Cheap flights from London Heathrow Airport to San Francisco from £364
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
1 Oct — 8 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 23 days in advance, depart on a Thursday or Wednesday and return on a Wednesday
Cheap flight deals from Heathrow to San Francisco
Enter your travel dates to find the best prices.
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Best
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One-way
Cheapest flights from Heathrow to San Francisco
Explore the most affordable flight options available from Heathrow to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 September 2026.
Fri 25/1216:30 -
1 stop15h 39m
Fri 1/114:12 -
1 stop13h 23m
Deal found 31/8£450
Fri 13/1108:55 -
2 stops20h 39m
Thu 11/308:55 -
2 stops17h 45m
Deal found 31/8£451
Sun 6/910:35 -
Nonstop11h 00m
Sat 12/916:40 -
Nonstop10h 30m
Deal found 1/9£453
Fri 18/1214:45 -
1 stop17h 14m
Fri 25/1212:30 -
1 stop15h 50m
Deal found 31/8£454
Thu 12/1111:50 -
Nonstop11h 00m
Wed 10/316:40 -
Nonstop10h 15m
Deal found 31/8£455
Sun 8/1111:50 -
Nonstop11h 00m
Sun 7/316:40 -
Nonstop10h 15m
Deal found 31/8£455
Tue 10/1111:50 -
Nonstop11h 00m
Tue 9/316:40 -
Nonstop10h 15m
Deal found 31/8£456
Wed 11/1106:20 -
2 stops21h 57m
Wed 10/311:30 -
1 stop15h 00m
Deal found 31/8£458
Fri 18/1206:05 -
2 stops24h 06m
Fri 25/1209:28 -
1 stop16h 32m
Deal found 31/8£459
Wed 23/1211:00 -
1 stop18h 08m
Mon 4/106:47 -
1 stop16h 03m
Deal found 31/8£460
Sun 20/1214:45 -
1 stop28h 47m
Wed 30/1221:26 -
1 stop30h 54m
Deal found 31/8£461
Sun 4/1012:45 -
Nonstop11h 10m
Thu 15/1017:55 -
Nonstop10h 20m
Deal found 1/9£464
Best flights from Heathrow to San Francisco
Discover carefully curated flight deals from Heathrow to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.
Thu 17/907:00 -
2 stops17h 15m
Wed 7/1019:35 -
2 stops17h 55m
Deal found 31/8£504
Thu 17/1211:50 -
Nonstop11h 00m
Mon 4/116:40 -
Nonstop10h 15m
Deal found 29/8£679
Thu 17/1210:05 -
Nonstop11h 15m
Sun 3/106:20 -
1 stop19h 20m
Deal found 29/8£681
Tue 22/921:25 -
2 stops35h 31m
Tue 29/907:40 -
3 stops20h 15m
Deal found 31/8£778
Sat 19/914:30 -
Nonstop11h 10m
Wed 7/1019:30 -
Nonstop10h 25m
Deal found 30/8£807
Tue 27/1020:35 -
2 stops31h 53m
Fri 6/1106:00 -
2 stops20h 50m
Deal found 28/8£830
Tue 29/907:00 -
2 stops17h 15m
Thu 8/1019:35 -
2 stops17h 55m
Deal found 30/8£585
Thu 10/1214:25 -
2 stops34h 05m
Thu 24/1219:25 -
2 stops18h 00m
Deal found 28/8£599
Fri 18/1213:45 -
Nonstop11h 10m
Mon 4/116:40 -
Nonstop10h 35m
Deal found 29/8£816
Sun 20/910:45 -
Nonstop11h 05m
Sat 10/1019:30 -
Nonstop10h 25m
Deal found 31/8£847
Thu 29/1012:15 -
2 stops19h 10m
Tue 3/1111:41 -
2 stops15h 09m
Deal found 28/8£853
Fri 13/1114:25 -
2 stops34h 05m
Fri 20/1119:25 -
2 stops18h 00m
Deal found 31/8£712
Direct flights from Heathrow to San Francisco
Explore direct flight options from Heathrow to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 1 September 2026.
