Who kept odyssey from returning to Ithaca?

Odysseus was kept from returning to Ithaca primarily by the nymph Calypso, who held him captive on her island, Ogygia, for several years. Additionally, Poseidon, the god of the sea, sought to impede his journey home due to Odysseus blinding his son, the Cyclops Polyphemus. These divine interventions, along with various challenges and obstacles, prolonged Odysseus's journey back to his homeland.