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Cheap flights from San Francisco to London from £271

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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LON
22 Mar — 29 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to London are usually found in January or February, booked 37 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from San Francisco to London

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to London
Explore the most affordable flight options available from San Francisco to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2026.

Tue 17/216:30
SFO
-
LHR
Nonstop10h 20m
KLM
Tue 24/211:40
LHR
-
SFO
Nonstop11h 00m
KLM
Deal found 16/2£443
Mon 23/219:25
SFO
-
LGW
1 stop14h 25m
SWISS
Thu 16/409:25
LGW
-
SFO
1 stop14h 50m
SWISS
Deal found 16/2£444
Mon 2/316:40
SFO
-
LHR
1 stop21h 00m
Scandinavian Airlines
Sat 4/406:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 16/2£444
Tue 24/213:40
SFO
-
LHR
1 stop12h 20m
Delta
Fri 6/306:30
LHR
-
SFO
1 stop13h 20m
Delta
Deal found 18/2£444
Mon 23/216:35
SFO
-
LGW
2 stops56h 50m
TAP AIR PORTUGAL
Thu 26/216:00
LGW
-
SFO
1 stop32h 05m
TAP AIR PORTUGAL
Deal found 17/2£445
Mon 13/408:10
SFO
-
LTN
2 stops22h 10m
Multiple Airlines
Fri 24/405:40
LTN
-
SFO
2 stops23h 50m
Multiple Airlines
Deal found 18/2£445
Mon 23/317:40
SFO
-
LHR
2 stops15h 45m
Scandinavian Airlines
Thu 2/406:40
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Deal found 18/2£445
Mon 2/316:35
SFO
-
LGW
2 stops20h 00m
TAP AIR PORTUGAL
Sun 8/310:40
LGW
-
SFO
1 stop35h 55m
TAP AIR PORTUGAL
Deal found 19/2£446
Wed 25/322:40
SFO
-
LHR
1 stop15h 20m
Lufthansa
Thu 2/406:55
LHR
-
SFO
1 stop20h 05m
Lufthansa
Deal found 17/2£446
Mon 2/316:35
SFO
-
LGW
1 stop15h 10m
TAP AIR PORTUGAL
Mon 23/321:25
LGW
-
SFO
2 stops49h 05m
TAP AIR PORTUGAL
Deal found 19/2£447
Sun 1/316:40
SFO
-
STN
2 stops22h 20m
Multiple Airlines
Sun 8/312:00
STN
-
SFO
2 stops34h 35m
Multiple Airlines
Deal found 17/2£447
Sun 8/317:40
SFO
-
LHR
1 stop15h 20m
Scandinavian Airlines
Thu 19/315:35
LHR
-
SFO
2 stops31h 00m
Scandinavian Airlines
Deal found 18/2£447

Find flight deals from San Francisco to London

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to London (LON). 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 20 February 2026.

Round-trip from

£443

One-way from

£271

Popular in

June

Cheapest in

January

Average price

£489

Good round-trip deal

£490 or less

Good one-way deal

£272 or less
SWISS
  • SWISS
  • 2/3-17/3
  • 2 total stops
  • 29h 55m total
  • San Francisco to London
Search Deals
8/3
  • 8/3
  • 3 total stops
  • 36h 21m total
  • San Francisco to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£87 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from San Francisco to London (LON).
Search Deals
Price to beat on a one-way flight from San Francisco to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to London 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 20 February 2026.
Use the filters below to find and compare flights from San Francisco to London that are best for you.

Fly from

San Francisco

Fly to

London

Route

Depart

Return

Price

San FranciscoLondon

SFO - LGW

SFOLGW

San Francisco

Thu 30/4

19:55-09:45

1 stop29h 50m

London Gatwick

Sun 10/5

21:15-14:35

2 stops49h 20m

£455

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Sun 1/3

12:50-07:25

Nonstop10h 35m

London Heathrow

Thu 19/3

11:10-20:35

1 stop16h 25m

£459

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 16/3

18:25-12:00

Nonstop10h 35m

London Heathrow

Tue 24/3

06:35-20:35

1 stop21h 00m

£459

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 10/8

13:00-07:25

Nonstop10h 25m

London Heathrow

Wed 9/9

06:55-14:30

1 stop15h 35m

£470

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 13/4

12:50-07:25

Nonstop10h 35m

London Heathrow

Fri 24/4

07:25-14:30

1 stop15h 05m

£470

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 18/8

17:55-12:15

Nonstop10h 20m

London Heathrow

Thu 27/8

06:30-11:45

1 stop13h 15m

£471

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 13/4

19:30-14:10

Nonstop10h 40m

London Heathrow

Mon 20/4

16:25-19:00

1 stop34h 35m

£478

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 17/3

17:30-10:50

Nonstop10h 20m

London Heathrow

Tue 24/3

11:40-15:40

Nonstop11h 00m

£479

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 2/3

16:30-10:40

Nonstop10h 10m

London Heathrow

Tue 17/3

11:40-15:40

Nonstop11h 00m

£480

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Mon 9/3

13:50-07:25

Nonstop10h 35m

London Heathrow

Tue 31/3

16:15-19:20

Nonstop11h 05m

£480

Flights are sorted by cheapest return flights first.

