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Cheap flights from London to San Francisco from $711

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Francisco departing on 22/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

Delta Logo
06:15 - 12:50LHR-SFO
14h 35m1 stop
Delta Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
$801Delta
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Thu, 9 Oct - Fri, 6 Mar
United Airlines Logo
16:15 - 19:20LHR-SFO
11h 05mdirect
United Airlines Logo
08:25 - 06:20SFO-LHR
13h 55m1 stop
$803United Airlines
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Sat, 27 Sep - Sat, 4 Oct
United Airlines Logo
10:35 - 13:40LHR-SFO
11h 05mdirect
United Airlines Logo
13:05 - 07:25SFO-LHR
10h 20mdirect
$804United Airlines
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Fri, 3 Oct - Sat, 11 Oct
Logo
09:50 - 15:55LCY-SFO
14h 05m1 stop
Logo
18:55 - 16:40SFO-LCY
13h 45m1 stop
$810
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Mon, 16 Feb - Thu, 19 Feb
British Airways Logo
08:20 - 18:35LHR-SFO
18h 15m1 stop
British Airways Logo
21:35 - 10:20SFO-LHR
28h 45m1 stop
$812British Airways
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Sat, 27 Sep - Fri, 10 Oct
Scandinavian Airlines Logo
19:50 - 14:35LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
16:40 - 18:30SFO-LHR
17h 50m1 stop
$818Scandinavian Airlines
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Wed, 28 Jan - Mon, 9 Feb
Scandinavian Airlines Logo
19:50 - 14:35LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
$824Scandinavian Airlines
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Wed, 28 Jan - Mon, 9 Feb
KLM Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
KLM Logo
11:35 - 08:45SFO-LHR
14h 10m1 stop
$825KLM
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Wed, 8 Oct - Wed, 25 Mar
British Airways Logo
12:35 - 20:30LHR-SFO
15h 55m1 stop
British Airways Logo
17:30 - 12:00SFO-LHR
10h 30mdirect
$827British Airways
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Sun, 7 Dec - Mon, 15 Dec
Logo
06:15 - 12:50LHR-SFO
14h 35m1 stop
Logo
11:35 - 08:45SFO-LHR
14h 10m1 stop
$834
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Thu, 9 Oct - Wed, 25 Mar

United Airlines flights from London to San Francisco

Our best United Airlines deals on London to San Francisco flight tickets
United Airlines
27 Sept
LHR16:15London Heathrow
11h 05m
SFO19:20San Francisco
4 Oct
SFO08:25San Francisco
13h 55m
1 stop
LHR06:20London Heathrow
$803
Find similar
United Airlines
3 Oct
LHR10:35London Heathrow
11h 05m
SFO13:40San Francisco
11 Oct
SFO13:05San Francisco
10h 20m
LHR07:25London Heathrow
$804
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United Airlines
21 Feb
LHR10:05London Heathrow
11h 15m
SFO13:20San Francisco
1 Mar
SFO17:25San Francisco
10h 35m
LHR12:00London Heathrow
$806
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British Airways flights from London to San Francisco

Our best British Airways deals on London to San Francisco flight tickets
British Airways
27 Sept
LHR08:20London Heathrow
18h 15m
1 stop
SFO18:35San Francisco
10 Oct
SFO21:35San Francisco
28h 45m
1 stop
LHR10:20London Heathrow
$812
Find similar
British Airways
20 Sept
LHR16:55London Heathrow
14h 21m
1 stop
SFO23:16San Francisco
4 Oct
SFO10:14San Francisco
13h 06m
1 stop
LHR07:20London Heathrow
$813
Find similar
British Airways
7 Dec
LHR12:35London Heathrow
15h 55m
1 stop
SFO20:30San Francisco
15 Dec
SFO17:30San Francisco
10h 30m
LHR12:00London Heathrow
$827
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momondo Fare Finder

 
Customise your flight search to find flights from London to San Francisco 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, momondo users made 78,305 searches. Data last updated 14 September 2025.
Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 9/10

