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
Return
1 adult
Economy
Return
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
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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
Best flights from London to San Francisco
Discover carefully curated flight deals from London to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 April 2026.
Thu 24/908:45
LHR
-
SFO
1 stop15h 30m
United Airlines
Thu 1/1012:35
SFO
-
LHR
1 stop13h 05m
United Airlines
Deal found 23/4£509
Sat 9/513:00
LHR
-
SFO
Nonstop11h 10m
Multiple Airlines
Mon 18/512:50
SFO
-
LHR
Nonstop10h 35m
Multiple Airlines
Deal found 23/4£538
Wed 9/919:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Tue 15/916:45
SFO
-
LHR
2 stops18h 05m
Scandinavian Airlines
Deal found 27/4£548
Fri 16/1012:25
LHR
-
SFO
1 stop15h 57m
KLM
Wed 4/1113:35
SFO
-
LHR
1 stop12h 25m
KLM
Deal found 26/4£555
Sat 9/512:45
LHR
-
SFO
Nonstop11h 00m
Delta
Sun 10/517:55
SFO
-
LHR
Nonstop10h 20m
Delta
Deal found 25/4£560
Thu 25/608:25
LCY
-
SFO
2 stops21h 25m
Virgin Atlantic
Fri 10/706:00
SFO
-
LCY
2 stops17h 15m
Virgin Atlantic
Deal found 26/4£570
Wed 19/807:00
LCY
-
SFO
2 stops25h 59m
British Airways
Tue 15/921:24
SFO
-
LCY
2 stops27h 46m
British Airways
Deal found 23/4£571
Sat 29/821:15
LGW
-
SFO
2 stops48h 50m
TAP AIR PORTUGAL
Sat 12/919:35
SFO
-
LGW
1 stop30h 10m
TAP AIR PORTUGAL
Deal found 24/4£577
Sun 18/1012:40
LGW
-
SFO
1 stop31h 40m
Air Transat
Sat 31/1013:40
SFO
-
LGW
1 stop37h 05m
Air Transat
Deal found 26/4£602
Mon 21/909:25
LGW
-
SFO
1 stop15h 10m
SWISS
Mon 5/1014:40
SFO
-
LGW
2 stops19h 10m
SWISS
Deal found 27/4£641
Tue 23/612:20
LGW
-
SFO
1 stop20h 11m
JetBlue
Tue 14/710:25
SFO
-
LGW
1 stop15h 10m
JetBlue
Deal found 27/4£776
Sun 30/819:35
LGW
-
SFO
1 stop26h 55m
Condor
Fri 4/916:30
SFO
-
LGW
1 stop14h 10m
Condor
Deal found 23/4£785
Tue 9/617:35
STN
-
SFO
1 stop31h 05m
Turkish Airlines
Wed 17/612:55
SFO
-
STN
1 stop37h 00m
Turkish Airlines
Deal found 26/4£810
Fri 15/508:40
LHR
-
SFO
1 stop15h 35m
United Airlines
Fri 22/506:00
SFO
-
LHR
1 stop20h 10m
United Airlines
Deal found 25/4£511
Thu 25/609:25
LTN
-
SFO
1 stop14h 25m
Multiple Airlines
Mon 29/617:35
SFO
-
LTN
1 stop21h 15m
Multiple Airlines
Deal found 24/4£560
Tue 12/508:45
LHR
-
SFO
1 stop15h 40m
United Airlines
Fri 22/512:15
SFO
-
LHR
1 stop13h 55m
United Airlines
Deal found 27/4£511
Thu 25/617:50
LCY
-
SFO
1 stop25h 55m
Virgin Atlantic
Sun 16/806:00
SFO
-
LCY
2 stops17h 15m
Virgin Atlantic
Deal found 25/4£574
Mon 19/1009:20
LCY
-
SFO
2 stops18h 58m
Delta
Sun 1/1113:50
SFO
-
LCY
1 stop18h 45m
Delta
Deal found 26/4£581
Fri 28/821:15
LGW
-
SFO
2 stops28h 20m
TAP AIR PORTUGAL
Sat 12/919:35
SFO
-
LGW
1 stop30h 10m
TAP AIR PORTUGAL
Deal found 23/4£597
Wed 17/618:30
LHR
-
SFO
Nonstop10h 55m
KLM
Wed 24/617:45
SFO
-
LHR
Nonstop10h 20m
KLM
Deal found 27/4£603
Fri 12/606:35
STN
-
SFO
1 stop17h 15m
Multiple Airlines
Fri 19/617:35
SFO
-
STN
1 stop16h 00m
Multiple Airlines
Deal found 27/4£564
Fri 8/519:00
LCY
-
SFO
1 stop24h 45m
Virgin Atlantic
Mon 11/505:50
SFO
-
LCY
2 stops18h 05m
Virgin Atlantic
Deal found 24/4£574
Tue 26/521:05
LHR
-
SFO
2 stops25h 35m
Scandinavian Airlines
Tue 2/607:05
SFO
-
LHR
2 stops18h 15m
Scandinavian Airlines
Deal found 24/4£645
Fri 15/509:15
LCY
-
SFO
1 stop15h 00m
SWISS
Fri 22/519:35
SFO
-
LCY
1 stop34h 10m
SWISS
Deal found 27/4£648
Fri 21/809:20
LCY
-
SFO
1 stop34h 25m
Delta
Mon 14/913:45
SFO
-
LCY
1 stop34h 10m
Delta
Deal found 23/4£590
Thu 25/608:25
LCY
-
SFO
2 stops21h 25m
Virgin Atlantic
Thu 16/713:45
SFO
-
LCY
1 stop20h 45m
Virgin Atlantic
Deal found 27/4£576
Mon 18/518:05
LTN
-
SFO
2 stops28h 25m
Multiple Airlines
Mon 25/516:30
SFO
-
LTN
2 stops22h 30m
Multiple Airlines
Deal found 26/4£594
Fri 5/618:25
LHR
-
SFO
Nonstop10h 55m
Delta
Wed 10/613:20
SFO
-
LHR
1 stop12h 40m
Delta
Deal found 27/4£599
Tue 23/612:20
LGW
-
SFO
1 stop20h 11m
JetBlue
Mon 13/711:26
SFO
-
LGW
1 stop14h 09m
JetBlue
Deal found 27/4£793
Fri 29/518:35
LGW
-
SFO
1 stop29h 40m
SWISS
Tue 16/619:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 27/4£741
Direct flights from London to San Francisco
Explore direct flight options from London to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 27 April 2026.
