"Leland E. Thomas", with other ships of Escort Division 76, proceeded to the southwest Pacific 17 November, arriving at Manus 20 December. From 1 January to 19 February 1945, she escorted convoys between Leyte Gulf, Manus, and Hollandia. The destroyer escort was busy defending Mangarin Bay, Mindoro, and patrolling lanes in the Sulu Sea, Mindoro Strait, and western approaches to Luzon until 17 March. On 4 March, while she was investigating a possible submarine sighting south of San Jose de Buenavista, Panay, her lookouts spotted enemy planes on a nearby airstrip. Immediately the ship requested fighter-bombers which soon effectively bombed the airstrip. From 18 March to 28 April, she escorted ships and convoys within the Philippine sea frontier.