Question 1

How long is the flight from San Francisco to London?

Accepted Answer

Scandinavian Airlines can get you from San Francisco to London in just under 18h 10m. Your travel time can differ by up to . Airlines will cover a distance of 8610 km. Find deals

Question 2

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

Accepted Answer

The best time to book flights from San Francisco to London is 38 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 3

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

Accepted Answer

Currently, October is the cheapest month in which you can book a flight from San Francisco to London (average of $1,037). Flying from San Francisco to London in December is currently the most expensive (average of $1,667). 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 4

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

Accepted Answer

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

Question 5

Weekly flight availability from San Francisco to London

Accepted Answer

The most flights from SFO to LON are scheduled on a Wednesday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (22 on average).

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July 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 4.0 C).

Question 8

What are the cheapest flights from San Francisco to London?

Accepted Answer

Looking for the cheapest flight from San Francisco to London? While on average our users pay $614, our data indicates the cheapest price to be $545. The most popular route (San Francisco - London Heathrow), is priced around $678.

Question 9

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

Accepted Answer

Consider Iberia (90%), Aeromexico (88%) or American Airlines (87%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London.

Question 10

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

Accepted Answer

Flying to your destination on a Thursday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to London. Check prices with Cheapflights to find a great deal for your trip.

Question 11

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

Accepted Answer

To save up to 15% on this flight, we recommend booking at least 39 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from San Francisco to London from $1,070 1-2 weeks out and tickets from $1,260 for flights departing within the next 72 hours.

Question 12

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

Accepted Answer

The best pricing can be found in the month of October. Prices to London from San Francisco average $1,154. You can even find prices in October for less than $1,154, as users have found deals to London from as low as $791. The month of June appears to be one of the more expensive times to travel to London from San Francisco. Flying in the targeted month can save you up to 37%.

Question 13

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

Accepted Answer

When flying from San Francisco to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 13% versus a flight at midday.

Question 14

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

Accepted Answer

Located just 19.0 km from the city centre, San Francisco is the airport most travellers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 36 daily outbound flights to London from 0 different airlines.

Question 15

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

Accepted Answer

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

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

Yes. Cheapflights offers flight deals from San Francisco to London 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 18

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

Accepted Answer

Deals for San Francisco to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 19

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

Accepted Answer

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from San Francisco to London.

Question 20

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

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to London flexibly with Cheapflights today.

Question 21

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

Accepted Answer

Yes, Cheapflights offers price alerts on San Francisco to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

Round-trip from	$794
One-way from	$494
Popular in	June
Cheapest in	October
Average price	$1,099
Good one-way deal	$614 or less

Cheap flights from San Francisco to London from $494

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from San Francisco to London are usually found in October or September, booked 38 days in advance, depart on a Monday or Tuesday and return on a Wednesday

Cheap flight deals from San Francisco to London

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Find flight deals from San Francisco to London

Cheapest flights from San Francisco to LondonExplore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.

Cheapflights Fare Finder

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

Best time to book a flight from San Francisco to London

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from San Francisco to London. Price data was last updated on 22 August 2025.

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

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

Find hourly flight availability from San Francisco to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 August 2025.

Weekly flight availability from San Francisco to London

Explore weekly flight availability from San Francisco to London. 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 29 August 2025.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to London. 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 from for flights from San Francisco to London?

How long is the flight from San Francisco to London?

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

What are the cheapest flights from San Francisco to London?

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

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

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

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

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

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

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

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

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Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 August 2025.