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Cheap flights from London to San Francisco from €388

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 8/12. 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

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Scandinavian Airlines Logo
15:35 - 14:35LHR-SFO
31h 00m2 stops
Scandinavian Airlines Logo
16:40 - 19:55SFO-LHR
19h 15m2 stops
€471Scandinavian Airlines
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Sat, 8 Nov - Sat, 15 Nov
Scandinavian Airlines Logo
19:50 - 14:35LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
16:40 - 18:30SFO-LHR
17h 50m1 stop
€494Scandinavian Airlines
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Wed, 28 Jan - Mon, 9 Feb
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
€495Scandinavian Airlines
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Sat, 6 Dec - Mon, 12 Jan
SWISS Logo
09:00 - 16:30LHR-SFO
15h 30m1 stop
SWISS Logo
19:25 - 17:50SFO-LHR
14h 25m1 stop
€500SWISS
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Mon, 17 Nov - Mon, 1 Dec
United Airlines Logo
09:00 - 16:30LHR-SFO
15h 30m1 stop
United Airlines Logo
16:10 - 10:40SFO-LHR
10h 30mdirect
€524United Airlines
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Mon, 3 Nov - Tue, 31 Mar
United Airlines Logo
09:00 - 16:30LHR-SFO
15h 30m1 stop
United Airlines Logo
12:50 - 07:25SFO-LHR
10h 35mdirect
€526United Airlines
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Mon, 17 Nov - Mon, 1 Dec
SWISS Logo
09:00 - 16:30LHR-SFO
15h 30m1 stop
SWISS Logo
11:45 - 16:20SFO-LHR
20h 35m2 stops
€531SWISS
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Wed, 14 Jan - Wed, 21 Jan
Air Canada Logo
14:30 - 20:34LHR-SFO
14h 04m1 stop
Air Canada Logo
08:25 - 11:20SFO-LHR
18h 55m2 stops
€542Air Canada
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Mon, 17 Nov - Mon, 1 Dec
British Airways Logo
06:15 - 23:12LHR-SFO
24h 57m2 stops
British Airways Logo
23:00 - 22:10SFO-LHR
15h 10m1 stop
€545British Airways
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Wed, 11 Feb - Sun, 15 Feb
British Airways Logo
07:35 - 21:36LHR-SFO
22h 01m2 stops
British Airways Logo
23:00 - 06:20SFO-LHR
23h 20m1 stop
€548British Airways
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Wed, 11 Feb - Sun, 15 Feb

SWISS flights from London to San Francisco

Our best SWISS deals on London to San Francisco flight tickets
SWISS
17 Nov
LHR09:00London Heathrow
15h 30m
1 stop
SFO16:30San Francisco
1 Dec
SFO19:25San Francisco
14h 25m
1 stop
LHR17:50London Heathrow
€500
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SWISS
14 Jan
LHR09:00London Heathrow
15h 30m
1 stop
SFO16:30San Francisco
21 Jan
SFO11:45San Francisco
20h 35m
2 stops
LHR16:20London Heathrow
€531
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SWISS
2 Dec
LHR18:40London Heathrow
29h 50m
1 stop
SFO16:30San Francisco
10 Dec
SFO19:25San Francisco
15h 50m
1 stop
LHR19:15London Heathrow
€540
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Scandinavian Airlines flights from London to San Francisco

Our best Scandinavian Airlines deals on London to San Francisco flight tickets
Scandinavian Airlines
8 Nov
LHR15:35London Heathrow
31h 00m
2 stops
SFO14:35San Francisco
15 Nov
SFO16:40San Francisco
19h 15m
2 stops
LHR19:55London Heathrow
€471
Find similar
Scandinavian Airlines
28 Jan
LHR19:50London Heathrow
26h 45m
2 stops
SFO14:35San Francisco
9 Feb
SFO16:40San Francisco
17h 50m
1 stop
LHR18:30London Heathrow
€494
Find similar
Scandinavian Airlines
6 Dec
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
12 Jan
SFO16:40San Francisco
18h 10m
2 stops
LHR18:50London Heathrow
€495
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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 13,528 searches. Data last updated 17 October 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

Sat 8/11

15:35-14:35

2 stops31h 00m

San Francisco

Sat 15/11

16:40-19:55

2 stops19h 15m

€471

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

€494

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 6/12

06:40-14:35

1 stop15h 55m

San Francisco

Mon 12/1

16:40-18:50

2 stops18h 10m

€495

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/11

09:00-16:30

1 stop15h 30m

San Francisco

Mon 1/12

19:25-17:50

1 stop14h 25m

€500

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 3/11

09:00-16:30

1 stop15h 30m

San Francisco

Tue 31/3

16:10-10:40

Nonstop10h 30m

€524

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/11

09:00-16:30

1 stop15h 30m

San Francisco

Mon 1/12

12:50-07:25

Nonstop10h 35m

€526

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 14/1

09:00-16:30

1 stop15h 30m

San Francisco

Wed 21/1

11:45-16:20

2 stops20h 35m

€531

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 17/11

14:30-20:34

1 stop14h 04m

San Francisco

Mon 1/12

08:25-11:20

2 stops18h 55m

€542

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 11/2

06:15-23:12

2 stops24h 57m

San Francisco

Sun 15/2

23:00-22:10

1 stop15h 10m

€545

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 11/2

07:35-21:36

2 stops22h 01m

San Francisco

Sun 15/2

23:00-06:20

1 stop23h 20m

€548

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 typical price of a round-trip flight between London and San Francisco?

What is the cheapest month to fly to San Francisco?

The cheapest month to fly to San Francisco from London is in February. Flight prices, which tend to average around €492, 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 during September instead. Flights to San Francisco in September, while not as cheap as those in February, still average around €493.

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 is on a Saturday. momondo users have found tickets for Saturday departures for as low as €538. 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 because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €738.

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 €538. 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 €883 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 €579 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 €539 on momondo.

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

There is only 1 cabin class 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 32% 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 October 2025, prices for London to San Francisco flights are approximately 84% 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

Fastest flight time

11h 00m

Direct flights

Every day

Airports in San Francisco

1 airport
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)
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  • How far is London to San Francisco by plane?

    The straight-line distance from London to San Francisco is 8609.4 km. By plane, this route typically takes 11h 15m.

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

    Prices for flights from London to San Francisco Airport were last updated today.

  • 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 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 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?

All flight searches from London to San Francisco on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.

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

If you are simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from London and alert you when they change.

An easier way to manage your San Francisco trip

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