Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London to San Francisco
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Virgin Atlantic flights from London to San Francisco
Our best Virgin Atlantic deals on London to San Francisco flight tickets
British Airways flights from London to San Francisco
Our best British Airways deals on London to San Francisco flight tickets
See travel insights to San Francisco from
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 typical price of a round-trip flight between London and San Francisco?
What is the cheapest month to fly to San Francisco?
The cheapest month to fly to San Francisco from London is in February. Flight prices, which tend to average around €491, are often lower during this time because this is during the off-season. 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 €499.
What is the cheapest day to depart on your flight to San Francisco?
On average, the least expensive day to fly to San Francisco from London is on a Monday. momondo users have found tickets for Monday departures for as low as €498. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €1,189.
What is the cheapest time of day to depart on your flight to San Francisco?
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 €512. 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 €920 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.
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?
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 €583 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 €530 on momondo.
What cabin class options are available on London to San Francisco flights?
There are 1 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?
You could potentially save up to 68% on your flight if you consider stops on a London to San Francisco flight.
How have London to San Francisco flight prices changed over time?
As of July 2025, prices for London to San Francisco flights are approximately 25% more expensive when compared to flights at the same time last year.
How many flights depart from London to San Francisco on average per day?
As of July 2025, there are 41 flights per day flying from London to San Francisco. The most common time of day flights depart is 10:00, with 59% of flights taking off in the afternoon.
How many flights depart from London to San Francisco on average per week?
As of July 2025, there are 288 flights per week flying from London to San Francisco. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.
When to book flights from London to San Francisco
Cheap London to San Francisco (LON to SFO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to San Francisco
Best price found | €489 |
|---|---|
Fastest flight time | 10h 20m |
Direct flights | Every day |
Airports in San Francisco | 1 airport |
How far is London to San Francisco by plane?
The straight-line distance from London to San Francisco is 8609.4 km. By plane, this route typically takes 10h 20m.
When did momondo last update prices for flights from London to San Francisco Airport?
Prices for flights from London to San Francisco Airport were last updated today.
How old do you have to be to fly from London to San Francisco Airport?
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.
What documentation or ID do you need to fly to San Francisco Airport?
The travel and health documents you'll need for your trip to San Francisco Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at San Francisco Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London to San Francisco?
momondo data reveals that the most frequently booked plane model on the route from London to San Francisco is Boeing 777, representing 36.42% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 29.12%, Airbus A380-800 at 15.30%, and Boeing 787 Dreamliner at 6.89%.
Travelling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from London to San Francisco?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to San Francisco for you.
Can I find flights from London to San Francisco with flexible booking policies on momondo?
All flight searches from London to San Francisco on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from London to San Francisco?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Francisco from London.
I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?
If you are simply researching potential flights to San Francisco, momondo offers a useful price alert feature which will track prices for flights to San Francisco from London and alert you when they change.