Wotje has an airstrip near the village, and Air Marshall Islands has served it when domestic operations allow. Confirm schedules in Majuro, reconfirm close to departure, and leave room for delays.
Field-trip vessels are the other route. They are slower and less predictable, but they are part of how the outer islands function. Ask locally about the current ship schedule, where it lands on Wotje, and whether accommodation can be arranged before you board.