The calculated distance (air line) between Solomyansk and Khmelnytskyi is approximately 170 miles respectively 273 kilometers.
By car or train, the actual journey to Khmelnytskyi is certainly longer, as only the direct route (as the crow flies) between Solomyansk and Khmelnytskyi has been calculated here.
Air line (approximately)
273 kilometers
147 nautical miles