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Cheap flights from London to San Francisco from $794

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
30 mar. — 6 abr.1
1 adult

Cheapflights Tip: The best prices from London to San Francisco are usually found in February or November, booked 83 days in advance, depart on a Wednesday or Sunday and return on a Monday

Cheap flight deals from London to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 25 marzo 2025.

Round-trip from

$827

One-way from

$794

Popular in

July

Cheapest in

February

Average price

$981

Good round-trip deal

$2,170 or less
United Airlines
  • United Airlines
  • 31/5-13/6
  • 3 total stops
  • 41h 03m total
  • London to San Francisco
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16/6
  • 16/6
  • 1 total stop
  • 29h 44m total
  • London to San Francisco
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Highest demand for flights based on searches. 18% potential increase in price ($392 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease ($55 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from London (LON) to San Francisco.
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Find flight deals from London to San Francisco

Cheapest flights from London to San Francisco
Explore the most affordable flight options available from London to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 marzo 2025.

sáb. 31/514:10LHR - SFO
2 stops27h 28mUnited Airlines
vie. 13/614:15SFO - LHR
1 stop13h 35mUnited Airlines
Deal found 24/3$827
sáb. 29/319:30LHR - SFO
2 stops28h 30mLufthansa
vie. 25/422:35SFO - LHR
2 stops23h 20mLufthansa
Deal found 25/3$837
mar. 9/918:35LGW - SFO
1 stop29h 35mSWISS
lun. 22/919:30SFO - LGW
1 stop14h 20mSWISS
Deal found 24/3$841
lun. 1/910:20LHR - SFO
1 stop14h 10mScandinavian Airlines
lun. 22/919:40SFO - LHR
1 stop14h 00mScandinavian Airlines
Deal found 25/3$843
vie. 2/508:40LHR - SFO
1 stop15h 30mMultiple Airlines
lun. 12/512:55SFO - LHR
Nonstop10h 30mMultiple Airlines
Deal found 24/3$846
jue. 1/518:40LHR - SFO
1 stop29h 30mSWISS
jue. 8/514:00SFO - LHR
1 stop18h 25mSWISS
Deal found 25/3$849
mar. 22/406:15LHR - SFO
1 stop14h 35mDelta
mié. 30/416:05SFO - LHR
Nonstop10h 20mDelta
Deal found 24/3$870
jue. 4/915:05LGW - SFO
1 stop16h 52mMultiple Airlines
jue. 18/907:20SFO - LGW
1 stop16h 50mMultiple Airlines
Deal found 24/3$870
mié. 3/916:25LGW - SFO
1 stop30h 05mTAP AIR PORTUGAL
mar. 23/916:20SFO - LGW
1 stop15h 15mTAP AIR PORTUGAL
Deal found 25/3$883
mié. 30/409:25LCY - SFO
1 stop14h 45mSWISS
dom. 11/519:30SFO - LCY
1 stop14h 00mSWISS
Deal found 24/3$886
mié. 24/918:45LHR - SFO
1 stop27h 45mTAP AIR PORTUGAL
jue. 2/1016:20SFO - LHR
1 stop21h 45mTAP AIR PORTUGAL
Deal found 24/3$888
lun. 21/411:15LHR - SFO
Nonstop11h 00mVirgin Atlantic
dom. 4/521:20SFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 25/3$891

Cheapflights 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, Cheapflights users made 647,157 searches. Data last updated 25 marzo 2025.
Use the filters below to find and compare flights from London to San Francisco that are best for you.

