Cheap flights from London to San Francisco from £453
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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SFO
21 Jul — 28 Jul1
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 Wednesday or Thursday and return on a Wednesday
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 21 June 2026.
Wed 2/909:15
LCY
-
SFO
1 stop15h 15m
SWISS
Wed 16/919:35
SFO
-
LCY
1 stop15h 05m
SWISS
Deal found 19/6£487
Tue 30/617:40
LHR
-
SFO
2 stops25h 41m
Air Canada
Mon 6/713:25
SFO
-
LHR
1 stop33h 10m
Air Canada
Deal found 19/6£488
Wed 9/909:25
LGW
-
SFO
1 stop14h 50m
SWISS
Wed 23/919:35
SFO
-
LGW
1 stop14h 15m
SWISS
Deal found 21/6£488
Thu 3/1211:40
LHR
-
SFO
Nonstop11h 00m
Delta
Tue 29/1206:15
SFO
-
LHR
1 stop16h 50m
Delta
Deal found 19/6£489
Sat 27/609:15
LHR
-
SFO
1 stop19h 35m
British Airways
Wed 1/711:37
SFO
-
LHR
1 stop17h 08m
British Airways
Deal found 20/6£489
Wed 2/910:25
LGW
-
SFO
2 stops19h 50m
Virgin Atlantic
Wed 16/914:00
SFO
-
LGW
2 stops18h 00m
Virgin Atlantic
Deal found 19/6£489
Tue 14/709:15
LHR
-
SFO
1 stop23h 44m
British Airways
Sun 2/812:30
SFO
-
LHR
1 stop16h 20m
British Airways
Deal found 19/6£490
Tue 8/910:35
LGW
-
SFO
1 stop15h 25m
Virgin Atlantic
Wed 16/914:00
SFO
-
LGW
2 stops18h 00m
Virgin Atlantic
Deal found 19/6£490
Mon 29/609:15
LHR
-
SFO
1 stop18h 45m
American Airlines
Sun 12/719:30
SFO
-
LHR
Nonstop10h 25m
American Airlines
Deal found 21/6£491
Thu 9/708:00
LHR
-
SFO
1 stop17h 19m
Lufthansa
Sun 26/708:10
SFO
-
LHR
1 stop17h 50m
Lufthansa
Deal found 20/6£492
Thu 27/814:10
LHR
-
SFO
2 stops18h 06m
Multiple Airlines
Tue 8/906:00
SFO
-
LHR
2 stops16h 30m
Multiple Airlines
Deal found 18/6£492
Sun 22/1116:45
LGW
-
SFO
2 stops27h 37m
Virgin Atlantic
Sun 29/1115:40
SFO
-
LGW
1 stop16h 05m
Virgin Atlantic
Deal found 19/6£492
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 21 June 2026.
Wed 14/1006:45
LCY
-
SFO
1 stop17h 10m
British Airways
Sun 18/1017:40
SFO
-
LCY
1 stop19h 05m
British Airways
Deal found 20/6£503
Tue 22/909:20
LCY
-
SFO
2 stops18h 58m
Virgin Atlantic
Tue 29/906:00
SFO
-
LCY
2 stops17h 55m
Virgin Atlantic
Deal found 20/6£535
Mon 7/921:05
LHR
-
SFO
2 stops25h 35m
Scandinavian Airlines
Mon 21/916:45
SFO
-
LHR
2 stops15h 40m
Scandinavian Airlines
Deal found 20/6£560
Wed 9/916:25
LGW
-
SFO
1 stop30h 05m
TAP AIR PORTUGAL
Tue 15/919:20
SFO
-
LGW
3 stops41h 10m
TAP AIR PORTUGAL
Deal found 17/6£563
Wed 1/709:25
LGW
-
SFO
1 stop14h 50m
SWISS
Mon 1/219:25
SFO
-
LGW
1 stop14h 25m
SWISS
Deal found 16/6£571
Wed 8/717:00
LHR
-
SFO
1 stop13h 55m
Alaska Airlines
Mon 26/1016:18
SFO
-
LHR
1 stop13h 02m
Alaska Airlines
Deal found 18/6£594
Wed 12/808:40
LHR
-
SFO
1 stop15h 55m
United Airlines
Mon 17/819:50
SFO
-
LHR
Nonstop10h 20m
United Airlines
Deal found 17/6£628
Wed 1/718:30
LHR
-
SFO
Nonstop10h 55m
KLM
Wed 8/717:55
SFO
-
LHR
Nonstop10h 20m
KLM
Deal found 20/6£678
