Cheap flights from San Francisco to London Heathrow Airport from £244
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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — LHR
16 Sep — 23 Sep1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Francisco to London Heathrow are usually found in February or January, booked 35 days in advance, depart on a Wednesday or Thursday and return on a Thursday
Cheap flight deals from San Francisco to Heathrow
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from San Francisco to Heathrow
Explore the most affordable flight options available from San Francisco to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.
Sat 31/1017:45 -
1 stop16h 55m
Mon 9/1106:40 -
1 stop16h 10m
Deal found 16/8£464
Thu 29/1017:45 -
1 stop16h 55m
Sun 8/1106:40 -
1 stop16h 10m
Deal found 16/8£465
Mon 21/916:30 -
1 stop17h 15m
Tue 6/1013:45 -
1 stop32h 50m
Deal found 16/8£471
Thu 17/916:30 -
1 stop22h 25m
Mon 28/913:45 -
1 stop31h 50m
Deal found 14/8£474
Wed 28/1017:45 -
1 stop16h 55m
Mon 9/1106:40 -
1 stop16h 10m
Deal found 16/8£475
Best flights from San Francisco to Heathrow
Discover carefully curated flight deals from San Francisco to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 August 2026.
Tue 3/1122:55 -
1 stop13h 50m
Tue 8/1209:00 -
1 stop15h 30m
Deal found 17/8£577
Sun 1/1112:50 -
Nonstop10h 35m
Wed 18/1111:10 -
1 stop16h 25m
Deal found 15/8£659
Sun 13/917:45 -
Nonstop10h 20m
Tue 29/906:30 -
1 stop13h 15m
Deal found 14/8£685
Tue 6/1017:45 -
Nonstop10h 20m
Sun 11/1012:45 -
Nonstop11h 00m
Deal found 17/8£717
Mon 21/919:35 -
2 stops17h 55m
Tue 6/1019:15 -
2 stops29h 00m
Deal found 13/8£720
Wed 9/907:10 -
2 stops18h 10m
Sun 27/919:50 -
2 stops26h 50m
Deal found 13/8£787
Mon 21/912:50 -
Nonstop10h 35m
Tue 6/1010:35 -
Nonstop11h 00m
Deal found 15/8£683
Sun 6/911:40 -
2 stops16h 15m
Wed 7/1013:05 -
2 stops17h 15m
Deal found 14/8£738
Tue 15/1206:00 -
1 stop20h 00m
Fri 1/109:50 -
1 stop18h 51m
Deal found 15/8£775
Tue 22/919:45 -
Nonstop10h 25m
Sat 10/1015:05 -
1 stop14h 15m
Deal found 16/8£717
Direct flights from San Francisco to Heathrow
Explore direct flight options from San Francisco to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 August 2026.
Sat 13/220:35 -
Nonstop10h 35m
Thu 25/215:20 -
Nonstop11h 25m
Deal found 14/8£544
Sat 13/220:35 -
Nonstop10h 35m
Sun 21/211:45 -
Nonstop11h 10m
Deal found 13/8£550
Wed 7/1019:30 -
Nonstop10h 25m
Wed 21/1010:45 -
Nonstop11h 05m
Deal found 16/8£553
Tue 10/1120:35 -
Nonstop10h 35m
Fri 27/1111:45 -
Nonstop11h 10m
Deal found 17/8£556
Sun 8/1117:25 -
Nonstop10h 25m
Tue 1/1211:45 -
Nonstop11h 10m
Deal found 17/8£567
Mon 9/1120:35 -
Nonstop10h 35m
Tue 1/1211:45 -
Nonstop11h 10m
Deal found 17/8£567
Sat 13/217:25 -
Nonstop10h 25m
Mon 22/215:20 -
Nonstop11h 25m
Deal found 14/8£571
Wed 18/1120:35 -
Nonstop10h 35m
Sun 22/1111:45 -
Nonstop11h 10m
Deal found 15/8£572
Tue 17/1117:25 -
Nonstop10h 25m
Mon 23/1111:45 -
Nonstop11h 10m
Deal found 15/8£572
Sun 15/1117:25 -
Nonstop10h 25m
Sun 22/1111:45 -
Nonstop11h 10m
Deal found 15/8£573
Sun 15/1117:25 -
Nonstop10h 25m
Mon 23/1111:45 -
Nonstop11h 10m
Deal found 15/8£575
Last-minute flights from San Francisco to Heathrow
Discover last-minute flight deals from San Francisco to Heathrow. Data last updated 17 August 2026 and is based on user searches.
