The calculated distance (air line) between Perushtitsa and Stara Zagora is approximately 62 miles respectively 99 kilometers.
By car or train, the actual journey to Stara Zagora is certainly longer, as only the direct route (as the crow flies) between Perushtitsa and Stara Zagora has been calculated here.
Air line (approximately)
99 kilometers
54 nautical miles