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.
$529+ Cheap flights from Heathrow (LHR) to San Francisco (SFO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
May 4 — May 111
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 November, booked 83 days in advance, depart on a Wednesday or Thursday and return on a Wednesday
Cheap 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 April 29, 2025.
Most accurate provider | AranGrant 3 stars |
|---|---|
Most trusted provider | AranGrant 3 stars |
Round-trip from | $530 (TravelUp) |
Popular in | July |
Cheapest in | February |
Average price | $636 |
Good round-trip deal | $654 or less |
Good one-way deal | $650 or less |
Find 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 April 29, 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 April 29, 2025.
This Expedia deal was found by Cheapflights users on 4/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:00 amLHR - SFO
1 stop16h 30mTAP AIR PORTUGAL
Thu 10/234:20 pmSFO - LHR
1 stop18h 30mTAP AIR PORTUGAL
Deal found 4/27![TAP AIR PORTUGAL logo]()
$529
This TravelUp deal was found by Cheapflights users on 4/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/138:45 amLHR - SFO
1 stop15h 25mMultiple Airlines
Sun 5/1812:55 pmSFO - LHR
Nonstop10h 30mMultiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$530
This ChecknFly deal was found by Cheapflights users on 4/28. 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 ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/108:40 amLHR - SFO
1 stop15h 30mLufthansa
Wed 9/177:55 pmSFO - LHR
Nonstop10h 15mLufthansa
Deal found 4/28![Lufthansa logo]()
$532
This oojo deal was found by Cheapflights users on 4/28. 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.
Wed 9/246:40 amLHR - SFO
1 stop17h 50mScandinavian Airlines
Thu 10/27:40 pmSFO - LHR
1 stop14h 00mScandinavian Airlines
Deal found 4/28![Scandinavian Airlines logo]()
$534
This lol.travel deal was found by Cheapflights users on 4/28. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/511:45 amLHR - SFO
1 stop32h 00mVirgin Atlantic
Sun 5/114:05 pmSFO - LHR
Nonstop10h 20mVirgin Atlantic
Deal found 4/28![Virgin Atlantic logo]()
$543
This TravelUp deal was found by Cheapflights users on 4/28. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:40 amLHR - SFO
1 stop16h 10mBritish Airways
Thu 9/184:35 pmSFO - LHR
Nonstop10h 25mBritish Airways
Deal found 4/28![British Airways logo]()
$548
This SWISS deal was found by Cheapflights users on 4/27. 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.
Sat 5/106:00 amLHR - SFO
1 stop18h 10mSWISS
Tue 5/1311:35 amSFO - LHR
2 stops20h 50mSWISS
Deal found 4/27![SWISS logo]()
$549
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/59:00 amLHR - SFO
1 stop18h 00mUnited Airlines
Sun 5/1112:55 pmSFO - LHR
1 stop12h 45mUnited Airlines
Deal found 4/28![United Airlines logo]()
$550
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/88:40 amLHR - SFO
2 stops19h 30mAir Canada
Mon 5/128:15 amSFO - LHR
2 stops17h 20mAir Canada
Deal found 4/28![Air Canada logo]()
$553
This World Air Fares deal was found by Cheapflights users on 4/28. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:30 amLHR - SFO
2 stops20h 27mFinnair
Wed 9/242:37 pmSFO - LHR
1 stop13h 38mFinnair
Deal found 4/28![Finnair logo]()
$554
This TravelUp deal was found by Cheapflights users on 4/27. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1311:15 amLHR - SFO
Nonstop11h 00mAir France
Sun 5/189:20 pmSFO - LHR
Nonstop10h 20mAir France
Deal found 4/27![Air France logo]()
$561
This Austrian Airlines deal was found by Cheapflights users on 4/28. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:35 amLHR - SFO
Nonstop11h 05mAustrian Airlines
Tue 9/167:55 pmSFO - LHR
Nonstop10h 15mAustrian Airlines
Deal found 4/28![Austrian Airlines logo]()
$583
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 April 29, 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
Tue 5/13
8:45 am-4:10 pm
1 stop15h 25m
San Francisco
Sun 5/18
12:55 pm-7:25 am
Nonstop10h 30m
$530
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Thu 5/8
8:40 am-4:10 pm
1 stop15h 30m
San Francisco
Thu 5/15
8:29 am-11:50 am
1 stop19h 21m
$532
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Mon 5/5
11:45 am-11:45 am
1 stop32h 00m
San Francisco
Sun 5/11
4:05 pm-10:25 am
Nonstop10h 20m
$543
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sat 5/10
8:45 am-4:10 pm
1 stop15h 25m
San Francisco
Tue 5/13
7:30 pm-7:20 pm
1 stop15h 50m
$549
