Cheap flights from London to San Francisco from C$ 660
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from London to San Francisco departing on 23/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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 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 C$ 790, are often lower during this time because this is during the off-season. The month of November is another great option to travel to San Francisco, with average flight prices from London averaging around C$ 801.
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 Wednesday. Travellers who choose to depart for San Francisco on a Wednesday will often find tickets for as low as C$ 841. On the other hand, Saturday 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 C$ 1,845.
What is the cheapest time of day to depart on your flight to San Francisco?
Flying to San Francisco from London at noon is the least expensive time of day to depart. momondo users have found prices as low as C$ 870 when looking at flights departing at noon. In contrast, the most expensive time of day to depart to San Francisco is in the afternoon when prices are around C$ 1,463.
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 C$ 939 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 C$ 853 on momondo.
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?
You could potentially save up to 13% 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 June 2025, prices for London to San Francisco flights are approximately 5% cheaper 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 June 2025, 41 flights take off from London and land in San Francisco each day. The most common flight departure time for this route is 10:00a.m., with 59% of daily flights taking off in the afternoon.
How many flights depart from London to San Francisco on average per week?
288 flights are operational weekly from London to San Francisco as of June 2025. The most popular departure day for this route is Mon, with 15% of flights per week 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 | C$ 727 |
|---|---|
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 distance between London and San Francisco is about 8609.4 km. Flights usually cover this in 10h 20m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to San Francisco Airport?
Prices for flights from London to San Francisco Airport refresh daily.
How many operators does momondo search for flights from London to San Francisco Airport?
The number of operators available for flights from London to San Francisco Airport is 1 as of June 2025.
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 layovers. 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 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 license, 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.
What is the most popular plane model from London to San Francisco?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London to San Francisco is Boeing 777 (36.42% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (27.72%), Airbus A380-800 (16.94%), and Boeing 777-300ER (6.68%).
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 C$ 870 | Free Cancellation | Rating 7.4 8,790 reviews |
United Airlines Flights From London to San Francisco
United Airlines flight deals from London to San Francisco start from C$ 636 round-trip. Over the 21 United Airlines flights for this route in a normal week, average airfare is usually C$ 636 round-trip - but some users have found much cheaper deals with momondo.
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?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to San Francisco from London.
Can I find flights from London to San Francisco with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for London to San Francisco flights to just show those with flexible booking policies.
How can momondo help me find flights from London to San Francisco?
momondo helps you find the best flight between London and San Francisco by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from London to San Francisco right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of London to San Francisco flights. All you need is a valid email address and we will do the rest; it is that quick and easy.