Question 1

What is the cheapest month to fly to London?

Accepted Answer

The cheapest month to fly to London from San Francisco is in September. Flight prices, which tend to average around $663, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from San Francisco averaging around $666.

Question 2

What is the cheapest San Francisco to London flight route?

Accepted Answer

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

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Question 5

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

Accepted Answer

As of November 2025, 211 flights take off from San Francisco and land in London each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

Question 6

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

Accepted Answer

Delta, United Airlines, and LEVEL are the most popular carriers operating from San Francisco to London

Question 7

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

Accepted Answer

Flights via Lisbon (LIS) offer the lowest average round-trip price of $490.

Question 8

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

Accepted Answer

Flying to London from San Francisco in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $856 when looking at flights departing in the afternoon. Flights to London are more costly at noon, with an average ticket price of $977. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 9

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

Accepted Answer

As of November 2025, prices for San Francisco to London flights are approximately 6% cheaper when compared to flights at the same time last year.

Question 10

How far in advance should I book a flight to London?

Accepted Answer

You are more likely to see cheaper flights to London from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $767 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Francisco for as low as $725 on momondo.

Question 11

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

Accepted Answer

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Question 12

How often are flights from San Francisco to London delayed?

Accepted Answer

Historically, on average around 12% of flights between San Francisco and London have experienced a delay on any given week. The average delay length over the past 12 months has been 157 minutes.

Question 13

What is the cheapest day to depart on your flight to London?

Accepted Answer

The cheapest day to depart from San Francisco to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $816. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $949. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Question 14

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

Accepted Answer

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Question 15

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

Accepted Answer

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 13h 16m.

Question 16

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

Accepted Answer

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 28m.

Question 17

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

Accepted Answer

Copenhagen (CPH) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

Question 18

What airlines fly to London?

Accepted Answer

United Airlines, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London from San Francisco according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to London. Keep in mind that there are 17 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Question 19

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

Accepted Answer

30 flights are operational daily from San Francisco to London as of November 2025. The most popular departure time for this route is 5:00PM, with 72% of flights per day taking off in the afternoon.

Question 20

Which airlines fly direct from San Francisco to London?

Accepted Answer

The fastest flight from San Francisco to London takes 9h 15min and various airlines offer direct flights for this route. These include Norse Atlantic UK, Virgin Atlantic, American Airlines, Iberia, British Airways, Finnair, Lufthansa, and Envoy Air. You can depart from several airports in San Francisco including San Francisco Airport (SFO), San Jose Airport (SJC), and Oakland Airport (OAK) depending on the flight you choose. The arrival airport also varies with the different airline flights landing at London Heathrow Airport (LHR), London Gatwick Airport (LGW), and London City Airport (LCY) depending on the departure airport and airline chosen.

What is the best way to get in and out of airports in San Francisco and London?

BART provides an affordable and convenient way to commute to and from San Francisco Airport (SFO) and Oakland Airport (OAK) and various destinations in the Bay Area, including downtown San Francisco and Oakland. You can take the BART directly from the airport. You can take the BART shuttle bus from the OAK airport to the Coliseum station, and then take the BART to the train and then to your destination. VTA Route 60 (Airport Flyer): This bus service connects San Jose International Airport (SJC) to the Milpitas BART Station and Winchester VTA Station. It is a cheap and convenient option for getting to and from SJC airport. London City Airport (LCY) is located in East London and offers DLR (Docklands Light Railway) and underground, to and from the city. Gatwick Airport (LGW) is located south of London and offers train (Gatwick Express or Southern Rail) and coach to and from the city. Heathrow Airport (LHR) is well-connected to the city by train (Heathrow Express or TfL Rail), underground (Piccadilly Line), and bus.

What are the benefits of the different airports in San Francisco and London?

