BA's Club Suite offers private pods with a door for enhanced privacy on long-haul flights.
BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.
$488+ Cheap flights from Heathrow (LHR) to San Francisco (SFO)
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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
Jan 8 — Jan 151
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Heathrow to San Francisco with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 45 days in advance, depart on a Thursday or Wednesday and return on a Wednesday
Cheap flight deals from Heathrow to San Francisco
Cheapest flights from Heathrow to San FranciscoExplore 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 December 9, 2025.
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 December 9, 2025.
This Kiwi.com deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amLHR - SFO
1 stop18h 05mTAP AIR PORTUGAL
Fri 1/167:10 pmSFO - LHR
1 stop15h 45mTAP AIR PORTUGAL
Deal found 12/8![TAP AIR PORTUGAL logo]()
$628
This FlightHub deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:30 pmLHR - SFO
1 stop29h 35mTAP AIR PORTUGAL
Fri 1/97:10 pmSFO - LHR
1 stop15h 45mTAP AIR PORTUGAL
Deal found 12/9![TAP AIR PORTUGAL logo]()
$630
This SWISS deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:40 pmLHR - SFO
1 stop29h 50mSWISS
Thu 1/227:25 pmSFO - LHR
1 stop14h 25mSWISS
Deal found 12/9![SWISS logo]()
$633
This SWISS deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:40 pmLHR - SFO
1 stop29h 50mSWISS
Tue 1/2011:45 amSFO - LHR
2 stops20h 35mSWISS
Deal found 12/8![SWISS logo]()
$634
This deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:20 amLHR - SFO
1 stop17h 00mAmerican Airlines
Thu 12/1810:22 amSFO - LHR
1 stop17h 58mAmerican Airlines
Deal found 12/8![American Airlines logo]()
$637
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:30 pmLHR - SFO
1 stop29h 35mTAP AIR PORTUGAL
Sat 1/104:35 pmSFO - LHR
1 stop18h 20mTAP AIR PORTUGAL
Deal found 12/9![TAP AIR PORTUGAL logo]()
$641
This oojo deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amLHR - SFO
1 stop18h 05mTAP AIR PORTUGAL
Sat 1/104:35 pmSFO - LHR
1 stop18h 20mTAP AIR PORTUGAL
Deal found 12/8![TAP AIR PORTUGAL logo]()
$650
This oojo deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/156:00 amLHR - SFO
1 stop16h 35mTAP AIR PORTUGAL
Mon 12/294:35 pmSFO - LHR
1 stop36h 05mTAP AIR PORTUGAL
Deal found 12/8![TAP AIR PORTUGAL logo]()
$651
This Kiwi.com deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amLHR - SFO
1 stop18h 05mTAP AIR PORTUGAL
Mon 1/124:35 pmSFO - LHR
1 stop16h 55mTAP AIR PORTUGAL
Deal found 12/8![TAP AIR PORTUGAL logo]()
$661
This The Travel House deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:20 amLHR - SFO
1 stop36h 15mScandinavian Airlines
Mon 1/194:40 pmSFO - LHR
1 stop15h 20mScandinavian Airlines
Deal found 12/8![Scandinavian Airlines logo]()
$665
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 December 9, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $625 (Kiwi.com) |
One-way from | $488 (FlightHub) |
Popular in | July |
Cheapest in | February |
Average price | $858 |
Good round-trip deal | $746 or less |
Good one-way deal | $524 or less |
Cheapflights Fare Finder
Customize 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 2,558,603 searches. Data last updated December 9, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.
Fly from
Heathrow
Fly to
San Francisco
Route
Depart
Return
Price
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 5/13
8:45 am-4:10 pm
1 stop15h 25m
San Francisco
Tue 5/19
8:30 am-6:30 am
1 stop14h 00m
$641
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Fri 1/23
6:00 am-4:05 pm
1 stop18h 05m
San Francisco
Wed 1/28
4:35 pm-5:30 pm
1 stop16h 55m
$654
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Tue 2/17
10:05 am-1:20 pm
Nonstop11h 15m
San Francisco
Tue 2/24
12:50 pm-7:25 am
Nonstop10h 35m
$659
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Wed 3/11
1:45 pm-6:00 pm
Nonstop11h 15m
San Francisco
Wed 3/18
6:25 pm-12:00 pm
Nonstop10h 35m
$659
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Tue 2/17
1:45 pm-5:00 pm
Nonstop11h 15m
San Francisco
Mon 2/23
12:50 pm-7:25 am
Nonstop10h 35m
$659
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Tue 1/20
1:45 pm-5:00 pm
Nonstop11h 15m
San Francisco
Mon 2/9
12:50 pm-7:25 am
Nonstop10h 35m
$659
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Thu 2/19
9:00 am-4:30 pm
1 stop15h 30m
San Francisco
Mon 2/23
12:50 pm-7:25 am
Nonstop10h 35m
$662
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sat 1/31
9:00 am-4:30 pm
1 stop15h 30m
San Francisco
Mon 2/2
5:25 pm-12:00 pm
Nonstop10h 35m
$662
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Tue 1/20
11:10 am-6:55 pm
1 stop15h 45m
San Francisco
Sat 2/14
5:25 pm-12:00 pm
Nonstop10h 35m
$666
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Fri 2/13
11:30 am-8:10 pm
1 stop16h 40m
San Francisco
Mon 2/23
12:50 pm-7:25 am
Nonstop10h 35m
$668
Showing 1-10 of 20 results
Compare providers for flights from Heathrow to San Francisco
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Heathrow to San Francisco in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on London Heathrow Airport-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London Heathrow Airport-San Francisco flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London Heathrow Airport-San Francisco flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London Heathrow Airport-San Francisco flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London Heathrow Airport-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
Estimated round-trip 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?
