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

Airfare is below average for this route at the moment. San Francisco to London flights typically cost between $1,010 and $1,839 in December. The cheapest return flight price found within the last 3 days was $895 on Delta (30 Dec-9 Jan). Find deals

Question 1

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

Accepted Answer

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 9% of flights being delayed. Find deals

Question 2

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

Accepted Answer

Airfare is below average for this route at the moment.San Francisco to London flights typically cost between $1,010 and $1,839 in December.
The cheapest return flight price found within the last 3 days was $895 on Delta (30 Dec-9 Jan). Find deals

Question 3

What is the most punctual flight time for San Francisco to London flights?

Accepted Answer

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often. Find deals

Question 4

How often are flights from San Francisco to London delayed?

Accepted Answer

About 12% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 157 minutes. Find deals

Question 5

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

Accepted Answer

Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Question 6

How long is the flight from San Francisco to London?

Accepted Answer

Scandinavian Airlines, Delta, and United Airlines can get you from San Francisco to London in just under 10h 20m. Your travel time can differ by up to 4h 55m. Airlines will cover a distance of 8610 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

Question 7

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 88 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.

Question 8

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

Accepted Answer

Currently, December is the cheapest month in which you can book a flight from San Francisco to London (average of $696). Flying from San Francisco to London in June is currently the most expensive (average of $1,220). 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 9

Weekly flight availability from San Francisco to London

Accepted Answer

The most flights from SFO to LON are scheduled on a Tuesday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (26 on average).

Question 10

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 11

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 12

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 $1,946, our data indicates the cheapest price to be $991. The most popular route (San Francisco - London Heathrow), is priced around $891.

Question 13

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

Accepted Answer

Consider American Airlines (90%), Aer Lingus (90%) or Alaska Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London.

Question 14

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 at midday, which can drop the price by up to 19% versus a flight in the afternoon.

Question 15

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 30 daily outbound flights to London from 0 different airlines.

Question 16

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 17

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 18

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 19

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 20

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 21

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 22

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	$895
One-way from	$581
Popular in	June
Cheapest in	September
Average price	$1,326
Good round-trip deal	$1,860 or less

Cheap flights from San Francisco to London from $581

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 10/12. 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 September or October, booked 88 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap 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 5 December 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 5 December 2025.

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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.

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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 28 November 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 5 December 2025.

Weekly flight availability from San Francisco to London

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

How often are flights from San Francisco to London delayed?

What is the most punctual flight time for San Francisco to London flights?

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

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

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 5 December 2025.