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$560+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
ago. 23 — ago. 301
sáb. 8/23
sáb. 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or November, booked 82 days in advance, depart on a Thursday or Wednesday 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 agosto 18, 2025.

Round-trip from

$562
(Air Canada)

Popular in

July

Cheapest in

February

Average price

$826

Good round-trip deal

$634 or less

Good one-way deal

$617 or less
From London Heathrow to San Francisco
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Highest demand for flights based on searches. 14% potential increase in price ($117 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from London Heathrow to San Francisco.
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Price to beat on a one-way flight from London Heathrow to San Francisco.
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Find flight deals from Heathrow to San Francisco

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 agosto 18, 2025.

This Booking.com deal was found by Cheapflights users on 8/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/266:40 amLHR - SFO
1 stop17h 50mScandinavian Airlines
mar. 10/147:40 pmSFO - LHR
2 stops17h 55mScandinavian Airlines
Deal found 8/18$560
This Air Canada deal was found by Cheapflights users on 8/17. 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.
jue. 9/188:40 amLHR - SFO
2 stops18h 58mAir Canada
jue. 12/118:39 amSFO - LHR
1 stop17h 31mAir Canada
Deal found 8/17$562
This United Airlines deal was found by Cheapflights users on 8/17. 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.
sáb. 9/67:25 amLHR - SFO
1 stop15h 05mUnited Airlines
sáb. 9/134:05 pmSFO - LHR
Nonstop10h 20mUnited Airlines
Deal found 8/17$563
This United Airlines deal was found by Cheapflights users on 8/16. 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.
sáb. 8/306:55 amLHR - SFO
1 stop15h 25mUnited Airlines
lun. 9/157:55 pmSFO - LHR
Nonstop10h 15mUnited Airlines
Deal found 8/16$564
This Lufthansa deal was found by Cheapflights users on 8/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/309:30 amLHR - SFO
1 stop14h 25mLufthansa
lun. 9/151:05 pmSFO - LHR
Nonstop10h 20mLufthansa
Deal found 8/16$565
This Lufthansa deal was found by Cheapflights users on 8/18. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/169:30 amLHR - SFO
1 stop14h 30mLufthansa
dom. 9/287:50 pmSFO - LHR
Nonstop10h 20mLufthansa
Deal found 8/18$566
This United Airlines deal was found by Cheapflights users on 8/16. 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.
dom. 9/77:30 amLHR - SFO
1 stop16h 30mUnited Airlines
dom. 9/148:30 amSFO - LHR
1 stop14h 00mUnited Airlines
Deal found 8/16$567
This United Airlines deal was found by Cheapflights users on 8/18. 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.
sáb. 9/67:25 amLHR - SFO
1 stop15h 05mUnited Airlines
mié. 9/172:34 pmSFO - LHR
1 stop13h 46mUnited Airlines
Deal found 8/18$569
This Netflights deal was found by Cheapflights users on 8/17. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/110:45 amLHR - SFO
Nonstop11h 05mBritish Airways
vie. 10/104:30 pmSFO - LHR
Nonstop10h 25mBritish Airways
Deal found 8/17$570
This United Airlines deal was found by Cheapflights users on 8/18. 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.
dom. 9/218:30 amLHR - SFO
1 stop19h 25mUnited Airlines
mar. 9/301:25 pmSFO - LHR
1 stop13h 45mUnited Airlines
Deal found 8/18$571
This Air Canada deal was found by Cheapflights users on 8/17. 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.
mié. 11/266:30 amLHR - SFO
2 stops18h 55mMultiple Airlines
mar. 12/28:39 amSFO - LHR
2 stops18h 41mMultiple Airlines
Deal found 8/17$572

