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Cheap flights from London to San Francisco from £377

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 14/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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TAP AIR PORTUGAL Logo
10:35 - 16:50LGW-SFO
38h 15m1 stop
TAP AIR PORTUGAL Logo
19:55 - 09:45SFO-LGW
29h 50m1 stop
£396TAP AIR PORTUGAL
Find Deal
Thu, 30 Apr - Thu, 7 May
TAP AIR PORTUGAL Logo
06:00 - 14:35LHR-SFO
16h 35m1 stop
TAP AIR PORTUGAL Logo
16:35 - 17:30SFO-LHR
16h 55m1 stop
£402TAP AIR PORTUGAL
Find Deal
Mon, 2 Mar - Sat, 7 Mar
TAP AIR PORTUGAL Logo
19:55 - 16:05LHR-SFO
28h 10m1 stop
TAP AIR PORTUGAL Logo
16:35 - 17:30SFO-LHR
16h 55m1 stop
£403TAP AIR PORTUGAL
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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
£416Scandinavian Airlines
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Mon, 23 Feb - Sat, 28 Feb
Scandinavian Airlines Logo
06:40 - 14:35LHR-SFO
15h 55m1 stop
Scandinavian Airlines Logo
17:40 - 16:00SFO-LHR
15h 20m1 stop
£418Scandinavian Airlines
Find Deal
Mon, 2 Mar - Tue, 10 Mar
Finnair Logo
11:20 - 13:46LGW-SFO
34h 26m2 stops
Finnair Logo
06:00 - 07:30SFO-LGW
17h 30m2 stops
£463Finnair
Find Deal
Tue, 13 Jan - Tue, 20 Jan
Lufthansa Logo
09:50 - 15:55LCY-SFO
14h 05m1 stop
Lufthansa Logo
18:50 - 17:40SFO-LCY
14h 50m1 stop
£485Lufthansa
Find Deal
Tue, 20 Jan - Thu, 19 Feb
Lufthansa Logo
09:50 - 15:55LCY-SFO
14h 05m1 stop
Lufthansa Logo
18:50 - 16:40SFO-LCY
13h 50m1 stop
£490Lufthansa
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Virgin Atlantic Logo
09:20 - 20:21LCY-SFO
19h 01m2 stops
Virgin Atlantic Logo
13:45 - 16:40SFO-LCY
18h 55m1 stop
£501Virgin Atlantic
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Tue, 31 Mar - Thu, 9 Apr
Virgin Atlantic Logo
07:45 - 20:59LCY-SFO
21h 14m2 stops
Virgin Atlantic Logo
06:00 - 07:15SFO-LCY
17h 15m2 stops
£506Virgin Atlantic
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Wed, 18 Feb - Mon, 23 Feb

Scandinavian Airlines flights from London to San Francisco

Our best Scandinavian Airlines deals on London to San Francisco flight tickets
Scandinavian Airlines
23 Feb
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
28 Feb
SFO16:40San Francisco
17h 50m
1 stop
LHR18:30London Heathrow
£416
Find similar
Scandinavian Airlines
2 Mar
LHR06:40London Heathrow
15h 55m
1 stop
SFO14:35San Francisco
10 Mar
SFO17:40San Francisco
15h 20m
1 stop
LHR16:00London Heathrow
£418
Find similar
Scandinavian Airlines
16 Jan
LHR19:50London Heathrow
26h 45m
2 stops
SFO14:35San Francisco
30 Jan
SFO16:40San Francisco
15h 20m
1 stop
LHR16:00London Heathrow
£419
Find similar

Virgin Atlantic flights from London to San Francisco

Our best Virgin Atlantic deals on London to San Francisco flight tickets
Virgin Atlantic
31 Mar
LCY09:20London City
19h 01m
2 stops
SFO20:21San Francisco
9 Apr
SFO13:45San Francisco
18h 55m
1 stop
LCY16:40London City
£501
Find similar
Virgin Atlantic
18 Feb
LCY07:45London City
21h 14m
2 stops
SFO20:59San Francisco
23 Feb
SFO06:00San Francisco
17h 15m
2 stops
LCY07:15London City
£506
Find similar
Virgin Atlantic
15 Jan
LCY07:45London City
21h 14m
2 stops
SFO20:59San Francisco
20 Jan
SFO06:00San Francisco
17h 15m
2 stops
LCY07:15London City
£510
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 279,928 searches. Data last updated 6 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