Tue 18/816:10
LTN
-
SFO
2 stops30h 30m
Multiple Airlines
Wed 2/916:45
SFO
-
LTN
2 stops20h 30m
Multiple Airlines
Deal found 18/6£734
Tue 10/1117:20
STN
-
SFO
1 stop31h 10m
Turkish Airlines
Sat 28/1118:35
SFO
-
STN
1 stop31h 20m
Turkish Airlines
Deal found 17/6£763
Fri 4/910:00
LCY
-
SFO
2 stops19h 02m
Virgin Atlantic
Sun 20/906:00
SFO
-
LCY
2 stops17h 55m
Virgin Atlantic
Deal found 16/6£542
Wed 9/919:50
LHR
-
SFO
2 stops26h 50m
Scandinavian Airlines
Tue 15/916:45
SFO
-
LHR
2 stops15h 40m
Scandinavian Airlines
Deal found 17/6£566
Mon 7/921:15
LGW
-
SFO
2 stops49h 20m
TAP AIR PORTUGAL
Mon 21/916:30
SFO
-
LGW
2 stops34h 50m
TAP AIR PORTUGAL
Deal found 19/6£569
Fri 18/909:25
LGW
-
SFO
1 stop14h 50m
SWISS
Fri 25/914:40
SFO
-
LGW
2 stops19h 10m
SWISS
Deal found 19/6£596
Sun 5/709:15
LHR
-
SFO
1 stop23h 44m
British Airways
Thu 17/1212:41
SFO
-
LHR
1 stop15h 34m
British Airways
Deal found 19/6£630
Thu 23/716:00
LHR
-
SFO
2 stops24h 40m
United Airlines
Sun 2/812:15
SFO
-
LHR
1 stop13h 55m
United Airlines
Deal found 19/6£631
Wed 8/709:25
LGW
-
SFO
1 stop14h 50m
SWISS
Wed 15/714:40
SFO
-
LGW
2 stops19h 10m
SWISS
Deal found 20/6£598
Wed 28/1009:35
LGW
-
SFO
2 stops62h 30m
TAP AIR PORTUGAL
Sat 7/1116:35
SFO
-
LGW
2 stops33h 30m
TAP AIR PORTUGAL
Deal found 20/6£611
Mon 20/714:50
LHR
-
SFO
1 stop24h 03m
United Airlines
Mon 27/713:00
SFO
-
LHR
Nonstop10h 25m
United Airlines
Deal found 20/6£667
Wed 12/820:05
LHR
-
SFO
1 stop28h 30m
SWISS
Wed 19/819:35
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 19/6£607
Sat 19/906:00
LTN
-
SFO
2 stops16h 40m
Multiple Airlines
Sat 26/916:45
SFO
-
LTN
3 stops21h 05m
Multiple Airlines
Deal found 20/6£750
Fri 6/1110:55
STN
-
SFO
1 stop38h 35m
Turkish Airlines
Fri 13/1118:35
SFO
-
STN
1 stop37h 45m
Turkish Airlines
Deal found 17/6£772
Mon 21/921:15
LGW
-
SFO
2 stops24h 20m
TAP AIR PORTUGAL
Thu 15/1016:30
SFO
-
LGW
2 stops19h 55m
TAP AIR PORTUGAL
Deal found 20/6£662
Mon 19/1009:25
LGW
-
SFO
1 stop14h 50m
SWISS
Mon 26/1015:20
SFO
-
LGW
2 stops19h 30m
SWISS
Deal found 20/6£607
Mon 13/717:45
LTN
-
SFO
2 stops30h 55m
Multiple Airlines
Thu 16/720:30
SFO
-
LTN
1 stop17h 40m
Multiple Airlines
Deal found 20/6£756
Thu 9/709:20
LCY
-
SFO
2 stops20h 29m
Virgin Atlantic
Mon 13/713:30
SFO
-
LCY
2 stops19h 50m
Virgin Atlantic
Deal found 18/6£790
Tue 22/917:35
STN
-
SFO
1 stop31h 05m
Turkish Airlines
Tue 29/918:45
SFO
-
STN
1 stop37h 55m
Turkish Airlines
Deal found 20/6£797
Wed 1/709:25
LGW
-
SFO
1 stop14h 50m
SWISS
Fri 10/714:40
SFO
-
LGW
2 stops19h 10m
SWISS
Deal found 16/6£637
Mon 20/719:50
LTN
-
SFO
2 stops27h 37m
Multiple Airlines
Mon 27/711:10
SFO
-
LTN
2 stops21h 40m
Multiple Airlines
Deal found 20/6£784
Tue 22/917:35
STN
-
SFO
1 stop31h 05m
Turkish Airlines
Thu 15/1012:55
SFO
-
STN
1 stop37h 00m
Turkish Airlines
Deal found 20/6£797
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 21 June 2026.
