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Cheap flights from London to San Francisco from ₹ 43,081

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
21 Mar — 28 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 Wednesday or Thursday and return on a Thursday

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 19 February 2026.

Fri 20/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Tue 7/416:35
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 19/2₹ 45,167
Wed 15/408:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Fri 24/412:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 18/2₹ 45,258
Wed 25/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Sat 4/413:20
SFO
-
LHR
1 stop16h 00m
United Airlines
Deal found 16/2₹ 45,348
Tue 24/218:40
LGW
-
SFO
1 stop29h 50m
SWISS
Tue 3/319:25
SFO
-
LGW
1 stop14h 25m
SWISS
Deal found 16/2₹ 45,348
Wed 25/309:00
LHR
-
SFO
1 stop15h 30m
United Airlines
Fri 3/418:00
SFO
-
LHR
1 stop35h 20m
United Airlines
Deal found 16/2₹ 45,439
Thu 16/413:30
LHR
-
SFO
1 stop14h 30m
Multiple Airlines
Sun 19/412:50
SFO
-
LHR
Nonstop10h 35m
Multiple Airlines
Deal found 18/2₹ 45,530
Sun 15/307:50
LHR
-
SFO
1 stop16h 45m
British Airways
Tue 31/316:59
SFO
-
LHR
1 stop14h 06m
British Airways
Deal found 18/2₹ 45,620
Tue 28/407:25
LHR
-
SFO
1 stop15h 05m
United Airlines
Sat 9/512:00
SFO
-
LHR
1 stop13h 40m
United Airlines
Deal found 16/2₹ 45,711
Mon 23/307:40
LHR
-
SFO
1 stop19h 55m
United Airlines
Thu 2/406:40
SFO
-
LHR
1 stop19h 00m
United Airlines
Deal found 16/2₹ 45,802
Thu 16/406:30
LHR
-
SFO
1 stop14h 10m
Lufthansa
Thu 30/412:50
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 16/2₹ 45,892
Mon 27/408:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Mon 8/622:35
SFO
-
LHR
1 stop24h 20m
United Airlines
Deal found 17/2₹ 45,983
Wed 1/407:25
LHR
-
SFO
1 stop15h 05m
United Airlines
Mon 20/419:30
SFO
-
LHR
Nonstop10h 40m
United Airlines
Deal found 19/2₹ 46,074

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 19 February 2026.

Round-trip from

₹ 45,258

One-way from

₹ 43,081

Popular in

July

Cheapest in

February

Average price

₹ 51,153
United Airlines
  • United Airlines
  • 15/4-24/4
  • 1 total stop
  • 26h 10m total
  • London to San Francisco
Search Deals
LEVEL
  • LEVEL
  • 15/6
  • 1 total stop
  • 29h 10m total
  • London to San Francisco
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (₹ 761,452 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (₹ 131,909 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 454,620 searches. Data last updated 19 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

Wed 29/4

08:40-16:15

1 stop15h 35m

San Francisco

Wed 6/5

16:35-11:10

Nonstop10h 35m

₹ 45,258

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 14/4

12:10-16:15

1 stop36h 05m

San Francisco

Thu 30/4

19:40-14:10

Nonstop10h 30m

₹ 45,348

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 13/4

06:55-14:30

1 stop15h 35m

San Francisco

Mon 20/4

16:35-11:10

Nonstop10h 35m

₹ 45,348

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 22/3

13:50-20:35

1 stop37h 45m

San Francisco

Sun 29/3

12:50-07:25

Nonstop10h 35m

₹ 45,620

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 23/3

07:40-20:35

1 stop19h 55m

San Francisco

Wed 1/4

16:35-11:10

Nonstop10h 35m

₹ 45,711

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 28/4

07:25-14:30

1 stop15h 05m

San Francisco

Wed 6/5

11:10-09:40

1 stop14h 30m

₹ 45,711

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 19/4

07:25-14:30

1 stop15h 05m

San Francisco

Tue 28/4

10:10-10:10

1 stop16h 00m

₹ 45,711

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 20/4

07:25-14:30

1 stop15h 05m

San Francisco

Wed 29/4

21:15-20:40

1 stop15h 25m

₹ 45,711

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 4/3

09:00-16:30

1 stop15h 30m

San Francisco

Sat 21/3

08:25-07:10

1 stop15h 45m

₹ 45,802

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 20/5

08:40-16:15

1 stop15h 35m

San Francisco

Wed 27/5

16:45-11:10

Nonstop10h 25m

₹ 46,527

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 38 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 18 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 ₹ 42,174). Flying from London to San Francisco in July is currently the most expensive (average of ₹ 53,964). 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 19 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 19 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?

How often are flights from London to San Francisco delayed?

About 11% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 148 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.

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), located 19.0 km from the city centre, is the airport you fly into when you book flights from London to San Francisco. 0 airlines have flights to San Francisco from London on a regular basis. Booking flights from London to San Francisco should not be difficult; the airport handles an average of 31 inbound flights from London per day.

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

    Airlines like United Airlines, British Airways, and SWISS fly from London to San Francisco in about 15h 35m. The time it takes to get you to your destination can typically vary by up to 14h 15m. The distance from London to San Francisco is about 8610 km. Both multi-stop and direct flights can be found to your destination and back.

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

    No one likes to see their flight delayed. When booking a flight from London to San Francisco consider choosing KLM(79%), Air France(79%) or Delta(79%), as they are the most reliable in getting you off to your destination on time.

  • 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 ₹ 42,174). Flying from London to San Francisco in July is currently the most expensive (average of ₹ 53,964). 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
San Bruno
Fairfield
Mountain View
Burlingame
Milpitas
Santa Clara

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to San Francisco 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?

Deals for London to San Francisco flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to San Francisco.

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?

Of course! You can now track prices for flights from London to San Francisco and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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