update (17 July 2019): According to Uganda's State Minister for Works, Katumba Wamala, Uganda Airlines "will be ready to go by 31 July 2019" [src.]. We'll keep you posted!
update (12 June 2019): Uganda Airline's first flight will be from Entebbe International Airport (EBB) in Entebbe to Jomo Kenyatta International Airport (NBO) in Nairobi, Kenya. The airline received two Bombardier CRJ900s in April 2019; the other two Bombardier CRJ900s are expected in July 2019 and September 2019.
According to the Uganda Media Centre, the official centre for public pommunications of Uganda's government, Uganda Airlines' first two Bombardier CRJ 900 aircrafts are set to arrive in Uganda on 23 April 2019. Once the country's new startup national carrier has received the two aircrafts, a five phase process to get the all-important and mandatory Air Operator Certificate (AOC) needs to be completed. This process usually takes 90 days, so that Uganda Airlines will presumably commence operations in late July 2019. Before flights officially commence, the airline also has to fulfill Civil Aviation Authority of Uganda's (CAA) mandatory requirements. These include proper operating premises, trained staff, maintenance providers, tools and equipment as well as structures, processes and systems to enable safe and secure operation of international commercial flights. We'll keep you posted!