The calculated distance (air line) between Pematangsiantar and Tanjungbalai is approximately 50 miles respectively 81 kilometers.
By car or train, the actual journey to Tanjungbalai is certainly longer, as only the direct route (as the crow flies) between Pematangsiantar and Tanjungbalai has been calculated here.
Air line (approximately)
81 kilometers
44 nautical miles