How long is the flight from London to San Francisco?

There are many flights that can get you from London to San Francisco in 11h 05m. Fly via United Airlines, Austrian Airlines, or Virgin Atlantic to get the fastest option. There are 5350 mi between London and San Francisco. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

British Airways, at $509, was found to be the cheapest airline from London to San Francisco.Alternate airlines to your destination round-trip include Brussels Airlines and Austrian Airlines. You may be able to fly from London to San Francisco for 23% less than the average price by searching for these airlines.

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

The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $479. However, be on the lookout for offers from KLM and Virgin Atlantic, as they are both options that can get you from London to San Francisco for a low price.

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

The price you pay for your flight from London to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from London to San Francisco (average of $276). Flying from London to San Francisco in June is currently the most expensive (average of $357). 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.

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

Travelers seeking maximum savings on their London to San Francisco flight should consider departing on Thursday at noon when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London to San Francisco

The most flights from LON to SFO 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).

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What are the most popular routes from London to San Francisco?

When deciding which route to take from London to San Francisco consider London Heathrow - San Francisco, London Gatwick - San Francisco or London City - San Francisco as they are the most popular.

What are the cheapest flights from London to San Francisco?

While on average a flight from London to San Francisco is generally $2,060, our data shows the cheapest flight currently is $562. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $441 for that flight.

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

No one likes to see their flight delayed. When booking a flight from London to San Francisco consider choosing KLM (86%), Air France (86%) or Delta (86%) as they are the most reliable in getting you off to your destination on time.

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

Consider American Airlines, British Airways or Delta when booking your flight. These represent the most popular airlines when flying from London to San Francisco.

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

Saturday flights are found to be more expensive to fly from London to San Francisco. 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.

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

To save on the cost of your flight from London to San Francisco, book at least 46 days before your planned departure. Booking around this time can save you about 19% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $598 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $732.

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

February can be a great time to fly to San Francisco from London with a flight ticket averaging about $664. Cheapflights users have found deals in the month of February for as cheap as $452. The most expensive prices can be found in the month of July.

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

It’s optimal to fly from London to San Francisco in the evening. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight in the morning.

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

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. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 42 daily inbound flights from London from 10 different airlines.

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

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

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

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

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

Yes. Cheapflights offers flight deals from London 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.

$458+ Flights from London to San Francisco

Round-trip from	$525 (Air Canada)
One-way from	$458 (ezTravel 易遊網)
Popular in	July
Cheapest in	February
Average price	$575
Good round-trip deal	$619 or less
Good one-way deal	$622 or less

United's Polaris Business Class features lie-flat seats and Saks Fifth Avenue bedding for ultimate comfort.

United's Premium Plus offers upgraded comfort with bigger seats and extra legroom on international flights.

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$509	Average$663	FlexibilityNo cancel fee	On-time70%
Brussels Airlines	Cheapest$530	Average$692	FlexibilityNo cancel fee	On-timeN/A
Austrian Airlines	Cheapest$539	Average$736	FlexibilityNo cancel fee	On-time78%
United Airlines	Cheapest$541	Average$682	FlexibilityNo cancel fee	On-time69%
Virgin Atlantic	Cheapest$550	Average$736	FlexibilityNo cancel fee	On-time72%
Delta	Cheapest$555	Average$708	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$578	Average$808	FlexibilityNo cancel fee	On-time77%
Lufthansa	Cheapest$579	Average$712	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$596	Average$748	FlexibilityNo cancel fee	On-time71%
Iberia	Cheapest$596	Average$762	FlexibilityNo cancel fee	On-time77%

$458+ Cheap flights from London (LON) to San Francisco (SFO)

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 11/30. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from London to San Francisco are usually found in February or September, booked 86 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

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

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

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Best time to book a flight from London to San Francisco

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from London to San Francisco. Price data was last updated on September 12, 2025.

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

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

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

Weekly flight availability from London to San Francisco

Reviews of airlines servicing San Francisco

See what other customers who have flown with Delta, Austrian Airlines, and United Airlines from London 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 London 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?

How long is the flight from London to San Francisco?

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

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

What are the most popular routes from London to San Francisco?

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

What are the cheapest flights from London to San Francisco?

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

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

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

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

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