Fly from

London

Fly to

San Francisco

Route

Depart

Return

Price

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

sáb. 31/5

14:10-09:38

2 stops27h 28m

San Francisco

vie. 13/6

14:15-11:50

1 stop13h 35m

$827

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

mar. 9/9

18:35-16:10

1 stop29h 35m

San Francisco

lun. 22/9

19:30-17:50

1 stop14h 20m

$841

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

lun. 1/9

10:20-16:30

1 stop14h 10m

San Francisco

lun. 22/9

19:40-17:40

1 stop14h 00m

$843

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

vie. 9/5

08:40-16:10

1 stop15h 30m

San Francisco

vie. 16/5

15:55-10:25

Nonstop10h 30m

$845

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

jue. 1/5

18:40-16:10

1 stop29h 30m

San Francisco

jue. 8/5

14:00-16:25

1 stop18h 25m

$849

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

sáb. 26/4

06:30-16:05

1 stop17h 35m

San Francisco

mar. 29/4

07:00-07:15

1 stop16h 15m

$865

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

mar. 22/4

06:15-12:50

1 stop14h 35m

San Francisco

mié. 30/4

07:30-06:45

1 stop15h 15m

$870

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

jue. 4/9

15:05-23:57

1 stop16h 52m

San Francisco

jue. 18/9

07:20-08:10

1 stop16h 50m

$870

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

mié. 3/9

16:25-14:30

1 stop30h 05m

San Francisco

mar. 23/9

16:20-15:35

1 stop15h 15m

$883

LondonSan Francisco

LCY - SFO

LCYSFO

London City

mié. 30/4

09:25-16:10

1 stop14h 45m

San Francisco

dom. 11/5

19:30-17:30

1 stop14h 00m

$886

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 60 results
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Best time to book a flight from London to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to San Francisco

How far ahead should I book a flight from London to San Francisco?

Use this chart to determine the optimal time to book a return flight from London to San Francisco. Price data was last updated on 21 March 2025.

The best time to book flights from London to San Francisco is 60 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London to San Francisco?

Currently, March is the cheapest month in which you can book a flight from London to San Francisco (average of $876). Flying from London to San Francisco in December is currently the most expensive (average of $1,375). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to SFO?

Find hourly flight availability from London to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 marzo 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 47% on flights from London to San Francisco by exploring options for tickets in the morning.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated 25 marzo 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from London to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from London to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to San Francisco from London?

    Located just 19.0 km from the city centre, San Francisco is the airport most travellers will use when flying to San Francisco from London. Booking flights from London to San Francisco (SFO) should be relatively easy as there are 26 daily inbound flights from London from 0 different airlines.

  • What are the cheapest airlines flying from London to San Francisco round-trip?

    Cheapflights users have booked flights from London to San Francisco round-trip from $827. Other airlines that can offer you cheap pricing are SWISS, from $841, and Scandinavian Airlines, from $843. United Airlines is 24% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from London to San Francisco one-way?

    The cheapet airlines for a one-way flight from London to San Francisco are WestJet ($803), TAP AIR PORTUGAL ($818), and Delta ($1,152).

  • What are the most popular routes from London to San Francisco?

    Most travellers choose London Stansted - San Francisco, London Luton - San Francisco or London Southend - San Francisco when deciding on the best route from London to San Francisco.

  • What are the most reliable airlines from London to San Francisco?

    Before booking your flight to San Francisco from London, have a look at the most reliable airlines to get you to your destination on time: American Airlines (91%), Aer Lingus (91%), Alaska Airlines( 91%).

  • What are the cheapest flights from London to San Francisco?

    Looking for the cheapest flight from London to San Francisco? While on average our users pay $2,180, our data indicates the cheapest price to be $887. The most popular route (London Stansted - San Francisco), is priced around $698.

  • Can I find deals for flights from London to San Francisco that include hotel bookings?

    Yes. In addition to deals on London to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Francisco.

  • Can I find deals for business class flights from London to San Francisco?

    Yes. Cheapflights offers flight deals from London to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to San Francisco?

    Currently, March is the cheapest month in which you can book a flight from London to San Francisco (average of $876). Flying from London to San Francisco in December is currently the most expensive (average of $1,375). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Sunnyvale
Los Gatos
Davis
Mountain View
Emeryville
Stanford
Sausalito
Hayward
Daly City

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Alternative routes for London to San Francisco

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Fly with Cheapflights

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How does Cheapflights help users find flights from London to San Francisco?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from London to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from London to San Francisco?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Francisco from London.

Can Cheapflights find flights from London to San Francisco with no change fees?

Certainly. Search results for flights to San Francisco from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to San Francisco become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from London today and book when prices fit your budget.

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