The calculated distance (air line) between Salihorsk and Svyetlahorsk is approximately 93 miles respectively 149 kilometers.
By car or train, the actual journey to Svyetlahorsk is certainly longer, as only the direct route (as the crow flies) between Salihorsk and Svyetlahorsk has been calculated here.
Air line (approximately)
149 kilometers
80 nautical miles