The calculated distance (air line) between Sv. Trojica v Slov. Goricah and Izola is approximately 128 miles respectively 206 kilometers.
By car or train, the actual journey to Izola is certainly longer, as only the direct route (as the crow flies) between Sv. Trojica v Slov. Goricah and Izola has been calculated here.
Air line (approximately)
206 kilometers
111 nautical miles