Direct bus transport to Maluk is infrequent. If you miss a morning bus from Sumbawa Besar, consider taking a bus to Taliwang and then arranging onwards travel from there.
Sumbawa Besar: 06:30 and 07:00 daily, costs 70,000 rupiah.
Mataram: Departs 06:30 and 20:00 daily, costs 100,000 rupiah and takes around six hours.
Thanks to the Newmont mine, a fast ferry service runs between Benete (a few kilometres north of Maluk) and Kayangan (beside Labuan Lombok on Lombok). It departs daily at 08:00 and 14:00 and takes one hour and twenty minutes to reach Lombok. Children cost 75,000, and adults 135,000 rupiah. In the reverse direction, the ferry leaves Lombok at 10:00 and 16:15 daily.