Thu 17/916:30 -
1 stop22h 25m
Mon 28/913:45 -
1 stop31h 50m
Deal found 14/8£474
Mon 21/916:30 -
1 stop17h 15m
Tue 6/1013:45 -
1 stop32h 50m
Deal found 16/8£471
Mon 21/916:30 -
1 stop18h 20m
Mon 28/918:45 -
1 stop26h 50m
Deal found 13/8£486
One-way flights from San Francisco to Heathrow
Search for one-way flight options from San Francisco to Heathrow. Find affordable one-way fares based on user searches. Data last updated 17 August 2026.
Fri 4/1207:30 -
1 stop15h 25m
Deal found 17/8£244
Sun 25/1006:07 -
3 stops42h 58m
Deal found 15/8£245
Tue 13/1021:45 -
1 stop24h 45m
Deal found 12/8£245
Wed 18/1106:30 -
2 stops18h 00m
Deal found 13/8£246
Wed 25/1117:25 -
Nonstop10h 25m
Deal found 15/8£247
Mon 5/1011:25 -
1 stop35h 05m
Deal found 17/8£248
Fri 11/911:49 -
1 stop24h 56m
Deal found 13/8£249
Thu 15/1014:37 -
1 stop31h 53m
Deal found 13/8£250
Mon 14/920:29 -
1 stop16h 16m
Deal found 13/8£250
Thu 1/1011:25 -
1 stop35h 05m
Deal found 14/8£251
Sun 27/1215:05 -
1 stop16h 35m
Deal found 13/8£253
Mon 14/1220:35 -
Nonstop10h 35m
Deal found 14/8£254
Find flight deals from San Francisco to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Heathrow (LHR). 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 17 August 2026.
Customise your flight search to find flights from San Francisco to Heathrow 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 17 August 2026.
Use the filters below to find and compare flights from San Francisco to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Tue 3/11
22:55-20:45
1 stop13h 50m
London Heathrow
Tue 8/12
09:00-16:30
1 stop15h 30m
£577
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Sun 1/11
12:50-07:25
Nonstop10h 35m
London Heathrow
Wed 18/11
11:10-19:35
1 stop16h 25m
£659
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Mon 21/9
12:50-07:25
Nonstop10h 35m
London Heathrow
Tue 6/10
10:35-13:35
Nonstop11h 00m
£683
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Sun 13/9
17:45-12:05
Nonstop10h 20m
London Heathrow
Tue 29/9
06:30-11:45
1 stop13h 15m
£685
Fastest return journey
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Tue 6/10
17:45-12:05
Nonstop10h 20m
London Heathrow
Sun 11/10
12:45-15:45
Nonstop11h 00m
£717
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Tue 22/9
19:45-14:10
Nonstop10h 25m
London Heathrow
Sat 10/10
15:05-21:20
1 stop14h 15m
£717
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Mon 21/9
19:35-21:30
2 stops17h 55m
London Heathrow
Tue 6/10
19:15-16:15
2 stops29h 00m
£720
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Sun 6/9
11:40-11:55
2 stops16h 15m
London Heathrow
Wed 7/10
13:05-22:20
2 stops17h 15m
£738
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Tue 15/12
06:00-10:00
1 stop20h 00m
London Heathrow
Fri 1/1
09:50-20:41
1 stop18h 51m
£775
San FranciscoLondon
SFO San Francisco - LHR London Heathrow
SFOLHR
San Francisco
Wed 9/9
07:10-09:20
2 stops18h 10m
London Heathrow
Sun 27/9
19:50-14:40
2 stops26h 50m
£787
Flights are sorted by cheapest return flights first.
Deals found on 16/8
Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from San Francisco to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Francisco with our price prediction graph.
SFO-LHR
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 Heathrow Airport
Prices
Airlines
Delays
More
How far ahead should I book a flight from San Francisco to London Heathrow Airport?
Booking 34 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from San Francisco to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £479). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £980). 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 LHR?
Find hourly flight availability from San Francisco to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 August 2026.
When flying from San Francisco to London Heathrow Airport, 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 33% versus a flight at midday.
What is the cheapest day to fly from San Francisco to London Heathrow Airport?
Use this chart to determine the cheapest time to fly return from San Francisco to Heathrow. Price data was last updated on 15 August 2026.
