The calculated distance (air line) between Gotse Delchev and Stara Zagora is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Stara Zagora is certainly longer, as only the direct route (as the crow flies) between Gotse Delchev and Stara Zagora has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles