฿13,650 Cheap Flights from London (LHR) to San Francisco (SFO)

View ฿13,650 flight on Mon, 2 Feb 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 ฿13,650 for one-way flights and ฿17,875 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿17,875 Return, found 8 hours ago
฿17,875
Return
found 8 hours ago
Select United flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿17,875 found 8 hours ago
TAP Portugal
Mon, 19 Jan - Mon, 2 Feb
LHR
London
SFO
San Francisco
฿17,940 Return, found 3 days ago
฿17,940
Return
found 3 days ago
Select TAP Portugal flight, departing Mon, 19 Jan from London to San Francisco, returning Mon, 2 Feb, priced at ฿17,940 found 3 days ago
United
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,030 Return, found 8 hours ago
฿18,030
Return
found 8 hours ago
Select United flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,030 found 8 hours ago
American Airlines
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,055 Return, found 8 hours ago
฿18,055
Return
found 8 hours ago
Select American Airlines flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,055 found 8 hours ago
Lufthansa
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,085 Return, found 8 hours ago
฿18,085
Return
found 8 hours ago
Select Lufthansa flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,085 found 8 hours ago
British Airways
Sun, 14 Jun - Fri, 19 Jun
LHR
London
SFO
San Francisco
฿18,400 Return, just found
฿18,400
Return
just found
Select British Airways flight, departing Sun, 14 Jun from London to San Francisco, returning Fri, 19 Jun, priced at ฿18,400 just found
Finnair
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,440 Return, found 8 hours ago
฿18,440
Return
found 8 hours ago
Select Finnair flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,440 found 8 hours ago
Austrian Airlines
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,495 Return, found 8 hours ago
฿18,495
Return
found 8 hours ago
Select Austrian Airlines flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,495 found 8 hours ago
Lufthansa
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,495 Return, found 8 hours ago
฿18,495
Return
found 8 hours ago
Select Lufthansa flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,495 found 8 hours ago
Iberia
Sat, 27 Dec - Sat, 10 Jan
LHR
London
SFO
San Francisco
฿18,610 Return, found 8 hours ago
฿18,610
Return
found 8 hours ago
Select Iberia flight, departing Sat, 27 Dec from London to San Francisco, returning Sat, 10 Jan, priced at ฿18,610 found 8 hours ago

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

November is typically the cheapest month to fly

From ฿15,108 - ฿24,052 per traveller.

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 ฿17,875. 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.

Travel information

Origin airport
Heathrow
Destination airport
San Francisco Intl.
Return price
฿17,875
Distance
8567 km
Average flight time
3 hours 13 mins

Book with confidence

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 , 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 ฿13,650 and roundtrip prices from ฿17,875. 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 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 to travel arrangements today and embark on the journey of a lifetime in San Francisco.
Perfect flights from London to San Francisco
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