Thu 17/910:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Wed 30/919:30
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 18/6£491
Thu 27/810:45
LHR
-
SFO
Nonstop11h 05m
American Airlines
Thu 17/916:35
SFO
-
LHR
Nonstop10h 25m
American Airlines
Deal found 18/6£492
Thu 27/813:00
LHR
-
SFO
Nonstop11h 00m
Lufthansa
Sat 5/919:50
SFO
-
LHR
Nonstop10h 20m
Lufthansa
Deal found 18/6£492
Mon 24/813:00
LHR
-
SFO
Nonstop11h 00m
Austrian Airlines
Sat 5/919:50
SFO
-
LHR
Nonstop10h 20m
Austrian Airlines
Deal found 19/6£494
Fri 11/910:45
LHR
-
SFO
Nonstop11h 05m
British Airways
Wed 30/916:35
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 19/6£495
Tue 27/1015:20
LHR
-
SFO
Nonstop11h 15m
British Airways
Sat 31/1021:35
SFO
-
LHR
Nonstop10h 35m
British Airways
Deal found 21/6£504
Sat 12/912:45
LHR
-
SFO
Nonstop11h 00m
Air France
Fri 25/923:15
SFO
-
LHR
Nonstop10h 15m
Air France
Deal found 16/6£505
Sat 12/912:45
LHR
-
SFO
Nonstop11h 00m
KLM
Sun 27/923:15
SFO
-
LHR
Nonstop10h 15m
KLM
Deal found 16/6£506
Tue 25/812:45
LHR
-
SFO
Nonstop11h 00m
Delta
Fri 11/923:15
SFO
-
LHR
Nonstop10h 15m
Delta
Deal found 16/6£507
Thu 20/812:45
LHR
-
SFO
Nonstop11h 00m
KLM
Mon 7/923:15
SFO
-
LHR
Nonstop10h 15m
KLM
Deal found 16/6£507
Sat 19/918:30
LHR
-
SFO
Nonstop10h 55m
Air France
Sat 26/917:55
SFO
-
LHR
Nonstop10h 20m
Air France
Deal found 17/6£508
Thu 3/910:45
LHR
-
SFO
Nonstop11h 05m
American Airlines
Sun 13/916:35
SFO
-
LHR
Nonstop10h 25m
American Airlines
Deal found 21/6£510
Last-minute flights from London to San Francisco
Discover last-minute flight deals from London to San Francisco. Data last updated 21 June 2026 and is based on user searches.
Thu 25/616:55
LHR
-
SFO
1 stop15h 14m
American Airlines
Thu 9/713:39
SFO
-
LHR
1 stop13h 11m
American Airlines
Deal found 18/6£495
Sat 27/609:15
LHR
-
SFO
1 stop19h 35m
British Airways
Wed 1/711:37
SFO
-
LHR
1 stop17h 08m
British Airways
Deal found 20/6£489
Sat 27/614:50
LHR
-
SFO
1 stop14h 30m
Lufthansa
Sat 11/712:15
SFO
-
LHR
1 stop13h 55m
Lufthansa
Deal found 20/6£497
Mon 29/609:15
LHR
-
SFO
1 stop18h 45m
American Airlines
Sun 12/719:30
SFO
-
LHR
Nonstop10h 25m
American Airlines
Deal found 21/6£491
Tue 30/617:40
LHR
-
SFO
2 stops25h 41m
Air Canada
Mon 6/713:25
SFO
-
LHR
1 stop33h 10m
Air Canada
Deal found 19/6£488
Wed 1/708:20
LHR
-
SFO
1 stop23h 49m
British Airways
Sun 12/719:30
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 21/6£494
Thu 2/708:30
LHR
-
SFO
2 stops24h 02m
Air Canada
Tue 7/706:15
SFO
-
LHR
2 stops16h 15m
Air Canada
Deal found 19/6£493
Thu 2/716:25
LHR
-
SFO
1 stop16h 18m
British Airways
Sat 18/714:03
SFO
-
LHR
1 stop16h 22m
British Airways
Deal found 18/6£495
Sat 4/719:30
LHR
-
SFO
2 stops29h 25m
Lufthansa
Sun 19/719:50
SFO
-
LHR
Nonstop10h 20m
Lufthansa
Deal found 21/6£496
Wed 8/709:15
LCY
-
SFO
2 stops38h 01m
SWISS
Wed 15/714:20
SFO
-
LCY
1 stop19h 05m
SWISS
Deal found 18/6£497
Thu 9/708:00
LHR
-
SFO
1 stop17h 19m
Lufthansa
Sun 26/708:10
SFO
-
LHR
1 stop17h 50m
Lufthansa
Deal found 20/6£492
Tue 14/709:15
LHR
-
SFO
1 stop23h 44m
British Airways
Sat 1/823:29
SFO
-
LHR
1 stop22h 51m
British Airways
Deal found 19/6£490
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 21 June 2026.
