After the United States invasion of the Marianas, "Kennebago" departed the Marshalls on 19 June, and arrived in Saipan on 22 June to refuel ships of the 5th Fleet. After continuing refueling operations in the area, she departed Manus on 9 October to rendezvous with Vice Admiral Mitscher's Fast Carrier Task Force, Task Force 38, conducting operations in the Philippine Sea. After refueling ships until 23 October, she departed for Ulithi, continuing to refuel ships east of the Philippines until 25 December. Next, she would support the landing operations in Lingayen Gulf, fueling ships that were operating as part of the task force. She continued on refueling operations in the theater until 6 April 1945, when she would sail for Los Angeles, California, arriving there 24 April.