A semiconductor package includes: a connection structure including one or more redistribution layers; a core structure disposed on a surface of the connection structure; a semiconductor chip disposed on the surface and including connection pads electrically connected to the redistribution layers of the connection structure; a first encapsulant disposed on the surface and covering at least a portion of each of the core structure and the semiconductor chip; an antenna substrate disposed on the first encapsulant and including one or more wiring layers, at least a portion of the wiring layers including an antenna pattern; and a through via penetrating at least a portion of each of the connection structure, the core structure, the first encapsulant, and the antenna substrate.