The calculated distance (air line) between Staryya Darohi and Smarhoń is approximately 125 miles respectively 202 kilometers.
By car or train, the actual journey to Smarhoń is certainly longer, as only the direct route (as the crow flies) between Staryya Darohi and Smarhoń has been calculated here.
Air line (approximately)
202 kilometers
109 nautical miles