฿7,550 Cheap Flights from San Francisco (SFO) to London (LHR)

View ฿7,550 flight on Sat, 15 Nov 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 ฿7,550 for one-way flights and ฿17,905 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, 1 Oct - Wed, 8 Oct
SFO
San Francisco
LHR
London
฿17,905 Return, found 6 days ago
฿17,905
Return
found 6 days ago
Select British Airways flight, departing Wed, 1 Oct from San Francisco to London, returning Wed, 8 Oct, priced at ฿17,905 found 6 days ago
TAP Portugal
Wed, 1 Oct - Wed, 8 Oct
SFO
San Francisco
LHR
London
฿19,330 Return, found 6 days ago
฿19,330
Return
found 6 days ago
Select TAP Portugal flight, departing Wed, 1 Oct from San Francisco to London, returning Wed, 8 Oct, priced at ฿19,330 found 6 days ago
United
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿20,120 Return, found 1 day ago
฿20,120
Return
found 1 day ago
Select United flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿20,120 found 1 day ago
British Airways
Wed, 1 Oct - Wed, 8 Oct
SFO
San Francisco
LHR
London
฿20,185 Return, found 6 days ago
฿20,185
Return
found 6 days ago
Select British Airways flight, departing Wed, 1 Oct from San Francisco to London, returning Wed, 8 Oct, priced at ฿20,185 found 6 days ago
United
Wed, 1 Oct - Wed, 8 Oct
SFO
San Francisco
LHR
London
฿20,340 Return, found 6 days ago
฿20,340
Return
found 6 days ago
Select United flight, departing Wed, 1 Oct from San Francisco to London, returning Wed, 8 Oct, priced at ฿20,340 found 6 days ago
United
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿20,725 Return, found 1 day ago
฿20,725
Return
found 1 day ago
Select United flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿20,725 found 1 day ago
Delta
Sat, 13 Sep - Thu, 30 Oct
SFO
San Francisco
LHR
London
฿20,910 Return, found 1 day ago
฿20,910
Return
found 1 day ago
Select Delta flight, departing Sat, 13 Sep from San Francisco to London, returning Thu, 30 Oct, priced at ฿20,910 found 1 day ago
United
Wed, 1 Oct - Wed, 8 Oct
SFO
San Francisco
LHR
London
฿20,940 Return, found 6 days ago
฿20,940
Return
found 6 days ago
Select United flight, departing Wed, 1 Oct from San Francisco to London, returning Wed, 8 Oct, priced at ฿20,940 found 6 days ago
Swiss International Air Lines
Wed, 1 Oct - Wed, 8 Oct
SFO
San Francisco
LHR
London
฿21,820 Return, found 6 days ago
฿21,820
Return
found 6 days ago
Select Swiss International Air Lines flight, departing Wed, 1 Oct from San Francisco to London, returning Wed, 8 Oct, priced at ฿21,820 found 6 days ago
Air Canada
Fri, 13 Feb - Tue, 17 Feb
SFO
San Francisco
LHR
London
฿21,900 Return, found 13 hours ago
฿21,900
Return
found 13 hours ago
Select Air Canada flight, departing Fri, 13 Feb from San Francisco to London, returning Tue, 17 Feb, priced at ฿21,900 found 13 hours 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
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
฿17,905
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 London, 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 ฿7,550 and roundtrip prices from ฿17,905. 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 London 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 SFO to LHR 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 ฿17,905. 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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