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$550+ 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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
Aug 12 — Aug 191
Wed 8/12
Wed 8/19
1 adult, Economy
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Find cheap flights from Heathrow to San Francisco with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

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Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 23 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 July 13, 2026.

This deal was found by Cheapflights users on 7/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:45 am
LHR
-
SFO
Nonstop11h 05m
British Airways
Mon 10/194:35 pm
SFO
-
LHR
Nonstop10h 25m
British Airways
Deal found 7/9$604
This deal was found by Cheapflights users on 7/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:40 am
LHR
-
SFO
1 stop16h 00m
Scandinavian Airlines
Sat 9/54:45 pm
SFO
-
LHR
1 stop17h 45m
Scandinavian Airlines
Deal found 7/9$607
This Ticket deal was found by Cheapflights users on 7/13. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:40 am
LHR
-
SFO
1 stop15h 35m
Multiple Airlines
Sun 9/67:50 pm
SFO
-
LHR
Nonstop10h 20m
Multiple Airlines
Deal found 7/13$610
This Gotogate deal was found by Cheapflights users on 7/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:00 am
LHR
-
SFO
1 stop15h 30m
SWISS
Tue 12/17:25 pm
SFO
-
LHR
1 stop15h 50m
SWISS
Deal found 7/11$623
This Gotogate deal was found by Cheapflights users on 7/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/49:00 am
LHR
-
SFO
1 stop15h 30m
SWISS
Mon 11/97:25 pm
SFO
-
LHR
1 stop14h 25m
SWISS
Deal found 7/12$624
This Gotogate deal was found by Cheapflights users on 7/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:40 am
LHR
-
SFO
1 stop15h 35m
SWISS
Wed 10/217:35 pm
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 7/11$625
This Expedia deal was found by Cheapflights users on 7/13. 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 9/178:45 am
LHR
-
SFO
1 stop15h 30m
SWISS
Sun 9/207:35 pm
SFO
-
LHR
1 stop14h 15m
SWISS
Deal found 7/13$626
This TravelUp deal was found by Cheapflights users on 7/10. 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 9/110:50 am
LHR
-
SFO
1 stop16h 10m
Lufthansa
Sat 10/311:50 pm
SFO
-
LHR
Nonstop10h 35m
Lufthansa
Deal found 7/10$627
This TravelUp deal was found by Cheapflights users on 7/11. 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 9/110:50 am
LHR
-
SFO
1 stop16h 10m
Lufthansa
Sat 9/191:50 pm
SFO
-
LHR
1 stop14h 05m
Lufthansa
Deal found 7/11$628
This Ticket deal was found by Cheapflights users on 7/10. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:30 am
LHR
-
SFO
1 stop14h 45m
Lufthansa
Sat 9/51:00 pm
SFO
-
LHR
Nonstop10h 25m
Lufthansa
Deal found 7/10$629

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 July 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$604

One-way from

$550
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$821

Good round-trip deal

$624 or less

Good one-way deal

$580 or less
Provider with most accurate pricing for London Heathrow-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for London Heathrow-San Francisco flights.
Search Deals
From London Heathrow to San Francisco
Search Deals
One-way flight from London Heathrow to San Francisco
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to San Francisco.
Search Deals
Price to beat on a one-way flight from London Heathrow to San Francisco.
Search Deals

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 July 13, 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

Thu 8/27

7:25 am-2:20 pm

1 stop14h 55m

San Francisco

Tue 9/8

12:38 pm-10:10 am

1 stop13h 32m

$661

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Wed 9/2

8:40 am-4:15 pm

1 stop15h 35m

San Francisco

Tue 10/6

2:25 pm-6:30 pm

2 stops20h 05m

$690

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 11/8

9:00 am-4:30 pm

1 stop15h 30m

San Francisco

Sun 11/15

7:25 pm-9:25 pm

2 stops18h 00m

$690

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 8/21

2:50 pm-9:14 pm

1 stop14h 24m

San Francisco

Sat 9/5

1:15 pm-10:40 am

1 stop13h 25m

$700

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 8/21

10:35 am-1:35 pm

Nonstop11h 00m

San Francisco

Sun 9/6

12:35 pm-12:35 pm

1 stop16h 00m

$714

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 10/17

1:00 pm-4:00 pm

Nonstop11h 00m

San Francisco

Mon 10/26

4:25 pm-1:30 pm

1 stop14h 05m

$715

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 9/6

2:25 pm-11:45 pm

1 stop17h 20m

San Francisco

Fri 10/23

4:35 pm-11:00 am

Nonstop10h 25m

$756

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 12/22

3:20 pm-11:04 pm

1 stop15h 44m

San Francisco

Tue 1/5

5:35 pm-11:50 am

1 stop34h 15m

$801

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Thu 8/20

8:05 pm-4:35 pm

1 stop28h 30m

San Francisco

Sun 8/23

7:35 pm-9:30 pm

2 stops17h 55m

$809

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 7/25

8:00 am-7:24 pm

1 stop19h 24m

San Francisco

Sat 8/1

6:05 am-6:45 am

1 stop16h 40m

$876

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 24 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 July.
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

*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 22 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 $584). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of $869). 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 July 13, 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.

Read more
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.

Read more
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.

Read more
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.

Read more

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 July 13, 2026.
Get a feel of what it's like to fly with Virgin Atlantic,United Airlines, andAmerican 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.
Virgin Atlantic
7.5
Good
693 reviews

Food

6.9

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
693 reviews
Virgin Atlantic
7.5
Good
693 reviews

Food

6.9

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,983 reviews
Virgin Atlantic
7.5
Good
693 reviews

Food

6.9

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
American Airlines
7.1
Good
11,812 reviews
Virgin Atlantic
7.5
Good
693 reviews

Food

6.9

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,130 reviews
Virgin Atlantic
7.5
Good
693 reviews

Food

6.9

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,106 reviews
Virgin Atlantic
7.5
Good
693 reviews

Food

6.9

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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 40 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 14h 55m. United Airlines provides one of the quickest options available for as low as $661. 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 Scandinavian Airlines ($520) 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 $430 while deals on British Airways start at $458 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 (83%), Austrian Airlines (83%) and United Airlines (83%).

  • 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 $2,362, our data shows the cheapest flight currently is $458. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $623 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 $584). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of $869). 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
Newark
Watsonville
San Bruno
Hayward
San Ramon
Redwood City
San Carlos
Turlock
Vallejo
San Lorenzo
Davis

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 July 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$449Average$500FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$506Average$805FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$520Average$751FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$531Average$693FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$532Average$673FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$538Average$827FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$552Average$744FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$555Average$828FlexibilityNo cancel feeOn-time69%
DeltaCheapest$557Average$827FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$589Average$843FlexibilityNo cancel feeOn-time71%

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