On February 19, 1945, Sprague assumed command of Carrier Division 26 embarked on for the invasion of Iwo Jima where his unit provided close air support for the Marines ashore. The next month he moved his flag back to "Fanshaw Bay" for the invasion of Okinawa. In April 1945, Sprague was given command of Carrier Division 2, a fast carrier Task Group and moved his flag to on June 1, 1945. His task group operated against the Japanese home islands of Kyūshū, Honshū, and Hokkaidō. Sprague received the notification of the end of hostilities while steaming 151 miles off the eastern coast of Honshū on August 15, 1945. Four days after the Japanese surrender, Sprague and "Ticonderoga" entered Tokyo Bay.