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United Airlines flights from San Francisco to London
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KLM flights from San Francisco to London
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How to get the cheapest flight ticket from San Francisco to London
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 San Francisco and London?
What is the cheapest month to fly to London?
If you aren’t able to travel during the month of October, then book flights to London from San Francisco during September instead. Flights to London in September, while not as cheap as those in October, still average around $1,014.
What is the cheapest day to depart on your flight to London?
Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as $1,000. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to London for around $2,134.
What is the cheapest time of day to depart on your flight to London?
The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as $1,021. In contrast, the most expensive time of day to depart to London is in the afternoon when prices are around $1,174.
What is the cheapest San Francisco to London flight route?
Fly from San Francisco to London Heathrow for the best San Francisco - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from San Francisco when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,191 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Francisco for as low as $1,137 on momondo.
What cabin class options are available on San Francisco to London flights?
There are 3 cabin classes available to choose from on San Francisco to London 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 San Francisco to London flights?
You could potentially save up to 34% on your flight if you consider stops on a San Francisco to London flight.
How have San Francisco to London flight prices changed over time?
As of June 2025, prices for San Francisco to London flights are approximately 15% more expensive when compared to flights at the same time last year.
How many flights depart from San Francisco to London on average per day?
The number of flights available between San Francisco and London is 42 per day as of June 2025. The most frequent departure time is 16:00, with 59% of daily flights leaving in the afternoon.
How many flights depart from San Francisco to London on average per week?
294 flights are operational weekly from San Francisco to London as of June 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.
When to book flights from San Francisco to London
Cheap San Francisco to London (SFO to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to London
How far is San Francisco to London by plane?
London is 8609.4 km away from San Francisco. By plane, this route typically takes 10h 15m.
When did momondo last update prices for flights from San Francisco Airport to London?
Prices for flights from San Francisco Airport to London are updated daily.
How old do you have to be to fly from San Francisco Airport to London?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Francisco Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from San Francisco to London?
momondo data reveals that the most frequently booked plane model on the route from San Francisco to London is Boeing 777, representing 30.43% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 25.81%, Airbus A380-800 at 18.32%, and Boeing 787 Dreamliner at 9.53%.
Travelling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from San Francisco to London?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Francisco to London. momondo saves you time and could save you money on your trip.
Can I find flights from San Francisco to London with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for San Francisco to London flights to just show those with flexible booking policies.
How can momondo help me find flights from San Francisco to London?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Francisco to London.
I’m not ready to book a flight from San Francisco to London right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to London from San Francisco. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.