Flowing southeast across the subcontinent, the Ganga is joined by other large rivers such as the Yamuna at Allahabad in India and then the mighty Brahmaputra in Bangladesh.
Šķērsojot subkontinentu dienvidaustrumu virzienā, Ganga uzņem sevī citas lielas upes, piemēram, Indijā pie AIlahabadas tajā ietek Džamna, bet Bangladešā — Bramaputra.