Cheap flights from London to San Francisco from $312
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Francisco departing on 9/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize 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 round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
SWISS flights from London to San Francisco
Our best SWISS deals on London to San Francisco flight tickets
Scandinavian Airlines flights from London to San Francisco
Our best Scandinavian Airlines 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?
If you aren’t able to travel to San Francisco during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $586.
What is the cheapest day to depart on your flight to San Francisco?
The cheapest day to depart from London to San Francisco is on a Thursday when prices can be found for as low as $654. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $764.
What is the cheapest time of day to depart on your flight to San Francisco?
Our data shows that the cheapest London to San Francisco flights are usually those with departure times in the evening. Our users have found flights to San Francisco in the evening for as low as $682. Flights in the afternoon are often more expensive with an average ticket price of $729.
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 15 weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $687 when searching 15 weeks out.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 $624 on momondo.
What cabin class options are available on London to San Francisco flights?
There are 4 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.
What is the cheapest airline that flies from London to San Francisco?
Vueling is the most popular carrier operating from London to San Francisco
What airlines fly to San Francisco?
United Airlines, British Airways and Lufthansa are the top three most popular airlines that fly to San Francisco from London according to our data. United Airlines is the first choice among our users, with 37% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 10 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.
How many flights depart from London to San Francisco on average per day?
The number of flights available between London and San Francisco is 41 per day as of June 2025. The most frequent departure time is 10:00AM, with 59% of daily flights leaving in the afternoon.
How many flights depart from London to San Francisco on average per week?
As of June 2025, 288 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
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 | $312 |
|---|---|
Fastest flight time | 10h 20m |
Direct flights | Every day |
Airports in San Francisco | 1 airport |
How far is London to San Francisco by plane?
A flight from London to San Francisco will travel around 5349.7 mi. In terms of flight time, this usually takes a little over 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 are refreshed on a daily basis.
How many operators does momondo search for flights from London to San Francisco Airport?
There are 10 operators available for flights from London to San Francisco Airport as of June 2025.
How old do you have to be to fly from London to San Francisco Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The required travel and health documents for your San Francisco Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Francisco Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London to San Francisco?
Based on momondo bookings for flights between London and San Francisco, the leading plane model is Boeing 777, making up 36.42% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 27.72%, Airbus A380-800 with 16.94%, and Boeing 777-300ER with 6.68%.
What is the most popular airline from London to San Francisco?
momondo data reveals that the most frequently booked airline on the route from London to San Francisco is British Airways, representing 21% of all bookings. The subsequent popular airlines are United Airlines at 20%, Lufthansa at 13%, and Delta at 9%.
Best airlines flying from London to San Francisco
Compare and see reviews for airlines that fly from London to San Francisco with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $507 | Free Cancellation | Rating 6.6 7,008 reviews | |||
| PriceFrom $539 | Free Cancellation | Rating 7.6 802 reviews | |||
| PriceFrom $544 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $545 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $545 | Free Cancellation | Rating 6.7 7,139 reviews | |||
| PriceFrom $546 | Free Cancellation | Rating 7.4 355 reviews | |||
| PriceFrom $553 | Free Cancellation | Rating 7.4 652 reviews | |||
| PriceFrom $555 | Free Cancellation | Rating 7.3 1,387 reviews | |||
| PriceFrom $555 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $596 | Free Cancellation | Rating 7.0 2,776 reviews |
Delta Flights From London to San Francisco
Delta flies from London to San Francisco around 14 times per week, with 7,950 momondo users rating the airline 8.0/10. The cheapest Delta deal from London to San Francisco in the last 72 hours was $555 (round-trip), much lower than the average airfare cost of $708 for Delta flights on this route.
Austrian Airlines Flights From London to San Francisco
$539 is the best Austrian Airlines flight deal from London to San Francisco found on momondo over the last 72 hours. The average Austrian Airlines ticket price found was closer to $727, however, with flight time and availability significantly affecting the price. Austrian Airlines (7.6/10 from 802 user reviews) flies into San Francisco from London 21 times in an average week so prices can vary.
Traveling 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?
It is quick and easy to find London to San Francisco flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Francisco that suits you.
Can I find flights from London to San Francisco with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to San Francisco from London with this policy.
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 not ready to book a flight from London to San Francisco now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Francisco and let you know when they change.