Question 1

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 £567 when searching weeks before you fly. 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 £535 on momondo.

Question 2

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

Accepted Answer

As of January 2026, there are 211 flights per week flying from San Francisco to London. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

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

Which airlines fly to London?

Accepted Answer

United Airlines, Virgin Atlantic and British Airways 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 35% of people opting to fly with this airline when travelling to London. Keep in mind that there are 7 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Question 5

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 6

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

Accepted Answer

Flights connecting via Copenhagen (CPH) have the shortest average one-way travel time: 14h 00m.

Question 7

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

Accepted Answer

Flights via Copenhagen (CPH) offer the lowest average return price of £364.

Question 8

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

Accepted Answer

The number of flights available between San Francisco and London is 30 per day as of January 2026. The most frequent departure time is 17:00, with 80% of daily flights leaving in the afternoon.

Question 9

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 156 minutes.

Question 10

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

Accepted Answer

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

Question 11

What is the cheapest month to fly to London?

Accepted Answer

The cheapest month to fly to London from San Francisco is in January. Flight prices, which tend to average around £486, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from San Francisco averaging around £489.

Question 12

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

Accepted Answer

Copenhagen (CPH) was the most common stop: 86% of momondo users choosing one-stop flights on this route connected there.

Question 13

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

Accepted Answer

Copenhagen (CPH) has the shortest average stopover time for this route: 1h 10m.

Question 14

Can stopping save me money on San Francisco to London flights?

Accepted Answer

You could potentially save up to 7% on your flight if you consider stops on a San Francisco to London flight.

Question 15

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

Accepted Answer

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £499. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to London for around £633.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £546. Flights at midday are often more expensive, with an average ticket price of £798.

Question 18

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

Accepted Answer

SWISS, Aer Lingus, and Finnair are the most popular carriers operating from San Francisco to London

Question 19

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 departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Question 20

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

Accepted Answer

As of January 2026, prices for San Francisco to London flights are approximately 30% more expensive when compared to flights at the same time last year.

Question 21

Which airlines fly direct from San Francisco to London?

Accepted Answer

There are many flight options from San Francisco to London, including direct flights. Iberia flies from San Francisco Airport (SFO) direct to London Heathrow each day. The travel time on San Francisco to London flights is around 10 hours and 15 minutes. Brussels Airlines flies this route to Heathrow, as does Virgin, British Airways and Finnair. It's a popular route, and several US airlines also offer flights between these two airports. United Airlines, for example, has daily flights. If you want to land at another London airport, you will usually have a stopover in another city or country. Turkish airlines connect San Francisco with London Gatwick by stopping at Istanbul (IST) for around one hour 45 minutes. Virgin flies to London City Airport by transiting through Amsterdam (AMS). Lufthansa also offers one-way flights from San Francisco to London City Airport via their Frankfurt hub. There's a six-hour stopover on this flight.

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

You can quickly reach San Francisco Airport with the BART Rapid rail service. This transport service connects northern San Mateo County, San Francisco and the East Bay to the airport. You can take the Caltrain Commuter Rail to Millbrae BART Station from San Francisco and San Jose and then take the train to the airport. You can also take public bus routes SFO, 292 and 398 to get to the airport from central San Francisco. On arrival in London Heathrow, it's easy to get to central London. From Heathrow, take the Heathrow Express train service, a high-speed non-stop train that takes you to the city of London. You can also take the London Underground from Heathrow to Central London. Heathrow has an extensive car hire service and is located beside major motorways, allowing you easy access to the UK by road. To get to the London city centre from Gatwick airport, take the Gatwick Express train to London. You can also take a National Express direct bus service.

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

San Francisco is a major global transport hub with excellent passenger amenities. Find on-site hotels, business lounges, fast track services, shops, restaurants, bars, cash machines and currency exchange desks. The airport offers a support service for anyone travelling with limited mobility. Heathrow is also one of the largest airports in the world and offers a full range of services. There are hotels on the Heathrow campus, great onward travel connections, and a range of business and first-class lounges. If you like shopping, you'll find many shops. There are also bars and restaurants, and changing areas and feeding rooms for parents with babies. London Gatwick offers similar services, while London City is smaller but has everything you need.

Question 22

Which cities can you reach easily once you arrive at London airports?

Accepted Answer

It's easy to get to other parts of the UK from London airports. There are great transport connections between airports and central London travel hubs. Trains arriving in Victoria train or coach station, for example, can travel onward to many other parts of the UK. Transport connections from Heathrow can also directly connect you to other nearby cities. For example, you can reach Oxford, Birmingham or Bristol by road or rail from Heathrow. It's easy to reach other cities from Gatwick, like Brighton, Norwich or Nottingham, especially if you are travelling by car. If you're travelling to destinations close to London such as Reading, then Heathrow is the nearest airport. Luton Airport is well-connected if you're travelling to Watford. And, London City Airport is very accessible for towns such as Croydon or Romford.

Question 23

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 were last updated today.

Question 24

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

Accepted Answer

There are 7 operators available for flights from San Francisco Airport to London as of January 2026.

Question 25

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to London.

Question 26

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	£286
Fastest flight time	10h 10m
Direct flights	Every day
Airports in London	6 airports

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom £355	Free Cancellation	Rating 7.3 1,637 reviews	Search Scandinavian Airlines flights
KLM	PriceFrom £364	Free Cancellation	Rating 7.7 1,434 reviews	Search KLM flights
Virgin Atlantic	PriceFrom £368	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £386	Free Cancellation	Rating 6.7 7,659 reviews	Search British Airways flights
United Airlines	PriceFrom £403	Free Cancellation	Rating 7.4 9,142 reviews	Search United Airlines flights
Lufthansa	PriceFrom £412	Free Cancellation	Rating 6.8 7,698 reviews	Search Lufthansa flights
Iberia	PriceFrom £425	Free Cancellation	Rating 7.0 3,079 reviews	Search Iberia flights

Cheap flights from San Francisco to London from £283

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 25/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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