฿12,740 Cheap Flights from London (LHR) to San Francisco (SFO)

View ฿12,740 flight on Wed, 3 Sep 2025Opens 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 ฿12,740 for one-way flights and ฿20,085 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿20,085 Return, found 16 hours ago
฿20,085
Return
found 16 hours ago
Select TAP Portugal flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿20,085 found 16 hours ago
American Airlines
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿20,100 Return, found 16 hours ago
฿20,100
Return
found 16 hours ago
Select American Airlines flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿20,100 found 16 hours ago
Delta
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿20,100 Return, found 16 hours ago
฿20,100
Return
found 16 hours ago
Select Delta flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿20,100 found 16 hours ago
Virgin Atlantic
Sat, 30 Aug - Mon, 15 Sep
LHR
London
SFO
San Francisco
฿20,195 Return, found 2 days ago
฿20,195
Return
found 2 days ago
Select Virgin Atlantic flight, departing Sat, 30 Aug from London to San Francisco, returning Mon, 15 Sep, priced at ฿20,195 found 2 days ago
Iberia
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿20,205 Return, found 16 hours ago
฿20,205
Return
found 16 hours ago
Select Iberia flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿20,205 found 16 hours ago
Delta
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿20,285 Return, found 16 hours ago
฿20,285
Return
found 16 hours ago
Select Delta flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿20,285 found 16 hours ago
Iberia
Wed, 3 Sep - Tue, 23 Sep
LHR
London
SFO
San Francisco
฿21,220 Return, found 17 hours ago
฿21,220
Return
found 17 hours ago
Select Iberia flight, departing Wed, 3 Sep from London to San Francisco, returning Tue, 23 Sep, priced at ฿21,220 found 17 hours ago
British Airways
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿21,245 Return, found 16 hours ago
฿21,245
Return
found 16 hours ago
Select British Airways flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿21,245 found 16 hours ago
KLM
Wed, 3 Sep - Mon, 22 Sep
LHR
London
SFO
San Francisco
฿21,275 Return, found 16 hours ago
฿21,275
Return
found 16 hours ago
Select KLM flight, departing Wed, 3 Sep from London to San Francisco, returning Mon, 22 Sep, priced at ฿21,275 found 16 hours ago
United
Fri, 13 Feb - Tue, 17 Feb
LHR
London
SFO
San Francisco
฿21,290 Return, found 4 days ago
฿21,290
Return
found 4 days ago
Select United flight, departing Fri, 13 Feb from London to San Francisco, returning Tue, 17 Feb, priced at ฿21,290 found 4 days ago

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

January is typically the cheapest month to fly

From ฿15,173 - ฿31,174 per traveller.

Graph displaying average flight prices per month

Flight from London to San Francisco route information
Origin airport
Heathrow
Destination airport
San Francisco Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, WestJet
Return price
฿20,085
Distance
8567 km
Average flight time
3 hours 2 mins

Perfect flights from London to San Francisco

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from London to San Francisco. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of San Francisco, surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Heathrow to San Francisco Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿12,740 and roundtrip prices from ฿20,085. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at San Francisco Intl. and explore San Francisco and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your LHR to SFO travel arrangements today and embark on the journey of a lifetime in San Francisco.

Frequently asked questions

How much is a flight from Heathrow Airport to San Francisco Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price available for a round-trip flight between LHR and San Francisco Intl. Airport (SFO) was ฿20,085. Great fares don't last long, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from London Heathrow to San Francisco Intl. Airport (SFO)?
Most flights can be cancelled online, but each airline has its own set of terms and conditions. If you do have to cancel your flight, go to our Customer Service Portal and follow the instructions.
How do I find cheap flights from Heathrow Airport (LHR) to SFO that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for London Heathrow to San Francisco Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Heathrow Airport to San Francisco Intl. Airport (SFO)?
With around 8,600 kilometres separating Heathrow Airport (LHR) and SFO, your flight will be a long one. Pack wisely to make your journey comfortable. Simple things like warm clothing and some noise-cancelling headphones can make a huge difference.
Which airlines fly direct from London Heathrow to SFO?
United Airlines (UA) is one of the preferred choices for travellers jetting between LHR and San Francisco Intl. Airport (SFO). Take your pick of the 60 flights it operates on this route each month. You could also check out the fares on offer with British Airways (BA). This carrier operates 60 flights a month between Hounslow and San Francisco.
Are Heathrow Airport to San Francisco Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices from Heathrow Airport to San Francisco Airport are available up to 12 months prior to departure on Expedia. And although you may pick up a fantastic last-minute deal, it's not something you should bank on. Also, booking your flights ahead of time means you'll have more choices — and you can avoid being wedged in the dreaded middle seat! We're always updating our fares to make sure you get the biggest bargains, so check back often for all the latest specials.

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