Find flights
Deals
When to book
FAQs

Cheap flights from London to San Francisco from $699

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 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
21 Nov — 28 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London to San Francisco are usually found in September or February, booked 51 days in advance, depart on a Wednesday or Sunday and return on a Tuesday

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 22 October 2025.

Round-trip from

$890

One-way from

$699

Popular in

July

Cheapest in

September

Average price

$1,005

Good round-trip deal

$2,005 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 21/2-1/3
  • 2 total stops
  • 31h 15m total
  • London to San Francisco
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 1/2
  • 2 total stops
  • 33h 38m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($267 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($44 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to San Francisco.
Search Deals

Find flight deals from London to San Francisco

Enter your travel dates to find the best prices.

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 22 October 2025.

Fri 14/1106:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Mon 17/1116:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 21/10$896
Thu 20/1121:05LHR - SFO
2 stops25h 30mScandinavian Airlines
Sun 7/1216:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 20/10$907
Thu 4/1206:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Mon 8/1216:40SFO - LHR
1 stop17h 00mScandinavian Airlines
Deal found 21/10$910
Fri 21/1121:05LHR - SFO
2 stops25h 30mScandinavian Airlines
Sun 30/1116:40SFO - LHR
2 stops16h 20mScandinavian Airlines
Deal found 20/10$913
Sat 8/1106:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Sat 15/1116:40SFO - LHR
1 stop17h 00mScandinavian Airlines
Deal found 20/10$921
Mon 24/1121:25LGW - SFO
2 stops49h 05mTAP AIR PORTUGAL
Mon 8/1216:35SFO - LGW
1 stop15h 10mTAP AIR PORTUGAL
Deal found 20/10$928
Mon 15/1221:25LGW - SFO
2 stops49h 05mTAP AIR PORTUGAL
Sat 17/116:35SFO - LGW
1 stop33h 15mTAP AIR PORTUGAL
Deal found 20/10$930
Mon 24/1121:25LGW - SFO
2 stops49h 05mTAP AIR PORTUGAL
Fri 5/1219:10SFO - LGW
1 stop30h 40mTAP AIR PORTUGAL
Deal found 20/10$931
Thu 4/1221:05LHR - SFO
2 stops25h 30mScandinavian Airlines
Thu 11/1216:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 20/10$938
Wed 5/1121:05LHR - SFO
2 stops25h 30mScandinavian Airlines
Mon 10/1116:40SFO - LHR
2 stops18h 10mScandinavian Airlines
Deal found 20/10$939
Fri 5/1206:40LHR - SFO
1 stop15h 55mScandinavian Airlines
Mon 8/1216:40SFO - LHR
1 stop17h 50mScandinavian Airlines
Deal found 21/10$941
Wed 5/1121:05LHR - SFO
2 stops25h 30mScandinavian Airlines
Sat 6/1216:40SFO - LHR
2 stops19h 15mScandinavian Airlines
Deal found 20/10$944

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 22 October 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

Sat 21/2

06:40-14:35

1 stop15h 55m

San Francisco

Sun 1/3

16:40-18:30

1 stop17h 50m

$893

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 20/11

21:05-14:35

2 stops25h 30m

San Francisco

Thu 27/11

16:40-21:20

2 stops20h 40m

$907

LondonSan Francisco

LGW - SFO

LGWSFO

London Gatwick

Wed 4/2

09:35-16:05

2 stops62h 30m

San Francisco

Wed 18/2

16:35-09:50

1 stop33h 15m

$911

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 24/11

09:00-16:30

1 stop15h 30m

San Francisco

Mon 8/12

16:15-13:30

1 stop13h 15m

$953

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 4/11

09:00-16:30

1 stop15h 30m

San Francisco

Wed 14/1

16:20-13:30

1 stop13h 10m

$976

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 3/11

09:00-16:30

1 stop15h 30m

San Francisco

Wed 26/11

12:50-07:25

Nonstop10h 35m

$976

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 2/12

10:05-13:20

Nonstop11h 15m

San Francisco

Tue 9/12

12:50-07:25

Nonstop10h 35m

$1,005

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Mon 24/11

09:50-15:55

1 stop14h 05m

San Francisco

Tue 9/12

18:50-16:40

1 stop13h 50m

$1,008

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Mon 24/11

09:50-15:55

1 stop14h 05m

San Francisco

Mon 8/12

18:50-16:40

1 stop13h 50m

$1,008

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Wed 3/12

09:50-15:55

1 stop14h 05m

San Francisco

Tue 9/12

18:50-16:40

1 stop13h 50m

$1,008

Flights are sorted by cheapest return flights first.

Deals found on 20/10

Showing 1-10 of 60 results
1
2
3
...
6

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 17 October 2025.

The best time to book flights from London to San Francisco is 51 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, December is the cheapest month in which you can book a flight from London to San Francisco (average of $697). Flying from London to San Francisco in July is currently the most expensive (average of $944). 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 22 October 2025.

When flying from London to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 31 daily inbound flights from London from 0 different airlines.

  • How long is the flight from London to San Francisco?

    For as low as $951, Scandinavian Airlines can have you in San Francisco from London in 15h 30m. The distance between London and San Francisco is about 8610 km. This flight may include one or multiple stops.

  • 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: Air New Zealand (87%), KLM (85%), Air France( 85%).

  • 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 $2,189, our data indicates the cheapest price to be $861. The most popular route (London Stansted - San Francisco), is priced around $676.

  • 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, December is the cheapest month in which you can book a flight from London to San Francisco (average of $697). Flying from London to San Francisco in July is currently the most expensive (average of $944). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Sausalito
Santa Cruz
Los Gatos
Mountain View
Davis
Emeryville
Milpitas

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Los Angeles flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.