 in September.
The cheapest return flight price found within the last 3 days was £497 on Scandinavian Airlines (27 Sept-21 Oct).

Question 8

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 9

How often are flights from San Francisco to London delayed?

Accepted Answer

About 11% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 155 minutes.

Question 10

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

Accepted Answer

Airlines like KLM and Delta fly from San Francisco to London Heathrow Airport in about 10h 15m. The time it takes to get you to your destination can typically vary by up to 2h 20m. Airlines will cover a distance of 5350 mi. This flight may include one or multiple stops.

Question 11

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

Accepted Answer

Currently priced at £365, Virgin Atlantic will fly you from San Francisco to London Heathrow Airport and back. In addition to Virgin Atlantic, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and Lufthansa - these airlines can fly you to your destination from £366 and £368, respectively. Users have found that Virgin Atlantic is 36% cheaper than the other options available to this destination.

Question 12

What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?

Accepted Answer

To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at £242. Virgin Atlantic flights start at £259 while deals on KLM start at £263 one-way.

Question 13

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

Accepted Answer

Booking 30 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 14

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

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £478). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £827). 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 15

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 Tuesday evenings when fares are most often at their lowest. Saturday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Question 16

Weekly flight availability from San Francisco to London Heathrow Airport

Accepted Answer

The most flights from SFO to LHR are scheduled on a Monday (37 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (37 on average).

Question 17

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 18

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 19

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

Accepted Answer

On average you can expect to pay £1,321 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £294 while the most popular route, (San Francisco - London Heathrow) is currently priced at £498.

Question 20

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

Accepted Answer

Consider American Airlines (91%), Alaska Airlines (91%) or British Airways (91%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.

Question 21

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 Virgin Atlantic, United Airlines and British Airways. Something to consider prior to booking your flight.

Question 22

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 28% versus a flight at midday.

Question 23

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 11.0 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 37 outbound flights to London Heathrow per day. 5 airlines have flights to London Heathrow from San Francisco on a regular basis.

Question 24

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 25

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 26

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 27

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 28

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 29

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 30

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	£497
One-way from	£294
Popular in	June
Cheapest in	February
Average price	£550
Good round-trip deal	£499 or less
Good one-way deal	£330 or less

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£365	Average£515	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£366	Average£700	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Lufthansa	Cheapest£368	Average£646	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£383	Average£506	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£392	Average£576	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Cheap flights from San Francisco to London Heathrow Airport from £294

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 17 April 2026.

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 17 April 2026.

Best flights from San Francisco to HeathrowDiscover carefully curated flight deals from San Francisco to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2026.

Discover carefully curated flight deals from San Francisco to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2026.

Direct flights from San Francisco to HeathrowExplore direct flight options from San Francisco to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2026.

Explore direct flight options from San Francisco to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2026.

Last-minute flights from San Francisco to HeathrowDiscover last-minute flight deals from San Francisco to Heathrow. Data last updated 17 April 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to Heathrow. Data last updated 17 April 2026 and is based on user searches.

One-way flights from San Francisco to HeathrowSearch for one-way flight options from San Francisco to Heathrow. Find affordable one-way fares based on user searches. Data last updated 17 April 2026.

Search for one-way flight options from San Francisco to Heathrow. Find affordable one-way fares based on user searches. Data last updated 17 April 2026.

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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?

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?

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

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

Weekly flight availability from San Francisco to London Heathrow Airport

How often are flights from San Francisco to London delayed?

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

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

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

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

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

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

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

Reviews of airlines servicing Heathrow

See what other customers who have flown with KLM,Virgin Atlantic, andUnited Airlines 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?

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

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

What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?

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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Complete your trip

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Direct flights to England

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Search flights from San Francisco to Heathrow by cabin class

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Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 April 2026.

San Francisco and Heathrow flights

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Top 5 airlines flying from San Francisco to Heathrow

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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 17 April 2026.

Best flights from San Francisco to Heathrow
Discover carefully curated flight deals from San Francisco to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 April 2026.

Direct flights from San Francisco to Heathrow
Explore direct flight options from San Francisco to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2026.

Last-minute flights from San Francisco to Heathrow
Discover last-minute flight deals from San Francisco to Heathrow. Data last updated 17 April 2026 and is based on user searches.

One-way flights from San Francisco to Heathrow
Search for one-way flight options from San Francisco to Heathrow. Find affordable one-way fares based on user searches. Data last updated 17 April 2026.