Thu 12/1111:50 -
Nonstop11h 00m
Wed 10/316:40 -
Nonstop10h 15m
Deal found 31/8£455
Sun 8/1111:50 -
Nonstop11h 00m
Thu 11/316:40 -
Nonstop10h 15m
Deal found 31/8£455
Tue 10/1111:50 -
Nonstop11h 00m
Tue 9/316:40 -
Nonstop10h 15m
Deal found 31/8£456
Sun 4/1012:45 -
Nonstop11h 10m
Thu 15/1017:55 -
Nonstop10h 20m
Deal found 1/9£464
Mon 2/1111:45 -
Nonstop11h 10m
Fri 6/1117:25 -
Nonstop10h 25m
Deal found 28/8£467
Sun 4/1012:45 -
Nonstop11h 10m
Sun 11/1017:55 -
Nonstop10h 20m
Deal found 30/8£470
Sun 25/1013:45 -
Nonstop11h 10m
Sun 1/1116:40 -
Nonstop10h 35m
Deal found 30/8£475
Thu 15/1013:00 -
Nonstop11h 00m
Sat 31/1017:40 -
Nonstop10h 35m
Deal found 30/8£476
Sun 4/1012:45 -
Nonstop11h 10m
Thu 15/1017:55 -
Nonstop10h 20m
Deal found 30/8£480
Sat 12/1211:50 -
Nonstop11h 00m
Mon 11/116:40 -
Nonstop10h 15m
Deal found 28/8£481
Thu 24/1211:50 -
Nonstop11h 00m
Wed 6/116:40 -
Nonstop10h 15m
Deal found 31/8£482
Last-minute flights from Heathrow to San Francisco
Discover last-minute flight deals from Heathrow to San Francisco. Data last updated 1 September 2026 and is based on user searches.
Tue 1/918:45 -
1 stop27h 50m
Sat 31/1017:35 -
1 stop22h 05m
Deal found 1/9£467
Tue 1/918:45 -
1 stop27h 50m
Wed 30/916:35 -
1 stop18h 15m
Deal found 29/8£474
Thu 3/914:25 -
1 stop17h 20m
Sun 6/910:58 -
1 stop13h 07m
Deal found 28/8£468
Sun 6/910:35 -
Nonstop11h 00m
Sat 12/916:40 -
Nonstop10h 30m
Deal found 1/9£453
Mon 7/920:10 -
1 stop27h 45m
Mon 21/913:27 -
1 stop13h 38m
Deal found 31/8£470
Wed 16/908:40 -
1 stop15h 35m
Wed 16/919:45 -
Nonstop10h 25m
Deal found 27/8£478
Sun 20/907:25 -
1 stop19h 35m
Sun 4/1016:45 -
Nonstop10h 25m
Deal found 31/8£469
Sun 20/908:30 -
2 stops22h 25m
Sat 3/1012:45 -
1 stop13h 55m
Deal found 1/9£475
Sun 20/908:30 -
2 stops22h 25m
Wed 30/921:05 -
1 stop17h 35m
Deal found 31/8£476
One-way flights from Heathrow to San Francisco
Search for one-way flight options from Heathrow to San Francisco. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.
Sun 15/1109:55 -
2 stops36h 50m
Deal found 30/8£364
Mon 26/1017:25 -
2 stops55h 05m
Deal found 31/8£365
Fri 27/1107:00 -
2 stops17h 30m
Deal found 31/8£365
Thu 26/1114:25 -
2 stops34h 05m
Deal found 29/8£366
Thu 29/1013:30 -
1 stop18h 14m
Deal found 27/8£368
Thu 25/215:20 -
Nonstop11h 25m
Deal found 31/8£368
Thu 22/1006:15 -
2 stops20h 36m
Deal found 31/8£369
Thu 17/1214:45 -
1 stop17h 14m
Deal found 1/9£370
Fri 30/1014:45 -
1 stop14h 04m
Deal found 28/8£371
Tue 13/1019:15 -
2 stops29h 00m
Deal found 1/9£371
Sun 28/219:30 -
2 stops29h 00m
Deal found 30/8£372
Find flight deals from Heathrow to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 1 September 2026.
