฿11,270 Cheap Flights from San Francisco (SFO) to London (LHR)

View ฿11,270 flight on Thu, 11 Dec 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at ฿11,270 for one-way flights and ฿20,120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿20,120 Return, found 2 days ago
฿20,120
Return
found 2 days ago
Select United flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿20,120 found 2 days ago
United
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿20,725 Return, found 2 days ago
฿20,725
Return
found 2 days ago
Select United flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿20,725 found 2 days ago
Delta
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿20,910 Return, found 2 days ago
฿20,910
Return
found 2 days ago
Select Delta flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿20,910 found 2 days ago
United
Fri, 13 Feb - Tue, 17 Feb
SFO
San Francisco
LHR
London
฿21,080 Return, found 2 days ago
฿21,080
Return
found 2 days ago
Select United flight, departing Fri, 13 Feb from San Francisco to London, returning Tue, 17 Feb, priced at ฿21,080 found 2 days ago
United
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿21,155 Return, found 2 days ago
฿21,155
Return
found 2 days ago
Select United flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿21,155 found 2 days ago
United
Thu, 11 Dec - Thu, 25 Dec
SFO
San Francisco
LHR
London
฿21,165 Return, found 14 hours ago
฿21,165
Return
found 14 hours ago
Select United flight, departing Thu, 11 Dec from San Francisco to London, returning Thu, 25 Dec, priced at ฿21,165 found 14 hours ago
United
Thu, 11 Dec - Thu, 25 Dec
SFO
San Francisco
LHR
London
฿21,770 Return, found 14 hours ago
฿21,770
Return
found 14 hours ago
Select United flight, departing Thu, 11 Dec from San Francisco to London, returning Thu, 25 Dec, priced at ฿21,770 found 14 hours ago
Air Canada
Fri, 13 Feb - Tue, 17 Feb
SFO
San Francisco
LHR
London
฿21,900 Return, found 2 days ago
฿21,900
Return
found 2 days ago
Select Air Canada flight, departing Fri, 13 Feb from San Francisco to London, returning Tue, 17 Feb, priced at ฿21,900 found 2 days ago
British Airways
Thu, 11 Dec - Thu, 25 Dec
SFO
San Francisco
LHR
London
฿22,685 Return, found 14 hours ago
฿22,685
Return
found 14 hours ago
Select British Airways flight, departing Thu, 11 Dec from San Francisco to London, returning Thu, 25 Dec, priced at ฿22,685 found 14 hours ago
Lufthansa
Fri, 13 Feb - Tue, 17 Feb
SFO
San Francisco
LHR
London
฿23,030 Return, found 2 days ago
฿23,030
Return
found 2 days ago
Select Lufthansa flight, departing Fri, 13 Feb from San Francisco to London, returning Tue, 17 Feb, priced at ฿23,030 found 2 days ago

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

January is typically the cheapest month to fly

From ฿14,490 - ฿31,077 per traveller.

Graph displaying average flight prices per month

Flight from San Francisco to London route information
Origin airport
San Francisco Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Turkish Airlines, United, WestJet
Return price
฿20,120
Distance
8567 km
Average flight time
18 hours 22 mins

Perfect flights from San Francisco to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from San Francisco to London. 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 San Francisco Intl. to Heathrow ticket options cater to your travel preferences, with incredible one-way fares from ฿11,270 and roundtrip prices from ฿20,120. 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 Heathrow 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 London.

Frequently asked questions

How much is a flight from San Francisco Intl. Airport (SFO) to Heathrow Airport?
Round-trip tickets from San Francisco Intl. Airport (SFO) to London Heathrow start from ฿20,120. This is based on fares offered within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from San Francisco Intl. Airport (SFO) to LHR?
Most flights can be cancelled online, but each air carrier has different 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 SFO to London Heathrow 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 San Francisco Intl. Airport (SFO) to Heathrow Airport (LHR) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from SFO to LHR?
San Francisco to Hounslow is around 8,600 kilometres, so get ready to spend a while in the air. Don't forget to pack all the essentials, from your headphones to your hoodie. Take some snacks to munch on throughout your flight too.
Which airlines fly direct from SFO to London Heathrow?
A popular airline that flies from SFO to LHR is United Airlines (UA). It offers 60 flights a month. After some more options? Check out the airfares with British Airways (BA). This carrier offers 60 monthly flights between these airports.
Are San Francisco Airport to Heathrow Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from San Francisco Intl. Airport (SFO) to London Heathrow can be hit-or-miss. You may be able to score a great bargain, but you could also miss out completely! If you'd prefer to play it safe and start planning your trip early on, Expedia compares flight deals up to a year in advance. Just remember that not all airlines advertise their prices so far in advance. Our advice? Check back often as updates are made frequently.

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