Daily flights to Nairobi, Khartoum, Entebbe, and Addis Ababa are available.
There are weekly barges from Juba to the north. It will take 10 days to 2 weeks from Juba to Kosti 250 km south of Khartoum, it is hot, bring your own food and water and something to create some shade. From Kosti, there are daily busses and minibuses to Khartoum.
Other than flying, it is quite difficult to get out of Juba without your own transport hired vehicles come with a driver who is instructed not to leave Juba. Even walking out of town into the countryside is difficult - the semi-rural sprawl of Juba extends for miles of shacks and squatter housing even on the eastern side of the Nile. Lots of paths out of town end up at one of the many army camps - who are not keen on trespassers! And of course landmines are still a risk.
