Question 1

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

Accepted Answer

Cheapflights users have booked flights from London to San Francisco round-trip from $814. Other airlines that can offer you cheap pricing are United Airlines, from $815, and Lufthansa, from $840. SWISS is 21% cheaper than the average price of flights available within the next 90 days to this destination. Find deals

Question 2

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

Accepted Answer

The cheapet airlines for a one-way flight from London to San Francisco are WestJet ($806), Vueling ($809), and TAP AIR PORTUGAL ($876). Find deals

Question 3

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

Accepted Answer

The best time to book flights from London to San Francisco is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight. Find deals

Question 4

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

Accepted Answer

Currently, March is the cheapest month in which you can book a flight from London to San Francisco (average of $876). Flying from London to San Francisco in December is currently the most expensive (average of $1,375). 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. Find deals

Question 5

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

Accepted Answer

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

Question 6

Weekly flight availability from London to San Francisco

Accepted Answer

The most flights from LON to SFO are scheduled on a Monday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Question 8

E

Accepted Answer

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Question 9

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

Accepted Answer

Most travellers choose London Stansted - San Francisco, London Luton - San Francisco or London Southend - San Francisco when deciding on the best route from London to San Francisco.

Question 10

What are the cheapest flights from London to San Francisco?

Accepted Answer

Looking for the cheapest flight from London to San Francisco? While on average our users pay $2,143, our data indicates the cheapest price to be $771. The most popular route (London Stansted - San Francisco), is priced around $668.

Question 11

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

Accepted Answer

Before booking your flight to San Francisco from London, have a look at the most reliable airlines to get you to your destination on time: Air New Zealand (87%), Air Canada (87%), Austrian Airlines( 87%).

Question 12

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

Accepted Answer

It’s generally more expensive to depart on a Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Question 13

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

Accepted Answer

Travellers have found it’s best to book a flight 61 days in advance to save up to 15% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 61 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to San Francisco 1-2 weeks in advance for as low as $928, or $1,094 for flights within the next 24 hours.

Question 14

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

Accepted Answer

Flights from London to San Francisco lean towards being more expensive in July. Prices are generally better when you fly from London to San Francisco in February, with the cheapest ticket starting at $691.

Question 15

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

Accepted Answer

Unlike at midday, when flights are generally more expensive, you can save up to 27% on flights from London to San Francisco by exploring options for tickets in the morning.

Question 16

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

Accepted Answer

Located just 19.0 km from the city centre, San Francisco is the airport most travellers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 41 daily inbound flights from London from 0 different airlines.

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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.

Question 19

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

Accepted Answer

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.

Question 20

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

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 21

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

Accepted Answer

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from London.

Question 22

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

Accepted Answer

Certainly. Search results for flights to San Francisco from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Question 23

Can Cheapflights notify me if prices for flights from London to San Francisco 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 San Francisco from London today and book when prices fit your budget.

Round-trip from	$814
One-way from	$796
Popular in	July
Cheapest in	February
Average price	$1,368
Good round-trip deal	$1,046 or less
Good one-way deal	$1,590 or less

Cheap flights from London to San Francisco from $796

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheap flight deals from London to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from London to San Francisco

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 3 July 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 3 July 2025.

Cheapflights Fare Finder

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

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 return flight from London to San Francisco. Price data was last updated on 27 June 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 3 July 2025.

Weekly flight availability from London to San Francisco

Explore weekly flight availability from London to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 July 2025.

Reviews of airlines servicing San Francisco

Check out reviews from past customers who have flown with Delta, KLM, andAustrian Airlines from London to San Francisco to help guide your decision. You can also see how each airline stacks up 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?

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?

Travelling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 3 July 2025.