Cheap flights from London to San Francisco from £393

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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
27 May — 3 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to San Francisco are usually found in February or September, booked 51 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap 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 27 April 2026.

Fri 28/806:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Fri 11/916:45
SFO
-
LHR
1 stop15h 15m
Scandinavian Airlines
Deal found 24/4£428
Thu 2/714:10
LHR
-
SFO
1 stop18h 48m
American Airlines
Tue 21/710:17
SFO
-
LHR
1 stop13h 48m
American Airlines
Deal found 23/4£428
Thu 2/714:10
LHR
-
SFO
1 stop18h 48m
American Airlines
Wed 22/706:10
SFO
-
LHR
1 stop16h 15m
American Airlines
Deal found 23/4£430
Fri 29/508:55
LHR
-
SFO
1 stop17h 05m
American Airlines
Thu 11/607:44
SFO
-
LHR
1 stop18h 36m
American Airlines
Deal found 23/4£440
Fri 8/513:05
LHR
-
SFO
1 stop15h 28m
United Airlines
Mon 18/507:15
SFO
-
LHR
1 stop14h 40m
United Airlines
Deal found 23/4£444
Mon 11/510:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Tue 19/516:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£457
Wed 1/710:55
LHR
-
SFO
1 stop13h 28m
Delta
Sat 18/712:42
SFO
-
LHR
1 stop16h 23m
Delta
Deal found 23/4£470
Sat 2/506:55
LHR
-
SFO
1 stop15h 35m
Lufthansa
Sat 16/519:30
SFO
-
LHR
Nonstop10h 40m
Lufthansa
Deal found 25/4£473
Tue 30/617:45
LHR
-
SFO
1 stop14h 14m
Delta
Tue 21/711:38
SFO
-
LHR
1 stop17h 37m
Delta
Deal found 23/4£476
Wed 6/506:55
LHR
-
SFO
1 stop15h 35m
Lufthansa
Wed 13/516:35
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 25/4£478
Tue 5/507:25
LHR
-
SFO
1 stop15h 05m
Lufthansa
Tue 12/519:30
SFO
-
LHR
Nonstop10h 40m
Lufthansa
Deal found 26/4£479
Tue 22/909:25
LGW
-
SFO
1 stop15h 10m
SWISS
Tue 29/919:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 27/4£498

Find 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 27 April 2026.

Round-trip from

£428

One-way from

£393

Popular in

December

Cheapest in

February

Average price

£495

Good round-trip deal

£550 or less

Good one-way deal

£505 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 28/8-11/9
  • 2 total stops
  • 31h 15m total
  • London to San Francisco
12/6
  • 12/6
  • 1 total stop
  • 30h 50m total
  • London to San Francisco
Highest demand for flights based on searches. 3% potential increase in price (£15 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Average for round-trip flights in April 2026
Price to beat on a round-trip flight from London (LON) to San Francisco.
Price to beat on a one-way flight from London (LON) to San Francisco.

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 858,174 searches. Data last updated 27 April 2026.
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

Cheapest return flight

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 24/9

08:45-16:15

1 stop15h 30m

San Francisco

Thu 1/10

12:35-09:40

1 stop13h 05m

£509

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 15/5

08:40-16:15

1 stop15h 35m

San Francisco

Fri 22/5

06:00-10:10

1 stop20h 10m

£511

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 12/5

08:45-16:25

1 stop15h 40m

San Francisco

Fri 22/5

12:15-10:10

1 stop13h 55m

£511

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 9/5

13:00-16:10

Nonstop11h 10m

San Francisco

Mon 18/5

12:50-07:25

Nonstop10h 35m

£538

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 9/9

19:50-14:40

2 stops26h 50m

San Francisco

Tue 15/9

16:45-18:50

2 stops18h 05m

£548

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 16/10

12:25-20:22

1 stop15h 57m

San Francisco

Wed 4/11

13:35-10:00

1 stop12h 25m

£555

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 9/5

12:45-15:45

Nonstop11h 00m

San Francisco

Sun 10/5

17:55-12:15

Nonstop10h 20m

£560

LondonSan Francisco

LTN - SFO

LTNSFO

London Luton

Thu 25/6

09:25-15:50

1 stop14h 25m

San Francisco

Mon 29/6

17:35-22:50

1 stop21h 15m

£560

LondonSan Francisco

STN - SFO

STNSFO

London Stansted

Fri 12/6

06:35-15:50

1 stop17h 15m

San Francisco

Fri 19/6

17:35-17:35

1 stop16h 00m

£564

LondonSan Francisco

LCY - SFO

LCYSFO

London City

Thu 25/6

08:25-21:50

2 stops21h 25m

San Francisco

Fri 10/7

06:00-07:15

2 stops17h 15m

£570

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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?

To ensure you get the cheapest price possible for a flight from London to San Francisco, you should look to book at least 59 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from London to San Francisco (average of £393). Flying from London to San Francisco in December is currently the most expensive (average of £682). 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 27 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to San Francisco as you normally would.

Weekly flight availability from London to San Francisco

Explore weekly flight availability from London to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 27 April 2026.

The most flights from LON to SFO are scheduled on a Monday (42 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (36 on average).

How much does it cost for a return flight from London to San Francisco?

What’s the top stopover airport for flights from London to San Francisco?

Share of one-stop return flights from London to San Francisco chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 26% of one-stop itineraries from London to San Francisco on Cheapflights.

