What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

What is the most punctual flight time for London to San Francisco flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

How often are flights from London to San Francisco delayed?

About 15% of weekly flights between London and San Francisco have experienced delays in the past year, with the average delay time being 144 minutes.

Which airline has the best punctuality record on London to San Francisco flights?

Over the last year, Air Canada have had the lowest number of delays on this route, with just 13% of flights being delayed.

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 30m. Scandinavian Airlines provides one of the quickest options available for as low as $616. 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, Finnair ($382), Aer Lingus ($492), and British Airways ($513) offers the cheapest pricing from London Heathrow Airport to San Francisco. Finnair is priced at 43% 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 British Airways, which is currently one of the cheapest options available, starting at $466. SWISS flights start at $478 while deals on United Airlines start at $486 one-way.

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.

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).

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 $2,195, our data shows the cheapest flight currently is $511. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $475 for that flight.

What are the most popular airlines that fly from London Heathrow Airport to San Francisco?

British Airways, United Airlines and Lufthansa are the most popular airlines when flying from London Heathrow Airport to San Francisco.

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.

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 19 daily inbound flights from London Heathrow from 12 different airlines.

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.

$456+ Cheap Flights from London Heathrow Airport to San Francisco

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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 82 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to San Francisco

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$511 (Justfly.com)
One-way from	$456 (Expedia)
Popular in	July
Cheapest in	February
Average price	$670
Good round-trip deal	$632 or less
Good one-way deal	$589 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. 14% potential increase in price ($113 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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 October 24, 2025.

Tue 11/256:30 pmLHR - SFO

1 stop28h 00mTAP AIR PORTUGAL

Wed 12/34:35 pmSFO - LHR

1 stop22h 05mTAP AIR PORTUGAL

Deal found 10/23

$511

Sat 11/86:00 amLHR - SFO

1 stop16h 45mTAP AIR PORTUGAL

Sat 11/154:35 pmSFO - LHR

1 stop36h 05mTAP AIR PORTUGAL

Deal found 10/23

$519

Mon 11/246:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Mon 12/84:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/23

$530

Fri 12/56:00 amLHR - SFO

1 stop18h 05mTAP AIR PORTUGAL

Mon 12/84:35 pmSFO - LHR

1 stop16h 55mTAP AIR PORTUGAL

Deal found 10/23

$531

Thu 11/205:30 pmLHR - SFO

2 stops29h 05mScandinavian Airlines

Fri 12/54:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/22

$540

Sat 11/226:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Sat 12/64:40 pmSFO - LHR

1 stop17h 00mScandinavian Airlines

Deal found 10/23

$551

Wed 11/126:00 amLHR - SFO

1 stop16h 30mTAP AIR PORTUGAL

Wed 1/144:35 pmSFO - LHR

1 stop16h 55mTAP AIR PORTUGAL

Deal found 10/23

$552

Fri 11/216:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Sun 11/304:40 pmSFO - LHR

1 stop17h 00mScandinavian Airlines

Deal found 10/22

$553

Mon 11/106:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Thu 11/134:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/22

$554

Fri 11/76:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Fri 11/144:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/22

$557

Best flights from Heathrow to San Francisco
Discover carefully curated flight deals from Heathrow to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 24, 2025.

Fri 11/76:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Fri 12/54:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/23

$588

Mon 11/249:00 amLHR - SFO

1 stop15h 30mUnited Airlines

Mon 12/89:10 amSFO - LHR

1 stop20h 20mUnited Airlines

Deal found 10/22

$616

Mon 11/2411:40 amLHR - SFO

Nonstop11h 00mDelta

Tue 12/94:30 pmSFO - LHR

Nonstop10h 10mDelta

Deal found 10/23

$650

Fri 3/139:05 pmLHR - SFO

2 stops25h 30mScandinavian Airlines

Sat 3/215:40 pmSFO - LHR

2 stops18h 10mScandinavian Airlines

Deal found 10/22

$607

Mon 11/249:00 amLHR - SFO

1 stop15h 30mUnited Airlines

Sun 11/3012:30 amSFO - LHR

1 stop21h 25mUnited Airlines

Deal found 10/24

$617

Mon 12/86:30 amLHR - SFO

1 stop13h 20mDelta

Wed 12/176:00 amSFO - LHR

1 stop17h 50mDelta

Deal found 10/22

$659

Sun 12/78:30 amLHR - SFO

1 stop36h 10mUnited Airlines

Sun 12/1410:50 pmSFO - LHR

1 stop13h 45mUnited Airlines

Deal found 10/23

$639

Sat 12/69:00 amLHR - SFO

1 stop15h 30mUnited Airlines

Thu 12/1112:50 pmSFO - LHR

Nonstop10h 35mUnited Airlines

Deal found 10/24

$657

Last-minute flights from Heathrow to San Francisco
Discover last-minute flight deals from Heathrow to San Francisco. Data last updated October 24, 2025 and is based on user searches.

