San Francisco

$600+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
Jul 23 — Jul 301
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 81 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap 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 June 23, 2026.

This Air Canada deal was found by Cheapflights users on 6/23. 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.
Fri 11/63:00 pm
LHR
-
SFO
2 stops18h 16m
Multiple Airlines
Fri 11/209:00 am
SFO
-
LHR
2 stops18h 20m
Multiple Airlines
Deal found 6/23$642
This American Airlines deal was found by Cheapflights users on 6/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:45 am
LHR
-
SFO
Nonstop11h 05m
American Airlines
Thu 10/14:35 pm
SFO
-
LHR
Nonstop10h 25m
American Airlines
Deal found 6/23$643
This Kiwi.com deal was found by Cheapflights users on 6/23. 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.
Tue 7/78:05 pm
LHR
-
SFO
1 stop28h 10m
Multiple Airlines
Tue 7/141:00 pm
SFO
-
LHR
Nonstop10h 25m
Multiple Airlines
Deal found 6/23$644
This Air Canada deal was found by Cheapflights users on 6/19. 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.
Tue 6/305:40 pm
LHR
-
SFO
2 stops25h 41m
Air Canada
Mon 7/61:25 pm
SFO
-
LHR
1 stop33h 10m
Air Canada
Deal found 6/19$646
This Justfly.com deal was found by Cheapflights users on 6/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/19:30 am
LHR
-
SFO
1 stop20h 21m
Multiple Airlines
Wed 7/221:00 pm
SFO
-
LHR
Nonstop10h 25m
Multiple Airlines
Deal found 6/22$647
This British Airways deal was found by Cheapflights users on 6/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/279:15 am
LHR
-
SFO
1 stop19h 35m
British Airways
Wed 7/111:37 am
SFO
-
LHR
1 stop17h 08m
British Airways
Deal found 6/20$648
This British Airways deal was found by Cheapflights users on 6/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:05 pm
LHR
-
SFO
1 stop23h 16m
British Airways
Thu 7/3010:09 am
SFO
-
LHR
1 stop16h 41m
British Airways
Deal found 6/19$649
This American Airlines deal was found by Cheapflights users on 6/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/299:15 am
LHR
-
SFO
1 stop18h 45m
American Airlines
Sun 7/127:30 pm
SFO
-
LHR
Nonstop10h 25m
American Airlines
Deal found 6/21$650
This ChecknFly deal was found by Cheapflights users on 6/20. 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.
Thu 7/98:00 am
LHR
-
SFO
1 stop17h 19m
Lufthansa
Sun 7/268:10 am
SFO
-
LHR
1 stop17h 50m
Lufthansa
Deal found 6/20$651
This oojo deal was found by Cheapflights users on 6/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:00 pm
LHR
-
SFO
Nonstop11h 00m
Lufthansa
Sat 9/57:50 pm
SFO
-
LHR
Nonstop10h 20m
Lufthansa
Deal found 6/18$652
This Cheapflightsfares deal was found by Cheapflights users on 6/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:30 am
LHR
-
SFO
2 stops18h 25m
Lufthansa
Sun 7/127:15 pm
SFO
-
LHR
1 stop15h 25m
Lufthansa
Deal found 6/23$653
This British Airways deal was found by Cheapflights users on 6/21. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:20 am
LHR
-
SFO
1 stop23h 49m
British Airways
Sun 7/127:30 pm
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 6/21$654

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 June 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$642
(lastminute.com)

One-way from

$600
(KAYAK)

Popular in

December

Cheapest in

February

Average price

$782

Good round-trip deal

$743 or less

Good one-way deal

$613 or less
Provider with most accurate pricing for London Heathrow-San Francisco flight deals.
Provider most trusted by Cheapflights users for London Heathrow-San Francisco flights.
From London Heathrow to San Francisco
One-way flight from London Heathrow to San Francisco
Highest demand for flights based on searches. 0% potential increase in price ($6 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Average for round-trip flights in June 2026
Price to beat on a round-trip flight from London Heathrow to San Francisco.
Price to beat on a one-way flight from London Heathrow to San Francisco.

