Question 1

Can stopping save me money on London to San Francisco flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between London to San Francisco.

Question 2

What is the cheapest time of day to depart on your flight to San Francisco?

Accepted Answer

According to our data, the cheapest time of day to fly to San Francisco is in the morning. momondo users have found flights departing from London to San Francisco in the morning for as low as $1,985. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $2,130 on average. Flights to San Francisco from London in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Question 3

What is the cheapest London to San Francisco flight route?

Accepted Answer

Fly from London Heathrow to San Francisco for the best London - San Francisco flight prices

Question 4

What is the cheapest airline that flies from London to San Francisco?

Accepted Answer

LEVEL and TAP AIR PORTUGAL are the most popular carriers operating from London to San Francisco

Question 5

How far in advance should I book a flight to San Francisco?

Accepted Answer

You are more likely to see cheaper flights to San Francisco from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $1,054 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from London for as low as $970 on momondo.

Question 6

What cabin class options are available on London to San Francisco flights?

Accepted Answer

There are 2 cabin classes available to choose from on London to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 7

How have London to San Francisco flight prices changed over time?

Accepted Answer

As of August 2025, prices for London to San Francisco flights are approximately 59% more expensive when compared to flights at the same time last year.

Question 8

What is the cheapest day to depart on your flight to San Francisco?

Accepted Answer

According to our data, Wednesday is the cheapest day to fly to San Francisco from London. The lowest ticket price found for a Wednesday departure recently was $1,004. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London to San Francisco for around $2,557.

Question 9

What is the cheapest month to fly to San Francisco?

Accepted Answer

If you aren’t able to travel during the month of February, then book flights to San Francisco from London during November instead. Flights to San Francisco in November, while not as cheap as those in February, still average around $908.

Question 10

How many flights depart from London to San Francisco on average per day?

Accepted Answer

As of August 2025, there are 42 flights per day flying from London to San Francisco. The most common time of day flights depart is 10:00, with 58% of flights taking off in the afternoon.

Question 11

How many flights depart from London to San Francisco on average per week?

Accepted Answer

As of August 2025, 295 flights take off from London and land in San Francisco each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

Question 12

When did momondo last update prices for flights from London to San Francisco Airport?

Accepted Answer

Prices for flights from London to San Francisco Airport refresh daily.

Question 13

How old do you have to be to fly from London to San Francisco Airport?

Accepted Answer

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London to San Francisco Airport.

Question 14

What documentation or ID do you need to fly to San Francisco Airport?

Accepted Answer

The travel and health documents required for your trip to San Francisco Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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How to get the cheapest flight ticket from London to San Francisco

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Francisco?

If you aren’t able to travel during the month of February, then book flights to San Francisco from London during November instead. Flights to San Francisco in November, while not as cheap as those in February, still average around $908.

What is the cheapest day to depart on your flight to San Francisco?

What is the cheapest time of day to depart on your flight to San Francisco?

What is the cheapest London to San Francisco flight route?

Fly from London Heathrow to San Francisco for the best London - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

What cabin class options are available on London to San Francisco flights?

There are 2 cabin classes available to choose from on London to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to San Francisco flights?

No. A direct flight is the cheapest option for a flight between London to San Francisco.

How have London to San Francisco flight prices changed over time?

As of August 2025, prices for London to San Francisco flights are approximately 59% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from London to San Francisco?

LEVEL and TAP AIR PORTUGAL are the most popular carriers operating from London to San Francisco

How many flights depart from London to San Francisco on average per day?

As of August 2025, there are 42 flights per day flying from London to San Francisco. The most common time of day flights depart is 10:00, with 58% of flights taking off in the afternoon.

How many flights depart from London to San Francisco on average per week?

As of August 2025, 295 flights take off from London and land in San Francisco each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.

When to book flights from London to San Francisco

How far is London to San Francisco by plane?

When did momondo last update prices for flights from London to San Francisco Airport?

How old do you have to be to fly from London to San Francisco Airport?

What documentation or ID do you need to fly to San Francisco Airport?

What is the most popular plane model from London to San Francisco?

Travelling to a place near San Francisco?

Why use momondo?

Why should I use momondo to find a flight deal from London to San Francisco?

Can I find flights from London to San Francisco with flexible booking policies on momondo?

How can momondo help me find flights from London to San Francisco?

I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?

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