Preferably, You must let 3-5h of transit time in Johannesburg, so that you have enough time to capture your connecting flight. Transiting in Johannesburg is very easy; merely Keep to the indications for ‘Global Transit’. The flight from Johannesburg to Harare normally takes about 1h 30m. The flight was delayed https://www.theluxurybooking.co.uk/flights-to-zimbabwe-from-london/