Onega River traversed by ferry crossings. Onega River The Onega (; ) is a river in Kargopolsky, Plesetsky, and Onezhsky Districts of Arkhangelsk Oblast in Russia. The Onega connects Lake Lacha with the Onega Bay in the White Sea southwest of Arkhangelsk, flowing in the northern direction. The discharge at the source is and at the mouth is . The river is long, and the area of its basin . Its main tributaries are the Voloshka (right), the Kena (left), the Mosha (right), the Kodina (right), and the Kozha (left). The major tributary of the Lake Lacha is the Svid. The name
Onega, Russia limited passenger service on the Onega Bay. The Onega is served by the Onega Airport which has weekly passenger flights to Arkhangelsk and to the "selo" of Purnema on the Onega Peninsula. Close to the town, there is also an uncompleted military air base, Onega Andozero. In 2003, the Russian inland oil shipping company Volgotanker started using the White Sea-Baltic Canal for exporting fuel oil. The scheme involved delivering oil by river tanker, over the canal and into a floating transfer terminal near the Osinki Island in the Onega Bay, 36 km north-east of the port of Onega, for transfer