Q: How much does it cost for a return flight from London to San Francisco?

Airfare is below average for this route at the moment. London to San Francisco flights typically cost between $1,013 and $1,600 in September. The cheapest return flight price found within the last 3 days was $861 on United Airlines (17 Sept-21 Sept). Find deals

Question 1

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

Accepted Answer

Airfare is below average for this route at the moment.London to San Francisco flights typically cost between $1,013 and $1,600 in September.
The cheapest return flight price found within the last 3 days was $861 on United Airlines (17 Sept-21 Sept). Find deals

Question 2

How long is the flight from London to San Francisco?

Accepted Answer

For as low as $970, United Airlines can have you in San Francisco from London in 14h 05m. The distance between London and San Francisco is about 8631 km. This flight may include one or multiple stops. Find deals

Question 3

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 TAP AIR PORTUGAL ($931), WestJet ($1,170), and Delta ($1,207). Find deals

Question 4

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 5

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.

Question 6

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 Tuesday mornings 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 7

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 Monday, which is when the least amount of flights are scheduled (42 on average).

Question 8

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 9

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 10

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 11

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 $1,359, our data indicates the cheapest price to be $893. The most popular route (London Stansted - San Francisco), is priced around $675.

Question 12

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: KLM (85%), Air France (85%), Delta( 85%).

Question 13

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 14

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 52 days in advance to save up to 22% 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 52 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 $936, or $1,188 for flights within the next 24 hours.

Question 15

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 $698.

Question 16

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

Accepted Answer

Unlike in the afternoon, when flights are generally more expensive, you can save up to 51% on flights from London to San Francisco by exploring options for tickets in the morning.

Question 17

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 42 daily inbound flights from London from 0 different airlines.

Question 18

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 19

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 20

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 21

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 22

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 23

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 24

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	$861
Popular in	July
Cheapest in	February
Average price	$1,274
Good round-trip deal	$952 or less
Good one-way deal	$1,310 or less

Cheap flights from London to San Francisco from $861

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/9. 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 Sunday and return on a Monday

Cheap flight deals from London to San Francisco

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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 19 August 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 19 August 2025.

Cheapflights Fare Finder

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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.

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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 8 August 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 19 August 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 19 August 2025.

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

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

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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?

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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 19 August 2025.