Preferably, You must permit 3-5h of transit time in Johannesburg, so you have ample time and energy to capture your connecting flight. Transiting in Johannesburg is rather quick; just Adhere to the signs for ‘Global Transit’. The flight from Johannesburg to Harare can take about 1h 30m. KAYAK’s flight Selling https://www.theluxurybooking.co.uk/flights-to-zimbabwe-from-london/