06:15-12:50

1 stop14h 35m

San Francisco

Fri 6/3

16:30-10:40

Nonstop10h 10m

$801

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 27/9

16:15-19:20

Nonstop11h 05m

San Francisco

Sat 4/10

08:25-06:20

1 stop13h 55m

$803

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 3/10

10:35-13:40

Nonstop11h 05m

San Francisco

Sat 11/10

13:05-07:25

Nonstop10h 20m

$804

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Mon 16/2

09:50-15:55

1 stop14h 05m

San Francisco

Thu 19/2

18:55-16:40

1 stop13h 45m

$810

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 27/9

08:20-18:35

1 stop18h 15m

San Francisco

Fri 10/10

21:35-10:20

1 stop28h 45m

$812

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 28/1

19:50-14:35

2 stops26h 45m

San Francisco

Mon 9/2

16:40-18:30

1 stop17h 50m

$818

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 28/1

19:50-14:35

2 stops26h 45m

San Francisco

Mon 9/2

16:40-18:50

2 stops18h 10m

$824

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/10

06:30-11:45

1 stop13h 15m

San Francisco

Wed 25/3

11:35-08:45

1 stop14h 10m

$825

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 7/12

12:35-20:30

1 stop15h 55m

San Francisco

Mon 15/12

17:30-12:00

Nonstop10h 30m

$827

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 9/10

06:15-12:50

1 stop14h 35m

San Francisco

Wed 25/3

11:35-08:45

1 stop14h 10m

$834

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from London to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel during the month of February, then book flights to San Francisco from London during November instead. Flights to San Francisco in November, while not as cheap as those in February, still average around $885.

What is the cheapest day to depart on your flight to San Francisco?

According to our data, Wednesday is the cheapest day to fly to San Francisco from London. The lowest ticket price found for a Wednesday departure recently was $1,008. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from London to San Francisco for around $2,185.

What is the cheapest time of day to depart on your flight to San Francisco?

According to our data, the cheapest time of day to fly to San Francisco is in the morning. momondo users have found flights departing from London to San Francisco in the morning for as low as $1,003. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $2,063 on average. Flights to San Francisco from London in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest London to San Francisco flight route?

Fly from London Heathrow to San Francisco for the best London - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $1,005 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from London for as low as $930 on momondo.

What cabin class options are available on London to San Francisco flights?

There are 2 cabin classes available to choose from on London to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to San Francisco flights?

You could potentially save up to 48% on your flight if you consider stops on a London to San Francisco flight.

How have London to San Francisco flight prices changed over time?

As of September 2025, prices for London to San Francisco flights are approximately 59% more expensive when compared to flights at the same time last year.

When to book flights from London to San Francisco

Are you open to changing your travel dates? Check out the ideal times to fly from London to San Francisco according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to San Francisco (LON to SFO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to San Francisco

Best price found

$881

Fastest flight time

11h 00m

Direct flights

Every day

Airports in San Francisco

1 airport
The best flight deal from London to San Francisco found on momondo in the last 72 hours is $881
The fastest flight from London to San Francisco takes 11h 00m
Direct flights go from London to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)
Search flight deals

  • How far is London to San Francisco by plane?

    The straight-line distance from London to San Francisco is 8609.4 km. Typically, this will take 11h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from London to San Francisco Airport?

    Prices for flights from London to San Francisco Airport refresh daily.

  • How old do you have to be to fly from London to San Francisco Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London to San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The travel and health documents required for your trip to San Francisco Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London to San Francisco?

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Walnut Creek
Carmel-by-the-Sea
Redwood City
Sausalito
Watsonville
Emeryville
San Mateo
Pacifica
Mountain View
Burlingame
Salinas
Pacific Grove
Pebble Beach
San Lorenzo

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from London.

Can I find flights from London to San Francisco with flexible booking policies on momondo?

Yes. All flights to San Francisco from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to San Francisco?

Once you have performed a search for London to San Francisco flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

Price alerts on flights to San Francisco from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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