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Cheap flights from London Heathrow Airport to San Francisco from €478

This is the cheapest return 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 23/11. 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

Scandinavian Airlines Logo
19:30 - 14:35LHR-SFO
27h 05m1 stop
Scandinavian Airlines Logo
16:40 - 19:55SFO-LHR
19h 15m2 stops
€478Scandinavian Airlines
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Sun, 23 Nov - Sun, 30 Nov
United Airlines Logo
08:40 - 16:10LHR-SFO
15h 30m1 stop
United Airlines Logo
00:43 - 07:40SFO-LHR
22h 57m1 stop
€479United Airlines
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Fri, 5 Sep - Fri, 19 Sep
Logo
09:30 - 16:00LHR-SFO
14h 30m1 stop
Logo
12:50 - 07:25SFO-LHR
10h 35mdirect
€483
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Wed, 24 Sep - Thu, 4 Dec
Virgin Atlantic Logo
11:15 - 14:15LHR-SFO
11h 00mdirect
Virgin Atlantic Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
€492Virgin Atlantic
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Thu, 11 Sep - Wed, 24 Sep
Virgin Atlantic Logo
16:25 - 19:30LHR-SFO
11h 05mdirect
Virgin Atlantic Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
€493Virgin Atlantic
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Thu, 11 Sep - Wed, 24 Sep
British Airways Logo
10:45 - 13:50LHR-SFO
11h 05mdirect
British Airways Logo
10:16 - 07:20SFO-LHR
13h 04m1 stop
€497British Airways
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Fri, 26 Sep - Sat, 11 Oct
British Airways Logo
11:45 - 15:00LHR-SFO
11h 15mdirect
British Airways Logo
16:26 - 13:15SFO-LHR
12h 49m1 stop
€498British Airways
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Wed, 11 Feb - Wed, 25 Feb
Lufthansa Logo
06:30 - 12:40LHR-SFO
14h 10m1 stop
Lufthansa Logo
13:55 - 11:45SFO-LHR
13h 50m1 stop
€501Lufthansa
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Thu, 11 Sep - Fri, 19 Sep
Logo
10:35 - 13:40LHR-SFO
11h 05mdirect
Logo
16:05 - 10:25SFO-LHR
10h 20mdirect
€507
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Sun, 7 Sep - Sun, 14 Sep
Lufthansa Logo
10:35 - 13:40LHR-SFO
11h 05mdirect
Lufthansa Logo
13:05 - 07:25SFO-LHR
10h 20mdirect
€508Lufthansa
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Thu, 11 Sep - Wed, 17 Sep

Virgin Atlantic flights from London Heathrow Airport to San Francisco

Our best Virgin Atlantic deals on London Heathrow Airport to San Francisco flight tickets
Virgin Atlantic
31 Aug
LHR06:30London Heathrow
13h 15m
1 stop
SFO11:45San Francisco
13 Sept
SFO16:05San Francisco
10h 20m
LHR10:25London Heathrow
€486
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Virgin Atlantic
31 Aug
LHR06:30London Heathrow
13h 15m
1 stop
SFO11:45San Francisco
13 Sept
SFO07:05San Francisco
15h 40m
1 stop
LHR06:45London Heathrow
€489
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Virgin Atlantic
11 Sept
LHR11:15London Heathrow
11h 00m
SFO14:15San Francisco
24 Sept
SFO16:05San Francisco
10h 20m
LHR10:25London Heathrow
€492
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British Airways flights from London Heathrow Airport to San Francisco

Our best British Airways deals on London Heathrow Airport to San Francisco flight tickets
British Airways
26 Sept
LHR10:45London Heathrow
11h 05m
SFO13:50San Francisco
11 Oct
SFO10:16San Francisco
13h 04m
1 stop
LHR07:20London Heathrow
€497
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British Airways
11 Feb
LHR11:45London Heathrow
11h 15m
SFO15:00San Francisco
25 Feb
SFO16:26San Francisco
12h 49m
1 stop
LHR13:15London Heathrow
€498
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British Airways
20 Sept
LHR16:55London Heathrow
14h 21m
1 stop
SFO23:16San Francisco
4 Oct
SFO19:20San Francisco
10h 25m
LHR13:45London Heathrow
€499
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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 13,528 searches. Data last updated 26 August 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

Sun 23/11

19:30-14:35

1 stop27h 05m

San Francisco

Sun 30/11

16:40-19:55

2 stops19h 15m

€478

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 5/9

08:40-16:10

1 stop15h 30m

San Francisco

Fri 19/9

00:43-07:40

1 stop22h 57m

€479

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 24/9

09:30-16:00

1 stop14h 30m

San Francisco

Thu 4/12

12:50-07:25

Nonstop10h 35m

€483

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 11/9

11:15-14:15

Nonstop11h 00m

San Francisco

Wed 24/9

16:05-10:25

Nonstop10h 20m

€492

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 11/9

16:25-19:30

Nonstop11h 05m

San Francisco

Wed 24/9

16:05-10:25

Nonstop10h 20m

€493

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 26/9

10:45-13:50

Nonstop11h 05m

San Francisco

Sat 11/10

10:16-07:20

1 stop13h 04m

€497

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 11/2

11:45-15:00

Nonstop11h 15m

San Francisco

Wed 25/2

16:26-13:15

1 stop12h 49m

€498

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 11/9

06:30-12:40

1 stop14h 10m

San Francisco

Fri 19/9

13:55-11:45

1 stop13h 50m

€501

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 7/9

10:35-13:40

Nonstop11h 05m

San Francisco

Sun 14/9

16:05-10:25

Nonstop10h 20m

€507

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 11/9

10:35-13:40

Nonstop11h 05m

San Francisco

Wed 17/9

13:05-07:25

Nonstop10h 20m

€508

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?

The cheapest month to fly to San Francisco from London Heathrow Airport is in February. Flight prices, which tend to average around €482, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to San Francisco from London Heathrow Airport during November instead. Flights to San Francisco in November, while not as cheap as those in February, still average around €504.

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

On average, the least expensive day to fly to San Francisco from London Heathrow Airport is on a Monday. momondo users have found tickets for Monday departures for as low as €501. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €673.

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 €540. 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 €738 on average. Flights to San Francisco from London Heathrow Airport in the afternoon 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 €576 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 €527 on momondo.

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

There is only 1 cabin class 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 18% 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 August 2025, prices for London Heathrow Airport to San Francisco flights are approximately 25% 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

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

    A flight from London Heathrow to San Francisco will travel around 8596.0 km. Flights usually cover this in 11h 00m, depending on flying conditions and air traffic around both airports.

  • 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to San Francisco Airport.

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

    The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable 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
Santa Cruz
Millbrae
Walnut Creek
Alameda
Menlo Park

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to San Francisco for you.

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?

Yes. momondo can track prices for London to San Francisco flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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