Cheap flights from San Francisco to London from $242
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 8/4. 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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TAP AIR PORTUGAL flights from San Francisco to London Heathrow Airport
Our best TAP AIR PORTUGAL deals on San Francisco to London Heathrow Airport flight tickets
Scandinavian Airlines flights from San Francisco to London Heathrow Airport
Our best Scandinavian Airlines deals on San Francisco to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from San Francisco to London Heathrow Airport
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 Heathrow Airport?
The month of October is, on average, the cheapest month to fly to London Heathrow Airport from San Francisco, with most prices found around $637. If you’re not able to fly to London Heathrow Airport in October, then February is your next best option. Flight prices from San Francisco to London Heathrow Airport during February average around $668.
What is the cheapest day to depart on your flight to London Heathrow Airport?
Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $813. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $947.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from San Francisco to London Heathrow Airport in the evening for as low as $855. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $990.
What is the cheapest San Francisco to London Heathrow flight route?
Fly from San Francisco to London Heathrow for the best San Francisco - London Heathrow flight prices
How far in advance should I book a flight to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $775 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Francisco for as low as $725 on momondo.
What cabin class options are available on San Francisco to London Heathrow flights?
There are 4 cabin classes available to choose from on San Francisco to London Heathrow 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 San Francisco to London Heathrow?
TAP AIR PORTUGAL, Iberia, and WestJet are the most popular carriers operating from San Francisco to London Heathrow
What airlines fly to London Heathrow Airport?
United Airlines, British Airways and Iberia are the top three most popular airlines that fly to London Heathrow Airport from San Francisco according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 18 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from San Francisco to London Heathrow Airport on average per day?
The number of flights available between San Francisco and London Heathrow Airport is 39 per day as of July 2025. The most frequent departure time is 4:00PM, with 58% of daily flights leaving in the afternoon.
How many flights depart from San Francisco to London Heathrow Airport on average per week?
As of July 2025, 279 flights take off from San Francisco and land in London Heathrow Airport each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.
When to book flights from San Francisco to London Heathrow Airport
Cheap San Francisco to London Heathrow Airport (SFO to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Francisco to London Heathrow Airport
How far is San Francisco to London Heathrow by plane?
London Heathrow is 5341.3 mi away from San Francisco. Typically, this will take 10h 20m by plane in normal conditions.
When did momondo last update prices for flights from San Francisco Airport to London Heathrow Airport?
Prices for flights from San Francisco Airport to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from San Francisco Airport to London Heathrow Airport?
There are 18 operators available for flights from San Francisco Airport to London Heathrow Airport as of July 2025.
How old do you have to be to fly from San Francisco Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow 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 San Francisco to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from San Francisco to London Heathrow Airport is Boeing 777 (29.98% of total bookings). The next most popular plane models are Boeing 787-9 Dreamliner (26.71%), Airbus A380-800 (17.04%), and Boeing 787 Dreamliner (10.16%).
What is the most popular airline from San Francisco to London Heathrow Airport?
Based on momondo bookings for flights between San Francisco and London Heathrow Airport, the leading airline is United Airlines, making up 33% of the total bookings. Other popular airlines include British Airways with 20%, Iberia with 12%, and Virgin Atlantic with 10%.
Best airlines flying from San Francisco to London Heathrow Airport
Compare and see reviews for airlines that fly from San Francisco to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $334 | Free Cancellation | Rating 7.3 1,416 reviews | |||
| PriceFrom $487 | Free Cancellation | Rating 7.1 1,908 reviews | |||
| PriceFrom $555 | Free Cancellation | Rating 7.5 1,654 reviews | |||
| PriceFrom $572 | Free Cancellation | Rating 7.0 2,820 reviews | |||
| PriceFrom $573 | Free Cancellation | Rating 7.6 1,306 reviews | |||
| PriceFrom $580 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $584 | Free Cancellation | Rating 7.3 2,916 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.8 1,367 reviews | |||
| PriceFrom $588 | Free Cancellation | Rating 6.8 7,207 reviews |
Delta Flights From San Francisco to London Heathrow Airport
Delta flight deals from San Francisco to London Heathrow Airport start from $593 round-trip. Over the 11 Delta flights for this route in a normal week, average airfare is usually $808 round-trip - but some users have found much cheaper deals with momondo.
Alaska Airlines Flights From San Francisco to London Heathrow Airport
Alaska Airlines (8.0/10 from 10,000 reviews) operates around 14 flights from San Francisco to London Heathrow Airport in any given week. The average Alaska Airlines airfare for this route is around $936, with deals from around $789 rare but found on momondo. Referenced prices are for round-trip San Francisco to London Heathrow Airport flight searches in the last 72 hours.
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Why should I use momondo to find a flight deal from San Francisco to London?
It is quick and easy to find San Francisco to London 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 London that suits you.
Can I find flights from San Francisco to London with flexible booking policies on momondo?
Flights from San Francisco to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from San Francisco to London?
momondo helps you find the best flight between San Francisco and London 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 San Francisco to London right now. Can momondo alert me if prices change?
Yes. momondo can track prices for San Francisco to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.