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Mon 5/5
9:00 am-7:00 pm
1 stop18h 00m
San Francisco
Sun 5/11
12:55 pm-9:40 am
1 stop12h 45m
$550
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Thu 5/8
8:40 am-8:10 pm
2 stops19h 30m
San Francisco
Mon 5/12
8:15 am-9:35 am
2 stops17h 20m
$553
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Tue 5/13
11:15 am-2:15 pm
Nonstop11h 00m
San Francisco
Sun 5/18
9:20 pm-3:40 pm
Nonstop10h 20m
$561
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Mon 5/5
10:45 am-1:50 pm
Nonstop11h 05m
San Francisco
Sun 5/18
7:30 pm-1:55 pm
Nonstop10h 25m
$573
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Mon 5/5
2:45 pm-9:00 pm
1 stop14h 15m
San Francisco
Sat 5/10
11:57 pm-6:15 am
2 stops22h 18m
$595
LondonSan Francisco
LHR - SFO
LHRSFO
London Heathrow
Sat 5/3
12:20 pm-3:25 pm
Nonstop11h 05m
San Francisco
Sat 5/10
7:00 am-5:55 am
1 stop14h 55m
$616
Showing 1-10 of 26 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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on London Heathrow Airport-San Francisco flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.
The best insider tips for London Heathrow Airport to San Francisco flights
Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to San Francisco trip
Airlines
![United Airlines]()
United Airlines
![British Airways]()
British Airways
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.
![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
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
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 April 25, 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 83 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of $276). Flying from London Heathrow Airport to San Francisco in June is currently the most expensive (average of $393). 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 April 29, 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 3% versus a flight at noon.
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 April 29, 2025.
The most flights from LHR to SFO are scheduled on a Monday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (42 on average).
Rainfall in San Francisco by month
Plan your trip to San Francisco by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.
Temperature in San Francisco by month
Plan your trip to San Francisco by taking into account the average temperature totals by month.
If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).
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 April 29, 2025.
Get a feel of what it's like to fly with Delta, Air New Zealand and Finnair from London to San Francisco by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Comfort
7.9
Overall
8.0
Boarding
8.2
Food
7.3
Entertainment
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Comfort
7.9
Overall
8.0
Boarding
8.2
Food
7.3
Entertainment
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Comfort
7.9
Overall
8.0
Boarding
8.2
Food
7.3
Entertainment
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Comfort
7.9
Overall
8.0
Boarding
8.2
Food
7.3
Entertainment
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Comfort
7.9
Overall
8.0
Boarding
8.2
Food
7.3
Entertainment
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Crew
8.5
Comfort
7.9
Overall
8.0
Boarding
8.2
Food
7.3
Entertainment
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
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 London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsRoseville
Mountain View
Santa Cruz
Turlock
Livermore
South San Francisco
Fairfield
Manteca
Richmond
Watsonville
Hollister
Milpitas
Antioch
Sausalito
Vallejo
Newark
Hayward
Alameda
Sunnyvale
Campbell
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 April 29, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$382 | Average$581 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$500 | Average$710 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$513 | Average$643 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$519 | Average$708 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$542 | Average$734 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$546 | Average$653 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$552 | Average$709 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$553 | Average$743 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$555 | Average$843 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$571 | Average$704 | FlexibilityNo cancel fee | On-time69% |