The calculated distance (air line) between Kostopil and Ivano-Frankivsk is approximately 156 miles respectively 251 kilometers.
By car or train, the actual journey to Ivano-Frankivsk is certainly longer, as only the direct route (as the crow flies) between Kostopil and Ivano-Frankivsk has been calculated here.
Air line (approximately)
251 kilometers
135 nautical miles