San Francisco International Airport (SFO) is the largest airport in Northern California and offers a wide range of domestic and international flights. SFO is known for its modern facilities and efficient terminal operations, making it a popular choice for travelers. Oakland Airport (OAK) is located in the East Bay and offers a variety of domestic and international flights. It offers convenient and affordable parking options to travelers. San Jose International Airport (SJC) is located in the heart of Silicon Valley and offers security checks as the traffic is minimal. London Heathrow Airport (LHR) is one of the busiest airports in the world and offers a wide range of domestic and international flights. It is well-connected with several public transportation options making it easily accessible. London City Airport (LCY) is located in the heart of London and is known for its convenience and fast check-in and security procedures. London Gatwick Airport (LGW) offers convenient parking options and a range of shopping and dining options.

Which cities can you get to from London Heathrow Airport (LHR)?

London Heathrow Airport (LHR) is the largest airport in the United Kingdom and offers a variety of transportation options for travelers to reach different cities and destinations. The city of London is easily accessible from LHR via the Heathrow Express train or the London Underground, which takes about 15-30 minutes. Southampton is located about 75 miles southwest of London and can be reached from LHR via a combination of train and bus or car. There is no direct train service between LHR and Southampton, but you can take a train to London Waterloo Station and then transfer to a train to Southampton. Cambridge is located about 75 miles north of London and can be reached from LHR via a combination of train and bus or car. You can take a train from LHR to London Kings Cross station and then transfer to a train to Cambridge. These cities are also accessible by taxi or you can rent a car at the airport.

Question 21

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

Accepted Answer

Prices for flights from San Francisco Airport to London refresh daily.

Question 22

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

Accepted Answer

There are 18 operators available for flights from San Francisco Airport to London as of November 2025.

Question 23

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

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 San Francisco Airport to London.

Question 24

What documentation or ID do you need to fly to London?

Accepted Answer

The travel and health documents required for your trip to London 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 London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best Price Found	$397
Fastest flight time	10h 10m
Direct flights	Every day
Airports in London	1 airport

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $151	Free Cancellation	Rating 7.2 2,905 reviews	Search JetBlue flights
Scandinavian Airlines	PriceFrom $328	Free Cancellation	Rating 7.4 1,589 reviews	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	PriceFrom $426	Free Cancellation	Rating 7.1 2,074 reviews	Search TAP AIR PORTUGAL flights
Finnair	PriceFrom $465	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
Alaska Airlines	PriceFrom $494	Free Cancellation	Rating 8.0 11,353 reviews	Search Alaska Airlines flights
SWISS	PriceFrom $513	Free Cancellation	Rating 7.5 1,794 reviews	Search SWISS flights
British Airways	PriceFrom $514	Free Cancellation	Rating 6.7 7,539 reviews	Search British Airways flights
Delta	PriceFrom $552	Free Cancellation	Rating 7.9 7,998 reviews	Search Delta flights
Lufthansa	PriceFrom $557	Free Cancellation	Rating 6.8 7,594 reviews	Search Lufthansa flights
United Airlines	PriceFrom $570	Free Cancellation	Rating 7.4 9,046 reviews	Search United Airlines flights

Cheap flights from San Francisco to London from $368

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Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London?

What is the cheapest day to depart on your flight to London?

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

What is the cheapest San Francisco to London flight route?

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

How far in advance should I book a flight to London?

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

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

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

As of November 2025, prices for San Francisco to London flights are approximately 6% cheaper when compared to flights at the same time last year.

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

Delta, United Airlines, and LEVEL are the most popular carriers operating from San Francisco to London

What airlines fly to London?

How often are flights from San Francisco to London delayed?

Historically, on average around 12% of flights between San Francisco and London have experienced a delay on any given week. The average delay length over the past 12 months has been 157 minutes.

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

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

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

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

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

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

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

Copenhagen (CPH) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Lisbon (LIS) offer the lowest average round-trip price of $490.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 13h 16m.

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

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 28m.

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

30 flights are operational daily from San Francisco to London as of November 2025. The most popular departure time for this route is 5:00PM, with 72% of flights per day taking off in the afternoon.

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

As of November 2025, 211 flights take off from San Francisco and land in London each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

When to book flights from San Francisco to London

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

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

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

What documentation or ID do you need to fly to London?

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

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