If Possible, it is best to let three-5h of transit time in Johannesburg, so that you've ample time to catch your connecting flight. Transiting in Johannesburg is quite uncomplicated; merely Adhere to the indicators for ‘Global Transit’. The flight from Johannesburg to Harare requires about 1h 30m. *Fares exhibited are https://www.theluxurybooking.co.uk/flights-to-zimbabwe-from-london/