Cheap flights from San Francisco to London from $181
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
Our best TAP AIR PORTUGAL deals on San Francisco to London flight tickets
Scandinavian Airlines flights from San Francisco to London
Our best Scandinavian Airlines deals on San Francisco to London flight tickets
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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?
The cheapest month to fly to London from San Francisco is in October. Flight prices, which tend to average around $634, 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 $659.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from San Francisco to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $812. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $947. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.
What is the cheapest time of day to depart on your flight to London?
Flying to London from San Francisco in the evening is the least expensive time of day to depart. momondo users have found prices as low as $855 when looking at flights departing in the evening. Flights to London are more costly at noon, with an average ticket price of $990. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
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 weeks ahead of your departure date. In general, you can expect to find flights to London 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 from San Francisco for as low as $725 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 17% 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 July 2025, prices for San Francisco to London flights are approximately 34% 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 and Iberia are the most popular carriers operating from San Francisco to London
What airlines fly to London?
United Airlines, British Airways and Iberia are the top three most popular airlines that fly to London 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. Keep in mind that there are 18 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?
38 flights are operational daily from San Francisco to London as of July 2025. The most popular departure time for this route is 4:00PM, with 58% of flights per day taking off in the afternoon.
How many flights depart from San Francisco to London on average per week?
As of July 2025, 269 flights take off from San Francisco and land in London each week. The most common flight departure day for this route is Mon, with 16% of weekly 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?
London is 5349.7 mi away from San Francisco. In terms of flight time, this usually takes a little over 10h 20m.
When did momondo last update prices for flights from San Francisco Airport to London?
Prices for flights from San Francisco Airport to London refresh daily.
How many operators does momondo search for flights from San Francisco Airport to London?
There are 18 operators available for flights from San Francisco Airport to London as of July 2025.
How old do you have to be to fly from San Francisco Airport to London?
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 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?
Based on momondo bookings for flights between San Francisco and London, the leading plane model is Boeing 777, making up 29.98% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 26.71%, Airbus A380-800 with 17.04%, and Boeing 787 Dreamliner with 10.16%.
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 United Airlines, making up 31% of the total bookings. Other popular airlines include British Airways with 18%, Iberia with 14%, and Virgin Atlantic with 10%.
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 $334 | Free Cancellation | Rating 7.3 1,416 reviews | |||
| PriceFrom $487 | Free Cancellation | Rating 7.1 1,912 reviews | |||
| PriceFrom $514 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom $555 | Free Cancellation | Rating 7.5 1,654 reviews | |||
| PriceFrom $572 | Free Cancellation | Rating 7.0 2,819 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 7.8 1,366 reviews | |||
| PriceFrom $588 | Free Cancellation | Rating 6.8 7,207 reviews |
Delta Flights From San Francisco to London
The lowest priced Delta flight from San Francisco to London from the last 72 hours was $593. Generally, Delta has 13 flights on this route every week with an average price of $808. Delta is rated 8.0/10 by our users.
Alaska Airlines Flights From San Francisco to London
Alaska Airlines (8.0/10 from 10,000 reviews) operates around 10 flights from San Francisco to London 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 flight searches in the last 72 hours.
Traveling 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?
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 London from San Francisco.
Can I find flights from San Francisco to London with flexible booking policies on momondo?
All flight searches from San Francisco to London on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from San Francisco to London?
momondo provides multiple filters to help you find the best flight to London from San Francisco. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
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.