What’s the cheapest stopover airport for flights from London to San Francisco?

Average return fare for one-stop flights from London to San Francisco, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Zurich (ZRH) is the most affordable one-stop option, with an average return flight price of £367.

What’s the fastest stopover option from London to San Francisco?

Shortest average travel time for one-stop one-way flights from London to San Francisco, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 13h 15m.

Which airport typically offers the quickest stopover for flights from London to San Francisco?

Average stopover duration for one-stop one-way flights from London to San Francisco, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 07m.

How often are flights from London to San Francisco delayed?

About 12% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 147 minutes.

What is the most punctual flight time for London to San Francisco flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Wednesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to San Francisco flights?

Over the past year, United Airlines have had the lowest number of delays on this route, with just 10% of flights being delayed.

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 27 April 2026.
Read reviews from past customers who have flown with Austrian Airlines,United Airlines, andVirgin Atlantic from London to San Francisco. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

6.8

Overall

7.6

Crew

8.1

Food

6.8

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Overall

7.6

Crew

8.1

Food

6.8

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Overall

7.6

Crew

8.1

Food

6.8

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Overall

7.6

Crew

8.1

Food

6.8

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Overall

7.6

Crew

8.1

Food

6.8

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

Entertainment

6.8

Overall

7.6

Crew

8.1

Food

6.8

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

KENNETH,Mar 2026

VIE - EWR

Everything was great, took off on time, arrived on time, boarding was smooth, food and movies were great.

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?

    San Francisco (SFO) is the airport you will fly into if you book a flight from London to San Francisco. You should not have trouble finding flights to San Francisco from London; the airport handles an average of 40 inbound flights from London per day. You should also have plenty of airline options to choose from since 18 airlines have flights to the San Francisco airport from London. It is only a 11.0 mi journey from San Francisco (SFO) to San Francisco’s city center.

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

    There are many flights that can get you from London to San Francisco in 15h 30m. Fly via United Airlines, Virgin Atlantic, or British Airways to get the fastest option. London and San Francisco are separated by a distance of 5350 mi. This flight may include one or multiple stops.

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

    Flying on Delta is currently your cheapest option to San Francisco, with prices starting at £318. Additional return tickets that might be worth considering are offered by Air Canada and British Airways, with the lowest prices starting at £332 and £340, respectively. Delta is priced at 37% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £268. Virgin Atlantic flights start at £321 while deals on JetBlue start at £336 one-way.

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

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

    Consider Air Canada (87%), Austrian Airlines (87%) or United Airlines (87%) when booking your flight. These represent the most reliable airlines when flying from London to San Francisco.

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

    The cheapest flight price from London to San Francisco is £390. On average you can expect to pay £1,156. The most popular route, (London Heathrow - San Francisco), can usually be booked for £423.

  • 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, February is the cheapest month in which you can book a flight from London to San Francisco (average of £393). Flying from London to San Francisco in December is currently the most expensive (average of £682). 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 are the most eco-friendly airlines from London to San Francisco?

    If you are looking for flights to San Francisco from London that are eco-friendly, there are a couple of airlines that we can recommend. The recommended airlines are Brussels Airlines, Finnair, Jetblue and Singapore Airlines. If you choose to fly with Brussels Airlines, you will be flying with an airline that trains its pilots only to use one engine during taxiing and limited flaps while landing. This saves a lot of fuel. The fleet of aircraft for long-haul flights has also been replaced with models consuming 3.1% less fuel. Finnair is another great option for sustainable travel. They plan to cut their carbon emissions by 2025 by 50% from 2019’s level. This airline is also working on sustainable catering. Jetblue uses Airbus A320neos which improve fuel economy by 15%. This airline also uses Sharklets, which are wing tip devices that improve aerodynamics and reduce carbon emissions by 4%. Singapore Airlines is another great airline to fly with for eco-friendly travel. This airline is working on sustainable fuel and regularly replaces its planes with newer models that consume less fuel.

  • How to fly more sustainably from London to San Francisco?

    There are many great ways to travel more sustainably to San Francisco from London. One of the best ways you can do this is by taking a direct flight. Taking a direct flight uses less fuel than taking a flight route with more than one stopover. If you can, you should also fly in economy class. The economy class takes up less room in the aircraft and therefore can hold more passengers. Another great eco-friendly way to travel is by packing light. The lighter you pack, the less fuel the aircraft will use. Flying with an airline that has sustainable travel methods in place is super beneficial for the planet. If you have the option, try to fly with Brussels Airlines, Finnair, Jetblue or Singapore Airlines.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Newark
San Bruno
Bodega Bay
South San Francisco
Sunnyvale

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Fly from London to San Francisco on these airlines

Choose from the following airlines for your flight from London to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 27 April 2026.

Top 10 airlines flying from London to San Francisco

Discover the top 10 airlines that operate flights from London to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 April 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£318Average£663FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£332Average£411FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£340Average£506FlexibilityNo cancel feeOn-time70%
Search British Airways flights
SWISSCheapest£348Average£446FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£349Average£556FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£353Average£487FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£357Average£463FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
FinnairCheapest£360Average£479FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Brussels AirlinesCheapest£369Average£507FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
LufthansaCheapest£371Average£518FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to San Francisco for you. Better yet — we are completely free to use.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to San Francisco flexibly with Cheapflights today.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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