Cheap flights from San Francisco to London from £146
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to London departing on 14/8. 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, 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 San Francisco to London
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
KLM flights from San Francisco to London
Our best KLM deals on San Francisco to London flight tickets
United Airlines flights from San Francisco to London
Our best United Airlines deals on San Francisco to London flight tickets
See travel insights to London from
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 cheapest month to fly to London?
The cheapest month to fly to London from San Francisco is in October. Flight prices, which tend to average around £467, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from San Francisco averaging around £486.
What is the cheapest day to depart on your flight to London?
Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £497. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from San Francisco to London for around £677.
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 afternoon when flights can be purchased for as low as £570. Flights at midday are often more expensive, with an average ticket price of £793.
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 £571 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 £545 on momondo.
What cabin class options are available on San Francisco to London flights?
There are 4 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.
What is the cheapest airline that flies from San Francisco to London?
TAP AIR PORTUGAL, SWISS, and Lufthansa are the most popular carriers operating from San Francisco to London
Which airlines fly to London?
Virgin Atlantic, United Airlines and British Airways are the top three most popular airlines that fly to London from San Francisco according to our data. Virgin Atlantic is the first choice among our users, with 37% of people opting to fly with this airline when travelling to London. Keep in mind that there are 8 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
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?
As of June 2025, there are 294 flights per week flying from San Francisco to London. The most common day of the week flights depart is Mon, with 14% of flights 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?
A flight from San Francisco to London will travel around 5349.7 mi. A reasonable flight in good conditions will take 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 were last updated today.
How many operators does momondo search for flights from San Francisco Airport to London?
There are 8 operators available for flights from San Francisco Airport to London as of June 2025.
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 layovers 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 travel and health documents required for your trip to London 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 London. 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 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%.
What is the most popular airline from San Francisco to London?
Based on momondo bookings for flights between San Francisco and London, the leading airline is Virgin Atlantic, making up 29% of the total bookings. Other popular airlines include United Airlines with 24%, British Airways with 16%, and Lufthansa with 14%.
Best airlines flying from San Francisco to London
Compare and see reviews for airlines that fly from San Francisco to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £386 | Free Cancellation | Rating 7.1 1,885 reviews | |||
| PriceFrom £416 | Free Cancellation | Rating 7.4 652 reviews | |||
| PriceFrom £422 | Free Cancellation | Rating 7.0 2,776 reviews | |||
| PriceFrom £425 | Free Cancellation | Rating 6.6 7,011 reviews | |||
| PriceFrom £429 | Free Cancellation | Rating 7.1 9,539 reviews | |||
| PriceFrom £437 | Free Cancellation | Rating 7.8 1,358 reviews | |||
| PriceFrom £452 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom £476 | Free Cancellation | Rating 6.7 7,139 reviews |
KLM Flights From San Francisco to London
The lowest priced KLM flight from San Francisco to London from the last 72 hours was £594. Generally, KLM has 14 flights on this route every week with an average price of £675. KLM is rated 7.8/10 by our users.
Virgin Atlantic Flights From San Francisco to London
The best Virgin Atlantic deal for San Francisco to London flight tickets found on momondo in the last 72 hours was £566, round-trip. It should be noted that an average Virgin Atlantic flight deal for this route in this time was higher, at £754 round-trip. Virgin Atlantic operates 14 flights out of San Francisco into London in an average week, so prices vary by time and availability. 652 Virgin Atlantic reviews by users on momondo have scored the airline at 7.4/10.
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 compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Francisco to London . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from San Francisco to London with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to London from San Francisco with this policy.
How can momondo help me find flights from San Francisco to London?
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 London from San Francisco.
I’m not ready to book a flight from San Francisco to London right now. Can momondo alert me if prices change?
If you are not ready to book a flight from San Francisco to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.