Deals found on 16/2

Showing 1-10 of 60 results
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Best time to book a flight from San Francisco to London

Have a flexible travel schedule? Discover the best time to fly to London from San Francisco 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 San Francisco to London

How far ahead should I book a flight from San Francisco to London?

Use this chart to determine the optimal time to book a return flight from San Francisco to London. Price data was last updated on 18 February 2026.

The price you pay for your flight from San Francisco to London may vary depending on when you book. For the best chance of a lower fare, look to book 37 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, October is the cheapest month in which you can book a flight from San Francisco to London (average of £369). Flying from San Francisco to London in June is currently the most expensive (average of £574). 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 SFO to LON?

Find hourly flight availability from San Francisco to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 February 2026.

When flying from San Francisco to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 31% versus a flight at midday.

What is the cheapest day to fly from San Francisco to London?

Use this chart to determine the cheapest time to fly return from San Francisco to London. Price data was last updated on 17 February 2026.

Travellers seeking maximum savings on their San Francisco to London flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from San Francisco to London

Explore weekly flight availability from San Francisco to London. 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 20 February 2026.

The most flights from SFO to LON are scheduled on a Tuesday (31 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (26 on average).

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

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

Copenhagen (CPH) – chosen by Cheapflights users on 36% of one-stop itineraries from San Francisco to London on Cheapflights.

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

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

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £365.

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

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

Flights via Salt Lake City (SLC) have the shortest average one-way travel time for one-stop routes: 12h 32m.

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

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

Flights via Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 11m.

How often are flights from San Francisco to London delayed?

About 11% of weekly flights between San Francisco and London have experienced delays in the past year, with the average delay time being 152 minutes.

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

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

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

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

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

Over the past year, Virgin Atlantic have had the lowest number of delays on this route, with just 9% of flights being delayed.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 20 February 2026.
Read through reviews of airlines operating flights from San Francisco to London, such as Virgin Atlantic, United Airlines, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Comfort

7.3

Food

6.9

Boarding

7.7

Crew

8.2

Overall

7.5

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
679 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Comfort

7.3

Food

6.9

Boarding

7.7

Crew

8.2

Overall

7.5

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,331 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Comfort

7.3

Food

6.9

Boarding

7.7

Crew

8.2

Overall

7.5

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Iberia
7.0
Good
3,118 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Comfort

7.3

Food

6.9

Boarding

7.7

Crew

8.2

Overall

7.5

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,795 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Comfort

7.3

Food

6.9

Boarding

7.7

Crew

8.2

Overall

7.5

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,757 reviews
Virgin Atlantic
7.5
Good
679 reviews
Check prices

Comfort

7.3

Food

6.9

Boarding

7.7

Crew

8.2

Overall

7.5

Entertainment

7.6

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

Find useful and relevant information for your journey from San Francisco to London. 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 from for flights from San Francisco to London?

    Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to London from San Francisco. Booking flights from San Francisco (SFO) to London should be relatively easy as there are 30 daily outbound flights to London from 6 different airlines.

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

    Airlines like TAP AIR PORTUGAL, United Airlines, and KLM fly from San Francisco to London in about 10h 20m. The time it takes to get you to your destination can typically vary by up to 19h 30m. There are 5350 mi between San Francisco and London. This flight may include one or multiple stops.

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

    Our cheapest airline available from San Francisco to London is KLM. Our recent data shows that you can find tickets from as low as £363 on this airline. Additional options worth looking into are Virgin Atlantic and Lufthansa, starting at £367 and £370 round-trip. KLM is currently priced 34% below the average price you’ll pay for this route.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as £244. Users have also found prices from £261 and £264 on Virgin Atlantic and KLM, respectively.

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

    While some choose either San Francisco - London Gatwick or San Francisco - London City, San Francisco - London Heathrow is the most popular route from San Francisco to London.

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

    Before booking your flight to London from San Francisco, check out the most reliable airlines to get you to your destination on time: Air Canada (86%), Austrian Airlines (86%), United Airlines( 86%).

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

    Looking at all options, your cheapest flight can be booked for £162. While the most popular route (San Francisco - London Heathrow) can be booked for £383 on average, our data indicates £1,249 when flying from San Francisco to London.

  • Can I find deals for flights from San Francisco to London that include hotel bookings?

    Yes. In addition to deals on San Francisco to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to London.

  • Can I find deals for business class flights from San Francisco to London?

    Yes. Cheapflights offers flight deals from San Francisco to London 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 San Francisco to London?

    Currently, October is the cheapest month in which you can book a flight from San Francisco to London (average of £369). Flying from San Francisco to London in June is currently the most expensive (average of £574). 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 London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Luton
Croydon
Wembley
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Kingston upon Thames
Eastbourne
Ipswich
Chelmsford
Bedford
Crawley
Romford

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.

Top 6 airlines flying from San Francisco to London

Discover the top 6 airlines that operate flights from San Francisco to London. 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 20 February 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£363Average£544FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£367Average£522FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£370Average£589FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£385Average£508FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£402Average£580FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest£423Average£565FlexibilityNo cancel feeOn-time77%
Search Iberia 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 San Francisco to London?

When you search for this flight from San Francisco to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

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 London from San Francisco.

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

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

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