Find flights
Deals
When to book
FAQs

Cheap flights from San Francisco to London from $556

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LON
20 Feb — 27 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to London are usually found in September or January, booked 38 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from San Francisco to London

Enter your travel dates to find the best prices.

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 21 January 2026.

Tue 24/217:30
SFO
-
LHR
Nonstop10h 30m
British Airways
Mon 9/315:20
LHR
-
SFO
1 stop32h 15m
British Airways
Deal found 20/1$884
Wed 11/214:36
SFO
-
LHR
1 stop13h 39m
British Airways
Tue 24/211:45
LHR
-
SFO
Nonstop11h 15m
British Airways
Deal found 20/1$885
Sat 7/216:40
SFO
-
LHR
2 stops19h 15m
Scandinavian Airlines
Sun 15/221:05
LHR
-
SFO
2 stops25h 30m
Scandinavian Airlines
Deal found 20/1$887
Mon 26/107:00
SFO
-
LHR
1 stop15h 50m
British Airways
Fri 13/211:45
LHR
-
SFO
Nonstop11h 15m
British Airways
Deal found 19/1$888
Sat 21/321:40
SFO
-
LHR
Nonstop10h 30m
British Airways
Mon 30/321:10
LHR
-
SFO
1 stop26h 40m
British Airways
Deal found 20/1$891
Fri 13/313:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Thu 19/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Deal found 20/1$893
Mon 23/315:57
SFO
-
LHR
1 stop14h 33m
United Airlines
Thu 2/406:55
LHR
-
SFO
1 stop15h 40m
United Airlines
Deal found 19/1$894
Mon 19/116:35
SFO
-
LHR
1 stop21h 00m
TAP AIR PORTUGAL
Thu 29/116:30
LHR
-
SFO
1 stop31h 35m
TAP AIR PORTUGAL
Deal found 19/1$896
Tue 21/416:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Thu 30/408:50
LHR
-
SFO
1 stop15h 00m
British Airways
Deal found 20/1$899
Wed 8/412:55
SFO
-
LHR
Nonstop10h 30m
United Airlines
Thu 23/407:25
LHR
-
SFO
1 stop15h 10m
United Airlines
Deal found 20/1$900
Tue 21/419:30
SFO
-
LHR
Nonstop10h 40m
United Airlines
Mon 11/516:25
LHR
-
SFO
1 stop30h 10m
United Airlines
Deal found 20/1$902
Sun 12/411:20
SFO
-
LHR
1 stop18h 00m
United Airlines
Mon 27/416:25
LHR
-
SFO
1 stop30h 10m
United Airlines
Deal found 19/1$903

Find flight deals from San Francisco to London

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2026.

Round-trip from

$884

One-way from

$556

Popular in

June

Cheapest in

September

Average price

$979
British Airways
  • British Airways
  • 24/2-5/3
  • 1 total stop
  • 37h 20m total
  • San Francisco to London
Search Deals
JetBlue
  • JetBlue
  • 24/3
  • 1 total stop
  • 19h 29m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($339 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($61 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 21 January 2026.
Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

San Francisco

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 31/1

22:30-06:20

1 stop23h 50m

London Heathrow

Fri 13/2

11:45-15:00

Nonstop11h 15m

$888

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 10/3

21:40-15:10

Nonstop10h 30m

London Heathrow

Thu 26/3

08:20-23:16

1 stop21h 56m

$896

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 16/3

18:30-12:00

Nonstop10h 30m

London Heathrow

Wed 25/3

17:00-23:57

1 stop37h 57m

$905

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 1/4

16:35-11:00

Nonstop10h 25m

London Heathrow

Thu 9/4

10:45-13:50

Nonstop11h 05m

$906

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 1/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Wed 11/2

09:00-16:30

1 stop15h 30m

$914

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sat 28/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Sat 7/3

06:35-14:50

1 stop16h 15m

$914

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 25/2

13:20-11:50

1 stop14h 30m

London Heathrow

Thu 5/3

11:10-19:35

1 stop16h 25m

$914

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 1/2

12:50-07:25

Nonstop10h 35m

London Heathrow

Thu 12/2

09:00-16:30

1 stop15h 30m

$914

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 22/2

17:25-12:00

Nonstop10h 35m

London Heathrow

Mon 2/3

13:45-17:00

Nonstop11h 15m

$918

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 19/5

19:40-20:05

1 stop16h 25m

London Heathrow

Wed 27/5

20:50-17:55

1 stop29h 05m

$925

Flights are sorted by cheapest return flights first.

Deals found on 20/1

Showing 1-10 of 24 results
1
2
3

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.
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

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 16 January 2026.

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.

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

Currently, October is the cheapest month in which you can book a flight from San Francisco to London (average of $738). Flying from San Francisco to London in June is currently the most expensive (average of $1,199). 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?

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 21 January 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 20% versus a flight in the afternoon.

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 21 January 2026.

The most flights from SFO to LON are scheduled on a Monday (31 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (25 on average).

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 153 minutes.

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

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon 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 Wednesday 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, Virgin Atlantic have had the lowest number of delays on this route, with just 8% of flights being delayed.

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?

    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 28 daily outbound flights to London from 0 different airlines.

  • How long is the flight from San Francisco to London?

    British Airways and United Airlines can get you from San Francisco to London in just under 10h 35m. Your travel time can differ by up to 13h 15m. 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 American Airlines (82%), Aer Lingus (82%) or Alaska Airlines (82%) 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, October is the cheapest month in which you can book a flight from San Francisco to London (average of $738). Flying from San Francisco to London in June is currently the most expensive (average of $1,199). 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.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Kingston upon Thames
Hounslow
Horsham
Southall
Chatham
Dover
Braintree
Gatwick
Chertsey

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to London

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.