Cheap flights from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 cheapest month to fly to San Francisco?
The cheapest month to fly to San Francisco from London Heathrow Airport is in February. Flight prices, which tend to average around C$ 775, 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 Heathrow Airport averaging around C$ 807.
What is the cheapest day to depart on your flight to San Francisco?
The cheapest day to depart from London Heathrow Airport 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 Heathrow Airport 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 Heathrow Airport 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 Heathrow to San Francisco flight route?
Fly from London Heathrow to San Francisco for the best London Heathrow - 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 Heathrow Airport 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 Heathrow Airport for as low as C$ 853 on momondo.
What cabin class options are available on London Heathrow to San Francisco flights?
There are 2 cabin classes available to choose from on London Heathrow 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 Heathrow Airport to San Francisco flights?
You could potentially save up to 13% on your flight if you consider stops on a London Heathrow Airport to San Francisco flight.
How have London Heathrow Airport to San Francisco flight prices changed over time?
As of June 2025, prices for London Heathrow Airport to San Francisco flights are approximately 14% more expensive when compared to flights at the same time last year.
How many flights depart from London Heathrow Airport to San Francisco on average per day?
The number of flights available between London Heathrow Airport and San Francisco is 41 per day as of June 2025. The most frequent departure time is 10:00a.m., with 59% of daily flights leaving in the afternoon.
How many flights depart from London Heathrow Airport to San Francisco on average per week?
The number of flights available between London Heathrow Airport and San Francisco is 288 per week as of June 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.
When to book flights from London Heathrow Airport to San Francisco
Cheap London Heathrow Airport to San Francisco (LHR to SFO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport 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 Heathrow to San Francisco by plane?
San Francisco is 8596.0 km away from London Heathrow. 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 Heathrow Airport to San Francisco Airport?
Prices for flights from London Heathrow Airport to San Francisco Airport are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to San Francisco Airport?
As of June 2025, there is 1 operator available to choose from for flights from London Heathrow Airport to San Francisco Airport.
How old do you have to be to fly from London Heathrow Airport 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 Heathrow Airport to San Francisco Airport.
What documentation or ID do you need to fly to San Francisco Airport?
The necessary travel and health documents for your San Francisco Airport 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 license 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 London Heathrow Airport to San Francisco?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport 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%).
What is the most popular airline from London Heathrow Airport to San Francisco?
Based on momondo bookings for flights between London Heathrow Airport and San Francisco, the leading airline is United Airlines, making up 100% of the total bookings.
Best airlines flying from London Heathrow Airport to San Francisco
Compare and see reviews for airlines that fly from London Heathrow Airport 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 Heathrow Airport to San Francisco
United Airlines flies from London Heathrow Airport to San Francisco around 21 times per week, with 8,790 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from London Heathrow Airport to San Francisco in the last 72 hours was C$ 636 (round-trip), much lower than the average airfare cost of C$ 636 for United Airlines flights on this route.
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?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to San Francisco . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from London to San Francisco with flexible booking policies on momondo?
momondo does allow users to show only those flights to San Francisco from London which offer a flexible booking policy as well as other useful filters and features.
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?
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.