By bus
From Uganda to Congo via Bunagana Kisoro Border.There are many buses which operate daily between Bunagana /Uganda and Goma every day between 7AM and 1PM. Prices for the bus is US$5. A valid visa for both countries is required in either direction.Entry and exit procedures at Bunagana border are "easy" and straight forward, and people are very helpful in assisting visitors to get through without troubles.
By ship
Passenger and VIP ferries also locally known as 'Carnot Rapide' operate daily between Brazzaville and Kinshasa roughly every two hours between 8AM and 3PM. Prices for the ferries are: 15 US$ for the passenger and US$25 for the VIP ferry Carnot Rapide. The latter is recommended as these are brand new boats and not cramped. A valid visa for both countries is required in either direction as well as at least "officially" a special permit. The bureaucracy at either end require some time. Entry and exit procedures in Brazzaville are "easy" and straight forward and people are very helpful in assisting to get through without troubles. In contrast, these procedures are a bit difficult in Kinshasa and depend much on whether you are an individual traveller or assisted by an organisation or an official government representative.
There are also speed boats to hire, either in a group or alone price!, however, it is not advisable to book them as they really speed across the river along the rapids.