Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London to San Francisco from €391

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 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London 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
Find Deal
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
Find Deal
Wed, 1 Oct - Wed, 8 Oct
United Airlines Logo
06:30 - 17:45LHR-SFO
19h 15m2 stops
United Airlines Logo
09:00 - 07:40SFO-LHR
14h 40m1 stop
€442United Airlines
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Delta Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Delta Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
€447Delta
Find Deal
Tue, 7 Oct - Mon, 3 Nov
Delta Logo
06:30 - 11:45LHR-SFO
13h 15m1 stop
Delta Logo
16:30 - 10:40SFO-LHR
10h 10mdirect
€448Delta
Find Deal
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
Find Deal
Wed, 11 Feb - Fri, 6 Mar
Multiple Airlines Logo
10:35 - 13:40LHR-SFO
11h 05mdirect
Multiple Airlines Logo
19:50 - 14:10SFO-LHR
10h 20mdirect
€452Multiple Airlines
Find Deal
Mon, 29 Sep - Tue, 14 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
Find Deal
Sun, 2 Nov - Fri, 20 Mar
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 18:30SFO-LHR
17h 50m2 stops
€463Scandinavian Airlines
Find Deal
Mon, 8 Dec - Fri, 9 Jan
Scandinavian Airlines Logo
19:50 - 14:35LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
€465Scandinavian Airlines
Find Deal
Wed, 28 Jan - Mon, 9 Feb

British Airways flights from London to San Francisco

Our best British Airways deals on London 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
Find similar
British Airways
27 Sept
LHR10:05London Heathrow
19h 41m
1 stop
SFO21:46San Francisco
3 Nov
SFO12:11San Francisco
13h 49m
1 stop
LHR10:00London Heathrow
€458
Find similar

Delta flights from London to San Francisco

Our best Delta deals on London 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
7 Oct
LHR06:30London Heathrow
13h 15m
1 stop
SFO11:45San Francisco
3 Nov
SFO16:30San Francisco
10h 10m
LHR10:40London Heathrow
€448
Find similar

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 18 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

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

06:30-17:45

2 stops19h 15m

San Francisco

Wed 8/10

09:00-07:40

1 stop14h 40m

€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

Tue 7/10

06:30-11:45

1 stop13h 15m

San Francisco

Mon 3/11

16:30-10:40

Nonstop10h 10m

€448

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

Mon 29/9

10:35-13:40

Nonstop11h 05m

San Francisco

Tue 14/10

19:50-14:10

Nonstop10h 20m

€452

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

Mon 8/12

06:40-14:35

1 stop15h 55m

San Francisco

Fri 9/1

16:40-18:30

2 stops17h 50m

€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
1
2

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 €477, 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 €485.

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 €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 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 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 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 €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 for as low as €523 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 18% 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

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)
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. By plane, this route typically takes 11h 00m.

  • 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

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 18/10
Sat 25/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States