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 June 23, 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 round-trip

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 7/10

7:30 am-11:02 pm

2 stops23h 32m

San Francisco

Fri 7/17

7:50 pm-2:10 pm

Nonstop10h 20m

$679
Quickest round-trip

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 8/21

6:30 am-11:45 am

1 stop13h 15m

San Francisco

Tue 8/25

5:55 pm-12:15 pm

Nonstop10h 20m

$686

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 9/7

9:05 pm-2:40 pm

2 stops25h 35m

San Francisco

Mon 9/21

4:45 pm-4:25 pm

2 stops15h 40m

$742

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 12/19

11:35 am-7:35 am

2 stops28h 00m

San Francisco

Sat 12/26

5:00 am-9:40 am

1 stop20h 40m

$746

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 7/20

11:25 am-9:38 pm

2 stops18h 13m

San Francisco

Mon 7/27

7:50 pm-2:10 pm

Nonstop10h 20m

$746

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 7/21

7:45 am-9:30 pm

2 stops21h 45m

San Francisco

Tue 7/28

4:50 pm-11:10 am

Nonstop10h 20m

$746

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 7/5

9:15 am-12:59 am

1 stop23h 44m

San Francisco

Thu 12/17

12:41 pm-12:15 pm

1 stop15h 34m

$834

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 7/5

9:15 am-12:59 am

1 stop23h 44m

San Francisco

Mon 12/14

8:35 pm-3:10 pm

Nonstop10h 35m

$834

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 7/18

4:40 pm-8:47 am

2 stops24h 07m

San Francisco

Fri 7/31

5:00 am-7:55 am

1 stop18h 55m

$934

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 12/20

5:25 pm-4:30 pm

2 stops31h 05m

San Francisco

Sun 12/27

7:25 pm-9:25 pm

2 stops18h 00m

$945

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy-Trust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London Heathrow Airport-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London Heathrow Airport-San Francisco flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

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 80 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 $573). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of $868). 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 June 23, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to San Francisco as you normally would.

How much does it cost to fly round-trip from London Heathrow Airport to San Francisco?

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
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

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.

Harriet Baskas

Harriet Baskas

Expert on United Airlines and SFO

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.

Blane Bachelor

Blane Bachelor

Expert on Lufthansa and Virgin Atlantic

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.

Ramsey Qubein

Ramsey Qubein

Expert on LHR

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.

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 June 23, 2026.
Get a feel of what it's like to fly with Delta,Virgin Atlantic, andUnited Airlines 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.

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

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

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

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

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

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

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

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

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

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

Entertainment

7.8

Crew

8.5

Comfort

7.8

Food

7.2

Boarding

8.1

Overall

7.8

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 11.0 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 39 daily inbound flights from London Heathrow from 12 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 13h 15m. United Airlines provides one of the quickest options available for as low as $686. 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, TAP AIR PORTUGAL ($449), Aer Lingus ($506), and Austrian Airlines ($514) offers the cheapest pricing from London Heathrow Airport to San Francisco. TAP AIR PORTUGAL is priced at 37% 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 $370. Aer Lingus flights start at $429 while deals on Finnair start at $460 one-way.

  • 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 Air Canada (87%), Austrian Airlines (87%) and United Airlines (87%).

  • 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 $1,699, our data shows the cheapest flight currently is $484. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $541 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of $573). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of $868). 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
South San Francisco
Santa Clara
Santa Cruz
Fairfield
Burlingame
Rancho Cordova
Roseville
Cupertino
Emeryville
Watsonville
Newark
San Bruno
Hayward
San Ramon
San Carlos
Redwood City
Turlock
Daly City
Sunnyvale
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$449Average$500FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$506Average$760FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$514Average$693FlexibilityNo cancel feeOn-time78%
Scandinavian AirlinesCheapest$520Average$751FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$531Average$670FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$538Average$827FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$552Average$746FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$555Average$829FlexibilityNo cancel feeOn-time69%
DeltaCheapest$557Average$838FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$589Average$843FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.