Preferably, You must permit 3-5h of transit time in Johannesburg, so that you have sufficient time for you to capture your connecting flight. Transiting in Johannesburg is very uncomplicated; simply just follow the signs for ‘Worldwide Transit’. The flight from Johannesburg to Harare usually takes about 1h 30m. Off-peak Period: https://www.theluxurybooking.co.uk/flights-to-zimbabwe-from-london/