"Starling" resumed convoy duty until 10 May 1944, when she was assigned to assist in transporting the V Amphibious Corps from the Guadalcanal staging area. This was the Southern Attack Force for the amphibious assault against Guam. Later in the month, the force held practice landings off Cape Esperance and finally departed on 4 June for the Marshall Islands. The minesweeper left Kwajalein on 17 July with Task Group (TG) 53.9, the Minesweeping and Hydrographic Unit, for Guam. She performed antisubmarine and patrol duty and remained in the Marianas until sailing for Eniwetok on 19 September.