Wed 8/706:15
LTN
-
SFO
3 stops34h 33m
Multiple Airlines
Deal found 21/6£453
Sun 12/708:40
LHR
-
SFO
1 stop35h 14m
JetBlue
Deal found 20/6£453
Tue 30/611:35
LGW
-
SFO
2 stops32h 25m
Multiple Airlines
Deal found 16/6£453
Mon 29/617:20
STN
-
SFO
3 stops31h 45m
Multiple Airlines
Deal found 21/6£453
Mon 27/708:50
LTN
-
SFO
3 stops59h 10m
Multiple Airlines
Deal found 21/6£454
Tue 7/708:40
LHR
-
SFO
1 stop33h 25m
JetBlue
Deal found 20/6£454
Tue 18/819:35
LHR
-
SFO
2 stops28h 20m
Multiple Airlines
Deal found 19/6£455
Tue 11/821:35
LGW
-
SFO
3 stops32h 20m
Multiple Airlines
Deal found 19/6£455
Mon 24/811:10
SEN
-
SFO
2 stops36h 45m
Multiple Airlines
Deal found 20/6£455
Mon 29/608:20
LGW
-
SFO
3 stops36h 00m
Multiple Airlines
Deal found 16/6£455
Wed 1/709:55
STN
-
SFO
3 stops58h 05m
Multiple Airlines
Deal found 21/6£455
Mon 31/820:05
SEN
-
SFO
3 stops33h 50m
Multiple Airlines
Deal found 20/6£455
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 21 June 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 21 June 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
LCY - SFO
LCYSFO
London City
Wed 14/10
06:45-15:55
1 stop17h 10m
San Francisco
Sun 18/10
17:40-20:45
1 stop19h 05m
£503
LondonSan Francisco
LCY - SFO
LCYSFO
London City
Tue 22/9
09:20-20:18
2 stops18h 58m
San Francisco
Tue 29/9
06:00-07:55
2 stops17h 55m
£535
LondonSan Francisco
LCY - SFO
LCYSFO
London City
Fri 4/9
10:00-21:02
2 stops19h 02m
San Francisco
Sun 20/9
06:00-07:55
2 stops17h 55m
£542
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Mon 7/9
21:05-14:40
2 stops25h 35m
San Francisco
Mon 21/9
16:45-16:25
2 stops15h 40m
£560
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Wed 9/9
16:25-14:30
1 stop30h 05m
San Francisco
Tue 15/9
19:20-20:30
3 stops41h 10m
£563
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 9/9
19:50-14:40
2 stops26h 50m
San Francisco
Tue 15/9
16:45-16:25
2 stops15h 40m
£566
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Mon 7/9
21:15-14:35
2 stops49h 20m
San Francisco
Mon 21/9
16:30-11:20
2 stops34h 50m
£569
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Wed 1/7
09:25-16:15
1 stop14h 50m
San Francisco
Mon 1/2
19:25-17:50
1 stop14h 25m
£571
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 8/7
17:00-22:55
1 stop13h 55m
San Francisco
Mon 26/10
16:18-12:20
1 stop13h 02m
£594
LondonSan Francisco
LGW - SFO
LGWSFO
London Gatwick
Fri 18/9
09:25-16:15
1 stop14h 50m
San Francisco
Fri 25/9
14:40-17:50
2 stops19h 10m
£596
Flights are sorted by cheapest return flights first.
Deals found on 20/6
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
LHR-SFO
LCY-SFO
SEN-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
LHR-SFO
LCY-SFO
SEN-SFO
LGW-SFO
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 £412). Flying from London to San Francisco in December is currently the most expensive (average of £683). 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 21 June 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 21 June 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 (33 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 30% 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 £378.
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 03m.
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 139 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?
Friday 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 11% of flights being delayed.
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 80 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.
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 21 June 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.
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 39 inbound flights from London per day. You should also have plenty of airline options to choose from since 19 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 17h 10m. Fly via British Airways, Virgin Atlantic, or Scandinavian Airlines to get the fastest option. London and San Francisco are separated by a distance of 5363 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 £325. Additional return tickets that might be worth considering are offered by SWISS and Aer Lingus, with the lowest prices starting at £355 and £358, respectively. Delta is priced at 39% 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 £276. Virgin Atlantic flights start at £329 while deals on Iberia start at £330 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 City - 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 £456. On average you can expect to pay £1,194. The most popular route, (London Heathrow - San Francisco), can usually be booked for £409.
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 £412). Flying from London to San Francisco in December is currently the most expensive (average of £683). 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
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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 21 June 2026.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 21 June 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 21 June 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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