A spacious airport terminal with a high ceiling and natural light.

£334 Cheap Flights from London (LHR) to San Francisco (SFO)

View £334 flight on Wed, 11 Nov 2026Opens in a new window

Flight 1

Popular airlines from Heathrow Airport (LHR) to San Francisco International Airport (SFO)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from London (LHR) to San Francisco (SFO)

Prices were available within the past 7 days and start at £334 for one-way flights and £386 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Mon, 15 Feb - Mon, 22 Feb
LHR
London
SFO
San Francisco
£386 Return, found 1 day ago
£386
Return
found 1 day ago
Select Lufthansa flight, departing Mon, 15 Feb from London to San Francisco, returning Mon, 22 Feb, priced at £386 found 1 day ago
Finnair
Fri, 4 Dec - Thu, 24 Dec
LHR
London
SFO
San Francisco
£420 Return, found 5 days ago
£420
Return
found 5 days ago
Select Finnair flight, departing Fri, 4 Dec from London to San Francisco, returning Thu, 24 Dec, priced at £420 found 5 days ago
Alaska Airlines
Mon, 2 Nov - Tue, 26 Jan
LHR
London
SFO
San Francisco
£430 Return, just found
£430
Return
just found
Select Alaska Airlines flight, departing Mon, 2 Nov from London to San Francisco, returning Tue, 26 Jan, priced at £430 just found
KLM
Mon, 2 Nov - Sun, 15 Nov
LHR
London
SFO
San Francisco
£443 Return, found 16 hours ago
£443
Return
found 16 hours ago
Select KLM flight, departing Mon, 2 Nov from London to San Francisco, returning Sun, 15 Nov, priced at £443 found 16 hours ago
Virgin Atlantic
Tue, 3 Nov - Sat, 14 Nov
LHR
London
SFO
San Francisco
£443 Return, just found
£443
Return
just found
Select Virgin Atlantic flight, departing Tue, 3 Nov from London to San Francisco, returning Sat, 14 Nov, priced at £443 just found
Air France
Mon, 2 Nov - Sun, 15 Nov
LHR
London
SFO
San Francisco
£448 Return, found 16 hours ago
£448
Return
found 16 hours ago
Select Air France flight, departing Mon, 2 Nov from London to San Francisco, returning Sun, 15 Nov, priced at £448 found 16 hours ago
Delta
Fri, 6 Nov - Fri, 13 Nov
LHR
London
SFO
San Francisco
£448 Return, found 1 hour ago
£448
Return
found 1 hour ago
Select Delta flight, departing Fri, 6 Nov from London to San Francisco, returning Fri, 13 Nov, priced at £448 found 1 hour ago
TAP Portugal
Fri, 20 Nov - Sat, 28 Nov
LHR
London
SFO
San Francisco
£449 Return, just found
£449
Return
just found
Select TAP Portugal flight, departing Fri, 20 Nov from London to San Francisco, returning Sat, 28 Nov, priced at £449 just found
Swiss International Air Lines
Fri, 6 Nov - Sun, 15 Nov
LHR
London
SFO
San Francisco
£486 Return, just found
£486
Return
just found
Select Swiss International Air Lines flight, departing Fri, 6 Nov from London to San Francisco, returning Sun, 15 Nov, priced at £486 just found
United
Fri, 6 Nov - Fri, 13 Nov
LHR
London
SFO
San Francisco
£488 Return, found 1 hour ago
£488
Return
found 1 hour ago
Select United flight, departing Fri, 6 Nov from London to San Francisco, returning Fri, 13 Nov, priced at £488 found 1 hour ago

Alternative airports near San Francisco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Norman Y. Mineta San Jose Intl. SJC. Cheapest option available. Average driving time to city centre is 50 minutes. Flights from £430
SJC
Norman Y. Mineta San Jose Intl.
Cheapest
Average driving time to city centre50 min
Flights from £430
Select flight to Oakland Intl. OAK. Average driving time to city centre is 26 minutes. Flights from £565
OAK
Oakland Intl.
Average driving time to city centre26 min
Flights from £565

Find the cheapest month to fly from London (LHR) to San Francisco (SFO)

October is typically the cheapest month to fly

From £372 - £417 per traveller.

Frequently asked questions

How much does a flight from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) cost?
You can find cheap one-way flights from £334 and cheap return flights from £386 LHR to SFO with Expedia. One-way flights typically cost between £447 and £3524, and return flights often range between £561 and £5548. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when LHR to SFO ticket fares go up or down.
What is the cheapest month to fly from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.)?
The cheapest months to fly from LHR to SFO are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.)?
There are 3 airlines offering direct flights from London Heathrow (LHR) to San Francisco, CA (SFO-San Francisco Intl.). Here are the carriers:
  • United operates 21 direct flights from London Heathrow (LHR) to San Francisco, CA (SFO-San Francisco Intl.) every week.
  • British Airways operates 14 direct flights from London Heathrow (LHR) to San Francisco, CA (SFO-San Francisco Intl.) every week.
  • Virgin Atlantic operates 11 direct flights from London Heathrow (LHR) to San Francisco, CA (SFO-San Francisco Intl.) every week.
How do I find cheap flights from London (LHR) to San Francisco, CA (SFO)?
To find a cheap flight from London (LHR) to San Francisco, CA (SFO), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.)?
The earliest flight from London Heathrow (LHR) to San Francisco Intl. (SFO) typically departs around 6:00 AM local time. This flight is operated by Air Baltic and Air Canada. This is a seasonal service, active only in April. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.)?
A direct flight from London Heathrow (LHR) to San Francisco, CA (SFO) typically takes around 11 hours, covering a distance of approximately 8,618 kilometers. If you opt for a flight with one stop, your journey will be longer, usually taking about 16 hours 30 minutes. Flights with two or more stops will extend your travel time even further, to around 19 hours. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from London (LHR) to San Francisco, CA (SFO)?
Select the "Business class" and "First class" filters when looking for London (LHR) to San Francisco, CA (SFO) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.)?
A direct, return business class ticket from London Heathrow (LHR) to San Francisco, CA (SFO) typically costs between £5,891 - £12,492. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between London Heathrow (LHR) to San Francisco, CA (SFO) if you opt for a connecting flight.
How do I earn miles on a London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) flight with Expedia?
It's easy to earn miles on a London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Francisco, CA (SFO) from London (LHR)?
If you're planning to travel to San Francisco from Heathrow (LHR), you can fly directly into San Francisco Intl. (SFO). Some flights may connect through major hubs like Humberto Delgado (LIS), Kastrup (CPH), or Frankfurt Intl. (FRA) before reaching San Francisco. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) at the last minute?
Typically, booking a last minute flight from London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package?
Securing a London (LHR-Heathrow) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London (LHR) to San Francisco, CA (SFO)?
If you booked your London (LHR) to San Francisco, CA (SFO) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Heathrow
Destination airport
San Francisco Intl.
Airlines serving
Aer Lingus, Aeromexico, Air Canada, Air France, Alaska Airlines, Austrian Airlines, British Airways, Brussels Airlines, Finnair, ITA Airways, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Return price
£386
Distance
8567 km

Book with confidence

Compare flights from London to San Francisco easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to San Francisco. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to San Francisco Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Heathrow to San Francisco Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Heathrow (LHR) to San Francisco Intl. (SFO)

The easiest way to view the best deals on flights from London to San Francisco today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Heathrow to San Francisco Intl. start at just £386 and range up to £488.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and San Francisco
  • booking your flight during February, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to San Francisco flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to San Francisco Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to San Francisco easily and book with confidence

Explore a world of travel with Expedia

*Available to Expedia members.