Cheap flights from London to San Francisco from £354

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
14 Mar — 21 Mar1
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 Wednesday

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 12 February 2026.

Wed 15/408:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Thu 30/412:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 9/2£365
Thu 9/409:25
LGW
-
SFO
1 stop14h 50m
SWISS
Sun 10/519:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 10/2£366
Sat 28/209:00
LHR
-
SFO
1 stop15h 30m
Multiple Airlines
Wed 1/412:50
SFO
-
LHR
Nonstop10h 35m
Multiple Airlines
Deal found 10/2£367
Thu 19/209:15
LCY
-
SFO
1 stop15h 15m
SWISS
Wed 4/319:25
SFO
-
LCY
1 stop13h 40m
SWISS
Deal found 11/2£367
Tue 22/908:45
LHR
-
SFO
2 stops17h 56m
Air Canada
Tue 29/911:10
SFO
-
LHR
1 stop14h 50m
Air Canada
Deal found 10/2£368
Wed 15/418:35
LGW
-
SFO
1 stop29h 40m
SWISS
Thu 30/414:00
SFO
-
LGW
1 stop19h 50m
SWISS
Deal found 11/2£368
Sat 18/407:25
LHR
-
SFO
1 stop15h 05m
United Airlines
Fri 24/405:00
SFO
-
LHR
1 stop20h 40m
United Airlines
Deal found 9/2£368
Thu 26/218:40
LGW
-
SFO
1 stop29h 50m
SWISS
Sun 1/319:25
SFO
-
LGW
1 stop14h 25m
SWISS
Deal found 9/2£368
Wed 22/406:30
LHR
-
SFO
1 stop14h 10m
Multiple Airlines
Tue 28/412:50
SFO
-
LHR
Nonstop10h 35m
Multiple Airlines
Deal found 9/2£369
Mon 20/406:30
LHR
-
SFO
1 stop14h 10m
Multiple Airlines
Tue 28/419:30
SFO
-
LHR
Nonstop10h 40m
Multiple Airlines
Deal found 10/2£370
Mon 9/318:40
LGW
-
SFO
1 stop29h 50m
SWISS
Mon 16/320:25
SFO
-
LGW
1 stop14h 25m
SWISS
Deal found 9/2£370
Thu 22/1008:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Wed 4/1113:55
SFO
-
LHR
1 stop15h 35m
United Airlines
Deal found 9/2£370

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 12 February 2026.

Round-trip from

£365

One-way from

£354

Popular in

July

Cheapest in

February

Average price

£413

Good round-trip deal

£406 or less

Good one-way deal

£450 or less
United Airlines
  • United Airlines
  • 15/4-30/4
  • 1 total stop
  • 26h 10m total
  • London to San Francisco
12/3
  • 12/3
  • 3 total stops
  • 32h 35m total
  • London to San Francisco
Highest demand for flights based on searches. 12% potential increase in price (£50 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for round-trip flights in February 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 12 February 2026.
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

Tue 12/5

08:45-16:25

1 stop15h 40m

San Francisco

Tue 19/5

19:40-14:10

Nonstop10h 30m

£365

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 8/4

08:40-16:15

1 stop15h 35m

San Francisco

Mon 20/4

12:50-07:25

Nonstop10h 35m

£365

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 15/4

08:40-16:15

1 stop15h 35m

San Francisco

Fri 8/5

22:35-06:55

1 stop24h 20m

£365

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 15/4

08:40-16:15

1 stop15h 35m

San Francisco

Fri 24/4

16:35-11:10

Nonstop10h 35m

£365

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 23/3

07:40-20:35

1 stop19h 55m

San Francisco

Sat 4/4

13:20-13:20

1 stop16h 00m

£367

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 11/5

06:55-14:30

1 stop15h 35m

San Francisco

Mon 18/5

22:35-06:55

1 stop24h 20m

£368

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 13/4

07:25-14:30

1 stop15h 05m

San Francisco

Fri 8/5

16:35-11:10

Nonstop10h 35m

£368

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 13/4

07:25-14:30

1 stop15h 05m

San Francisco

Thu 30/4

12:05-10:10

1 stop14h 05m

£368

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 20/4

06:30-12:40

1 stop14h 10m

San Francisco

Tue 28/4

13:50-11:45

1 stop13h 55m

£369

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 20/4

06:30-12:40

1 stop14h 10m

San Francisco

Mon 27/4

19:30-14:10

Nonstop10h 40m

£370

Flights are sorted by cheapest return flights first.

Deals found on 11/2

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 6 February 2026.

To ensure you get the cheapest price possible for a flight from London to San Francisco, you should look to book at least 51 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 £339). Flying from London to San Francisco in July is currently the most expensive (average of £436). 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 12 February 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 12 February 2026.

The most flights from LON to SFO are scheduled on a Monday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (31 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.

Copenhagen (CPH) – chosen by Cheapflights users on 31% 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.

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £382.

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, Virgin Atlantic 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 12 February 2026.
Read reviews from past customers who have flown with Austrian Airlines, Virgin Atlantic, andUnited Airlines 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.

Comfort

7.3

Overall

7.5

Food

6.8

Boarding

7.6

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Overall

7.5

Food

6.8

Boarding

7.6

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Overall

7.5

Food

6.8

Boarding

7.6

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Overall

7.5

Food

6.8

Boarding

7.6

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Overall

7.5

Food

6.8

Boarding

7.6

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

Comfort

7.3

Overall

7.5

Food

6.8

Boarding

7.6

Entertainment

6.8

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

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 31 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 11.8 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. Fly via United Airlines, SWISS, or Virgin Atlantic to get the fastest option. London and San Francisco are separated by a distance of 5374 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 £233. Additional return tickets that might be worth considering are offered by Air Canada and United Airlines, with the lowest prices starting at £330 and £341, respectively. Delta is priced at 52% 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 £266. WestJet flights start at £295 while deals on Scandinavian Airlines start at £298 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 KLM (82%), Air France (82%) or Delta (82%) 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 £336. On average you can expect to pay £1,934. The most popular route, (London Heathrow - San Francisco), can usually be booked for £279.

  • 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 £339). Flying from London to San Francisco in July is currently the most expensive (average of £436). 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
Pacific Grove

Browse thousands of different options on Cheapflights for your next trip

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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 12 February 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 12 February 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£233Average£561FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£330Average£471FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£341Average£502FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
SWISSCheapest£345Average£432FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£346Average£545FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£351Average£525FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£353Average£450FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Brussels AirlinesCheapest£366Average£465FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
FinnairCheapest£366Average£458FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£368Average£491FlexibilityNo cancel feeOn-time70%
Search British Airways 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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