Travellers seeking maximum savings on their San Francisco to London Heathrow Airport flight should consider departing on Saturday at midday when fares are most often at their lowest. Tuesday at midday flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost for a return flight from San Francisco to London Heathrow Airport?
Airfare is below average for this route at the moment.
San Francisco to London Heathrow Airport flights typically cost between £562 and £820 in January.The cheapest return price found within the last 5 days was £447 on Multiple Airlines (12 Jan–6 Feb).
Weekly flight availability from San Francisco to London Heathrow Airport
Explore weekly flight availability from San Francisco to Heathrow. 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 17 August 2026.
The most flights from SFO to LHR are scheduled on a Monday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (38 on average).
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 153 minutes.
What is the most punctual flight time for San Francisco to London flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning 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, British Airways have had the lowest number of delays on this route, with just 8% of flights being delayed.
What’s the top stopover airport for flights from San Francisco to London Heathrow Airport?
Share of one-stop return flights from San Francisco to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Copenhagen (CPH) – chosen by Cheapflights users on 45% of one-stop itineraries from San Francisco to London Heathrow Airport on Cheapflights.
What’s the cheapest stopover airport for flights from San Francisco to London Heathrow Airport?
Average return fare for one-stop flights from San Francisco to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Dallas (DFW) is the most affordable one-stop option, with an average return flight price of £422.
What’s the fastest stopover option from San Francisco to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from San Francisco to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 13h 20m.
Which airport typically offers the quickest stopover for flights from San Francisco to London Heathrow Airport?
Average stopover duration for one-stop one-way flights from San Francisco to London Heathrow Airport, 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.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 17 August 2026.
See what other customers who have flown with KLM,Virgin Atlantic, andUnited Airlines from San Francisco to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy
They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy
They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy
They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy
They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy
They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Heathrow. 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 Heathrow?
For a flight from San Francisco to London Heathrow, you will be flying from San Francisco. San Francisco (SFO) is just 11.0 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 38 outbound flights to London Heathrow per day. 6 airlines have flights to London Heathrow from San Francisco on a regular basis.
How long is the flight from San Francisco to London Heathrow Airport?
Airlines like United Airlines and Delta fly from San Francisco to London Heathrow Airport in about 10h 20m. The time it takes to get you to your destination is usually consistent. Airlines will cover a distance of 5350 mi. All flights are typically direct.
What are the cheapest airlines flying from San Francisco to London Heathrow Airport round-trip?
Currently priced at £431, Virgin Atlantic will fly you from San Francisco to London Heathrow Airport and back. In addition to Virgin Atlantic, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and KLM - these airlines can fly you to your destination from £441 and £451, respectively. Users have found that Virgin Atlantic is 33% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from San Francisco to London Heathrow Airport one-way?
To fly one-way, consider booking your trip with Virgin Atlantic, which is currently one of the cheapest options available, starting at £170. United Airlines flights start at £243 while deals on KLM start at £263 one-way.
What are the most reliable airlines from San Francisco to London Heathrow Airport?
Consider Air Canada (83%), Austrian Airlines (83%) or United Airlines (83%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to London Heathrow Airport.
What are the cheapest flights from San Francisco to London Heathrow Airport?
On average you can expect to pay £1,545 for a flight from San Francisco to London Heathrow Airport. The cheapest flight overall is £295 while the most popular route, (San Francisco - London Heathrow) is currently priced at £485.
Can I find deals for business class flights from San Francisco to Heathrow?
Yes. Cheapflights offers flight deals from San Francisco to Heathrow 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 Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from San Francisco to London Heathrow Airport (average of £479). Flying from San Francisco to London Heathrow Airport in June is currently the most expensive (average of £980). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 August 2026.
Top 6 airlines flying from San Francisco to Heathrow
Discover the top 6 airlines that operate flights from San Francisco to Heathrow. 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 17 August 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 San Francisco to Heathrow?
Cheapflights helps you search for flights from San Francisco to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from San Francisco to Heathrow?
Cheapflights simply makes it quick and affordable to book flights from San Francisco to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from San Francisco to Heathrow with no change fees?
Yes! Cheapflights helps users easily find flights from San Francisco to Heathrow with no change fees.
Can Cheapflights notify me if prices for flights from San Francisco to Heathrow become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from San Francisco today and book when prices fit your budget.
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