Customise your flight search to find flights from Heathrow 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 7,457,451 searches. Data last updated 1 September 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Thu 17/9
07:00-16:15
2 stops17h 15m
San Francisco
Wed 7/10
19:35-21:30
2 stops17h 55m
£504
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Tue 29/9
07:00-16:15
2 stops17h 15m
San Francisco
Thu 8/10
19:35-21:30
2 stops17h 55m
£585
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Thu 10/12
14:25-16:30
2 stops34h 05m
San Francisco
Thu 24/12
19:25-21:25
2 stops18h 00m
£599
Fastest return journey
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Thu 17/12
11:50-14:50
Nonstop11h 00m
San Francisco
Mon 4/1
16:40-10:55
Nonstop10h 15m
£679
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Thu 17/12
10:05-13:20
Nonstop11h 15m
San Francisco
Sun 3/1
06:20-09:40
1 stop19h 20m
£681
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Fri 13/11
14:25-16:30
2 stops34h 05m
San Francisco
Fri 20/11
19:25-21:25
2 stops18h 00m
£712
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Tue 22/9
21:25-00:56
2 stops35h 31m
San Francisco
Tue 29/9
07:40-11:55
3 stops20h 15m
£778
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Sat 19/9
14:30-17:40
Nonstop11h 10m
San Francisco
Wed 7/10
19:30-13:55
Nonstop10h 25m
£807
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Fri 18/12
13:45-16:55
Nonstop11h 10m
San Francisco
Mon 4/1
16:40-11:15
Nonstop10h 35m
£816
LondonSan Francisco
LHR London Heathrow - SFO San Francisco
LHRSFO
London Heathrow
Tue 27/10
20:35-21:28
2 stops31h 53m
San Francisco
Fri 6/11
06:00-10:50
2 stops20h 50m
£830
Flights are sorted by cheapest return flights first.
Deals found on 31/8
Showing 1-10 of 23 resultsSorted by cheapest first
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2
3
Best time to book a flight from Heathrow to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Heathrow with our price prediction graph.
LHR-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 Heathrow Airport to San Francisco
Prices
Airlines
Delays
More
How far ahead should I book a flight from London Heathrow Airport to San Francisco?
The price you pay for your flight from London Heathrow Airport to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 22 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 London Heathrow Airport to San Francisco?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £447). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of £641). 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 LHR to SFO?
Find hourly flight availability from Heathrow 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 1 September 2026.
When flying from London Heathrow Airport to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How much does it cost for a return flight from London Heathrow Airport to San Francisco?
Airfare is typical for this route at the moment.
London Heathrow Airport to San Francisco flights typically cost between £429 and £554 in December.The cheapest return price found within the last 5 days was £450 on American Airlines (25 Dec–1 Jan).
Weekly flight availability from London Heathrow Airport to San Francisco
Explore weekly flight availability from Heathrow 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 1 September 2026.
The most flights from LHR to SFO are scheduled on a Tuesday (44 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (31 on average).
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 143 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 12% of flights being delayed.
What’s the top stopover airport for flights from London Heathrow Airport to San Francisco?
Share of one-stop return flights from London Heathrow Airport 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 36% of one-stop itineraries from London Heathrow Airport to San Francisco on Cheapflights.
What’s the cheapest stopover airport for flights from London Heathrow Airport to San Francisco?
Average return fare for one-stop flights from London Heathrow Airport to San Francisco, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £413.
What’s the fastest stopover option from London Heathrow Airport to San Francisco?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to San Francisco, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Vancouver (YVR) have the shortest average one-way travel time for one-stop routes: 14h 04m.
Which airport typically offers the quickest stopover for flights from London Heathrow Airport to San Francisco?
Average stopover duration for one-stop one-way flights from London Heathrow Airport to San Francisco, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average stopover time of 1h 26m.
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 1 September 2026.
