Cheap flights from San Francisco to London from $218
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 7/31. 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 and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize 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 round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Delta flights from San Francisco to London
Our best Delta deals on San Francisco to London flight tickets
Iberia flights from San Francisco to London
Our best Iberia 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 $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 $837. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $977. 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 afternoon is the least expensive time of day to depart. momondo users have found prices as low as $869 when looking at flights departing in the afternoon. Flights to London are more costly in the morning, with an average ticket price of $975. Departure times in the morning 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 20 weeks ahead of your departure date. In general, you can expect to find flights to London for around $781 when searching 20 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 $767 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.
What is the cheapest airline that flies from San Francisco to London?
TAP AIR PORTUGAL, Iberia, and Finnair 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 44% of people opting to fly with this airline when traveling to London. Keep in mind that there are 19 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?
42 flights are operational daily from San Francisco to London as of April 2025. The most popular departure time for this route is 7:00PM, with 67% of flights per day taking off in the afternoon.
How many flights depart from San Francisco to London on average per week?
As of April 2025, 294 flights take off from San Francisco and land in London each week. The most common flight departure day for this route is Mon, with 14% 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 15m.
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 19 operators available for flights from San Francisco Airport to London as of April 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 30.59% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 25.01%, Airbus A380-800 with 21.35%, and Boeing 787 Dreamliner with 7.78%.
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 32% of the total bookings. Other popular airlines include British Airways with 17%, Iberia with 13%, 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 $290 | Free Cancellation | Rating 6.6 6,835 reviews | |||
| PriceFrom $324 | Free Cancellation | Rating 7.3 1,349 reviews | |||
| PriceFrom $428 | Free Cancellation | Rating 7.1 1,850 reviews | |||
| PriceFrom $465 | Free Cancellation | Rating 7.6 1,275 reviews | |||
| PriceFrom $541 | Free Cancellation | Rating 7.5 1,588 reviews | |||
| PriceFrom $554 | Free Cancellation | Rating 8.0 7,929 reviews | |||
| PriceFrom $572 | Free Cancellation | Rating 7.0 2,698 reviews | |||
| PriceFrom $584 | Free Cancellation | Rating 7.3 2,922 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.0 1,076 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.2 10,000 reviews |
Delta Flights From San Francisco to London
The lowest priced Delta flight from San Francisco to London from the last 72 hours was $554. Generally, Delta has 14 flights on this route every week with an average price of $845. Delta is rated 8.0/10 by our users.
Alaska Airlines Flights From San Francisco to London
Alaska Airlines (8.0/10 from 9,961 reviews) operates around 14 flights from San Francisco to London in any given week. The average Alaska Airlines airfare for this route is around $1,830, 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.