How long is the flight from San Francisco to London?

United Airlines and Scandinavian Airlines can get you from San Francisco to London in just under 15h 15m. Your travel time can differ by up to 19h 20m. 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.

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.

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).

What are the cheapest flights from San Francisco to London?

Looking for the cheapest flight from San Francisco to London? While on average our users pay $763, our data indicates the cheapest price to be $691. The most popular route (San Francisco - London Heathrow), is priced around $2,449.

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

Consider KLM (82%), SAUDIA (82%) or Air France (82%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London.

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

Located just 17.7 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 17 daily outbound flights to London from 0 different airlines.

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

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

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

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.

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

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.

$524+ Cheap Flights from San Francisco to London

Cheapflights Tip: The best prices from San Francisco to London are usually found in February or January, booked 69 days in advance, depart on a Monday or Wednesday and return on a Monday

Cheap flight deals from San Francisco to London

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One-way

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 30 October 2026.

Sat 28/1116:45 -

2 stops44h 35m

Tue 1/1219:30 -

1 stop27h 20m

Deal found 27/10$1,047

Mon 16/1116:45 -

2 stops39h 40m

Thu 19/1113:55 -

2 stops32h 55m

Deal found 25/10$1,053

Wed 9/1216:45 -

2 stops56h 50m

Sun 13/1206:40 -

1 stop16h 10m

Deal found 25/10$1,063

Fri 4/1216:45 -

2 stops32h 10m

Mon 7/1206:40 -

1 stop16h 10m

Deal found 26/10$1,071

Fri 11/1216:45 -

1 stop15h 15m

Fri 18/1206:40 -

1 stop16h 10m

Deal found 27/10$1,090

Thu 26/1116:45 -

2 stops61h 50m

Mon 30/1110:20 -

1 stop36h 30m

Deal found 25/10$1,105

Fri 27/1116:45 -

2 stops32h 10m

Thu 10/1206:40 -

1 stop16h 10m

Deal found 30/10$1,108

Fri 27/1116:45 -

2 stops32h 10m

Fri 4/1218:40 -

1 stop28h 10m

Deal found 29/10$1,110

Fri 27/1116:45 -

2 stops32h 10m

Sun 13/1206:40 -

1 stop16h 10m

Deal found 27/10$1,111

Find flight deals from San Francisco to London

Round-trip from	$1,047
One-way from	$524
Popular in	June
Cheapest in	February
Average price	$1,335
Good one-way deal	$740 or less

United Airlines
17/2-19/2
1 total stop
26h 05m total
San Francisco to London

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JetBlue
13/12-31/12
1 total stop
15h 25m total
San Francisco to London

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Highest demand for flights based on searches. 17% potential increase in price ($373 potential increase over avg. return price).

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Cheapest flight prices on average. 3% potential price decrease ($66 potential savings vs. average return price).

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Average for round-trip flights in October 2026

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Price to beat on a one-way flight from San Francisco to London (LON).

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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Wed 17/2

06:30-09:20

2 stops18h 50m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$639

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 13/12

09:58-15:40

2 stops21h 42m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$698

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Mon 14/12

23:32-21:40

1 stop14h 08m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$719

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 29/12

16:40-11:15

Nonstop10h 35m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$830

Fastest return journey

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Wed 30/12

16:40-10:55

Nonstop10h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$830

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 17/1

16:40-10:55

Nonstop10h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$830

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 24/11

16:40-11:15

Nonstop10h 35m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$830

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 1/12

16:40-11:15

Nonstop10h 35m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$830

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sat 28/11

16:40-10:55

Nonstop10h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$894

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 8/11

16:40-10:55

Nonstop10h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$894

Flights are sorted by cheapest return flights first.

Deals found on 28/10

Showing 1-10 of 23 resultsSorted by cheapest first

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.

SFO-LON

SFO-LHR

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

SFO-LON

SFO-LHR

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

Currently, February is the cheapest month in which you can book a flight from San Francisco to London (average of $925). Flying from San Francisco to London in June is currently the most expensive (average of $1,834). 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 time of day to fly from SFO to LON?

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 43% versus a flight in the morning.

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

Airfare is typical for this route at the moment.

San Francisco to London flights typically cost between $973 and $1,441 in February.
The cheapest return price found within the last 5 days was $1,047 on United Airlines (14 Feb–16 Feb).

How often are flights from San Francisco to London delayed?

About 11% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 152 minutes.

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

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

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

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.

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

Over the past year, British Airways have had the lowest number of delays on this route, with just 9% of flights being delayed.

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

The best time to book flights from San Francisco to London is 68 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.

Related info for your journey

What airport do you fly from for flights from San Francisco to London?
Located just 17.7 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 17 daily outbound flights to London from 0 different airlines.
How long is the flight from San Francisco to London?
United Airlines and Scandinavian Airlines can get you from San Francisco to London in just under 15h 15m. Your travel time can differ by up to 19h 20m. 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.
What are the most reliable airlines from San Francisco to London?
Consider KLM (82%), SAUDIA (82%) or Air France (82%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London.
What are the cheapest flights from San Francisco to London?
Looking for the cheapest flight from San Francisco to London? While on average our users pay $763, our data indicates the cheapest price to be $691. The most popular route (San Francisco - London Heathrow), is priced around $2,449.
Can I find deals for flights from San Francisco to London that include hotel bookings?
Yes. In addition to deals on San Francisco to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from San Francisco to London?
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.
Can I find deals for business class flights from San Francisco to London?
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.
What is the cheapest month to book a flight from San Francisco to London?
Currently, February is the cheapest month in which you can book a flight from San Francisco to London (average of $925). Flying from San Francisco to London in June is currently the most expensive (average of $1,834). 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.

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

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.

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

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.

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

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

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

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.

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Cheap flights from San Francisco to London from $524

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/12. Fares are subject to change and may not be available on all flights or dates of travel.

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 30 October 2026.

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 30 October 2026.

Best flights from San Francisco to LondonDiscover carefully curated flight deals from San Francisco to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Discover carefully curated flight deals from San Francisco to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Direct flights from San Francisco to LondonExplore direct flight options from San Francisco to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 October 2026.

Explore direct flight options from San Francisco to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 October 2026.

Last-minute flights from San Francisco to LondonDiscover last-minute flight deals from San Francisco to London. Data last updated 30 October 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to London. Data last updated 30 October 2026 and is based on user searches.

One-way flights from San Francisco to LondonSearch for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Search for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

Find flight deals from San Francisco to London

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One-way from

Popular in

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Good one-way deal

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

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 30 October 2026.

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 43% versus a flight in the morning.

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

Airfare is typical for this route at the moment.

San Francisco to London flights typically cost between $973 and $1,441 in February.The cheapest return price found within the last 5 days was $1,047 on United Airlines (14 Feb–16 Feb).

How often are flights from San Francisco to London delayed?

About 11% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 152 minutes.

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

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

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

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.

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

Over the past year, British Airways have had the lowest number of delays on this route, with just 9% of flights being delayed.

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

The best time to book flights from San Francisco to London is 68 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.

Related info for your journey

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 30 October 2026.

Best flights from San Francisco to London
Discover carefully curated flight deals from San Francisco to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2026.

Direct flights from San Francisco to London
Explore direct flight options from San Francisco to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 30 October 2026.

Last-minute flights from San Francisco to London
Discover last-minute flight deals from San Francisco to London. Data last updated 30 October 2026 and is based on user searches.

One-way flights from San Francisco to London
Search for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2026.

San Francisco to London flights typically cost between $973 and $1,441 in February.
The cheapest return price found within the last 5 days was $1,047 on United Airlines (14 Feb–16 Feb).