Burundi's transport network is limited and underdeveloped. According to a 2012 ''DHL Global Connectedness Index'', Burundi is the least globalised of 140 surveyed countries. Bujumbura International Airport is the only airport with a paved runway and as of May 2017 it was serviced by four airlines (Brussels Airlines, Ethiopian Airlines, Kenya Airways and RwandAir). Kigali is the city with the most daily flight connections to Bujumbura. The country has a road network but  less than 10% of the country's roads were paved and  private bus companies were the main operators of buses on the international route to Kigali; however, there were no bus connections to the other neighbouring countries (Tanzania and the Democratic Republic of Congo). Bujumbura is connected by a passenger and cargo ferry (the MV Mwongozo) to Kigoma in Tanzania. There is a long-term plan to link the country via rail to Kigali and then onward to Kampala and Kenya.