You have bus from Podgorica, Niksic, Pljevlja and Mojkovac several times per day.
From Niksic – Savnik (47 km) – Zabljak (37 km) there are 84 km.(before tunnel on Vojnik mountain) This route is beautiful but hard to drive mountain approach as road is slow and narrow with two major ascents: fist it ascends from Niksic (649m ) to Krnovo pass (1487m). second from Savnik (824m) via narrow road to Zabljak (1450m)
Second road Niksic – Savnik (35 km)- Zabljak (37km)- 72 km since road and tunnel on Vojnik mountain, which connects Nikšic – Piva river road with Savnik town.
From Podgorica to Niksic is 55 km with good road.
Podgorica - Kolašin (71 km) – Mojkovac (21 km)- Zabljak (67 km) – 159 km and road is good all the way to Zabljak.
If you want to come to Durmitor (zabljak) by plane, the closest airport is in Podgorica, capital of Montenegro. There are two airlines who operated Serbian JAT and Montenegrin Montenegro airlines. Once in Podgorica by plane, you will have to take a bus or rent a car for Zabljak. From Podgorica to Zabljak there are about 160 km.