The calculated distance (air line) between Velyki Mosty and Chernivtsi is approximately 157 miles respectively 253 kilometers.
By car or train, the actual journey to Chernivtsi is certainly longer, as only the direct route (as the crow flies) between Velyki Mosty and Chernivtsi has been calculated here.
Air line (approximately)
253 kilometers
137 nautical miles