Ideally, you'll want to allow three-5h of transit time in Johannesburg, so that you have ample time and energy to catch your connecting flight. Transiting in Johannesburg is very effortless; merely Keep to the indications for ‘International Transit’. The flight from Johannesburg to Harare can take about 1h 30m. Precisely https://www.theluxurybooking.co.uk/flights-to-zimbabwe-from-london/