Following shakedown in Chesapeake Bay, Montour sailed for Hawaii, arriving Pearl Harbor 1 February 1945.

Assigned to transport troops destined for occupation duty in Japan, Montour departed Lingayen Gulf, arriving at Wakayama Ko, Honshū, 7 October.

Montour debarked soldiers at Ise Wan, Honshū 27 October, and then reported for duty with the Operation Magic Carpet fleet for the next four months.

She made two voyages from Okinawa to the West Coast, disembarking troops at Portland and San Francisco.

Delivered to the War Shipping Administration 23 April, Montour was struck from the Naval Vessel Register 8 May.