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Cheap flights from London Heathrow Airport to San Francisco from €395

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 4/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from London Heathrow Airport to San Francisco

Cheap return flights

United Airlines Logo
06:30 - 17:45LHR-SFO
19h 15m2 stops
United Airlines Logo
06:30 - 08:20SFO-LHR
17h 50m1 stop
€441United Airlines
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Fri, 3 Oct - Sun, 12 Oct
United Airlines Logo
06:30 - 17:45LHR-SFO
19h 15m2 stops
United Airlines Logo
13:25 - 11:10SFO-LHR
13h 45m1 stop
€442United Airlines
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Wed, 1 Oct - Wed, 8 Oct
United Airlines Logo
06:30 - 21:50LHR-SFO
23h 20m2 stops
United Airlines Logo
08:30 - 09:35SFO-LHR
17h 05m1 stop
€442United Airlines
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Wed, 1 Oct - Sun, 12 Oct
Delta Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Delta Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
€447Delta
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Tue, 7 Oct - Mon, 3 Nov
British Airways Logo
06:15 - 21:58LHR-SFO
23h 43m2 stops
British Airways Logo
17:30 - 12:00SFO-LHR
10h 30mdirect
€449British Airways
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Wed, 11 Feb - Fri, 6 Mar
Delta Logo
06:15 - 12:50LHR-SFO
14h 35m1 stop
Delta Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
€450Delta
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Thu, 2 Oct - Thu, 6 Nov
Austrian Airlines Logo
10:35 - 13:40LHR-SFO
11h 05mdirect
Austrian Airlines Logo
19:50 - 14:10SFO-LHR
10h 20mdirect
€455Austrian Airlines
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Fri, 3 Oct - Tue, 7 Oct
British Airways Logo
16:30 - 00:35LHR-SFO
16h 05m1 stop
British Airways Logo
18:09 - 14:00SFO-LHR
12h 51m1 stop
€457British Airways
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Sun, 2 Nov - Fri, 20 Mar
Scandinavian Airlines Logo
19:30 - 15:35LHR-SFO
27h 05m1 stop
Scandinavian Airlines Logo
17:40 - 18:50SFO-LHR
18h 10m2 stops
€463Scandinavian Airlines
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Sun, 8 Mar - Tue, 17 Mar
Scandinavian Airlines Logo
19:50 - 14:35LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
€465Scandinavian Airlines
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Wed, 28 Jan - Mon, 9 Feb

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
11 Feb
LHR06:15London Heathrow
23h 43m
2 stops
SFO21:58San Francisco
6 Mar
SFO17:30San Francisco
10h 30m
LHR12:00London Heathrow
€449
Find similar
British Airways
2 Nov
LHR16:30London Heathrow
16h 05m
1 stop
SFO00:35San Francisco
20 Mar
SFO18:09San Francisco
12h 51m
1 stop
LHR14:00London Heathrow
€457
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British Airways
27 Sept
LHR08:20London Heathrow
18h 15m
1 stop
SFO18:35San Francisco
2 Nov
SFO23:59San Francisco
22h 51m
1 stop
LHR06:50London Heathrow
€458
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Delta flights from London Heathrow Airport to San Francisco

Our best Delta deals on London Heathrow Airport to San Francisco flight tickets
Delta
24 Sept
LHR06:30London Heathrow
13h 15m
1 stop
SFO11:45San Francisco
3 Nov
SFO16:30San Francisco
10h 10m
LHR10:40London Heathrow
€446
Find similar
Delta
7 Oct
LHR06:30London Heathrow
13h 15m
1 stop
SFO11:45San Francisco
3 Nov
SFO16:30San Francisco
10h 10m
LHR10:40London Heathrow
€447
Find similar
Delta
2 Oct
LHR06:15London Heathrow
14h 35m
1 stop
SFO12:50San Francisco
6 Nov
SFO16:30San Francisco
10h 10m
LHR10:40London Heathrow
€450
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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 18 September 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

Fri 3/10

06:30-17:45

2 stops19h 15m

San Francisco

Sun 12/10

06:30-08:20

1 stop17h 50m

€441

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/10

06:30-17:45

2 stops19h 15m

San Francisco

Wed 8/10

13:25-11:10

1 stop13h 45m

€442

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 1/10

06:30-21:50

2 stops23h 20m

San Francisco

Sun 12/10

08:30-09:35

1 stop17h 05m

€442

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 7/10

06:30-11:45

1 stop13h 15m

San Francisco

Mon 3/11

16:30-10:40

Nonstop10h 10m

€447

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 11/2

06:15-21:58

2 stops23h 43m

San Francisco

Fri 6/3

17:30-12:00

Nonstop10h 30m

€449

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 2/10

06:15-12:50

1 stop14h 35m

San Francisco

Thu 6/11

16:30-10:40

Nonstop10h 10m

€450

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 3/10

10:35-13:40

Nonstop11h 05m

San Francisco

Tue 7/10

19:50-14:10

Nonstop10h 20m

€455

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 2/11

16:30-00:35

1 stop16h 05m

San Francisco

Fri 20/3

18:09-14:00

1 stop12h 51m

€457

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 8/3

19:30-15:35

1 stop27h 05m

San Francisco

Tue 17/3

17:40-18:50

2 stops18h 10m

€463

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

€465

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 €473, 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 €489.

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 Saturday. momondo users have found tickets for Saturday departures for as low as €524. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday 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 €727.

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 €530. 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 €870 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 €565 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 €523 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 September 2025, prices for London Heathrow Airport to San Francisco flights are approximately 31% 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

Fastest flight time

11h 00m

Direct flights

Every day

Airports in San Francisco

1 airport
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)
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  • 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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