The man’s body fell from a Kenya Airways jet and landed in a garden in Clapham, south London at 3.41pm on Sunday.
The horrified owner of the garden called police who linked it with the Kenya Airways flight from Nairobi to Heathrow.
A statement from Kenya Airways said: “The Metropolitan Police in London have informed Kenya Airways of a body that fell off the landing gear of its aircraft moments before the flight landed in London Heathrow Airport.
“On June 30 at 1542hrs (UK time) a body of a yet to be in deified male stowaway landed in a garden in the Borough of Lambeth, South London, suggesting the stowaway was hidden in the undercarriage of the aircraft.
“The police have already been in contact with the Kenya High Commission to help identify and name the person.
“The aircraft was inspected and no damage reported. It was also cleared for operation.”
A bag, water, and food were later found in the landing gear compartment by police.
The 6,840km flight from Nairobi to Heathrow “takes eight hours and 50 minutes,” it added.
The Met Police said that “officers are working to establish the identity of a man believed to have fallen from the landing gear compartment of an aeroplane”.
Police were called at 3.39pm on Sunday, June 30, to a residential address in Offerton Road, Clapham, after the body was discovered in a garden.
In September 2012, a 30-year old from Mozambique, Jose Matada, died after falling from the undercarriage of a Heathrow-bound flight from Angola.