The calculated distance (air line) between Pematangsiantar and Tanjungtiram is approximately 90 miles respectively 145 kilometers.
By car or train, the actual journey to Tanjungtiram is certainly longer, as only the direct route (as the crow flies) between Pematangsiantar and Tanjungtiram has been calculated here.
Air line (approximately)
145 kilometers
78 nautical miles