Fri 11/76:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Fri 11/144:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/22

$557

Sat 11/86:00 amLHR - SFO

1 stop16h 45mTAP AIR PORTUGAL

Sat 11/154:35 pmSFO - LHR

1 stop36h 05mTAP AIR PORTUGAL

Deal found 10/23

$519

Mon 11/106:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Thu 11/134:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/22

$554

Wed 11/126:00 amLHR - SFO

1 stop16h 30mTAP AIR PORTUGAL

Wed 1/144:35 pmSFO - LHR

1 stop16h 55mTAP AIR PORTUGAL

Deal found 10/23

$552

Thu 11/205:30 pmLHR - SFO

2 stops29h 05mScandinavian Airlines

Fri 12/54:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/22

$540

Fri 11/216:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Sun 11/304:40 pmSFO - LHR

1 stop17h 00mScandinavian Airlines

Deal found 10/22

$553

Sat 11/226:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Sat 12/64:40 pmSFO - LHR

1 stop17h 00mScandinavian Airlines

Deal found 10/23

$551

Mon 11/246:40 amLHR - SFO

1 stop15h 55mScandinavian Airlines

Mon 12/84:40 pmSFO - LHR

1 stop15h 20mScandinavian Airlines

Deal found 10/23

$530

Tue 11/256:30 pmLHR - SFO

1 stop28h 00mTAP AIR PORTUGAL

Wed 12/34:35 pmSFO - LHR

1 stop22h 05mTAP AIR PORTUGAL

Deal found 10/23

$511

One-way flights from Heathrow to San Francisco
Search for one-way flight options from Heathrow to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 24, 2025.

Thu 12/119:00 amLHR - SFO

1 stop15h 30mSWISS

Deal found 10/21

$456

Sat 2/289:50 amLHR - SFO

1 stop13h 45mAer Lingus

Deal found 10/23

$459

Tue 11/186:50 pmLHR - SFO

2 stops27h 40mMultiple Airlines

Deal found 10/23

$460

Tue 11/256:50 pmLHR - SFO

2 stops27h 40mMultiple Airlines

Deal found 10/22

$461

Thu 11/206:50 pmLHR - SFO

2 stops29h 15mMultiple Airlines

Deal found 10/23

$464

Mon 12/156:30 amLHR - SFO

1 stop13h 20mVirgin Atlantic

Deal found 10/24

$465

Sat 11/228:50 pmLHR - SFO

2 stops49h 45mMultiple Airlines

Deal found 10/23

$469

Sat 1/249:00 amLHR - SFO

1 stop15h 30mSWISS

Deal found 10/22

$470

Tue 11/116:50 pmLHR - SFO

2 stops27h 40mMultiple Airlines

Deal found 10/22

$471

Tue 12/99:00 amLHR - SFO

2 stops39h 30mSWISS

Deal found 10/21

$472

Sat 2/78:05 pmLHR - SFO

1 stop28h 25mSWISS

Deal found 10/23

$473

Cheapflights Fare Finder

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

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 11/7

6:40 am-2:35 pm

1 stop15h 55m

San Francisco

Fri 12/5

4:40 pm-4:00 pm

1 stop15h 20m

$588

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Fri 3/13

9:05 pm-3:35 pm

2 stops25h 30m

San Francisco

Sat 3/21

5:40 pm-6:50 pm

2 stops18h 10m

$607

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 11/24

9:00 am-4:30 pm

1 stop15h 30m

San Francisco

Mon 12/8

9:10 am-1:30 pm

1 stop20h 20m

$616

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 11/24

9:00 am-4:30 pm

1 stop15h 30m

San Francisco

Sun 11/30

12:30 am-5:55 am

1 stop21h 25m

$617

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sun 12/7

8:30 am-12:40 pm

1 stop36h 10m

San Francisco

Sun 12/14

10:50 pm-8:35 pm

1 stop13h 45m

$639

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 11/24

11:40 am-2:40 pm

Nonstop11h 00m

San Francisco

Tue 12/9

4:30 pm-10:40 am

Nonstop10h 10m

$650

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 12/6

9:00 am-4:30 pm

1 stop15h 30m

San Francisco

Thu 12/11

12:50 pm-7:25 am

Nonstop10h 35m

$657

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Mon 12/8

6:30 am-11:50 am

1 stop13h 20m

San Francisco

Wed 12/17

6:00 am-7:50 am

1 stop17h 50m

$659

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Sat 2/7

11:25 am-9:44 am

2 stops30h 19m

$466

LondonSan Francisco

LHR - SFO

LHRSFO

London Heathrow

Tue 12/23

6:40 pm-4:30 pm

1 stop29h 50m

$478

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/23

Showing 1-10 of 18 results

Compare providers for flights from Heathrow to San Francisco

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 October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Thrive Travel	Price Accuracy3 stars	Trust Score*1 star
AranGrant	Price Accuracy3 stars	Trust Score*3 stars
oojo	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*1 star
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust 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

Prices

Delays

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 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of $453). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of $613). 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?

