The calculated distance (air line) between Khorostkiv and Zalishchyky is approximately 40 miles respectively 65 kilometers.
By car or train, the actual journey to Zalishchyky is certainly longer, as only the direct route (as the crow flies) between Khorostkiv and Zalishchyky has been calculated here.
Air line (approximately)
65 kilometers
35 nautical miles