The calculated distance (air line) between Pematangsiantar and Deli Tua is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Deli Tua is certainly longer, as only the direct route (as the crow flies) between Pematangsiantar and Deli Tua has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles