The calculated distance (air line) between Ts’khinvali and Zest’aponi is approximately 48 miles respectively 78 kilometers.
By car or train, the actual journey to Zest’aponi is certainly longer, as only the direct route (as the crow flies) between Ts’khinvali and Zest’aponi has been calculated here.
Air line (approximately)
78 kilometers
42 nautical miles