By Boat/Water Taxi
These ply the strait between Buka Island and main Bougainville on a regular basis. To get to the outer islands, ask around in Buka to find a boat charter.
By car
By car
There are no sealed roads in Bougainville. A gravel track connects Arawa and Buin in the southeastern quarter on the main island, and there is circular road around the perimeter of Buka Island which is graveled in part. Otherwise "roads" are primarily rough dirt tracks. The southwest of the main island is especially remote and cannot be reached even in 4WD vehicles. Troop carriers left over from the war as well as Land Cruisers are used as public transit vehicles, and are widespread.