See what other customers who have flown with Austrian Airlines,United Airlines, andVirgin Atlantic from London Heathrow Airport to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Staff is courteous. Food is served with a nice touch, with the chef coming out to discuss the menu. But the quality and variety of food and snacks is below competing airlines. Onboard in Vienna was a bit chaotic. I am 6 ft 1 in tall and the flat beds are a bit tight. Other than that, the overall experience was fine.
Staff is courteous. Food is served with a nice touch, with the chef coming out to discuss the menu. But the quality and variety of food and snacks is below competing airlines. Onboard in Vienna was a bit chaotic. I am 6 ft 1 in tall and the flat beds are a bit tight. Other than that, the overall experience was fine.
Staff is courteous. Food is served with a nice touch, with the chef coming out to discuss the menu. But the quality and variety of food and snacks is below competing airlines. Onboard in Vienna was a bit chaotic. I am 6 ft 1 in tall and the flat beds are a bit tight. Other than that, the overall experience was fine.
Staff is courteous. Food is served with a nice touch, with the chef coming out to discuss the menu. But the quality and variety of food and snacks is below competing airlines. Onboard in Vienna was a bit chaotic. I am 6 ft 1 in tall and the flat beds are a bit tight. Other than that, the overall experience was fine.
Staff is courteous. Food is served with a nice touch, with the chef coming out to discuss the menu. But the quality and variety of food and snacks is below competing airlines. Onboard in Vienna was a bit chaotic. I am 6 ft 1 in tall and the flat beds are a bit tight. Other than that, the overall experience was fine.
Staff is courteous. Food is served with a nice touch, with the chef coming out to discuss the menu. But the quality and variety of food and snacks is below competing airlines. Onboard in Vienna was a bit chaotic. I am 6 ft 1 in tall and the flat beds are a bit tight. Other than that, the overall experience was fine.
Related info for your journey
Find useful and relevant information for your journey from Heathrow 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 Heathrow?
Located just 11.0 mi from the city center, San Francisco is the airport most travelers will use when flying to San Francisco from London Heathrow. Booking flights from London Heathrow to San Francisco (SFO) should be relatively easy as there are 40 daily inbound flights from London Heathrow from 19 different airlines.
How long is the flight from London Heathrow Airport to San Francisco?
SWISS, Delta, and United Airlines can get you from London Heathrow Airport to San Francisco in just under 11h. Your travel time can differ by up to 6h 15m. Airlines will cover a distance of 5350 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to San Francisco round-trip?
Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from £273. Other airlines that can offer you cheap pricing are SWISS, from £347, and TAP AIR PORTUGAL, from £357. Delta is priced at 49% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from London Heathrow Airport 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 £298 while deals on British Airways start at £321 one-way.
What are the most reliable airlines from London Heathrow Airport to San Francisco?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to San Francisco on time: Air Canada (75%), Austrian Airlines (75%), United Airlines (75%).
What are the cheapest flights from London Heathrow Airport to San Francisco?
The cheapest flight price from London Heathrow Airport to San Francisco is £346. On average you can expect to pay £1,180. The most popular route, (London Heathrow - San Francisco), can usually be booked for £298.
Can I find deals for business class flights from Heathrow to San Francisco?
Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to San Francisco?
Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of £447). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of £641). 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.
Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
San Bruno
Roseville
Newark
Bodega Bay
Sunnyvale
South San Francisco
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Fly from Heathrow to San Francisco on these airlines
Choose from the following airlines for your flight from Heathrow to San Francisco. Flights are based on user searches made on Cheapflights and were last updated on 1 September 2026.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 1 September 2026.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 1 September 2026.
Top 10 airlines flying from Heathrow to San Francisco
Discover the top 10 airlines that operate flights from Heathrow 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 7,457,451 searches. Data last updated 1 September 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 Heathrow to San Francisco?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco from Heathrow today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?
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 San Francisco from Heathrow.
Can Cheapflights find flights from Heathrow to San Francisco with no change fees?
Yes! Cheapflights helps users easily find flights from Heathrow to San Francisco with no change fees.
Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?
Of course! You can now track prices for flights from Heathrow 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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