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 afternoon.

The best insider tips for London Heathrow Airport to San Francisco flights

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.

SFO

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

Our travel experts

Gabriel Leigh

Expert on British Airways

Harriet Baskas

Expert on United Airlines and SFO

Blane Bachelor

Expert on Lufthansa and Virgin Atlantic

Ramsey Qubein

Expert on LHR

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with Austrian Airlines, 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.

Austrian Airlines

7.6

Good

863 reviews

Reviews

1 / 20

10.0

Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

Austrian Airlines

7.6

Good

863 reviews

Austrian Airlines

7.6

Good

863 reviews

Reviews

1 / 20

10.0

Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

United Airlines

7.4

Good

8,994 reviews

Austrian Airlines

7.6

Good

863 reviews

Reviews

1 / 20

10.0

Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

Iberia

7.0

Good

2,997 reviews

Austrian Airlines

7.6

Good

863 reviews

Reviews

1 / 20

10.0

Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

Lufthansa

6.8

Okay

7,518 reviews

Austrian Airlines

7.6

Good

863 reviews

Reviews

1 / 20

10.0

Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

British Airways

6.7

Okay

7,469 reviews

Austrian Airlines

7.6

Good

863 reviews

Reviews

1 / 20

10.0

Excellent

Andrew,Sep 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

Related info for your journey

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 19 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 15h 30m. Scandinavian Airlines provides one of the quickest options available for as low as $616. 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, Finnair ($382), Aer Lingus ($492), and British Airways ($513) offers the cheapest pricing from London Heathrow Airport to San Francisco. Finnair is priced at 43% 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 British Airways, which is currently one of the cheapest options available, starting at $466. SWISS flights start at $478 while deals on United Airlines start at $486 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 New Zealand (87%), KLM (85%) and Air France (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 $2,195, our data shows the cheapest flight currently is $511. When looking at the most popular route, (London Heathrow - San Francisco), you can expect to pay $475 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of $453). Flying from London Heathrow Airport to San Francisco in July is currently the most expensive (average of $613). 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

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Lodi

San Mateo

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Heathrow to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest$382	Average$581	FlexibilityNo cancel fee	On-time76%
Aer Lingus	Cheapest$492	Average$799	FlexibilityNo cancel fee	On-timeN/A
British Airways	Cheapest$513	Average$666	FlexibilityNo cancel fee	On-time70%
Scandinavian Airlines	Cheapest$520	Average$808	FlexibilityNo cancel fee	On-time77%
Brussels Airlines	Cheapest$530	Average$676	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$538	Average$725	FlexibilityNo cancel fee	On-time72%
Austrian Airlines	Cheapest$539	Average$727	FlexibilityNo cancel fee	On-time78%
United Airlines	Cheapest$541	Average$683	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$545	Average$672	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$555	Average$708	FlexibilityNo cancel fee	On-timeN/A

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$456+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Heathrow to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from London Heathrow to San Francisco are usually found in February or September, booked 82 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap flight deals from Heathrow to San Francisco

Most accurate provider

Most trusted provider

Round-trip from

One-way from

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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 October 24, 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 October 24, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to San Francisco that are best for you.

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 October.

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.

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?

What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

What is the cheapest time of day to fly from LHR to SFO?

How often are flights from London to San Francisco delayed?

What is the most punctual flight time for London to San Francisco flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on London to San Francisco flights?

The best insider tips for London Heathrow Airport to San Francisco flights

Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to San Francisco trip

Airlines

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Airports

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Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with Austrian Airlines, 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.

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?

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

What are the cheapest airlines flying from London Heathrow Airport to San Francisco round-trip?

What are the cheapest airlines to fly from London Heathrow Airport to San Francisco one-way?

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

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

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

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

Can I find deals for business class flights from Heathrow to San Francisco?

What is the cheapest month to book a flight from London Heathrow Airport to San Francisco?

Traveling to a place near San Francisco?

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Alternative routes for Heathrow to San Francisco

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Top 10 airlines flying from Heathrow to San Francisco

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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 October 24, 2025.