Flights hackSearch one-way tickets on two airlines
Two one-way fares on different airlines are often cheaper than one return – and give you more freedom to change plans.
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✈️ Cheap flights from San Francisco to London
Compare San Francisco – London fares from hundreds of airlines and travel sites. The trip is about 8,616 km and takes around 11 h 05 min nonstop.
📏 Distance8,616 km (5,354 miles)
⏱️ Flight timeabout 11 h 05 min nonstop
🕒 Time differenceLondon is 8 hours ahead of San Francisco
🛫 AirportsSFO → LHR, LGW, STN, LTN, LCY, SEN
💸 Cheapest monthOct 2026 – from $781
📅 Cheapest months to fly San Francisco → London
- $781Oct 26
- $814Nov 26
- $1,158Dec 26
Lowest fares our Fare agent saw for each month. Prices change daily.
🌞 Best time to visit United Kingdom
Best: May-September – the longest, warmest days for hiking, festivals and coastal trips; Scotland's long summer evenings are magical.
Shoulder season: April and October – fewer crowds, spring blossom or autumn colour, and generally mild weather.
Weather by month in London
- 8°Jan⛅
- 9°Feb⛅
- 12°Mar⛅
- 15°Apr⛅
- 18°May⛅
- 22°Jun⛅
- 24°Jul⛅
- 23°Aug⛅
- 20°Sep⛅
- 16°Oct🌧
- 11°Nov🌧
- 9°Dec🌧
Average daytime highs (°C) and how rainy each month is.
📍 Things to do when you land
- London's free museums – Wander the British Museum, Natural History Museum and Tate Modern without paying an entry fee.
- See a West End show – Catch a musical or play in the theatre district that rivals Broadway.
- Stonehenge at sunrise – Watch dawn light strike the great stones on Salisbury Plain, ideally around the solstice.
- Edinburgh Castle – Climb the Royal Mile to a fortress perched on a volcanic crag high above Scotland's capital.
United Kingdom travel guide → All flights to United Kingdom →
💡 Tips for a cheaper ticket
Money hackUse a no-foreign-fee card
A debit or credit card without foreign transaction fees saves 2–3% on every purchase and ATM withdrawal abroad.
Flights hackBook the long-haul as a stopover
Many airlines let you stop in their hub city for a few days at no extra fare – two trips for the price of one.
San Francisco to London flights: questions
How long is the flight from San Francisco to London?
A nonstop flight from San Francisco to London takes about 11 h 05 min for the 8,616 km (5,354 miles) trip. Flights with a connection take longer – usually 2 to 5 hours more.
How far is London from San Francisco?
London is about 8,616 km (5,354 miles) from San Francisco as the plane flies.
What is the time difference between San Francisco and London?
Right now London is 8 hours ahead of San Francisco. Daylight saving changes can shift this by an hour during the year.
What is the cheapest month to fly from San Francisco to London?
Recently the lowest fares were in Oct 2026, from about $781. Prices change daily.
Which airports serve San Francisco and London?
From San Francisco: San Francisco Intl (SFO). In London: London Heathrow (LHR), London Gatwick (LGW), London Stansted (STN), London Luton (LTN), London City (LCY), London Southend (SEN).
Do I need a visa for United Kingdom?
It depends on your passport – see our United Kingdom visa & entry guide.
More flights from San Francisco
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