Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London to San Francisco from €437

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 4/1. 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

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 - 16:00SFO-LHR
15h 20m1 stop
€492Scandinavian Airlines
Find Deal
Sat, 21 Feb - Sun, 1 Mar
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 17:40SFO-LHR
17h 00m1 stop
€493Scandinavian Airlines
Find Deal
Sat, 21 Feb - Sun, 1 Mar
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
€495Scandinavian Airlines
Find Deal
Sat, 6 Dec - Mon, 12 Jan
Delta Logo
11:40 - 15:40LHR-SFO
11h 00mdirect
Delta Logo
16:40 - 14:15SFO-LHR
13h 35m1 stop
€496Delta
Find Deal
Mon, 23 Mar - Thu, 9 Apr
Scandinavian Airlines Logo
19:50 - 14:35LHR-SFO
26h 45m2 stops
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
€499Scandinavian Airlines
Find Deal
Wed, 28 Jan - Mon, 9 Feb
Scandinavian Airlines Logo
21:05 - 14:35LHR-SFO
25h 30m2 stops
Scandinavian Airlines Logo
16:40 - 16:25SFO-LHR
15h 45m2 stops
€501Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
21:05 - 14:35LHR-SFO
25h 30m2 stops
Scandinavian Airlines Logo
16:40 - 18:50SFO-LHR
18h 10m2 stops
€502Scandinavian Airlines
Find Deal
Thu, 4 Dec - Mon, 8 Dec
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 18:30SFO-LHR
17h 50m1 stop
€503Scandinavian Airlines
Find Deal
Thu, 12 Feb - Sun, 22 Feb
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
16:40 - 16:00SFO-LHR
15h 20m1 stop
€504Scandinavian Airlines
Find Deal
Fri, 5 Dec - Mon, 19 Jan
Scandinavian Airlines Logo
21:05 - 15:35LHR-SFO
25h 30m2 stops
Scandinavian Airlines Logo
17:40 - 19:55SFO-LHR
19h 15m2 stops
€505Scandinavian Airlines
Find Deal
Mon, 9 Mar - Mon, 23 Mar

Scandinavian Airlines flights from London to San Francisco

Our best Scandinavian Airlines deals on London 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
€492
Find similar
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
€493
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
Find similar

Delta flights from London to San Francisco

Our best Delta deals on London to San Francisco flight tickets
Delta
23 Mar
LHR11:40London Heathrow
11h 00m
SFO15:40San Francisco
9 Apr
SFO16:40San Francisco
13h 35m
1 stop
LHR14:15London Heathrow
€496
Find similar
Delta
17 Feb
LHR06:30London Heathrow
13h 20m
1 stop
SFO11:50San Francisco
24 Feb
SFO16:30San Francisco
10h 10m
LHR10:40London Heathrow
€525
Find similar
Delta
23 Mar
LHR06:20London Heathrow
15h 05m
1 stop
SFO14:25San Francisco
11 Apr
SFO13:35San Francisco
12h 15m
1 stop
LHR09:50London Heathrow
€529
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 19 November 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 21/2

06:40-14:35

1 stop15h 55m

San Francisco

Sun 1/3

16:40-16:00

1 stop15h 20m

€492

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

€493

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 23/3

11:40-15:40

Nonstop11h 00m

San Francisco

Thu 9/4

16:40-14:15

1 stop13h 35m

€496

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

€499

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 4/12

21:05-14:35

2 stops25h 30m

San Francisco

Mon 8/12

16:40-16:25

2 stops15h 45m

€501

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 4/12

21:05-14:35

2 stops25h 30m

San Francisco

Mon 8/12

16:40-18:50

2 stops18h 10m

€502

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 12/2

06:40-14:35

1 stop15h 55m

San Francisco

Sun 22/2

16:40-18:30

1 stop17h 50m

€503

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 5/12

06:40-14:35

1 stop15h 55m

San Francisco

Mon 19/1

16:40-16:00

1 stop15h 20m

€504

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/3

21:05-15:35

2 stops25h 30m

San Francisco

Mon 23/3

17:40-19:55

2 stops19h 15m

€505

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 September. Flight prices, which tend to average around €495, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to San Francisco from London during February instead. Flights to San Francisco in February, while not as cheap as those in September, still average around €500.

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 €541. 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 €743.

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 €541. 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 €889 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 €585 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 €542 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 November 2025, prices for London to San Francisco flights are approximately 12% 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
Fri 19/12
Fri 26/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States