Use this chart to determine the optimal time to book a round-trip flight from Heathrow to San Francisco. Price data was last updated on December 5, 2025.
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 45 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 $476). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of $609). 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 December 9, 2025.
When flying from London Heathrow Airport to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 4% versus a flight in the afternoon.
How often are flights from London to San Francisco delayed?
About 13% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 140 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 Sunday 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 last year, Virgin Atlantic have had the lowest number of delays on this route, with just 12% of flights being delayed.
What’s the top layover airport for flights from London Heathrow Airport to San Francisco?
Share of 1-stop round-trip flights from London Heathrow Airport to San Francisco chosen by Cheapflights users in the past 12 months, using the same layover each way.
Lisbon (LIS) – chosen by Cheapflights users on 60% of 1-stop itineraries from London Heathrow Airport to San Francisco on Cheapflights.
What’s the cheapest layover airport for flights from London Heathrow Airport to San Francisco?
Average round-trip fare for 1-stop flights from London Heathrow Airport to San Francisco, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Copenhagen (CPH) is the most affordable 1-stop option, with an average round-trip price of $520.
What’s the fastest layover option from London Heathrow Airport to San Francisco?
Shortest average travel time for 1-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 layover airport.
Flights via Copenhagen (CPH) have the shortest average one-way travel time for 1-stop routes: 16h 30m.
Which airport typically offers the quickest layover for flights from London Heathrow Airport to San Francisco?
Average layover duration for 1-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 Lisbon (LIS) offer the fastest connection on this route, with an average layover time of 1h 54m.
The best insider tips for London Heathrow Airport to San Francisco flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to San Francisco trip
Airlines
![British Airways]()
British Airways
![United Airlines]()
United Airlines
United's Polaris Business Class offers lie-flat seats and Saks Fifth Avenue bedding.
United's Premium Plus offers upgraded comfort with extra legroom and priority check-in.
![Lufthansa]()
Lufthansa
Lufthansa's Allegris cabins enhance comfort with adjustable headrests and slim seat design.
Lufthansa's Sleeper's Row offers extra space with a mattress and blanket for long-haul flights.
![Virgin Atlantic]()
Virgin Atlantic
Virgin's Upper Class features lie-flat beds and a four-course meal for a VIP experience.
Virgin's Economy Delight offers extra legroom and priority boarding for enhanced comfort.
Airports
Our travel experts
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 December 9, 2025.
Get a feel of what it's like to fly with Virgin Atlantic, United Airlines, and Iberia from London Heathrow Airport to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.2
Entertainment
7.5
Boarding
7.7
Food
6.9
Overall
7.5
Comfort
7.3
Reviews
1 / 20
6.0
GoodPratap,Aug 2025
JFK - LHR
Crew
8.2
Entertainment
7.5
Boarding
7.7
Food
6.9
Overall
7.5
Comfort
7.3
Reviews
1 / 20
6.0
GoodPratap,Aug 2025
JFK - LHR
Crew
8.2
Entertainment
7.5
Boarding
7.7
Food
6.9
Overall
7.5
Comfort
7.3
Reviews
1 / 20
6.0
GoodPratap,Aug 2025
JFK - LHR
Crew
8.2
Entertainment
7.5
Boarding
7.7
Food
6.9
Overall
7.5
Comfort
7.3
Reviews
1 / 20
6.0
GoodPratap,Aug 2025
JFK - LHR
Crew
8.2
Entertainment
7.5
Boarding
7.7
Food
6.9
Overall
7.5
Comfort
7.3
Reviews
1 / 20
6.0
GoodPratap,Aug 2025
JFK - LHR
Crew
8.2
Entertainment
7.5
Boarding
7.7
Food
6.9
Overall
7.5
Comfort
7.3
Reviews
1 / 20
6.0
GoodPratap,Aug 2025
JFK - LHR
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.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsRoseville
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Sunnyvale
Santa Clara
San Bruno
Redwood City
Daly City
Vallejo
Hollister
Foster City
Union City
Davis
San Ramon
Burlingame
Milpitas
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Heathrow to San Francisco
See prices for flight routes from nearby airports that may be better suited for you.
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 2,558,603 searches. Data last updated December 9, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$492 | Average$799 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$520 | Average$664 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$520 | Average$953 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$530 | Average$703 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$534 | Average$681 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$545 | Average$668 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$550 | Average$736 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$555 | Average$708 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$567 | Average$730 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$589 | Average$765 | FlexibilityNo cancel fee | On-time71% |