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Cheap flights from London to San Francisco from ₹ 43,278

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 22/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
17 Feb — 24 Feb1
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

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 18 January 2026.

Round-trip from

₹ 47,171

One-way from

₹ 43,278

Popular in

July

Cheapest in

February

Average price

₹ 59,394

Good round-trip deal

₹ 48,662 or less
United Airlines
  • United Airlines
  • 22/2-2/3
  • 1 total stop
  • 26h 32m total
  • London to San Francisco
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SWISS
  • SWISS
  • 22/3
  • 2 total stops
  • 29h 00m total
  • London to San Francisco
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Highest demand for flights based on searches. 13% potential increase in price (₹ 829,239 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (₹ 136,547 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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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

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 18 January 2026.

Sun 22/213:25
LHR
-
SFO
1 stop15h 57m
United Airlines
Mon 2/312:50
SFO
-
LHR
Nonstop10h 35m
United Airlines
Deal found 17/1₹ 47,171
Fri 6/211:35
LHR
-
SFO
2 stops16h 32m
United Airlines
Thu 12/213:20
SFO
-
LHR
1 stop14h 30m
United Airlines
Deal found 18/1₹ 47,352
Wed 18/211:35
LHR
-
SFO
2 stops16h 35m
United Airlines
Thu 26/207:00
SFO
-
LHR
1 stop15h 20m
United Airlines
Deal found 16/1₹ 47,443
Thu 21/508:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Wed 27/513:00
SFO
-
LHR
Nonstop10h 25m
United Airlines
Deal found 18/1₹ 47,533
Sat 7/311:35
LHR
-
SFO
2 stops16h 35m
United Airlines
Sat 14/322:40
SFO
-
LHR
1 stop15h 20m
United Airlines
Deal found 18/1₹ 47,714
Sat 12/906:55
LHR
-
SFO
1 stop20h 05m
United Airlines
Sat 26/906:30
SFO
-
LHR
1 stop19h 10m
United Airlines
Deal found 17/1₹ 47,805
Sat 24/106:00
LHR
-
SFO
1 stop18h 30m
SWISS
Fri 30/119:25
SFO
-
LHR
2 stops28h 50m
SWISS
Deal found 17/1₹ 47,895
Wed 20/509:00
LHR
-
SFO
1 stop18h 00m
United Airlines
Wed 27/510:25
SFO
-
LHR
1 stop15h 45m
United Airlines
Deal found 18/1₹ 47,986
Sat 24/117:25
LHR
-
SFO
2 stops31h 05m
SWISS
Wed 18/219:25
SFO
-
LHR
1 stop14h 25m
SWISS
Deal found 17/1₹ 48,077
Tue 7/406:30
LHR
-
SFO
1 stop14h 10m
Lufthansa
Thu 16/416:35
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 18/1₹ 48,167
Mon 13/416:15
LHR
-
SFO
Nonstop11h 05m
Lufthansa
Tue 21/412:35
SFO
-
LHR
1 stop14h 05m
Lufthansa
Deal found 17/1₹ 48,258
Tue 14/407:20
LGW
-
SFO
1 stop18h 35m
LEVEL
Tue 21/419:40
SFO
-
LGW
1 stop29h 20m
LEVEL
Deal found 17/1₹ 49,435

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 18 January 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

Mon 2/2

11:35-20:07

2 stops16h 32m

San Francisco

Thu 26/2

16:15-13:30

1 stop13h 15m

₹ 47,352

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 26/5

06:55-14:20

1 stop15h 25m

San Francisco

Sat 30/5

22:35-06:55

1 stop24h 20m

₹ 47,986

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 20/5

09:00-19:00

1 stop18h 00m

San Francisco

Wed 27/5

10:25-10:10

1 stop15h 45m

₹ 47,986

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 18/2

13:45-17:00

Nonstop11h 15m

San Francisco

Wed 15/4

16:35-11:10

Nonstop10h 35m

₹ 48,167

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 12/5

13:00-16:10

Nonstop11h 10m

San Francisco

Tue 19/5

19:40-14:10

Nonstop10h 30m

₹ 48,258

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 1/5

16:15-19:20

Nonstop11h 05m

San Francisco

Sun 17/5

19:40-14:10

Nonstop10h 30m

₹ 48,258

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 20/5

06:55-14:35

1 stop15h 40m

San Francisco

Wed 10/6

16:30-06:35

1 stop30h 05m

₹ 48,801

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 6/2

11:35-20:07

2 stops16h 32m

San Francisco

Fri 13/2

13:35-11:15

1 stop13h 40m

₹ 48,891

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 14/2

15:20-23:04

1 stop15h 44m

San Francisco

Sat 21/2

06:45-05:55

1 stop15h 10m

₹ 48,891

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 7/4

10:35-13:40

Nonstop11h 05m

San Francisco

Fri 17/4

19:30-14:10

Nonstop10h 40m

₹ 50,974

Flights are sorted by cheapest return flights first.

Deals found on 17/1

Showing 1-10 of 40 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 16 January 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 ₹ 43,097). Flying from London to San Francisco in July is currently the most expensive (average of ₹ 53,871). 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 18 January 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 18 January 2026.

The most flights from LON to SFO are scheduled on a Monday (31 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (25 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 13% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 141 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 Sunday 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 11% 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 18 January 2026.
Read through reviews of airlines operating flights from London to San Francisco, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,174 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
United Airlines
7.4
Good
9,174 reviews
United Airlines
7.4
Good
9,174 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

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. 1 airline 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 29 inbound flights from London per day.

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

    Airlines like United Airlines, TAP AIR PORTUGAL, and Air Transat fly from London to San Francisco in about 16h 32m. The time it takes to get you to your destination can typically vary by up to 32h 33m. 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(82%), Air France(82%) or Delta(82%), as they are the most reliable in getting you off to your destination on time.

  • 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 ₹ 48,737, our data indicates the cheapest price to be ₹ 48,662. The most popular route (London Heathrow - San Francisco), is priced around ₹ 51,698.

  • 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, February is the cheapest month in which you can book a flight from London to San Francisco (average of ₹ 43,097). Flying from London to San Francisco in July is currently the most expensive (average of ₹ 53,871). 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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