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 agosto 18, 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

sáb. 9/6

7:25 am-2:30 pm

1 stop15h 05m

San Francisco

mié. 9/17

4:05 pm-10:25 am

Nonstop10h 20m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

dom. 1/18

7:40 am-2:50 pm

1 stop15h 10m

San Francisco

dom. 1/25

5:25 pm-12:00 pm

Nonstop10h 35m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

sáb. 9/6

7:25 am-2:30 pm

1 stop15h 05m

San Francisco

sáb. 9/13

7:55 pm-2:10 pm

Nonstop10h 15m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

jue. 1/29

7:40 am-2:50 pm

1 stop15h 10m

San Francisco

mar. 3/3

1:46 pm-11:15 am

1 stop13h 29m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

sáb. 8/30

6:55 am-7:00 pm

1 stop20h 05m

San Francisco

mié. 9/10

7:55 pm-2:10 pm

Nonstop10h 15m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

dom. 11/16

7:40 am-2:50 pm

1 stop15h 10m

San Francisco

lun. 11/24

4:15 pm-1:30 pm

1 stop13h 15m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

dom. 8/31

7:25 am-2:20 pm

1 stop14h 55m

San Francisco

mar. 9/9

7:55 pm-2:10 pm

Nonstop10h 15m

$563

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

vie. 9/19

9:10 pm-3:55 pm

1 stop26h 45m

$572

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

vie. 12/12

6:30 pm-2:45 pm

1 stop28h 15m

$574

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

dom. 9/14

3:05 pm-11:59 pm

3 stops40h 54m

$574

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 16 results
1
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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
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.

Read more about British Airwaysby Gabriel Leigh
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.

Read more about United Airlinesby Harriet Baskas
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.

Read more about Lufthansaby Blane Bachelor
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.

Read more about Virgin Atlanticby Blane Bachelor
Airports
LHR

For a smooth departure from Heathrow, use the Heathrow Express for quick access to central London. It's the fastest way to reach the airport.

Read more about LHRby Ramsey Qubein
SFO

Upon arrival at SFO, use BART for an affordable trip to downtown San Francisco. The journey takes about 40 minutes.

Read more about SFOby Harriet Baskas
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Blane Bachelor

Blane Bachelor

Expert on Lufthansa and Virgin Atlantic

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 August 8, 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 82 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 $358). 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 agosto 18, 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 in the morning.

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 agosto 18, 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).

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 agosto 18, 2025.
Get a feel of what it's like to fly with Delta, 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.
Delta
8.0
Very good
7,981 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Iberia
7.0
Good
2,884 reviews
Delta
8.0
Very good
7,981 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Lufthansa
6.8
Okay
7,330 reviews
Delta
8.0
Very good
7,981 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
British Airways
6.7
Okay
7,277 reviews
Delta
8.0
Very good
7,981 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 11.8 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 42 daily inbound flights from London Heathrow from 10 different airlines.

  • How long is the flight from London Heathrow Airport to San Francisco?

    A quick flight from London Heathrow Airport to San Francisco can take about 15h 05m. United Airlines provides one of the quickest options available for as low as $563. The distance between London Heathrow Airport and San Francisco is about 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?

    According to our current data, British Airways ($508), United Airlines ($540), and Brussels Airlines ($546) offers the cheapest pricing from London Heathrow Airport to San Francisco. British Airways is priced at 24% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from London Heathrow Airport to San Francisco?

    The top 3 most reliable airlines when flying from London Heathrow Airport to San Francisco are KLM (85%), Air France (85%) and Delta (85%).

  • What are the cheapest flights from London Heathrow Airport to San Francisco?

    While on average a flight from London Heathrow Airport to San Francisco is generally $2,044, our data shows the cheapest flight currently is $555. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $436 for that flight.

  • Can I find deals for flights from Heathrow to San Francisco that include hotel bookings?

    Yes. In addition to deals on Heathrow to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Francisco.

  • 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, 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 $358). 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.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Mountain View
Turlock
Santa Clara
Hollister
Antioch
Watsonville
Manteca
Sunnyvale
Newark
Milpitas
Campbell
Foster City
San Leandro
Burlingame
Redwood City
Vallejo

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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.
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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 agosto 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$508Average$655FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$540Average$682FlexibilityNo cancel feeOn-time69%
Brussels AirlinesCheapest$546Average$692FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$550Average$745FlexibilityNo cancel feeOn-time72%
DeltaCheapest$555Average$708FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$564Average$734FlexibilityNo cancel feeOn-time78%
Scandinavian AirlinesCheapest$577Average$808FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$579Average$708FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$594Average$745FlexibilityNo cancel feeOn-time71%
IberiaCheapest$596Average$761FlexibilityNo cancel feeOn-time77%

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