The air ambulance was called to Crayford Way after a "fall" involving a woman in her 60s on Sunday evening (April 19).
The helicopter initially landed at Haberdashers' Aske's School and the medical team were driven to the patient by members of the public who saw the aircraft land.
The air ambulance then took off and relanded in The Dell, Crayford Way.
Police were called in to close roads and keep spectators at a safe distance.
A spokesman for the London Ambulance Service said: "We were called at 5.20pm to reports of a fall on Crayford Way in Dartford.
"We sent a number of resources including London's Air Ambulance to the scene.
"We treated a woman reported to be in her sixties for a head injury.
"She was taken by air ambulance to the Royal London Hospital."
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