How long is the flight from San Francisco to London?

Delta, Alaska Airlines, and United Airlines can get you from San Francisco to London in just under 10h 35m. Your travel time can differ by up to 3h 33m. 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 most reliable airlines from San Francisco to London?

Consider Air Canada (86%), Austrian Airlines (86%) or United Airlines (86%) 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 38 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.

$556+ 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 87 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from San Francisco to London

Enter your travel dates to find the best prices.

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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 15 September 2026.

Tue 8/1216:40 -

Nonstop10h 15m

Fri 8/109:05 -

1 stop18h 29m

Deal found 14/9$1,072

Sun 6/1216:40 -

Nonstop10h 15m

Thu 7/110:10 -

1 stop17h 24m

Deal found 14/9$1,073

Tue 15/1214:00 -

1 stop13h 20m

Wed 23/1216:40 -

1 stop34h 55m

Deal found 14/9$1,074

Thu 24/912:28 -

1 stop13h 42m

Mon 28/912:10 -

1 stop36h 05m

Deal found 15/9$1,076

Fri 16/1012:55 -

Nonstop10h 30m

Tue 27/1006:35 -

1 stop16h 15m

Deal found 15/9$1,077

Sun 13/1217:25 -

Nonstop10h 25m

Tue 16/311:45 -

Nonstop11h 10m

Deal found 14/9$1,079

Sat 12/1223:59 -

1 stop22h 26m

Mon 18/117:35 -

1 stop27h 20m

Deal found 14/9$1,081

Fri 2/1012:28 -

1 stop13h 42m

Thu 8/1006:55 -

1 stop15h 35m

Deal found 14/9$1,083

Thu 1/1021:35 -

1 stop28h 35m

Tue 6/1015:05 -

1 stop29h 06m

Deal found 15/9$1,084

Thu 5/1116:40 -

Nonstop10h 15m

Wed 11/1106:30 -

1 stop13h 15m

Deal found 14/9$1,086

Sun 6/1216:40 -

Nonstop10h 15m

Tue 12/106:30 -

1 stop13h 15m

Deal found 14/9$1,087

Wed 4/1116:40 -

Nonstop10h 15m

Tue 24/1106:30 -

1 stop13h 15m

Deal found 14/9$1,090

Find flight deals from San Francisco to London

Round-trip from	$1,013
One-way from	$556
Popular in	June
Cheapest in	February
Average price	$1,272

United Airlines
13/1-27/1
1 total stop
26h 05m total
San Francisco to London

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SWISS
27/12-31/12
2 total stops
18h 00m total
San Francisco to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price ($384 potential increase over avg. return price).

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Cheapest flight prices on average. 3% potential price decrease ($67 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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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

Fri 13/11

09:43-15:40

2 stops21h 57m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$558

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Wed 23/12

16:55-11:50

1 stop34h 55m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$581

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Wed 16/12

14:00-11:20

1 stop13h 20m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$598

Fastest return journey

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Wed 11/11

16:40-10:55

Nonstop10h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$643

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Mon 12/10

17:55-12:15

Nonstop10h 20m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$643

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 11/10

12:55-07:25

Nonstop10h 30m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$643

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Sun 15/11

16:40-11:15

Nonstop10h 35m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$643

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 22/12

19:29-12:20

1 stop32h 51m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

$675

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Tue 29/12

08:15-05:55

1 stop13h 40m

London Heathrow

Thu 14/1

13:45-16:55

Nonstop11h 10m

$1,128

San FranciscoLondon

SFO San Francisco - LHR London Heathrow

SFOLHR

San Francisco

Fri 23/10

16:45-11:10

Nonstop10h 25m

London Heathrow

Sun 1/11

11:10-19:35

1 stop16h 25m

$1,147

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 20 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 $912). Flying from San Francisco to London in June is currently the most expensive (average of $1,797). 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 48% versus a flight in the morning.

Weekly flight availability from San Francisco to London

The most flights from SFO to LON are scheduled on a Monday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).

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 $976 and $1,518 in January.
The cheapest return price found within the last 5 days was $1,013 on United Airlines (13 Jan–27 Jan).

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 157 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 8% 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 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.

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 38 daily outbound flights to London from 0 different airlines.
How long is the flight from San Francisco to London?
Delta, Alaska Airlines, and United Airlines can get you from San Francisco to London in just under 10h 35m. Your travel time can differ by up to 3h 33m. 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 Air Canada (86%), Austrian Airlines (86%) or United Airlines (86%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London.
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 $912). Flying from San Francisco to London in June is currently the most expensive (average of $1,797). 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 $556

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/12. 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 15 September 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 15 September 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 15 September 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 15 September 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 15 September 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 15 September 2026.

Last-minute flights from San Francisco to LondonDiscover last-minute flight deals from San Francisco to London. Data last updated 15 September 2026 and is based on user searches.

Discover last-minute flight deals from San Francisco to London. Data last updated 15 September 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 15 September 2026.

Search for one-way flight options from San Francisco to London. Find affordable one-way fares based on user searches. Data last updated 15 September 2026.

Find flight deals from San Francisco to London

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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 15 September 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 48% versus a flight in the morning.

Weekly flight availability from San Francisco to London

The most flights from SFO to LON are scheduled on a Monday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).

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 $976 and $1,518 in January.The cheapest return price found within the last 5 days was $1,013 on United Airlines (13 Jan–27 Jan).

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 157 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 8% 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 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.

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?

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 15 September 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 15 September 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 15 September 2026.

Last-minute flights from San Francisco to London
Discover last-minute flight deals from San Francisco to London. Data last updated 15 September 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 15 September 2026.

San Francisco to London flights typically cost between $976 and $1,518 in January.
The cheapest return price found within the last 5 days was $1,013 on United Airlines (13 Jan–27 Jan).