Ideally, You ought to enable three-5h of transit time in Johannesburg, so that you've got ample time to capture your connecting flight. Transiting in Johannesburg is very quick; merely follow the signs for ‘Intercontinental 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/