LGW - SFO

LGWSFO

London Gatwick

Thu 30/4

10:35-16:50

1 stop38h 15m

San Francisco

Thu 7/5

19:55-09:45

1 stop29h 50m

£396

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/3

06:00-14:35

1 stop16h 35m

San Francisco

Sat 7/3

16:35-17:30

1 stop16h 55m

£402

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 4/12

19:55-16:05

1 stop28h 10m

San Francisco

Mon 8/12

16:35-17:30

1 stop16h 55m

£403

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 23/2

06:40-14:35

1 stop15h 55m

San Francisco

Sat 28/2

16:40-18:30

1 stop17h 50m

£416

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 2/3

06:40-14:35

1 stop15h 55m

San Francisco

Tue 10/3

17:40-16:00

1 stop15h 20m

£418

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Tue 13/1

11:20-13:46

2 stops34h 26m

San Francisco

Tue 20/1

06:00-07:30

2 stops17h 30m

£463

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Tue 20/1

09:50-15:55

1 stop14h 05m

San Francisco

Thu 19/2

18:50-17:40

1 stop14h 50m

£485

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Wed 3/12

09:50-15:55

1 stop14h 05m

San Francisco

Wed 10/12

18:50-16:40

1 stop13h 50m

£490

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Tue 31/3

09:20-20:21

2 stops19h 01m

San Francisco

Thu 9/4

13:45-16:40

1 stop18h 55m

£501

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Wed 18/2

07:45-20:59

2 stops21h 14m

San Francisco

Mon 23/2

06:00-07:15

2 stops17h 15m

£506

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 cheapest month to fly to San Francisco?

The month of September is, on average, the cheapest month to fly to San Francisco from London, with most prices found around £441. If you are unable to visit San Francisco during the month of September, then departing from London during the month February is also very affordable. Most momondo users find prices during this month for around £444.

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

The cheapest day to depart on your flight to San Francisco is on a Thursday when prices can be found for as low as £599. This is often the case because there is less demand to fly during this day of the week. Flights from London to San Francisco on a Sunday will generally be more expensive and average around £696. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to San Francisco is in the evening. Flights from London to San Francisco during this time can be as low as £493. Try not to purchase tickets at midday because they tend to be around £990. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 £520 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 £482 on momondo.

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

There are 4 cabin classes 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 23% 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 13% 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

Best price found

£400

Fastest flight time

11h 00m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from London in the past 72 hours is £400. The best return flight deal from London to San Francisco found on momondo in the last 72 hours is £556.
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?

    A flight from London to San Francisco will travel around 5349.7 mi. 14h 05m is a normal flight duration for this route.

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

    Prices for flights from London to San Francisco Airport are updated daily.

  • How many operators does momondo search for flights from London to San Francisco Airport?

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 license 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?

  • What is the most popular airline from London to San Francisco?

Best airlines flying from London to San Francisco

Compare and see reviews for airlines that fly from London to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom £245Free CancellationRating
7.9
8,004 reviews
Search Delta flights
Air CanadaPriceFrom £345Free CancellationRating
7.1
10,404 reviews
Search Air Canada flights
Aer LingusPriceFrom £361Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
TAP AIR PORTUGALPriceFrom £361Free CancellationRating
7.1
2,046 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom £364Free CancellationRating
7.4
1,560 reviews
Search Scandinavian Airlines flights
United AirlinesPriceFrom £368Free CancellationRating
7.4
9,000 reviews
Search United Airlines flights
SWISSPriceFrom £368Free CancellationRating
7.5
1,777 reviews
Search SWISS flights
Brussels AirlinesPriceFrom £376Free CancellationRating
7.2
369 reviews
Search Brussels Airlines flights
FinnairPriceFrom £381Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
KLMPriceFrom £381Free CancellationRating
7.7
1,405 reviews
Search KLM flights

  • Delta Flights From London to San Francisco

    The lowest priced Delta flight from London to San Francisco from the last 72 hours was £245. Generally, Delta has 7 flights on this route every week with an average price of £528. Delta is rated 7.9/10 by our users.

  • KLM Flights From London to San Francisco

    KLM is also a popular choice for this route. KLM flight deals for London to San Francisco start from as low as £381 round-trip, depending on your selected dates, with average KLM deals seen on momondo around £470. KLM operates 7 flights to San Francisco from London in an average week. Users have rated it 7.7/10 across 1,405 reviews.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Carmel-by-the-Sea
Santa Clara
Seaside
Big Sur
Rohnert Park
Sunnyvale
San Ramon
South San Francisco
Capitola
Campbell
Palo Alto
Sausalito
San Bruno
Woodland
Santa Cruz
Redwood City
Burlingame
Modesto
Aptos
Fremont

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from London.

Can I find flights from London to San Francisco with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Francisco from London which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to San Francisco.

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

Of course. momondo tracks the price of London to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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
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