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£329 Cheap Flights from London (LHR) to San Francisco (SFO)

View £329 flight on Fri, 30 Oct 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £329 for one-way flights and £410 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Mon, 2 Nov - Fri, 6 Nov
LHR
London
SFO
San Francisco
£410 Return, found 1 day ago
£410
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, 2 Nov from London to San Francisco, returning Fri, 6 Nov, priced at £410 found 1 day ago
Lufthansa
Tue, 27 Oct - Thu, 29 Oct
LHR
London
SFO
San Francisco
£414 Return, found 10 hours ago
£414
Return
found 10 hours ago
Select Lufthansa flight, departing Tue, 27 Oct from London to San Francisco, returning Thu, 29 Oct, priced at £414 found 10 hours ago
Swiss International Air Lines
Tue, 22 Sept - Tue, 6 Oct
LHR
London
SFO
San Francisco
£415 Return, found 5 hours ago
£415
Return
found 5 hours ago
Select Swiss International Air Lines flight, departing Tue, 22 Sept from London to San Francisco, returning Tue, 6 Oct, priced at £415 found 5 hours ago
United
Mon, 2 Nov - Thu, 5 Nov
LHR
London
SFO
San Francisco
£427 Return, found 2 hours ago
£427
Return
found 2 hours ago
Select United flight, departing Mon, 2 Nov from London to San Francisco, returning Thu, 5 Nov, priced at £427 found 2 hours ago
British Airways
Fri, 6 Nov - Sat, 21 Nov
LHR
London
SFO
San Francisco
£435 Return, just found
£435
Return
just found
Select British Airways flight, departing Fri, 6 Nov from London to San Francisco, returning Sat, 21 Nov, priced at £435 just found
Lufthansa
Wed, 11 Nov - Wed, 18 Nov
LHR
London
SFO
San Francisco
£437 Return, found 3 hours ago
£437
Return
found 3 hours ago
Select Lufthansa flight, departing Wed, 11 Nov from London to San Francisco, returning Wed, 18 Nov, priced at £437 found 3 hours ago
Delta
Tue, 10 Nov - Wed, 18 Nov
LHR
London
SFO
San Francisco
£441 Return, found 10 hours ago
£441
Return
found 10 hours ago
Select Delta flight, departing Tue, 10 Nov from London to San Francisco, returning Wed, 18 Nov, priced at £441 found 10 hours ago
Virgin Atlantic
Fri, 20 Nov - Fri, 27 Nov
LHR
London
SFO
San Francisco
£443 Return, just found
£443
Return
just found
Select Virgin Atlantic flight, departing Fri, 20 Nov from London to San Francisco, returning Fri, 27 Nov, priced at £443 just found
Air France
Sun, 22 Nov - Thu, 3 Dec
LHR
London
SFO
San Francisco
£446 Return, found 13 hours ago
£446
Return
found 13 hours ago
Select Air France flight, departing Sun, 22 Nov from London to San Francisco, returning Thu, 3 Dec, priced at £446 found 13 hours ago
KLM
Sun, 11 Oct - Sun, 18 Oct
LHR
London
SFO
San Francisco
£447 Return, found 1 hour ago
£447
Return
found 1 hour ago
Select KLM flight, departing Sun, 11 Oct from London to San Francisco, returning Sun, 18 Oct, priced at £447 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. Average driving time to city centre is 50 minutes. Flights from £547
SJC
Norman Y. Mineta San Jose Intl.
Average driving time to city centre50 min
Flights from £547
Select flight to Oakland Intl. OAK. Cheapest option available. Average driving time to city centre is 26 minutes. Flights from £516
OAK
Oakland Intl.
Cheapest
Average driving time to city centre26 min
Flights from £516

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

October is typically the cheapest month to fly

From £397 - £435 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 £329 and cheap return flights from £410 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

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, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic, WestJet
Return price
£410
Distance
8567 km
Average flight time
3 hours 1 min

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 £410 and range up to £447.  

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 November, 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

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*Available to Expedia members.