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
Tue 30/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Mon 20/719:30
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£478
Wed 1/714:20
LHR
-
SFO
Nonstop11h 10m
British Airways
Wed 22/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£479
Fri 26/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Fri 3/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 24/4£481
Sun 28/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Thu 16/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£488
Sun 10/514:30
LHR
-
SFO
Nonstop11h 10m
British Airways
Mon 18/516:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£492
Fri 28/810:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Fri 11/916:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 24/4£495
Tue 30/614:30
LHR
-
SFO
Nonstop11h 10m
British Airways
Wed 22/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£497
Tue 30/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Sat 18/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£498
Tue 30/610:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Sun 19/716:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 23/4£499
Sun 10/510:35
LHR
-
SFO
Nonstop11h 05m
Lufthansa
Sun 17/519:30
SFO
-
LHR
Nonstop10h 40m
Lufthansa
Deal found 24/4£501
Fri 8/513:00
LHR
-
SFO
Nonstop11h 10m
Lufthansa
Sat 16/516:35
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 25/4£502
Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 27 April 2026 and is based on user searches.
Thu 30/406:30
STN
-
SFO
1 stop17h 20m
Multiple Airlines
Wed 13/517:40
SFO
-
STN
1 stop21h 40m
Multiple Airlines
Deal found 23/4£509
Sat 2/506:55
LHR
-
SFO
1 stop15h 35m
Lufthansa
Sat 16/519:30
SFO
-
LHR
Nonstop10h 40m
Lufthansa
Deal found 25/4£473
Mon 4/506:55
LHR
-
SFO
1 stop15h 35m
Multiple Airlines
Mon 11/519:35
SFO
-
LHR
1 stop14h 15m
Multiple Airlines
Deal found 26/4£480
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 5/506:55
LHR
-
SFO
1 stop15h 35m
Lufthansa
Sun 17/521:05
SFO
-
LHR
1 stop14h 35m
Lufthansa
Deal found 24/4£481
Wed 6/506:55
LHR
-
SFO
1 stop15h 35m
Lufthansa
Wed 13/516:35
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 25/4£478
Wed 6/507:25
LHR
-
SFO
1 stop15h 05m
Lufthansa
Fri 15/521:05
SFO
-
LHR
1 stop14h 35m
Lufthansa
Deal found 27/4£483
Wed 6/509:25
LGW
-
SFO
1 stop14h 50m
SWISS
Wed 13/519:35
SFO
-
LGW
1 stop14h 20m
SWISS
Deal found 23/4£509
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 27/512:20
LGW
-
SFO
1 stop18h 29m
JetBlue
Tue 9/612:03
SFO
-
LGW
1 stop13h 32m
JetBlue
Deal found 23/4£516
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
One-way flights from London to San Francisco
Search for one-way flight options from London to San Francisco. Find affordable one-way fares based on user searches. Data last updated 27 April 2026.
Fri 12/615:00
LHR
-
SFO
1 stop30h 50m
Multiple Airlines
Deal found 23/4£393
Fri 8/518:10
LTN
-
SFO
3 stops31h 25m
Multiple Airlines
Deal found 22/4£394
Fri 15/518:10
LTN
-
SFO
3 stops31h 25m
Multiple Airlines
Deal found 22/4£394
Fri 8/511:20
SEN
-
SFO
1 stop17h 30m
Multiple Airlines
Deal found 22/4£396
Thu 7/516:15
LTN
-
SFO
1 stop36h 35m
Multiple Airlines
Deal found 24/4£399
Thu 17/908:45
LHR
-
SFO
1 stop15h 30m
SWISS
Deal found 26/4£399
Tue 22/921:35
LGW
-
SFO
3 stops32h 20m
Multiple Airlines
Deal found 25/4£399
Fri 22/506:35
STN
-
SFO
3 stops24h 31m
Multiple Airlines
Deal found 22/4£399
Sun 10/507:25
SEN
-
SFO
3 stops42h 35m
Multiple Airlines
Deal found 24/4£399
Tue 6/1019:15
LCY
-
SFO
1 stop29h 00m
SWISS
Deal found 26/4£399
Wed 17/618:10
LHR
-
SFO
2 stops50h 10m
Multiple Airlines
Deal found 24/4£399
Thu 7/505:40
LGW
-
SFO
3 stops24h 15m
Multiple Airlines
Deal found 23/4£399
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.
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
1
2
3
...
6
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.
LON-SFO
SEN-SFO
STN-SFO
LHR-SFO
LGW-SFO
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
LON-SFO
SEN-SFO
STN-SFO
LHR-SFO
LGW-SFO
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.
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?
When deciding which route to take from London to San Francisco consider London Heathrow - San Francisco, London Gatwick - San Francisco or London Stansted - San Francisco as they are the most popular.
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 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.
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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.
Explore flights to San Francisco departing from other origins. 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.
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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