The calculated distance (air line) between Rehnān and Fereydūnshahr is approximately 88 miles respectively 141 kilometers.
By car or train, the actual journey to Fereydūnshahr is certainly longer, as only the direct route (as the crow flies) between Rehnān and Fereydūnshahr has been calculated here.
Air line (approximately)
141 kilometers
76 nautical miles