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Cheap flights from San Francisco to London from $577

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 13/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LON
22 May — 29 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to London are usually found in February or January, booked 57 days in advance, depart on a Monday or Tuesday 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 22 April 2026.

Wed 9/916:45
SFO
-
LHR
1 stop32h 35m
Scandinavian Airlines
Sat 12/906:40
LHR
-
SFO
2 stops40h 00m
Scandinavian Airlines
Deal found 20/4$1,000
Mon 11/516:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Thu 14/506:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 18/4$1,032
Sun 10/516:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Wed 13/515:35
LHR
-
SFO
2 stops31h 05m
Scandinavian Airlines
Deal found 18/4$1,038
Sun 22/1116:40
SFO
-
LHR
2 stops32h 15m
Scandinavian Airlines
Wed 25/1106:40
LHR
-
SFO
1 stop15h 55m
Scandinavian Airlines
Deal found 22/4$1,070
Sun 10/516:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Thu 21/506:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 19/4$1,074
Mon 7/916:45
SFO
-
LHR
1 stop17h 45m
Scandinavian Airlines
Wed 16/919:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 19/4$1,078
Mon 11/516:45
SFO
-
LHR
2 stops32h 50m
Scandinavian Airlines
Sat 16/506:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 18/4$1,079
Tue 6/1016:45
SFO
-
LHR
2 stops18h 05m
Scandinavian Airlines
Sun 18/1019:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Deal found 21/4$1,082
Tue 3/1116:40
SFO
-
LHR
1 stop15h 20m
Scandinavian Airlines
Fri 20/1106:40
LHR
-
SFO
1 stop15h 55m
Scandinavian Airlines
Deal found 21/4$1,088
Mon 7/916:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Fri 11/906:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 20/4$1,089
Mon 23/1120:59
SFO
-
LHR
2 stops36h 41m
Scandinavian Airlines
Thu 26/1109:55
LHR
-
SFO
2 stops36h 40m
Scandinavian Airlines
Deal found 22/4$1,092

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 22 April 2026.

Round-trip from

$1,000

One-way from

$577

Popular in

June

Cheapest in

February

Average price

$1,018

Good one-way deal

$695 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 9/9-12/9
  • 3 total stops
  • 72h 35m total
  • San Francisco to London
Search Deals
13/8
  • 13/8
  • 1 total stop
  • 14h 10m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($358 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($59 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a one-way flight from San Francisco to London (LON).
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 22 April 2026.
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 - LHR

SFOLHR

San Francisco

Mon 11/5

17:55-12:15

Nonstop10h 20m

London Heathrow

Tue 19/5

06:30-11:45

1 stop13h 15m

$1,191

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 11/5

23:15-17:30

Nonstop10h 15m

London Heathrow

Thu 21/5

06:30-11:45

1 stop13h 15m

$1,191

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 6/10

13:00-07:25

Nonstop10h 25m

London Heathrow

Thu 15/10

08:45-16:15

1 stop15h 30m

$1,191

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 27/7

16:50-11:10

Nonstop10h 20m

London Heathrow

Mon 24/8

10:50-14:20

1 stop35h 30m

$1,205

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 6/5

23:15-17:30

Nonstop10h 15m

London Heathrow

Mon 18/5

06:30-11:45

1 stop13h 15m

$1,233

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 2/9

08:10-06:30

1 stop14h 20m

London Heathrow

Mon 7/9

06:55-14:20

1 stop15h 25m

$1,237

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 1/9

17:55-12:15

Nonstop10h 20m

London Heathrow

Sun 13/9

06:15-12:50

1 stop14h 35m

$1,243

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 11/5

19:30-14:10

Nonstop10h 40m

London Heathrow

Sun 24/5

07:25-14:20

1 stop14h 55m

$1,322

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 12/5

12:50-07:25

Nonstop10h 35m

London Heathrow

Sun 31/5

07:30-19:50

1 stop20h 20m

$1,339

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Thu 21/5

11:45-09:35

1 stop13h 50m

London Heathrow

Thu 11/6

13:00-16:05

Nonstop11h 05m

$1,420

Flights are sorted by cheapest return flights first.

Deals found on 19/4

Showing 1-10 of 24 resultsSorted by cheapest first
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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.
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 17 April 2026.

The best time to book flights from San Francisco to London is 57 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, November is the cheapest month in which you can book a flight from San Francisco to London (average of $885). Flying from San Francisco to London in June is currently the most expensive (average of $1,593). 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 22 April 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

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 22 April 2026.

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

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

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 155 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 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.

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 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 42 daily outbound flights to London from 0 different airlines.

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

    KLM, Delta, and United Airlines can get you from San Francisco to London in just under 10h 20m. Your travel time will be generally consistent. Airlines will cover a distance of 8610 km. Most flights are nonstop.

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

    Consider American Airlines (91%), Alaska Airlines (91%) or British Airways (91%) 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 $696, our data indicates the cheapest price to be $621. The most popular route (San Francisco - London Heathrow), is priced around $1,521.

  • 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, November is the cheapest month in which you can book a flight from San Francisco to London (average of $885). Flying from San Francisco to London in June is currently the most expensive (average of $1,593). 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
Hounslow
Kingston upon Thames
Horsham
Chatham
Aylesbury
Dover
Luton
Braintree
Gatwick
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Alternative routes for San Francisco to London

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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.

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