The calculated distance (air line) between Mohyliv-Podilskyy and Rivne is approximately 166 miles respectively 268 kilometers.
By car or train, the actual journey to Rivne is certainly longer, as only the direct route (as the crow flies) between Mohyliv-Podilskyy and Rivne has been calculated here.
Air line (approximately)
268 kilometers
144 nautical miles