The calculated distance (air line) between Smilavičy and Svyetlahorsk is approximately 105 miles respectively 169 kilometers.
By car or train, the actual journey to Svyetlahorsk is certainly longer, as only the direct route (as the crow flies) between Smilavičy and Svyetlahorsk has been calculated here.
Air line (approximately)
169 kilometers
91 nautical miles