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Cheap flights from London Heathrow Airport to San Francisco from $727

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 Heathrow Airport to San Francisco departing on 22/3. 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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Find the cheapest flights from London Heathrow Airport to San Francisco

Cheap return flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 17:40SFO-LHR
17h 00m1 stop
$868Scandinavian Airlines
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Sat, 21 Feb - Sun, 1 Mar
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 16:00SFO-LHR
15h 20m1 stop
$872Scandinavian Airlines
Find Deal
Sat, 21 Feb - Sun, 1 Mar
United Airlines Logo
12:05 - 16:30LHR-SFO
36h 25m1 stop
United Airlines Logo
17:25 - 12:00SFO-LHR
10h 35mdirect
$926United Airlines
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Tue, 2 Dec - Tue, 9 Dec
United Airlines Logo
12:05 - 16:30LHR-SFO
36h 25m1 stop
United Airlines Logo
12:50 - 07:25SFO-LHR
10h 35mdirect
$927United Airlines
Find Deal
Tue, 2 Dec - Mon, 8 Dec
Virgin Atlantic Logo
06:30 - 11:50LHR-SFO
13h 20m1 stop
Virgin Atlantic Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
$952Virgin Atlantic
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Sun, 23 Nov - Sat, 6 Dec
SWISS Logo
20:05 - 16:30LHR-SFO
28h 25m1 stop
SWISS Logo
19:25 - 17:50SFO-LHR
14h 25m1 stop
$953SWISS
Find Deal
Tue, 2 Dec - Wed, 10 Dec
Virgin Atlantic Logo
06:30 - 11:50LHR-SFO
13h 20m1 stop
Virgin Atlantic Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
$961Virgin Atlantic
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Sun, 23 Nov - Tue, 9 Dec
Delta Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Delta Logo
16:40 - 14:15SFO-LHR
13h 35m1 stop
$966Delta
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Mon, 30 Mar - Thu, 9 Apr
SWISS Logo
06:00 - 16:30LHR-SFO
18h 30m1 stop
SWISS Logo
13:00 - 16:20SFO-LHR
20h 20m2 stops
$969SWISS
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Wed, 4 Mar - Wed, 11 Mar
Delta Logo
06:30 - 11:50LHR-SFO
13h 20m1 stop
Delta Logo
00:40 - 07:05SFO-LHR
22h 25m1 stop
$970Delta
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Thu, 25 Dec - Wed, 4 Mar

United Airlines flights from London Heathrow Airport to San Francisco

Our best United Airlines deals on London Heathrow Airport to San Francisco flight tickets
United Airlines
2 Dec
LHR12:05London Heathrow
36h 25m
1 stop
SFO16:30San Francisco
9 Dec
SFO17:25San Francisco
10h 35m
LHR12:00London Heathrow
$926
Find similar
United Airlines
2 Dec
LHR12:05London Heathrow
36h 25m
1 stop
SFO16:30San Francisco
8 Dec
SFO12:50San Francisco
10h 35m
LHR07:25London Heathrow
$927
Find similar
United Airlines
8 Dec
LHR07:40London Heathrow
15h 10m
1 stop
SFO14:50San Francisco
25 Dec
SFO08:25San Francisco
14h 45m
1 stop
LHR07:10London Heathrow
$932
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Scandinavian Airlines flights from London Heathrow Airport to San Francisco

Our best Scandinavian Airlines deals on London Heathrow Airport to San Francisco flight tickets
Scandinavian Airlines
21 Feb
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
1 Mar
SFO16:40San Francisco
17h 00m
1 stop
LHR17:40London Heathrow
$868
Find similar
Scandinavian Airlines
21 Feb
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
1 Mar
SFO16:40San Francisco
15h 20m
1 stop
LHR16:00London Heathrow
$872
Find similar
Scandinavian Airlines
21 Feb
LHR15:35London Heathrow
31h 00m
2 stops
SFO14:35San Francisco
1 Mar
SFO16:40San Francisco
17h 00m
1 stop
LHR17:40London Heathrow
$874
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 4 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 21/2

06:40-14:35

1 stop15h 55m

San Francisco

Sun 1/3

16:40-17:40

1 stop17h 00m

$868

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 21/2

06:40-14:35

1 stop15h 55m

San Francisco

Sun 1/3

16:40-16:00

1 stop15h 20m

$872

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 2/12

12:05-16:30

1 stop36h 25m

San Francisco

Tue 9/12

17:25-12:00

Nonstop10h 35m

$926

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 2/12

12:05-16:30

1 stop36h 25m

San Francisco

Mon 8/12

12:50-07:25

Nonstop10h 35m

$927

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 23/11

06:30-11:50

1 stop13h 20m

San Francisco

Sat 6/12

16:30-10:40

Nonstop10h 10m

$952

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 2/12

20:05-16:30

1 stop28h 25m

San Francisco

Wed 10/12

19:25-17:50

1 stop14h 25m

$953

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 23/11

06:30-11:50

1 stop13h 20m

San Francisco

Tue 9/12

16:30-10:40

Nonstop10h 10m

$961

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 30/3

06:30-11:45

1 stop13h 15m

San Francisco

Thu 9/4

16:40-14:15

1 stop13h 35m

$966

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 4/3

06:00-16:30

1 stop18h 30m

San Francisco

Wed 11/3

13:00-16:20

2 stops20h 20m

$969

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 25/12

06:30-11:50

1 stop13h 20m

San Francisco

Wed 4/3

00:40-07:05

1 stop22h 25m

$970

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 Heathrow Airport 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 Heathrow Airport during September instead. Flights to San Francisco in September, while not as cheap as those in February, still average around $888.

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 Heathrow Airport. The lowest ticket price found for a Wednesday departure recently was $1,024. 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 Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to San Francisco for around $2,173.

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 Heathrow Airport to San Francisco in the morning for as low as $1,020. 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 at midday when prices are $2,423 on average. Flights to San Francisco from London Heathrow Airport at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest London Heathrow to San Francisco flight route?

Fly from London Heathrow to San Francisco for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $1,036 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 Heathrow Airport for as low as $960 on momondo.

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

There are 2 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to San Francisco flights?

You could potentially save up to 23% on your flight if you consider stops on a London Heathrow Airport to San Francisco flight.

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

As of November 2025, prices for London Heathrow Airport to San Francisco flights are approximately 24% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to San Francisco

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

Cheap London Heathrow Airport to San Francisco (LHR to SFO) flight deals and tips

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

Best price found

$2,179

Fastest flight time

11h 00m

Direct flights

Every day

Airports in San Francisco

1 airport
The best flight deal from London Heathrow Airport to San Francisco found on momondo in the last 72 hours is $2,179
The fastest flight from London Heathrow Airport to San Francisco takes 11h 00m
Direct flights go from London Heathrow Airport to San Francisco every day.
There is 1 airport near San Francisco: San Francisco (SFO)
Search flight deals

  • How far is London Heathrow to San Francisco by plane?

    A flight from London Heathrow to San Francisco will travel around 8596.0 km. 13h 15m is a normal flight duration for this route.

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

    Prices for flights from London Heathrow Airport to San Francisco Airport are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to San Francisco Airport.

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

    The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Travelling to a place near San Francisco?

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

Why use momondo?

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

It is quick and easy to find London to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.

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

Yes. momondo allows you to filter the results for London to San Francisco flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between London and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of London to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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