The calculated distance (air line) between Darfo Boario Terme and Reggio nell'Emilia is approximately 85 miles respectively 137 kilometers.
By car or train, the actual journey to Reggio nell'Emilia is certainly longer, as only the direct route (as the crow flies) between Darfo Boario Terme and Reggio nell'Emilia has been calculated here.
Air line (approximately)
137 kilometers
74 nautical miles