Question 1

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

Accepted Answer

Cheapflights users have booked flights from London Heathrow Airport to San Francisco round-trip from C$ 731. Other airlines that can offer you cheap pricing are Delta, from C$ 733, and TAP AIR PORTUGAL, from C$ 737. British Airways is currently priced 22% below the average price you’ll pay for this route.

Question 2

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

Accepted Answer

To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at C$ 820. Aer Lingus flights start at C$ 875 while deals on British Airways start at C$ 912 one-way.

Question 3

How far ahead should I book a flight from London Heathrow Airport to San Francisco?

Accepted Answer

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to San Francisco, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Question 4

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to San Francisco (average of C$ 276). Flying from London Heathrow Airport to San Francisco in December is currently the most expensive (average of C$ 368). 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.

Question 5

What is the cheapest day to fly from London Heathrow Airport to San Francisco?

Accepted Answer

Travelers seeking maximum savings on their London Heathrow Airport to San Francisco flight should consider departing on Thursday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

Weekly flight availability from London Heathrow Airport to San Francisco

Accepted Answer

The most flights from LHR to SFO are scheduled on a Monday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Question 8

E

Accepted Answer

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Question 9

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

Accepted Answer

Looking for the cheapest flight from London Heathrow Airport to San Francisco? While on average our users pay C$ 2,111, our data indicates the cheapest price to be C$ 712. The most popular route (London Heathrow - San Francisco), is priced around C$ 809.

Question 10

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

Accepted Answer

Consider Air Canada (90%), Austrian Airlines (90%) or United Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to San Francisco.

Question 11

What is the cheapest day to fly round-trip from London Heathrow Airport to San Francisco?

Accepted Answer

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 119% on your flight compared to booking on days when demand is much higher.

Question 12

How far in advance should I book a flight from London Heathrow Airport to San Francisco?

Accepted Answer

Users have found that booking a flight from London Heathrow Airport to San Francisco at least 8 days early can save you up to 15% on average compared to booking a flight this week. If booking 8 days before your flight isn’t an option for you, users have found flights from London Heathrow Airport to San Francisco for as little as C$ 833 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as C$ 975 for flights departing within the next 3 days.

Question 13

What is the cheapest month to fly from London Heathrow Airport to San Francisco?

Accepted Answer

The best pricing can be found in the month of February. Prices to San Francisco from London Heathrow Airport average C$ 929. You can even find prices in February for less than C$ 929, as users have found deals to San Francisco from as low as C$ 621. The month of August appears to be one of the more expensive times to travel to San Francisco from London Heathrow Airport. Flying in the targeted month can save you up to 33%.

Question 14

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

Accepted Answer

Unlike in the afternoon, when flights are generally more expensive, you can save up to 41% on flights from London Heathrow Airport to San Francisco by exploring options for tickets at noon.

Question 15

What airport do you fly into for flights to San Francisco from London Heathrow?

Accepted Answer

For a flight from London Heathrow to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 19.0 km from the centre of the city. San Francisco is the only San Francisco airport and it handles 41 inbound flights from London Heathrow per day. 1 airline has flights to San Francisco from London Heathrow on a regular basis.

Question 16

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

Accepted Answer

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

Question 17

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

Accepted Answer

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.

Question 18

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

Accepted Answer

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.

Question 19

How does Cheapflights help users find flights from Heathrow to San Francisco?

Accepted Answer

Cheapflights makes it easy to find Heathrow to San Francisco flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Question 20

Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 21

Can Cheapflights find flights from Heathrow to San Francisco with no change fees?

Accepted Answer

Yes, we can. To see specific flights from Heathrow to San Francisco with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 22

Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?

Accepted Answer

Yes, Cheapflights offers price alerts on Heathrow to San Francisco flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

Round-trip from	C$ 731
Popular in	August
Cheapest in	February
Average price	C$ 930
Good round-trip deal	C$ 712 or less
Good one-way deal	C$ 2,939 or less

Cheap flights from London Heathrow Airport to San Francisco from C$ 731

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.

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 Tuesday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to San Francisco

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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 12 June 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 12 June 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.

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?

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 9 June 2025.

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?

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 12 June 2025.

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 12 June 2025.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with Delta, KLM and Austrian Airlines from London to San Francisco by reading reviews from past customers. You can also see how each airline compares 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?

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?

Travelling to a place near London Heathrow Airport?

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Complete your trip

Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.

Top airline flying from Heathrow to San Francisco

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Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Francisco?

Can Cheapflights find flights from Heathrow to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to San Francisco become cheaper?

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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 12 June 2025.